Async vs. Synthesys Comparison


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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.	About Synthesys is on the leading edge of developing algorithms for text to voice and videos for commercial use. Imagine being able to enhance your website explainer videos or product tutorials in a matter of minutes with the aid of a natural human voice. Synthesys Text-to-Speech (TTS) and Synthesys Text-to-Video (TTV) technology transform your script into vibrant and dynamic media presentations. Using clear, natural voiceovers brings trust and authority to your digital message, creating a relatable and emotional connection between your customers and your brand. With the power of Synthesys AI voice generator, you can make the jump from plain old text to dynamic and engaging digital content.
Platforms Supported Windows Mac Linux Cloud On-Premises iPhone iPad Android Chromebook	Platforms Supported Windows Mac Linux Cloud On-Premises iPhone iPad Android Chromebook
Audience Developers wanting a tool to get natural voice generation and cloning for apps	Audience Organizations interested in a powerful AI text-to-speech and text-to-video solution
Support Phone Support 24/7 Live Support Online	Support Phone Support 24/7 Live Support Online
API Offers API	API Offers API
Screenshots and Videos View more images or videos	Screenshots and Videos View more images or videos
Pricing $1 per hour Free Version Free Trial	Pricing $19 per month Free Version Free Trial
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	Reviews/Ratings Overall 3.3 / 5 ease 4.0 / 5 features 3.0 / 5 design 3.7 / 5 support 3.3 / 5 Read all reviews
Training Documentation Webinars Live Online In Person	Training Documentation Webinars Live Online In Person
Company Information Async United States async.ai/	Company Information Synthesys AI Studio Founded: 2019 United Kingdom synthesys.io
Alternatives smallest.ai	Alternatives Synthesia
Fish Audio Hanabi AI	CreateAIvoiceovers The Seaplace Group, LLC
Resemble AI	D-ID
AnyVoice	ElevenLabs
ReadSpeaker View All	Play.ht View All
Categories AI Voice Generators Podcast Editing Text to Speech Voice Cloning	Categories AI Art Generators AI Avatar Generators AI Image Generators AI Tools AI Translation AI Video Generators (Text-to-Video) AI Voice Generators Digital Human Dubbing Text to Speech Video Translation Voice Cloning Voice Over
	Text to Speech Features Adjust Speaking Rate / Pitch API Audio Optimization Custom Lexicons Different Voice Choices Multi-Language Support Synchronize Speech
Integrations ChatGPT Plus ChatGPT Pro JavaScript Podcastle Python Twilio View All 4 Integrations	Integrations ChatGPT Plus ChatGPT Pro JavaScript Podcastle Python Twilio View All 2 Integrations
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