Alternatives to Phonic-1
Compare Phonic-1 alternatives for your business or organization using the curated list below. SourceForge ranks the best alternatives to Phonic-1 in 2026. Compare features, ratings, user reviews, pricing, and more from Phonic-1 competitors and alternatives in order to make an informed decision for your business.
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GPT-Live-1
OpenAI
GPT-Live-1 is one of the two new GPT-Live voice models rolling out to ChatGPT users globally, built to make talking with AI feel much more like having a real conversation. It is powered by a full-duplex architecture, so it can listen and speak at the same time instead of waiting for one rigid turn to end before the next begins. During conversations, GPT-Live-1 can show it is paying attention with short acknowledgments, engage in quick back-and-forth, pause when the user needs a moment to think, or stay quiet when asked to listen. It continuously processes input while generating output, allowing the model to decide many times per second whether to speak, keep listening, pause, interrupt, or invoke a tool. GPT-Live-1 also separates natural interaction from deeper work: when a question requires web search, reasoning, or more agentic capabilities, it can delegate the task to a frontier model behind the scenes and bring the result back when it is ready. -
2
Grok Voice 3.0
SpaceXSI
Grok Voice 3.0 is a speech-to-speech model offered through the Grok Voice Agent API for developers building real-time voice applications. It accepts audio and text and returns spoken audio or text through a WebSocket session, supporting conversational turn-taking, interruptions, and function calling. Developers can connect the model to custom functions and server-side tools, including web search, X search, collections, and remote MCP servers. The API is intended for interactive voice agents such as customer-support and service-call experiences, and is also used for voice interactions in Tesla vehicles and Grok Bot. Billing is usage-based, with audio charged per minute and text input events billed separately. The API documentation includes setup instructions and examples for Python and JavaScript clients.Starting Price: $0.08/min -
3
Gemini 3.8 Live
Google
Gemini 3.8 Live is Google DeepMind’s real-time speech-to-speech AI model for building conversational voice applications and interactive agents. The model can maintain natural dialogue while reasoning, using tools, and carrying out tasks during an ongoing conversation. Asynchronous function calling allows applications to execute API and tool requests in the background while Gemini continues streaming audio responses to the user. Gemini 3.8 Live can also incorporate live visual context, enabling agents to respond based on what users say and what the system can see. It supports more than 97 languages, maintains accent consistency, and is designed to accurately interpret alphanumeric information such as confirmation codes, claim numbers, and technical data. Gemini 3.8 Live is available through the Gemini Live API and Google AI Studio for developers building customer service agents, assistants, training applications, and other voice-first experiences. -
4
Phonic
Phonic.ai
Phonic is an AI-powered voice agent platform that enables businesses to build and deploy natural, real-time conversational assistants for phone calls and other voice interactions. Its Phonic-1 speech-to-speech model processes spoken audio directly, allowing agents to understand tone, hesitation, and conversational context without relying on separate transcription and text-to-speech systems. The platform delivers responses in approximately 600 milliseconds and supports more than 50 languages with seamless language switching during conversations. Its AI agents can execute tool calls while a person is still speaking, enabling real-time information retrieval, workflow automation, and task completion. Developers can create and manage voice agents using APIs, Python and TypeScript SDKs, a command-line interface, or a no-code agent builder. Phonic also provides conversation monitoring, enterprise security controls, and flexible cloud, private infrastructure, and self-hosted deployment options -
5
PhonicsMaker
Enzi.ai
PhonicsMaker is an innovative online tool designed to revolutionize phonics instruction for educators and students alike. By allowing teachers to generate engaging, curriculum-aligned phonics stories in just 120 seconds, it addresses the challenge of outdated and repetitive decodable texts. Tailored to the Victorian Curriculum, PhonicsMaker enables the creation of personalized stories featuring themes like dinosaurs, robots, or even student-chosen characters, thereby increasing student engagement and enthusiasm for reading. The platform offers a straightforward three-step process: select phonemes, input a story idea, and choose the appropriate difficulty level (Foundation to Year 2). Educators report reclaiming over five hours weekly, while students experience a 30% improvement in foundational reading skills. With unlimited story generation available for a budget-friendly subscription, PhonicsMaker transforms phonics learning into an exciting and efficient experience.Starting Price: $20/month -
6
Star Phonics
Renaissance Learning
STAR Phonics is a web-based phonics assessment tool from Renaissance, intended to help educators quickly and precisely evaluate foundational reading skills in students. The assessment measures mastery across 12 key phonics categories and diagnoses 102 specific phonics skills, giving detailed insights into which phonics patterns a student has mastered and which require further instruction. The screening is efficient, typically taking only 2–5 minutes per student, and results are available immediately, without manual data entry. It provides diagnostic reports at the student, class, and grade level; these reports highlight patterns of error and skill-level gaps, helping teachers tailor instruction for individuals, small groups, entire classes, or whole grades. Recently, STAR Phonics has added enhanced features like audio pronunciation for every assessment word (to support correct scoring), and improved exportable screener data (by phonics category and by individual word). -
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Reading Eggs
Reading Eggs
ABC Reading Eggs makes learning to read interesting and engaging for kids, with great online reading games and activities. Children love the games, songs, golden eggs and other rewards which, along with feeling proud of their reading, really motivate children to keep exploring and learning. Toddlers build pre-reading skills such as phonemic awareness and alphabet knowledge with fun activities, games, videos and read-aloud books. Children take their first steps in learning to read, covering phonics, sight words, spelling, vocabulary and comprehension. A systematic, synthetic phonics program to help emergent and struggling readers build key phonics skills. Continues the learning journey by helping children learn to read for meaning and enjoyment.Starting Price: $9.17 per month -
8
Dessa
Block
Dessa is Block's speech-to-speech artificial intelligence model for conversational voice research and applications. It takes audio input and produces audio output directly, without converting speech into text as an intermediate step. Trained from scratch on human conversation rather than text, the model supports full-duplex interaction, listening and speaking at the same time, and runs locally on a MacBook Pro with an M4 Max chip or better. It captures conversational cues such as emotion, sarcasm, laughter, pauses, and turn-taking that can be lost in text-based pipelines. Dessa is intended for AI safety researchers and developers studying voice-model behavior, privacy, and real-time interaction. It is a speech model for research and development, not a general-purpose business application or hosted voice-agent platform. -
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Eleven Realtime
ElevenLabs
Eleven Realtime is a developer-facing speech-to-speech API for adding live voice conversations to applications and AI agents. It combines speech recognition, turn-taking, language-model reasoning, and voice generation, with Mini and Max model options for different conversational needs. Developers can use the models through the Realtime API or select them in ElevenAgents. The streaming interface is designed for interactive voice experiences, including assistants, customer support, tutors, and interactive characters. Agent configurations can include prompts, voices, tools, knowledge bases, and conversation flows. Realtime usage is billed per minute plus model input and output tokens. The product is intended for developers and organizations building real-time conversational applications and voice-enabled customer experiences. -
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Imagine Language & Literacy
Imagine Learning
Imagine Language & Literacy is a personalized learning program designed to accelerate both literacy skills and English language development for students in grades PreK–6. It offers direct, explicit, and systematic instruction across four language domains, adapting learning pathways to each student's needs. It integrates the "Big 5" components of reading, phonemic awareness, phonics, fluency, vocabulary, and comprehension, aligned with the science of reading. It dynamically adjusts instruction and groups students based on skill gaps, suggesting targeted activities. Imagine Language & Literacy supports multilingual learners with human-voiced audio in 15 languages and print materials in additional languages, gradually transitioning students to English proficiency. -
11
Higgs Realtime
Boson AI
Higgs Realtime is a production-quality, real-time speech-to-speech model and API built for natural, continuous conversation. It is an end-to-end, instruction-tuned, audio-native model that can understand audio, text, or both and generate high-quality responses, while also functioning as a text LLM when given text alone. Designed for live voice agents, it follows conversations, handles interruptions, adapts when requests change mid-sentence, and carries multi-step workflows through to completion. The model is trained specifically for voice-agent reflexes such as natural turn-taking, conversational cadence, tone adaptation, spoken tool preambles, multi-turn state tracking, and robust instruction following through changing requests. Semantic turn detection helps distinguish a completed turn from a pause, while multilingual and code-switched understanding supports more than 100 languages without per-language setup.Starting Price: $0.0023 per minute -
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Cartesia Ink-Whisper
Cartesia
Cartesia Ink is a family of real-time streaming speech-to-text (STT) models designed to power fast, natural conversations in voice AI applications, acting as the “voice input” layer that converts spoken language into accurate text instantly. Its flagship model, Ink-Whisper, is specifically engineered for conversational environments, delivering ultra-low latency transcription with a time-to-complete-transcript as fast as 66 milliseconds, enabling fluid, human-like interactions without noticeable delays. Unlike traditional transcription systems built for batch processing, Ink is optimized for live dialogue, handling fragmented, variable-length audio through dynamic chunking, which reduces errors and improves responsiveness during pauses, interruptions, or rapid exchanges.Starting Price: $4 per month -
13
Gemini 3.8 Flash-Lite TTS
Google
Gemini 3.8 Flash-Lite TTS is Google’s cost-efficient text-to-speech model designed for high-volume dubbing, audio production, and expressive voice-agent applications. The model provides fine-grained control over tone, pacing, expressive nuance, and line-by-line vocal delivery. It supports long-form speech generation while maintaining natural pacing, voice quality, and speaker consistency across extended content. Native two-speaker scene staging enables multi-turn dialogue with distinct voices and natural conversational turn-taking from a single script. Gemini 3.8 Flash-Lite TTS supports more than 100 languages and can add nonverbal cues and backchanneling to create more natural conversational audio. The model is available through the Gemini API and Google AI Studio, with deployment through Google Vids and planned enterprise availability through Gemini Enterprise. -
14
Lalilo
Lalilo
Lalilo is a web-based foundational literacy program for early elementary (grades K–2) that delivers adaptive, standards-aligned practice in phonics, phonology, phonemic awareness, word recognition, sight-words, word families, reading comprehension, grammar and conventions, and vocabulary. From the first session, students take a placement test, and the system uses artificial intelligence to tailor the subsequent lessons to their level, ensuring each student works on “just-right” content. Lessons combine interactive exercises, voice/sound cues, and scaffolded reading tasks; as students progress, they unlock new stories, collect badges, and engage with content in a visually appealing, game-like journey. Teachers get detailed dashboards and reporting at class- and student-level, allowing them to assign custom lessons, monitor progress on individual skills (from phoneme recognition to comprehension), and identify areas needing support. -
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Dystech
Dystech
Dystech is an Australian company dedicated to simplifying reading assessments and dyslexia screening through innovative, AI-driven tools. Their platform, Dyscover, offers online assessments for various reading concepts, including phonics, fluency, and phonological awareness, suitable for both in-person and remote administration. Dyscover is widely used by professionals such as speech pathologists, teachers, teacher assistants, and tutors working with students aged five and above. The platform provides instant, comprehensive reports after each assessment, eliminating the need for manual grading and enabling a data-driven approach to literacy interventions. Additionally, Dystech's AI assistant, Dystutor, generates personalized recommendations and lesson plans based on assessment results, further supporting educators in addressing individual student needs. Dystech's mission is to make reading assessments more accessible and efficient, ultimately improving literacy outcomes.Starting Price: $5.65 per month -
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ClassX
ClassX
ClassX is an AI-powered education platform that transforms how students and teachers learn, teach, and grow. It offers personalised learning experiences through intelligent tutors, conversation tools, and creative content-generation assistants. Designed for every level of learner, ClassX helps people study smarter—not harder. Key Features: - AI Tutor & Conversation Practice: Learn languages and academic subjects through natural, human-like conversations powered by AI. - AI Homework Helper: Get step-by-step assistance with essays, questions, and study tasks—instantly. - Teacher Tools: Create rubrics, lesson plans, and graded feedback in seconds with educator-specific AI tools. - Interactive Learning Modules: Access bite-sized video lessons, phonics games, and storytelling adventures for younger learners.Starting Price: $9/month -
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MiniMax Speech 2.8
MiniMax
MiniMax Speech 2.8 is a next-generation AI speech model built to make synthetic voice feel alive, expressive, and deeply human. It focuses on performance in real-world voice agent scenarios, combining ultra-fast response, richer emotional expression, cleaner audio, and stronger cross-lingual performance for products that need natural spoken interaction. Speech 2.8 is designed to reduce the distance between AI voice and real human communication, giving developers and creators more control over how a voice sounds, reacts, and carries meaning. It supports flexible emotion control, allowing users to shape delivery with moods, tone, and expressive direction instead of relying on flat or robotic speech. It can produce speech with more natural pauses, cadence, emphasis, and emotional texture, helping AI characters, assistants, narrators, and interactive agents sound more believable across longer conversations. -
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Renaissance Freckle
Renaissance Learning
Freckle is a digital learning and practice platform for K–12 that delivers differentiated, adaptive practice in both math and English Language Arts, continuously adjusting to meet every student at their “just-right” level. It begins by placing students, via a brief adaptive assessment or existing standards data, at an initial level, then offers self-paced or teacher-assigned exercises aligned to standards. In math, Freckle supports foundational through high-school math (addition, subtraction, number facts, algebra, geometry, etc.), while in ELA, it provides hundreds of fiction and nonfiction passages, grammar, sight-words, word-study, phonics, reading-comprehension activities, and more. As students work, Freckle adapts in real time; if a student struggles, the system offers easier or scaffolded content, and if they excel, it advances them, supporting skill development, mastery, and confidence.Starting Price: Free -
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Cartesia Sonic-3.6
Cartesia
Sonic is a real-time text-to-speech model built for voice agents, combining natural delivery, sub-90ms latency, and native support for more than 40 languages. It is designed to make voice interactions feel effortless, with tone that adjusts to context, consistent pacing, and speech that follows the natural rhythm of conversation. By default, Sonic interprets the emotional subtext of a transcript and calibrates delivery automatically, while non-verbal expressions such as laughter can be inserted directly into the text. The model follows transcripts faithfully, produces clean audio across languages and voices, and handles alphanumeric content such as order numbers, phone numbers, IDs, and email addresses naturally without preprocessing. Context-aware pronunciation helps heteronyms sound correct from surrounding words, while custom pronunciation dictionaries let teams define how proper nouns and domain-specific terms should be spoken.Starting Price: $5 per month -
20
LETRS
Lexia
The LETRS® (Language Essentials for Teachers of Reading and Spelling) Suite is professional learning that provides educators and administrators with deep knowledge to be literacy and language experts in the science of reading. Developed by renowned literacy experts Dr. Louisa Moats, Dr. Carol Tolman, and Dr. Lucy Hart Paulson, it is a flexible literacy professional learning solution for educators and administrators. LETRS teaches the skills needed to master the fundamentals of reading instruction, phonological awareness, phonics, fluency, vocabulary, comprehension, writing, and language. Research shows that only 35% of students are reading proficiently, but 95% of students CAN learn to read. And while teachers are the most essential factor in student success, only about half of teaching institutions effectively prepare teachers for literacy instruction. Teaching reading requires a deep understanding of the processes and science behind it. -
21
Gradium
Gradium
Gradium is a voice AI platform for developers and organizations building speech-enabled applications and conversational agents. Its hosted APIs provide streaming text-to-speech, speech-to-text, speech translation, and speech-to-speech, with WebSocket and REST interfaces, real-time turn detection, pronunciation controls, and voice design or cloning features. A browser-based studio lets users try the models and manage voices, while documentation and SDK guides support application development. Use cases include voice agents, customer-service automation, live transcription, multilingual voice experiences, and spoken content generation. Gradium also publishes Phonon, an open-weight text-to-speech model designed for local, offline use in applications and on-device systems. Plans use credits for speech generation, transcription, and translation.Starting Price: $0/month -
22
StepsWeb
StepsWeb
Leading online literacy program that adapts to each learner and practices all the core skills needed for reading and spelling. Develop the core skills needed for reading and spelling in a way that is research-based and comprehensive, but also effective and enjoyable. StepsWeb analyses each learner’s literacy level and puts them on the right level of a structured literacy course. It will continually analyze each learner’s errors and create individualized reinforcement, online and printable. StepsWeb has a strong emphasis on phonological awareness and phonic knowledge. Activities also build automaticity and reading fluency by developing orthographic mapping skills. A range of enjoyable memory games develops visual memory, auditory sequential memory, and working memory. StepsWeb is a popular solution for whole-school use. Offering an adaptive literacy progression that caters to all learners, from remedial to extension.Starting Price: $10 per year -
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Cartesia Sonic-3.5
Cartesia
Sonic 3.5 is Cartesia’s fastest, most natural text-to-speech model, built for expressive, real-time voice generation with sub-90ms latency and native support for 42 languages. It is designed to follow transcripts faithfully, voice confirmation codes, and heteronyms correctly without preprocessing, and stay expressive enough to carry a real conversation. It supports languages intended to deliver native-quality speech. Sonic 3.5 focuses on clean audio across every language and voice, with no artifacts to edit out, making it practical for production voice experiences where quality, speed, and consistency matter. Its expressive conversational delivery provides strong pacing and real emotional range, tuned for support and agent transcripts. Alphanumerics such as order numbers, phone numbers, IDs, and emails are spoken naturally in every language, while context-aware English pronunciation helps words like read, bass, and bow land correctly from the surrounding text. -
24
Voxtral Mini TTS 3.0
Mistral AI
Voxtral Mini TTS 3.0 is Mistral AI's text-to-speech model for developers building voice-enabled applications and services. It generates speech from text in batch and real-time workflows, with preset or cloned voices, emotion and pace controls, and custom pronunciation. The model supports multilingual speech generation and dialect adaptation, making it suitable for conversational audio, localized content, spoken responses, and voice agents. Developers can access speech generation and voice-cloning capabilities through Mistral's API. Voxtral Mini TTS 3.0 is also part of Mistral's Voxtral 3 voice-agent stack, which combines speech recognition, reasoning, tool use, and generated speech; the Voxtral 3 stack can be self-deployed on customer infrastructure.Starting Price: $13/1M chars -
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Grok Voice Think Fast 2.0
SpaceXSI
Grok Voice Think Fast 2.0 is xAI’s flagship voice model for building real-time assistants, phone agents, and interactive voice systems that stream audio and text bidirectionally over WebSocket. Developers can configure system instructions, high or no reasoning effort, built-in or custom voices, automatic server-side voice activity detection, silence duration, idle re-engagement, playback speed, and session resumption after temporary disconnects. It accepts PCM, G.711 μ-law, G.711 A-law, and Opus audio through JSON or raw binary frames, with configurable PCM sample rates from telephone quality to 48 kHz. It supports more than 20 languages with native-quality accents, automatic language detection, natural responses in the speaker’s language, and seamless code-switching. Language hints and up to 100 key terms improve transcription of regional speech, names, products, codes, addresses, and specialized terminology, while pronunciation replacements correct spoken output. -
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Voxtral Mini Transcribe Realtime 3
Mistral AI
Voxtral Mini Transcribe Realtime 3 is a speech-to-text model delivered through Mistral’s API for applications that need live transcription. It streams audio over WebSocket and returns transcript events while a person is speaking, with configurable streaming delays. Developers can use it to add real-time captions, voice-assistant input, or transcription to voice-agent workflows. The model provides turn detection, speaker diarization, and context biasing for domain-specific vocabulary, and supports transcription across 45 languages and dialects. Applications can connect to its real-time endpoint and receive transcription events as audio arrives, rather than waiting for an entire recording to finish. Voxtral Mini Transcribe Realtime 3 is part of Mistral’s Voxtral audio model family.Starting Price: $0.008/min -
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Grok Speech to Text (STT)
SpaceXSI
Grok Speech to Text is a standalone audio API built to help developers integrate fast, accurate transcription into any application. Built on the same stack that powers Grok Voice, Tesla vehicles, and Starlink customer support, the API is designed for use cases such as voice agents, real-time transcription tools, accessibility solutions, podcasts, meeting capture, telephony, and interactive audio experiences. Grok STT can generate transcripts from large audio files through a REST API or transcribe speech in real time through a low-latency WebSocket API. It includes word-level timestamps, speaker diarization, multichannel support, and intelligent Inverse Text Normalization that converts spoken language into properly formatted structured output for numbers, dates, currencies, and more. Grok Speech to Text is evaluated across phone calls, meetings, video and podcast content, and telephony, with strong performance in entity recognition and business use cases. -
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MaxScholar
MaxScholar
MaxScholar's Orton-Gillingham based Phonics and Reading Comprehension programs use research-based methods to help students improve their reading, writing, spelling, and comprehension abilities. Our browser-based software uses an Orton-Gillingham blended-learning environment to build reading, writing, and reading comprehension skills for all students. It was specifically created to help struggling readers, students in Special Education programs, English language learners, and students in RTI programs. Our workbooks & Orton-Gillingham materials are an extension of the software that will help students learn, and reinforce, all the skills learned in the different programs in MaxScholar. We now offer one-on-one remote tutoring using our Orton-Gillingham approach. Our OG trained teachers can help your child SOAR! This is especially valuable for students who have dyslexia. -
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GPT-Live-1.1
OpenAI
GPT-Live-1.1 is OpenAI’s full-duplex voice model for real-time conversational use in ChatGPT Voice. It listens and speaks continuously, so it can follow pauses, interruptions, and shifts in speaking pace rather than waiting for a clearly completed turn. In ChatGPT, Live conversations can combine voice with text and images, and may use web search, memory, and connected apps according to the account, plan, and workspace settings. Access is provided through ChatGPT experiences on the web and supported mobile apps, with availability and usage limits determined by plan. The model is intended for individuals and organizations that want spoken assistance for questions, brainstorming, information lookup, and everyday tasks. GPT-Live-1.1 succeeds GPT-Live-1 in OpenAI’s voice-model family.Starting Price: $20/user/month -
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Voxtral Small Transcribe 3
Mistral AI
Voxtral Small Transcribe 3 is a multilingual speech-to-text model for transcribing recorded audio. Mistral provides it through an audio transcription API and documents timestamps, speaker diarization, and context biasing, which allows developers to supply key phrases to help recognize domain-specific terms and names. The model automatically detects supported languages or accepts a language code, and supports more than 50 languages. It is designed for application developers building recorded-audio workflows, including meeting, interview, and call transcription, customer-service systems, and voice-agent pipelines. Mistral also describes self-deployment options for the Voxtral 3 family, including private-cloud and on-premises hosting.Starting Price: $0.004/min -
31
Dograh
Dograh
Dograh is an open source, self-hostable voice agent platform with a no-code workflow builder for creating production voice agents. Teams can choose their own inbound channels, speech-to-text, LLM, text-to-speech, and telephony providers, or replace the traditional cascade with speech-to-speech models for direct audio-in, audio-out conversations with natural turn-taking, interruption handling, and low latency. The platform supports inbound and outbound calling, widgets, telephony integrations, observability, traces, real-time analytics, hybrid pre-recorded voice plus TTS, and more than 70 languages. Its MCP server lets Claude Code, Cursor, OpenClaw, Codex, and other agent runtimes create, modify, and deploy voice agents directly from development environments. Dograh can run on your own servers, inside a private cloud or VPC, or in a managed environment, with support for models hosted entirely within your perimeter.Starting Price: 1¢ per minute -
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ElevenLabs
ElevenLabs
The most realistic and versatile AI speech software, ever. Eleven brings the most compelling, rich and lifelike voices to creators and publishers seeking the ultimate tools for storytelling. Generate top-quality spoken audio in any voice and style with the most advanced and multipurpose AI speech tool out there. Our deep learning model renders human intonation and inflections with unprecedented fidelity and adjusts delivery based on context. Our AI model is built to grasp the logic and emotions behind words. And rather than generate sentences one-by-one, it’s always mindful of how each utterance ties to preceding and succeeding text. This zoomed-out perspective allows it to intonate longer fragments convincingly and with purpose. And finally you can do this with any voice you want.Starting Price: $1 per month -
33
GPT-Realtime-2.1
OpenAI
GPT-Realtime-2.1 is OpenAI’s reasoning model with tool use for low-latency voice agents and complex speech-to-speech workflows. It updates GPT-Realtime-2 with improved alphanumeric recognition, silence and noise handling, and interruption behavior, helping applications understand spoken code, manage imperfect audio, and respond more naturally when users pause or talk over the agent. Developers can configure reasoning effort to balance deeper thinking against latency and output usage, while strong instruction following helps the model stay aligned with a defined role, tone, and workflow. It accepts and produces both audio and text, can take images as input, and supports function calling so an agent can retrieve information or perform actions during a conversation. The model has a 128,000-token context window, supports up to 32,000 output tokens, and includes reasoning-token support for extended interactions.Starting Price: $0.40 per cached input -
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Miso TTS
Miso TTS
Miso Labs builds emotive foundation models for voice, designed to help developers create voice agents that feel fast, warm, and human instead of robotic or delayed. Its flagship model, Miso TTS, is an 8-billion-parameter transformer model for state-of-the-art emotive speech and dialogue generation, with open source weights available on Hugging Face and API access coming soon. Miso is built for real-time conversational voice, responding in 110ms to preserve natural flow and avoid the awkward pauses common in AI voice agents. It supports one-shot voice cloning, allowing users to clone a voice from a ten-second audio clip while keeping the agent’s voice consistent from the first second of a call to the last. Miso Labs also emphasizes local and sovereign deployment, with open source models built for local use and on-premises hosting and support available for enterprise teams that need to keep sensitive data in-house. -
35
Leadlock
Leadlock
Leadlock is a speech-to-speech voice AI platform built specifically for GoHighLevel agencies, helping them answer every call, qualify leads, book appointments, and update GHL pipelines in real time. Unlike traditional voice AI stacks that chain speech-to-text, an LLM, and text-to-speech, it supports true multimodal speech-to-speech through OpenAI Realtime and Gemini Live, alongside xAI Grok and ElevenLabs options, enabling sub-second latency, natural turn-taking, and interruptions. Agencies can choose from more than 72 voices across multiple providers and select different models for different agents and use cases. Native GoHighLevel integration connects contacts, calendars, pipelines, opportunities, tags, custom fields, workflows, and sub-accounts without middleware or Zapier-style glue. Before answering, agents can pull caller history and CRM context to personalize conversations from the first ring.Starting Price: $97 per month -
36
Google has released updated Gemini audio models that significantly expand the platform’s capabilities for natural, expressive voice interactions and real-time conversational AI with the introduction of Gemini 2.5 Flash Native Audio and improved text-to-speech technology. The updated native audio model powers live voice agents that can handle complex workflows, follow detailed user instructions more reliably, and maintain smoother multi-turn conversations by better recalling context from previous turns. It is now available across Google AI Studio,Gemini Enterprise Agent Platform, Gemini Live, and Search Live, enabling developers and products to build interactive voice experiences such as intelligent assistants and enterprise voice agents. In addition to the real-time voice improvements, Google enhanced the underlying Text-to-Speech (TTS) models in the Gemini 2.5 family to offer greater expressivity, tone control, pacing adjustments, and multilingual support.
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37
MAI-Voice-2.1
Microsoft
MAI-Voice-2.1 is Microsoft's hosted text-to-speech model for developers building voice-enabled products. It generates expressive speech from text, supports multilingual output across 23 languages, and offers emotion and style controls, long-form speaker consistency, and gated matching to consented reference voices. Developers access it through Microsoft Foundry and Azure Speech APIs and SDKs for narration, audiobooks, voice assistants, and customer-service experiences.Starting Price: $22/1M characters -
38
Grok Voice Think Fast 1.0
SpaceXSI
Grok Voice Think Fast 1.0 is an advanced voice AI model developed by xAI, designed to handle complex, real-world conversational workflows. It excels in multi-step tasks across customer support, sales, and enterprise applications. The model is built for fast, natural conversations while maintaining high accuracy and responsiveness. It supports real-time reasoning without adding latency, allowing it to process and respond intelligently during live interactions. Grok Voice can accurately capture and confirm structured data such as names, addresses, and account details, even in noisy or challenging conditions. It is optimized for global use with support for over 25 languages. The model is capable of handling interruptions, accents, and ambiguous inputs with ease. Overall, it enables businesses to deploy efficient, scalable voice agents for high-volume interactions. -
39
Cartesia Sonic-3
Cartesia
Cartesia Sonic-3 is a real-time, streaming text-to-speech (TTS) model designed to generate ultra-realistic, expressive voice output with extremely low latency, enabling AI systems to speak as fluidly as humans in live interactions. Built on advanced state space model architecture, Sonic delivers high-quality speech while achieving near-instant response times, with audio generation beginning in as little as 40–100 milliseconds, making conversations feel seamless rather than delayed. It is optimized for conversational AI use cases, acting as the “voice layer” for AI agents by converting text into natural-sounding speech that includes emotional nuance such as excitement, empathy, or even laughter. It supports more than 40 languages with native-level voices and accent localization, allowing developers to build globally accessible applications with consistent quality across regions.Starting Price: $4 per month -
40
Eleven v4
ElevenLabs
Eleven v4 is a text-to-speech model from ElevenLabs for generating expressive spoken audio from written scripts. It supports multi-speaker dialogue, emotional direction and audio-event tags, voice cloning, and consistent speaker identity across generated scenes. Creators, publishers, and production teams can use it for narration, audiobooks, character dialogue, video and game voiceovers, and multilingual projects. Developers can generate speech through the ElevenLabs web application or API; the related Eleven v4 Turbo model is intended for real-time speech and voice-agent scenarios. Eleven v4 supports 90+ languages. A free plan includes monthly credits for personal use, while paid plans provide higher credit limits and additional features.Starting Price: $0 -
41
KugelAudio
KugelAudio
KugelAudio is the most realistic speech AI platform, combining text-to-speech, speech-to-text, and voice-to-voice in one stack. With 39-50ms inference latency (lowest on the market), 30-second voice cloning, on-premises deployment, and industry-leading accuracy on email addresses, IBANs, and phone numbers, it's built for production voice applications where quality and compliance matter. It's a strong fit for voice bots and conversational agents that need to handle structured data without misreads, real-time applications requiring sub-50ms latency, and regulated industries like banking, insurance, healthcare, and the public sector that need on-premises or EU-sovereign deployment. Beyond enterprise voice automation, KugelAudio also powers branded voice experiences through natural cloning from 30 seconds of audio, multilingual products across over 30 languages German, English, French, and Italian, and media or content production needing the most realistic synthetic voices available.Starting Price: $1 -
42
MAI-Voice-2-Flash
Microsoft
MAI-Voice-2-Flash is Microsoft AI’s fast, efficient text-to-speech model for high-volume voice experiences where responsiveness is essential. It produces high-fidelity, natural, and expressive speech while preserving the prosody, acoustic quality, human-like rhythm, intonation, and emotional nuance of MAI-Voice-2. The model is optimized for real-time synthesis and runs twice as fast as MAI-Voice-2, making it suitable for voice agents, assistants, interactive applications, call centers, and IVR systems that must respond without noticeable delay. It supports 15 languages across 18 locales and includes a library of licensed, curated voices that can be used immediately. Developers can control speaking style and emotion through SSML, shaping delivery with expressions such as joy, excitement, empathy, sadness, whispering, or shouting to match different conversational situations and brand experiences. -
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Inworld TTS
Inworld
Inworld TTS is a state-of-the-art text-to-speech platform designed to deliver ultra-realistic, context-aware speech synthesis and precise voice-cloning capabilities at a radically accessible price. The flagship model, TTS-1, is optimized for real-time applications and supports low-latency streaming (first audio chunk in ≈200 ms) as well as multiple languages (including English, Spanish, French, Korean, Chinese, and more). Developers can use instant zero-shot voice cloning (5-15 seconds of audio) or professional fine-tuned cloning, add voice-tags for emotion, style, and non-verbal sounds, and switch languages while preserving voice identity. The larger TTS-1-Max model (in preview) offers even more expressive speech and multilingual strength. The platform supports both API and portal access, streaming or batch mode, and is designed for everything from interactive voice agents and gaming characters to branded audio experiences.Starting Price: $0.005 per minute -
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Gemini 2.5 Flash TTS
Google
Gemini 2.5 Flash TTS is the latest text-to-speech (TTS) model variant in Google’s Gemini 2.5 lineup, designed for faster, low-latency speech synthesis with expressive, controllable audio output. It offers significant enhancements in tone versatility and expressivity so that developers can generate speech that better matches style prompts, from storytelling narrations to character voices, with more natural emotional range. It features precision pacing, which allows it to adjust speech tempo based on context, delivering faster sections or slowing for emphasis more accurately according to instructions. It also supports multi-speaker dialogues with consistent character voices for scenarios like podcasts, interviews, or conversational agents, and improved multilingual handling so each speaker’s unique tone and style persist across languages. Gemini 2.5 Flash TTS is optimized for lower latency, making it ideal for interactive applications and real-time voice interfaces. -
45
Grok Text to Speech (TTS)
SpaceXSI
Grok Text to Speech (TTS) is a standalone audio API built to help developers generate fast, natural, and expressive speech from text. Built on the same stack that powers Grok Voice, Tesla vehicles, and Starlink customer support, the API makes it straightforward to integrate high-quality voice generation into applications such as voice agents, accessibility tools, podcasts, assistants, customer experiences, and interactive audio products. Grok TTS can turn long-form text into speech through a REST API or generate speech in real time through a WebSocket API, giving developers flexibility for both batch audio generation and live conversational experiences. It is designed around expressive delivery, not just flat narration, with fine-grained control through simple inline and wrapping speech tags. Developers can add natural prosody and emotion using tags, allowing lifelike delivery without complex markup. -
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Simba 3.2
Speechify
Speechify’s text-to-speech API offers a family of Simba models for real-time voice generation across English, European languages, and broader multilingual use cases. Simba 3.2 is recommended for new English integrations, providing streaming-native synthesis, the lowest time to first byte, richer expressivity than earlier generations, and full support for SSML and emotion control. Simba 3.0 extends streaming-native speech to English, German, Spanish, French, Italian, and Brazilian Portuguese, with language selection handled through the request or voice locale. Simba Multilingual supports 35 locales across 30 languages, including mixed-language content and automatic language detection, while Simba English remains available as a legacy model for compatibility. Developers select a model through one parameter and can switch without changing the rest of the request structure, including voice, format, and SSML settings. -
47
aiOla
aiOla
aiOla is a deep tech Conversational, Voice, and Speech AI lab with an enterprise-level automatic speech recognition (ASR) foundation model, Text-to-speech (TTS) technology and Natural Language Understanding (NLU). It’s designed to help enterprises and developers adapt speech technologies to any process, whether through seamless API integration or an intuitive in-house app. aiOla is revolutionizing enterprise operations with enterprise level Conversational AI. We specialize in speech-to-text and text-to-speech AI that deliver unmatched accuracy (95%), specialized in specific jargon, in any language, accent, vertical, or acoustic environment. From empowering frontline workers with hands-free workflows to enabling voice AI agents with enterprise-grade ASR and TTS, aiOla seamlessly integrates into workflows, internal apps and products. -
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Cartesia Ink 2
Cartesia
Ink 2 is Cartesia’s fastest, most accurate streaming speech-to-text model, built for production voice agents with the lowest word error rate and best turn detection of any streaming STT. It is designed to transcribe structured data such as phone numbers, dates, and emails correctly the first time, while also knowing when a speaker starts and finishes without requiring a separate voice activity detection system. Turn detection is built directly into the model, so voice agents can react to events instead of managing raw transcript segments. Ink 2 emits a full lifecycle of turn events, giving an agent clear signals for when to listen, interrupt, think, prepare a reply, cancel a premature response, or speak. The transcript property is cumulative within a turn, meaning each update contains the full text transcribed so far rather than a delta, and emitted text is final once sent. -
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EVI 3
Hume AI
Hume AI's EVI 3 is a third-generation speech-language model that streams in user speech and forms natural, expressive speech and language responses. At conversational latency, it produces the same quality of speech as our text-to-speech model, Octave. Simultaneously, it responds with the same intelligence as the most advanced LLMs of similar latency. It also communicates with reasoning models and web search systems as it speaks, “thinking fast and slow” to match the intelligence of any frontier AI system. EVI 3 can instantly generate new voices and personalities instead of being limited to a handful of speakers. For instance, users can speak to any of the more than 100,000 custom voices already created on our text-to-speech platform, each with an inferred personality. No matter the voice, it responds with a wide range of emotions or styles, implicitly or on command.Starting Price: Free -
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Gemini 3.8 Flash TTS
Google
Gemini 3.8 Flash TTS is Google’s expressive text-to-speech model for creating custom voices, directed performances, and multilingual audio experiences. The model can generate original voices from natural-language prompts by specifying characteristics such as role, accent, tone, pacing, and vocal style across more than 100 languages and dialects. Users can also replicate an authorized voice from a short audio sample, with consent verification, SynthID watermarking, and C2PA credentials supporting responsible voice creation. Gemini 3.8 Flash TTS provides line-by-line performance control, long-form speech generation, two-speaker scene staging, and support for nonverbal cues such as laughs, sighs, gasps, and conversational backchanneling. It is suited to use cases including games, audiobooks, podcasts, dubbing, interactive voice agents, branded audio, and media localization.
