Async Gradium

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Async:

About

Async is a developer-first AI voice platform, rooted in technology that powers Podcastle, offering premium text-to-speech and voice cloning via a simple, high-performance API. Developers gain access to broadcast-quality, natural-sounding voices with under-200 ms latency, and can create personalized voice clones using just a three-second audio sample. It supports streaming output so audio plays as it’s generated, and offers transparent usage-based billing with real-time daily stats and per-second cost control. Built to scale from prototypes to full production, Async makes advanced voice capabilities accessible to indie developers and enterprises alike, backed by the same trusted infrastructure that fueled Podcastle.
Gradium:

About

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.
Async:

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported
Gradium:

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported
Async:

Audience

Developers wanting a tool to get natural voice generation and cloning for apps
Gradium:

Audience

Developers and organizations building voice-enabled applications, conversational agents, and speech workflows, including enterprise teams.
Async:

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported
Gradium:

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported
Async:

API

Offers API Supported
Gradium:

API

Offers API Supported
Async:

Screenshots and Videos

Gradium:

Screenshots and Videos

No images available
Async:

Pricing

$1 per hour
Free Version Supported
Free Trial Not Supported
Gradium:

Pricing

$0/month
The free tier includes 45,000 credits. The XS plan is $13/month and includes 225,000 credits. Credits are shared across speech services; monthly plan credits do not roll over. Annual billing saves one month.
Free Version Supported
Free Trial Not Supported
Async:

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software
Gradium:

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software
Async:

Training

Documentation Supported
Webinars Not Supported
Live Online Supported
In Person Not Supported
Gradium:

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported
Async:

Company Information

Async
United States
async.ai/
Gradium:

Company Information

Gradium
Founded: 2025
France
gradium.ai/
Async:

Alternatives

Gradium:

Alternatives

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Gradium:
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Gradium:
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Murf AI

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Async:

Categories

Podcast Editing Supported
Text to Speech Supported
Voice Cloning Supported
Gradium:

Categories

Async:

Integrations

Eden AI Not Supported
JavaScript Supported
LiveKit Not Supported
Pipecat Not Supported
Podcastle Supported
Python Supported
Twilio Supported
Gradium:

Integrations

Eden AI Supported
JavaScript Not Supported
LiveKit Supported
Pipecat Supported
Podcastle Not Supported
Python Not Supported
Twilio Not Supported
Async:
Claim Async and update features and information
Claim Async and update features and information
Gradium:
Claim Gradium and update features and information
Claim Gradium and update features and information