Alternatives to Seeduplex
Compare Seeduplex alternatives for your business or organization using the curated list below. SourceForge ranks the best alternatives to Seeduplex in 2026. Compare features, ratings, user reviews, pricing, and more from Seeduplex competitors and alternatives in order to make an informed decision for your business.
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1
Amazon Polly
Amazon
Amazon Polly is a service that turns text into lifelike speech, allowing you to create applications that talk, and build entirely new categories of speech-enabled products. Polly's Text-to-Speech (TTS) service uses advanced deep learning technologies to synthesize natural sounding human speech. With dozens of lifelike voices across a broad set of languages, you can build speech-enabled applications that work in many different countries. In addition to Standard TTS voices, Amazon Polly offers Neural Text-to-Speech (NTTS) voices that deliver advanced improvements in speech quality through a new machine learning approach. Polly’s Neural TTS technology also supports two speaking styles that allow you to better match the delivery style of the speaker to the application: a Newscaster reading style that is tailored to news narration use cases, and a Conversational speaking style that is ideal for two-way communication like telephony applications. -
2
GPT-Live-1 mini
OpenAI
GPT-Live-1 mini is one of the two GPT-Live voice models rolling out to ChatGPT users globally, designed to bring more natural, intelligent, and responsive voice interaction to everyday conversations. Built with the same full-duplex approach as GPT-Live, it can listen and speak at the same time instead of waiting for rigid turn-by-turn exchanges. The model continuously processes input while generating output, allowing it to decide many times per second whether to speak, keep listening, pause, interrupt, or invoke a tool. This makes conversations feel faster, smoother, and more natural, with active listening, quick back-and-forth, better timing, and fewer awkward interruptions when the user pauses to think. GPT-Live-1 mini also benefits from the new ChatGPT Voice experience, where users can interrupt with a question, ask ChatGPT to slow down, or tell it to stay quiet and listen. -
3
GPT-Live
OpenAI
GPT-Live is a new generation of voice models for natural human-AI interaction, now powering ChatGPT Voice. It is built to make talking with AI feel much more like having a real conversation through a full-duplex architecture, meaning it can listen and speak at the same time. During conversations, GPT-Live can show it is paying attention with short acknowledgments like “mhmm” or “yeah,” engage in quick back-and-forth, or stay quiet when the user needs a moment to think. Instead of processing separate turns one after another, GPT-Live continuously processes input while generating output, allowing it to decide many times per second whether to speak, keep listening, pause, interrupt, or invoke a tool. For questions that require web search, deeper reasoning, or more complex work, GPT-Live can delegate to a frontier model behind the scenes and bring the result back into the conversation when it is ready, while still maintaining the flow of the voice interaction. -
4
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. -
5
Amazon Nova Sonic
Amazon
Amazon Nova Sonic is a state-of-the-art speech-to-speech model that delivers real-time, human-like voice conversations with industry-leading price performance. It unifies speech understanding and generation into a single model, enabling developers to create natural, expressive conversational AI experiences with low latency. Nova Sonic adapts its responses based on the prosody of input speech, such as pace and timbre, resulting in more natural dialogue. It supports function calling and agentic workflows to interact with external services and APIs, including knowledge grounding with enterprise data using Retrieval-Augmented Generation (RAG). It provides robust speech understanding for American and British English across various speaking styles and acoustic conditions, with additional languages coming soon. Nova Sonic handles user interruptions gracefully without dropping conversational context and is robust to background noise. -
6
Ekiga
Ekiga
Ekiga (formerly known as GnomeMeeting) is an open source SoftPhone, Video Conferencing and Instant Messenger application over the Internet. It supports HD sound quality and video up to DVD size and quality. Because it uses both of the major telephony standards (SIP and H.323), it is interoperable with many service providers and many types of hardware and software. Ekiga was first released back in 2001 under the GnomeMeeting name, as a graduation thesis. In 2001, voice over IP, IP Telephony, and videoconferencing were not widespread technologies as they are now. The GNU/Linux desktop was at its infancy, and let's not speak about multimedia capabilities. Most webcam drivers were buggy, ALSA had not been released yet and full-duplex audio was something difficult to achieve. General performance could also be an issue, especially when most efficient codecs were closed source. Generally speaking, the technology was not ready yet but Ekiga was already kicking! -
7
NeoSound
NeoSound Intelligence
NeoSound Intelligence is an AI tech company that turns emotions into actionable insights in order to create a world with better conversations between organizations and consumers. We intend to make all conversations better between consumers and organizations. By providing AI-powered speech analytics tools, we help call center companies to optimize their customer communication. Turn calls into revenue. Optimise customer communication by listening to customer calls automatically. NeoSound tools turn phone conversations into meaningful actionable insights to make customer communication better. NeoSound tools do not only speech-to-text translation. Smart algorithms do acoustics and intonation analysis. The machine listens to how people speak not only what they say. That is why our trained machines can easily address your company-specific needs. NeoSound offers a unique combination of speech-to-text semantic analytics and acoustic analysis of intonation. -
8
Azure Text to Speech
Microsoft
Build apps and services that speak naturally. Differentiate your brand with a customized, realistic voice generator, and access voices with different speaking styles and emotional tones to fit your use case—from text readers and talkers to customer support chatbots. Enable fluid, natural-sounding text to speech that matches the intonation and emotion of human voices. Tune voice output for your scenarios by easily adjusting rate, pitch, pronunciation, pauses, and more. Engage global audiences by using 400 neural voices across 140 languages and variants. Bring your scenarios like text readers and voice-enabled assistants to life with highly expressive and human-like voices. Neural Text to Speech supports several speaking styles including newscast, customer service, shouting, whispering, and emotions like cheerful and sad. -
9
Gemini Audio
Google
Gemini Audio is a set of advanced real-time audio models built on Gemini's architecture, designed to enable natural, fluid voice interaction and expressive audio generation through simple language prompts. It supports conversational experiences where users can speak, listen, and interact with AI in a seamless loop, combining understanding, reasoning, and response generation in audio form. It is capable of both analyzing and generating audio, allowing applications such as speech-to-text transcription, translation, speaker identification, emotion detection, and detailed audio content analysis. They are optimized for low-latency, real-time use cases, making them suitable for live assistants, voice agents, and interactive systems that require continuous, multi-turn dialogue. Gemini Audio also integrates advanced capabilities like function calling, enabling the model to trigger external tools and incorporate real-time data into responses.Starting Price: Free -
10
iSpeech Translator
iSpeech
Speak and translate any words or phrases including email or text in multiple languages with iSpeech Translator™. The app's human-quality text to speech and speech recognition are brought to you by iSpeech®, the creator of DriveSafe.ly®, award-winning leader in texting while driving applications. Speak or type any phrase and listen to the corresponding translation in your choice of language. -
11
GPT‑Realtime‑Whisper
OpenAI
GPT-Realtime-Whisper is OpenAI’s streaming transcription model built for low-latency speech-to-text experiences in live products. It transcribes audio as people speak, helping voice-enabled apps feel faster, more responsive, and more natural, from captions that appear in the moment to meeting notes that keep up with the conversation. It makes live speech usable inside business workflows as it happens, so teams can power captions for meetings, classrooms, broadcasts, and events, generate notes and summaries while conversations are still in progress, build voice agents that need to understand users continuously, and create faster follow-up workflows for high-volume spoken interactions. It is part of a new generation of real-time voice models in the API that can reason, translate, and transcribe as people speak, moving real-time audio beyond simple call-and-response toward voice interfaces that can listen, translate, transcribe, and take action as a conversation unfolds.Starting Price: $0.017 per minute -
12
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. -
13
TML-interaction-small
Thinking Machines Lab
TML-Interaction-Small is a real-time multimodal interaction model developed by Thinking Machines Lab to enable more natural and collaborative human-AI communication across audio, video, and text. Unlike traditional turn-based AI systems that rely on external scaffolding and delayed interactions, TML-Interaction-Small is designed around continuous micro-turn exchanges that allow the model to perceive, respond, listen, speak, and react simultaneously in real time. The model uses a time-aware architecture that processes 200ms interaction windows, enabling seamless interruptions, simultaneous speech, visual cue detection, and live collaborative workflows without requiring separate dialog management systems. TML-Interaction-Small supports capabilities such as real-time conversation, proactive interjections, live translation, visual monitoring, tool usage, browsing, and asynchronous reasoning through coordination with a background model. -
14
TextAloud
NextUp Technologies
TextAloud 4 converts text from documents, webpages, PDF files and more into natural-sounding speech. Listen on your PC or create audio files. Text to Speech software for the Windows PC that converts your text from documents, email and webpages into natural-sounding speech. Optional premium voices offer an incredible variety of languages and accents. Struggling readers find listening to their reading can improve comprehension. Word highlighting in TextAloud helps strengthen recognition when you follow along. Helps those dealing with Dyslexia, ADD, and also low vision. TextAloud has built in extensions for the Chrome web browser and Microsoft Word. A floating toolbar lets TextAloud speak selected text from any window. Users of online save-for-later services Pocket and Instapaper can import bookmarked articles into TextAloud. TextAloud can save your daily reading to audio files for listening anywhere.Starting Price: $34.95 one-time payment -
15
Lemon
Lemon
Lemon is an AI voice agent designed to turn natural speech into completed tasks across any application, enabling users to execute work without typing or switching between tools. It operates through a simple interaction model where users press a key, speak their intent, and the system carries out actions such as replying to messages, drafting documents, performing research, or delegating tasks directly within their current workflow. Unlike traditional voice-to-text tools, Lemon focuses on “voice-to-action,” meaning it interprets intent and produces finished outputs rather than just transcribing speech. It is built to eliminate context switching, allowing users to stay in the same tab while interacting with emails, documents, or other apps, significantly reducing interruptions and improving focus. It supports features such as instant search, document creation, tone editing, ideation, and dictation, functioning as a second brain that accelerates everyday knowledge work. -
16
Phonic
Phonic
Take surveys to the next level. Beautiful, intelligent questionnaires answered with voice and video. Get better answers, faster. Respondents give 3x longer and 2x more descriptive feedback when answering with voice instead of text. Watch and listen to users as they interact with products. Save time and scale your research by taking the interviewer out of structured interviews. Supercharge your feedback. Start listening to tone and understand how users really feel. Voice makes it easy to distinguish between authentic and disingenuous responses. Unlock voice insights. Transcription. 32 supported languages, transcribed in minutes. Sentiment Analysis. Sort by emotion to find the the most positive and negative responses. Emotional Classification. Classification into distinct emotions. Cadence and Energy. Record speaking energy and word rates in every response. Integrate everywhere. Phonic plugs into everything from survey software to websites and more. Export data -
17
beepbooply
beepbooply
beepbooply is an online text-to-speech AI voice generator that lets users convert written text into realistic, natural-sounding audio with a click. Choose from over 900 voices across 80+ languages and create audio content for voiceovers, podcasts, videos, customer service, social media, training materials, and other personal or commercial projects. It uses cutting-edge AI voices designed to produce natural and realistic speech patterns, with voice models provided by Google, Microsoft, and Amazon. The workflow is simple, choose a voice, input the text you want to convert to speech, generate the audio, then listen to it, save it, and download it. Each language offers multiple voices with their own sound, and users can mix and match different voices to find the right tone for each project. beepbooply also includes customization options such as pacing, pitch, volume, and speaking styles, helping users shape the voice to fit the content.Starting Price: $7 per month -
18
SpeakPipe
SpeakPipe
SpeakPipe allows your listeners to send you voice messages directly from your website or voicemail page. You can include received messages in your podcast episodes. Want to ask your audience a question for an upcoming podcast episode? Record a short voice message on SpeakPipe and share it with listeners. This allows them to listen to your question and send you a voice reply. A recording can be sent with just a few clicks without typing anything. Listeners have the option to enter their contact information before uploading a message. All messages are stored in your account, so you can access them at any time.Starting Price: $12 per month -
19
UnicTool VoxMaker
UnicTool
With voice cloning, your favorite characters say anything you want. Use UnicTool VoxMaker, gone are the days of robotic and monotonous voiceovers. Supports 70+ languages and accents, making it a useful tool for people who need to communicate or interact with others who speak different languages. AI voice cloning is great for content creators looking to add a unique touch to their videos and for fans looking to experience their favorite characters in a whole new way. Speed, tone, volume, pitch, and accent of the generated speech, which can be useful for personalizing the listening experience are supported to adjust as you want. -
20
Knovvu Speech Recognition
Sestek
Automate customer processes, evaluate agent performances objectively and ensure your operations are 100% efficient. In our connected world, many consumers are interacting with everyday connected appliances in new ways. With a trend in connected devices that often lack a screen, speech is emerging as a natural, intuitive interface for human-machine interaction. Speech recognition is the driving technology behind this development, revolutionizing the way people interact with their devices. With Knovvu Speech Recognition from Sestek, machines and applications can understand user commands in spoken language. With the ability to listen to and interpret spoken demands, users may interact with these devices by speaking aloud rather than inputting buttons and keystrokes. Our automatic speech recognition software has full application. Many organizations use technology to power intuitive and straightforward self-service solutions. -
21
CCR2004-16G-2S+PC
MikroTik
Like the other models in CCR2004 series, this CCR also features the Amazon Annapurna Labs Alpine v2 CPU with 4x 64-bit ARMv8-A Cortex-A57 cores. While this CPU is running at 1.2 GHz, the router can be 3x as fast than the previous generation CCR’s. This is the silent powerhouse. Enjoy all the power of a real CCR in peace and quiet. Get rid of all the hum and buzz in your office, studio, server room or homelab without sacrificing the performance! The new router has 18 wired ports, including 16x Gigabit Ethernet ports and two 10G SFP+ cages. It also has a RJ-45 console port on the front panel. Each group of 8 Gigabit Ethernet ports is connected to a separate Marvell Amethyst family switch-chip. Each switch chip has a 10 Gbps full-duplex line connected to the CPU. The same goes for each SFP+ cage - a separate 10 Gbps full-duplex line. Boards come with 4GB of DDR4 RAM and 128MB of NAND storage.Starting Price: $465 one-time payment -
22
TTSReader
TTSReader
Includes multiple languages and accents, if on Chrome, you will get access to Google's voices as well. Super easy to use, no download, no login required. Drag, drop & play (or directly copy text & play). Simply fun to use and listen to great content. Great for listening in the background. Great for proof-reading, great for kids and more. We facilitate high-quality natural-sounding voices from different sources. There are male & female voices, in different accents and different languages. Choose the voice you like, insert text, click play to generate the synthesized speech and enjoy listening. TTSReader remembers the article and last position when paused, even if you close the browser. This way, you can come back to listening right where you previously left. Works on Chrome & Safari and on mobile too. Ideal for listening to articles. TTSReader enables exporting the synthesized speech with a single click.Starting Price: $8.25/month -
23
Amazon Nova 2 Sonic
Amazon
Nova 2 Sonic is Amazon’s real-time speech-to-speech model designed to deliver natural, flowing voice interactions without relying on separate systems for text and audio. It combines speech recognition, speech generation, and text processing in a single model, enabling smooth, human-like conversations that can shift effortlessly between voice and text. With expanded multilingual support and expressive voice options, it produces responses that sound more lifelike and contextually aware. Its one-million-token context window allows for long, continuous interactions without losing track of prior details. It supports asynchronous task handling, meaning users can continue speaking, change topics, or ask follow-up questions while background tasks, such as searching for information or completing a request, continue uninterrupted. This makes voice experiences feel more fluid and less bound by traditional turn-based dialog constraints. -
24
Polyglotta
Polyglotta
Polyglotta is a multilingual translation and language learning platform that lets users translate text into more than 70 languages and view results side by side so they can see how phrases, grammar, and nuance compare across linguistic contexts, helping deepen understanding rather than delivering a single generic translation. It supports instant multilingual translation, real-time language auto-detection, and an interactive “Chat” mode where users can converse with an AI language partner across multiple languages with contextual responses, stored chats, and conversational history. It also includes high-quality AI-generated audio pronunciation in multiple voices to aid listening and speaking practice, and features like achievements, streaks, and community engagement that motivate continued learning and exploration of languages in a shared environment.Starting Price: $5 per month -
25
Vision Agents
Stream
Vision Agents is an open source Python framework for building low-latency voice and video AI agents with any model. It lets developers plug in LLM, speech, and vision models from more than 25 providers and ship real-time agents for telehealth, voice support, live coaching, video analysis, interactive avatars, security monitoring, sports commentary, and other multimodal applications. It is designed to help teams build agents that can listen, speak, see, process media, call tools, and respond in real time while running on Stream’s global edge network with sub-500ms latency. Developers can build a first agent in minutes, using a small Python setup with Gemini Realtime, OpenAI, Deepgram, ElevenLabs, Stream, or other supported providers. Vision Agents supports both real-time speech-to-speech models and custom STT/LLM/TTS pipelines, giving teams either the fastest path to a working voice agent or full control over speech recognition, language reasoning, text-to-speech, etc.Starting Price: Free -
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Babelbeez
Babelbeez
Babelbeez is a browser-native voice AI designed to function as an automation trigger. It allows website visitors to speak naturally with an AI agent via WebRTC, while simultaneously extracting structured data from the conversation to power your backend workflows. Powered by the OpenAI Realtime API, Babelbeez enables low-latency, interruptible speech-to-speech interactions directly in the browser, eliminating the need for phone numbers or SIP infrastructure. Beyond answering customer queries using your automatically generated knowledge base (RAG), the Babelbeez Entity Extraction Engine identifies key data points—such as intents, contact details, or scheduling preferences—and pushes them as clean JSON payloads to your stack via secure HMAC-signed webhooks.Starting Price: $39/month -
27
Gemini 3.5 Live Translate
Google
Gemini 3.5 Live Translate is Google’s latest audio model for live speech-to-speech translation, delivering near real-time translation in more than 70 languages. The model automatically detects multilingual input and generates smooth, natural-sounding translated speech that preserves the speaker’s intonation, pacing, and pitch. Unlike turn-by-turn translation systems that wait for someone to finish speaking before responding, Gemini 3.5 Live Translate processes speech as it streams and generates translated audio continuously, balancing the need for context with the need to stay in sync. It stays only a few seconds behind the speaker throughout a session, helping conversations feel more fluid and natural, without awkward pauses. It is built for multilingual calls, meetings, lessons, broadcasts, live interpretation, dubbing, simultaneous translation, and voice translation applications. -
28
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 -
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Qwen3-TTS
Alibaba
Qwen3-TTS is an open source series of advanced text-to-speech models developed by the Qwen team at Alibaba Cloud under the Apache-2.0 license, offering stable, expressive, and real-time speech generation with features such as voice cloning, voice design, and fine-grained control of prosody and acoustic attributes. The models support 10 major languages, including Chinese, English, Japanese, Korean, German, French, Russian, Portuguese, Spanish, and Italian, and multiple dialectal voice profiles with adaptive control over tone, speaking rate, and emotional expression based on text semantics and instructions. Qwen3-TTS uses efficient tokenization and a dual-track architecture that enables ultra-low-latency streaming synthesis (first audio packet in ~97 ms), making it suitable for interactive and real-time use cases, and includes a range of models with different capabilities (e.g., rapid 3-second voice cloning, custom voice timbres, and instruction-based voice design).Starting Price: Free -
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@Voice Aloud Reader
Hyperionics
@Voice Aloud Reader reads aloud the text displayed in an Android app, e.g. web pages, news articles, long emails, sms, PDF files and more. Save articles opened in @Voice to files for later listening. Construct listening lists of many articles for uninterrupted listening one after the other. Order the list as needed, e.g. more important articles first. Pause/resume speech as needed with wired or Bluetooth headset buttons, plus click next/previous buttons to jump by sentence, long-click to switch to the next/previous article on a list. Options for additional pause between paragraph, start talking as soon as a new article is loaded or wait for a button press, start/stop talking when wired headset plug is inserted/removed. -
31
GSpeech
GSpeech
GSpeech is an AI-powered text-to-speech solution that seamlessly converts website content into natural-sounding audio, enhancing user engagement and accessibility. Supporting over 230 voices across 76 languages, it allows users to select preferred languages and voices, with options to adjust speed and pitch for a personalized listening experience. It offers various player types, including full-page, button, and circle players, which can be easily embedded into any HTML website. GSpeech's neural technology generates audio with humanlike intonation, making content more engaging and interactive. It also provides features like welcome messages, speaking links, and customizable text-to-audio players to suit different website aesthetics. By implementing GSpeech, websites can improve their SEO rankings, increase traffic, and offer an inclusive experience for users with visual impairments or those who prefer auditory content. Starting Price: $9.99 per month -
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Good Vibrations Company (GVC)
Good Vibrations Company
In many GVC applications the first step of the process is emotion recognition: the user speaks for a few seconds, and the GVC Emotion Recognition algorithm measures hundreds of acoustic properties of the user’s voice and distills from these cues an assessment of the user’s emotional state. We can feed the results from our emotion recognition algorithm into algorithms that choose an appropriate feedback to the user. As GVC we are primarily interested in kinds of feedback that improve the user’s performance and quality of life. Measuring the signals provided by the user’s voice, heart, lungs or other organs. The GVC Concept has been implemented in several demo apps. These employ a suite of proprietary algorithms that analyse many facets of the user’s speech, such as the GVC Emotion Recognition and GVC Voice Disorder Detection algorithms. -
33
Freeway
Synthiblab OU
Freeway is a free, privacy-first voice-to-text app for Mac that lets you turn speech into text anywhere you're typing. Just press a hotkey, start talking, and Freeway transcribes your speech in real time. When you release the key, the text is automatically inserted exactly where your cursor is — in any app, any website, any text field. No switching windows, no copy-paste, no interruptions to your flow. Speaking is up to 4× faster than typing, which means ideas move from your mind to the screen at the speed they appear. Whether you're writing emails, messages, notes, documents, or forms, Freeway removes friction and keeps you in motion. -
34
Caddie
Caddie
Caddie is an AI copilot for every call, built as a notetaker that speaks and sells. It joins sales calls, listens in real time, recalls the right fact from the team’s knowledge base, and answers live, so reps do not have to say “let me get back to you” when a prospect asks about pricing, integrations, recent numbers, product details, or anything else that should already be in the company’s materials. Caddie pulls docs, the website, pricing, and emails into a private knowledge base, then answers questions grounded only in that content, with no guessing. It is designed to know the numbers cold, sound like the best rep, and keep the conversation moving while the seller stays focused on the prospect. When a rep hesitates, Caddie can quietly supply the right fact, leading with “Just to add—,” and it only speaks when it genuinely adds value. It can also fact-check the call in real time, correcting misremembered numbers or prospect misunderstandings before they stick. -
35
Realtime TTS-2
Inworld
Realtime TTS-2 from Inworld AI is a new generation of voice model built for real-time conversation: a voice model that feels as human as it sounds. It hears the full audio of an exchange, picks up the user’s tone, pacing, and emotional state, then takes voice direction in plain English, the way developers prompt an LLM. Instead of generating speech in isolation, it listens to prior turns of the exchange, so tone and pacing carry forward, and the same line can land differently after a joke than after bad news. Voice Direction lets developers steer delivery like a director would steer a voice actor, using natural-language descriptions rather than fixed emotion presets or sliders. Inline nonverbals like [sigh], [breathe], and [laugh] can be placed inside the text, and the model renders them as audio events. Realtime TTS-2 preserves one voice identity across more than 100 languages, including mid-utterance language switches.Starting Price: $25 per month -
36
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 -
37
Rossy AI
Rossy AI
Rossy AI is a smart AI voice agent platform built to handle incoming business calls with natural, human-like conversation. It speaks directly with callers to answer questions, confirm details, book appointments, and collect lead information without delays or interruptions. Instead of relying on staff to manage every call, Rossy AI takes care of routine phone interactions smoothly and professionally, ensuring callers always feel heard. It helps businesses stay available at all times, reduces missed calls, and keeps communication consistent even during busy hours or after office time. With clear speech and realistic responses, Rossy AI creates a reliable calling experience that feels personal while saving time, improving efficiency, and allowing teams to focus on more important tasks. -
38
Blakify
Blakify
Take your business to the next level with cutting-edge text-to-speech technology. Choose from a growing library of 700+ voices that speak in 70 different languages and accents, powered by artificial intelligence. The next time you need a voice to talk about your company or brand, why not give it some personality? With this AI voice generator and the best synthetic voices from Google, Amazon, IBM & Microsoft. You can generate realistic text-to-speech audio using the online website in seconds. From there, download mp3 files and WAV format, which play on any device. With our TTS service, you can have your message delivered in over 60 languages. We offer voices for every occasion, from calm and professional to passionate or excited, all at the touch of a button! Explore the many ways in which it can be used, from reading important announcements aloud or listening when you're traveling abroad with your device, all while saving time and money.Starting Price: $29.99 per month -
39
iSpeech Dictation
iSpeech
Speak any message and iSpeech Dictation™ will put it into text format. Dictate using BlackBerry Messenger (BBM), text (SMS), email, or voice notes into text and send. The app's human-quality speech recognition is brought to you by iSpeech®, the creator of DriveSafe.ly®, award-winning leader in texting while driving applications. Speak any phrase or message and iSpeech Dictation™ will translate it into text. Talk and type. -
40
Transync AI
Transync AI
Transync AI is an AI-powered translation and interpretation tool built to enable real-time, multilingual conversation across platforms, whether for meetings, calls, travel, or daily interactions. It uses end-to-end speech recognition, neural translation, and natural voice synthesis to provide two-way, live voice translation with very low latency (on average under 0.5 seconds), letting participants speak naturally while hearing or seeing the translation almost instantly. It supports more than 60 languages and offers a dual-screen interface showing both the original speech and the translation side-by-side, aiding clarity and comprehension. Transync AI also includes speaker-recognition and language-detection, so it can automatically identify who is talking (and in what language) and deliver appropriate translations without manual configuration. After conversations conclude, the platform can generate full transcripts and AI-written meeting summaries in multiple languages.Starting Price: $8.99 per -
41
Gemini Live API
Google
The Gemini Live API is a preview feature that enables low-latency, bidirectional voice and video interactions with Gemini. It allows end users to experience natural, human-like voice conversations and provides the ability to interrupt the model's responses using voice commands. The model can process text, audio, and video input, and it can provide text and audio output. New capabilities include two new voices and 30 new languages with configurable output language, configurable image resolutions (66/256 tokens), configurable turn coverage (send all inputs all the time or only when the user is speaking), configurable interruption settings, configurable voice activity detection, new client events for end-of-turn signaling, token counts, a client event for signaling the end of stream, text streaming, configurable session resumption with session data stored on the server for 24 hours, and longer session support with a sliding context window. -
42
Rubidium
Rubidium
Rubidium enables leading companies to embed voice commands and text to speech in their products. Voice Trigger is an “always on” engine that continuously listens and wakes up when you say the proper “magic word”. Voice Trigger identification uses a sophisticated miniature footprint Automatic Speech Recognition (ASR) engine to run in the background and distinguish between the trigger phrase and the rest of the speech, sounds and noise. Automated Speech Recognition (ASR) easily and safely controls any set of functions through voice commands. For example: call acceptance and rejection, device setup and installation procedure (pairing, calibration, interconnection, etc.), voice dialing, music streaming control and music selection. Rubidium technology is now embedded in over 50 million consumer products with customers and partners including leading global brands such as RIM (Blackberry), GN Netcom (Jabra), Panasonic, Uniden, CSR, Mattel, General Motors, Electrolux and many others. -
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Kippy
Kippy
It's difficult to find the time for a lesson, with Kippy, you can practice speaking anytime, anywhere. Reminders will help you to make it a daily habit. Tutors and lessons can be expensive. Kippy is powered by advanced conversational AI. It costs 93% less compared to language lessons. When you are unsure or make a mistake, Kippy will help you to speak accurately and with confidence. Most language apps teach you boring phrases that you will rarely need in a real-world conversation. Kippy helps you practice and role-play many useful scenarios. It has your back from preparing for a job interview to shopping on your overseas holidays. As you listen, each word is highlighted to reinforce your learning by associating each word with its pronunciation. You can change the speed of speaking or try different types of voices to enhance your listening abilities further.Starting Price: Free -
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Talk FREE
Talk FREE
With Talk, your phone will speak what you type. Make your phone say anything you want in many languages! Let your phone read the news for you! It supports importing web pages directly from the browser to listen to them. You can also import text from any other apps. Helpful for people that had wisdom teeth removed. Helpful for speech impaired people. Helpful for visually impaired people. -
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WorkinTool TransAI
WorkinTool
This instant language translation app can listen to and translate various languages, whether a single sentence or a long conversation. Get instant and highly accurate translation with its artificial intelligence technology. TransAI is an ideal AI-powered real-time voice translator that allows students, travelers, business people, technical staff and others to learn, read, and speak in all mainstream languages worldwide. A real-time voice translator can help you communicate with locals, navigate public transportation, and order food at restaurants in a country where you don't speak the language. An instant voice translator can help you overcome language barriers and liaise with your colleagues in business meetings or with clients more effectively if you work in a multinational company that specializes in cross-border commerce. A speak & translate app can help you practice speaking and improve your pronunciation when you are learning a new language. -
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Big Speak
Big Speak
It doesn't matter if you are developing a voice chatbot or if you are using a cool text-to-speech app like Speak.ai. It's crucial that the final result does not sound like just words thrown together. Voice and tone are more important than words. Or, to put it this way, the tone, pauses, and speech tempo will help your words make an impact. And if we agree that not just what you say matters, but also how you say it, it's obvious why SSML has become a thing. Here’s a list of 4 Markups that will help you give a human touch to your computer-generated voice. To help you better connect to the client, friend, partner, or web surfer that interacts with your work. We all know a great story-teller. A person that has the power to use words that simply lift us from the chair and put us into the middle of the action. A person that right before the peak of the story makes a pause that makes want to shout "and then what happened?" Because you know that something important is about to happen.Starting Price: Free -
47
AIdeaFlow Podcast
AIdeaFlow Podcast
AIdeaFlow Podcast is an innovative platform that transforms any text into engaging AI-powered podcasts with natural conversations in multiple languages. Users can choose from over 120 lifelike voices across various languages, ensuring natural-sounding dialogues that captivate listeners. It offers flexible generation options, allowing selection among multiple AI models, standard quality (tts-1), enhanced quality (tts-1-hd), or the premium WorldSpeak model, with content lengths ranging from 3,000 to 30,000 characters, depending on the chosen plan. AIdeaFlow supports instant podcast generation, enabling users to produce professional-quality content in seconds, and facilitates global content creation by maintaining natural speech patterns and cultural nuances across different languages. Advanced features include personalized voice design for enterprise users, natural AI podcast conversations between multiple speakers, multiple format options, etc.Starting Price: $8.25 per month -
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MAI-Transcribe-1
Microsoft AI
MAI-Transcribe-1 is a state-of-the-art speech-to-text model developed by Microsoft and available through Azure AI Foundry, designed to deliver high-accuracy transcription for real-world audio across enterprise and developer use cases. It supports 25 major languages and is optimized to handle diverse accents, dialects, and speaking styles, maintaining consistent performance even in challenging conditions such as background noise, low-quality recordings, or overlapping speech. It is built by Microsoft’s AI Superintelligence team with a dual focus on accuracy and efficiency, enabling fast batch transcription and scalable deployment for production environments. MAI-Transcribe-1 powers a wide range of applications, including meeting transcription, live captions, accessibility tools, call center analytics, and voice-driven agents, making it a foundational component for voice-enabled systems.Starting Price: Free -
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Socket.IO
Socket.IO
In most cases, the connection will be established with WebSocket, providing a low-overhead communication channel between the server and the client. Rest assured! In case the WebSocket connection is not possible, it will fall back to HTTP long-polling. And if the connection is lost, the client will automatically try to reconnect. Scale to multiple servers and send events to all connected clients with ease. Socket.IO is a library that enables low-latency, bidirectional and event-based communication between a client and a server. It is built on top of the WebSocket protocol and provides additional guarantees like a fallback to HTTP long-polling or automatic reconnection. WebSocket is a communication protocol that provides a full-duplex and low-latency channel between the server and the browser. There are several Socket.IO server implementations available. And client implementations in most major languages. -
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AnyToSpeech
AnyToSpeech
AnyToSpeech is a text-to-speech online platform built to convert any text into audio instantly, creating audiobooks, MP3 files, podcasts, and voiceovers effortlessly. It turns plain text, documents, PDFs, DOCX, TXT files, webpages, PowerPoint presentations, images, and more into natural-sounding audio with multiple AI voices, accents, tones, and vibes. Users can quickly turn any text into a human-like voice through a simple interface, choose from hundreds of different voice and vibe combinations, and download the result as an MP3 file or listen directly in the browser. AnyToSpeech also includes PDF to MP3 for transforming documents, books, and research papers into audio content; URL to Speech for listening to articles and blogs on the go; Image to Speech for extracting text from signs, documents, screenshots, and images; and Image Translation for extracting text from images, translating it to 30+ languages, and converting the translation to speech.Starting Price: $7 per month
