API DIRECTORY · AI MEDIA, LANGUAGE AND SCIENCE

AI — Speech, Voice & Audio

42 companies and tools in this category. Each listing links to the provider’s own website. Search the full directory

Amazon PollyHosted API
STT and TTS
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-23
Amazon TranscribeHosted API
STT and TTS
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-23
AssemblyAIHosted API
Speech transcription
Get an API key Docs Pricing Status Details
Official source checked · checked 2026-10-23
Azure AI SpeechHosted API
STT, TTS, translation
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-23
Bland AIHosted API
Voice-agent phone platforms
Open documentation Pricing Status Details
Official source checked · checked 2026-10-23
CartesiaHosted API
Speech synthesis and voice-model APIs
Open documentation Pricing Status Details
Official source checked · checked 2026-10-23
Coqui XTTSSDK/library
Downloadable TTS
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-23Programming library or SDK; no hosted API key is implied.
DeepgramHosted API
Speech recognition and voice
Set up API access Docs Pricing Status Details
Official source checked · checked 2026-10-23
DemucsSDK/library
Stem separation
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-23Programming library or SDK; no hosted API key is implied.
ElevenLabsHosted API
Voice generation services
Get an API key Docs Pricing Status — No status page listedDetails
Official source checked · checked 2026-10-23
faster-whisperSDK/library
Downloadable STT
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-23Programming library or SDK; no hosted API key is implied.
GladiaHosted API
Speech transcription and audio intelligence APIs
Open documentation Pricing Status Details
Official source checked · checked 2026-10-23
Google Cloud Speech-to-TextHosted API
STT and TTS
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-23
Google Cloud Text-to-SpeechHosted API
STT and TTS
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-23
Hume AIPartner access
Expressive speech and voice interaction APIs
Open documentation Pricing — No pricing page listedStatus Details
Official source checked · checked 2026-10-23Provider approval or a commercial agreement may be required.
Inworld AIHosted API
Voice and real-time conversational AI APIs
Open documentation Pricing Status — No status page listedDetails
Official documentation checked · checked 2026-10-23
KokoroSDK/library
Downloadable TTS
Open documentation Pricing — No pricing page listedStatus Details
Official source checked · checked 2026-10-23Programming library or SDK; no hosted API key is implied.
LALAL.AIHosted API
Stem separation
Open documentation Pricing Status — No status page listedDetails
Official source checked · checked 2026-10-23
LiveKit AgentsSDK/library
Real-time voice agent frameworks
Open documentation Pricing — No pricing page listedStatus Details
Official source checked · checked 2026-10-23Programming library or SDK; no hosted API key is implied.
MubertHosted API
AI music/audio
Open documentation Pricing Status — No status page listedDetails
Official source checked · checked 2026-10-23
MurfHosted API
Voiceover TTS
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-23
OpenAI Audio and RealtimeHosted API
Whisper, TTS, speech-to-speech
Open documentation Pricing Status Details
Official source checked · checked 2026-10-23
PipecatSDK/library
Real-time voice agent frameworks
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-23Programming library or SDK; no hosted API key is implied.
PiperSDK/library
Downloadable TTS
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-23Programming library or SDK; no hosted API key is implied.
PlayHTAccess needs review
Listed in the supplied document; current public API availability is not confirmed
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · API access unverified · checked 2026-10-23Current public API access is unconfirmed; check the provider’s access options. Historical documentation remains online, but current service availability is uncertain.
Resemble AIHosted API
Deepfake detection, media authenticity and identity APIs
Open documentation Pricing Status Details
Official source checked · checked 2026-10-23Current documentation emphasizes media authenticity and deepfake detection; historical voice cloning is not asserted as a current hosted offering.
Retell AIHosted API
Voice-agent phone platforms
Open documentation Pricing Status Details
Official source checked · checked 2026-10-23
Rev AIHosted API
Speech-to-text and audio analysis APIs
Open documentation Pricing Status Details
Official source checked · checked 2026-10-23
RimeHosted API
Text-to-speech APIs for conversational applications
Open documentation Pricing Status — No status page listedDetails
Official documentation checked · checked 2026-10-23
SonioxHosted API
Speech recognition and real-time transcription APIs
Open documentation Pricing Status Details
Official documentation checked · checked 2026-10-23
SoundrawPartner access
AI music/audio
Open documentation Pricing Status — No status page listedDetails
Official source checked · checked 2026-10-23Provider approval or a commercial agreement may be required.
SpeachesSelf-hosted
Self-hosted OpenAI-compatible audio API
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-23Install and run this software to expose its API.
SpeechifyHosted API
Text-to-speech and voice APIs
Open documentation Pricing Status Details
Official documentation checked · checked 2026-10-23
SpeechmaticsHosted API
Speech recognition
Open documentation Pricing Status Details
Official source checked · checked 2026-10-23
Stable AudioHosted API
AI music/audio
Open documentation Pricing — No pricing page listedStatus Details
Official source checked · checked 2026-10-23
SunoAccess needs review
Listed in the supplied document; current public API availability is not confirmed
Open documentation Pricing Status — No status page listedDetails
Official source checked · API access unverified · checked 2026-10-23Current public API access is unconfirmed; check the provider’s access options.
SynthflowHosted API
Voice-agent phone platforms
Open documentation Pricing Status Details
Official source checked · checked 2026-10-23
UdioAccess needs review
Listed in the supplied document; current public API availability is not confirmed
Open documentation Pricing — No pricing page listedStatus Details
Official source indexed · retrieval limited · API access unverified · checked 2026-10-23Current public API access is unconfirmed; check the provider’s access options.
VapiHosted API
Voice-agent phone platforms
Open documentation Pricing Status Details
Official source checked · checked 2026-10-23
WellSaidHosted API
Voiceover TTS
Open documentation Pricing — No pricing page listedStatus Details
Official source checked · checked 2026-10-23
WhisperSDK/library
Downloadable STT
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-23Programming library or SDK; no hosted API key is implied.
WhisperXSDK/library
Downloadable STT
Open documentation Pricing — No pricing page listedStatus — No status page listedDetails
Official source checked · checked 2026-10-23Programming library or SDK; no hosted API key is implied.