Text to Speech is a speech synthesis API for voice agents and real-time applications.
Text to Speech is a speech synthesis API that streams natural-sounding voices for voice agents and real-time applications, initially offering English voices with additional languages planned as the line develops.
Introduced as a new product line complementing the company's speech recognition portfolio, it is available through a managed cloud service and in customer environments, letting teams combine synthesis with speech-to-text in a single conversational stack.
Cartesia
Cartesia Sonic
cartesia.ai
Deepgram
Deepgram Text-to-Speech
deepgram.com
ElevenLabs
ElevenAPI
elevenlabs.io
| Attribute | Text to Speech | Cartesia Sonic | Deepgram Text-to-Speech | ElevenAPI | |
|---|---|---|---|---|---|
| Provider |  | | | | |
| Founded | 2006 | 2023 | 2015 | 2022 | |
| Sells To | — | Enterprises | Enterprise, Small Business | B2B, B2C, Enterprises | |
| Pricing Model | Recurring Subscription | Recurring, Software | Recurring, Software, Usage-based | B2B Subscription, Recurring, Usage-based | |
| Ownership | Private | Private | Venture-backed | Private, Venture-backed |
Provider
Founded 2006
Sells To —
Pricing Model Recurring Subscription
Ownership Private
Provider
Founded 2023
Sells To Enterprises
Pricing Model Recurring, Software
Ownership Private
Provider
Founded 2015
Sells To Enterprise, Small Business
Pricing Model Recurring, Software, Usage-based
Ownership Venture-backed
Provider
Founded 2022
Sells To B2B, B2C, Enterprises
Pricing Model B2B Subscription, Recurring, Usage-based
Ownership Private, Venture-backed
AI voice generation platform for text-to-speech voiceovers, voice agents, and AI dubbing.
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Developer platform providing real-time and batch APIs for speech-to-text, text-to-speech, and voice agents.
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Deepgram's Speech-to-Text API is a conversational speech recognition service in real-time and pre-recorded modes.
Amazon Nova Sonic provides streaming speech-to-speech models for conversational applications and voice assistants.
AssemblyAI's Speech-to-Text API transcribes audio in streaming and pre-recorded modes with speaker diarization.
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OpenAI Realtime API provides conversational speech-to-speech models for developers building interactive voice agents.
Developer API for streaming real-time speech-to-speech translation and dubbing over WebSocket.
Outspeed Voice Platform provides realtime voice infrastructure for AI applications with natural prosody and ultra-low latency.
AI voice generation platform for text-to-speech voiceovers, voice agents, and AI dubbing.
Bland Speech provides developers with a text-to-speech studio and speech-generation API.
Developer platform providing real-time and batch APIs for speech-to-text, text-to-speech, and voice agents.
Speechify is an AI text-to-speech app that reads documents and articles aloud.
Deepgram's Speech-to-Text API is a conversational speech recognition service in real-time and pre-recorded modes.
Amazon Nova Sonic provides streaming speech-to-speech models for conversational applications and voice assistants.
Programmable voice APIs for making, receiving, and managing phone calls globally.
AssemblyAI's Speech-to-Text API transcribes audio in streaming and pre-recorded modes with speaker diarization.
Gemini Live API enables real-time voice and vision interactions through streaming conversational models.
OpenAI Realtime API provides conversational speech-to-speech models for developers building interactive voice agents.
Developer API for streaming real-time speech-to-speech translation and dubbing over WebSocket.
Outspeed Voice Platform provides realtime voice infrastructure for AI applications with natural prosody and ultra-low latency.
