established · 0.0 market domain

Text-to-Speech

Score 25.9 / 100 66 providers +8 via APIs 46 APIs Search apis.io →
Variants seen in the corpus: Text To SpeechText to SpeechText-To-SpeechText-to-SpeechText-to-speechTextToSpeechtext to speechtextToSpeech

Providers using this tag (66)

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Exemplar 1 Complete, well-documented, and agent-ready
VapiArtificial IntelligenceVoice AIVoice AgentsConversational AI15 APIs73.6
Strong 4 Solid coverage with minor gaps
CaptionsCompanyVideoArtificial IntelligenceVideo Editing3 APIs65.9Inworld AIArtificial IntelligenceVoiceSpeech-to-Text6 APIs65.1Amazon PollyArtificial IntelligenceMachine-LearningSpeech Synthesis2 APIs60.1BlumaCompanyArtificial IntelligenceVideoVideo Generation2 APIs56.8
Developing 32 Usable, with meaningful gaps to close
SLNGCompanySpeechVoiceSpeech-to-Text7 APIs53.7SpeechmaticsSpeech RecognitionSpeech-to-TextTranscriptionReal-Time Transcription2 APIs50.6SpekoVoiceVoice AISpeech-to-Text1 API50.3DeepdubCompanyVoiceDubbing2 APIs49.3ELBO AI, INCCompanyArtificial IntelligenceVideo1 API49.3HedraCompanyArtificial IntelligenceGenerative AIVideo Generation1 API48.5KugelAudioVoiceSpeech SynthesisVoice AI1 API48.1GeminiAgentsArtificial IntelligenceAudio UnderstandingBatch Processing1 API48.0GradiumCompanyAi MlVoice AI1 API47.9DeepgramArtificial IntelligenceSpeech-to-TextTranscription3 APIs47.6StepFunArtificial IntelligenceLLMMulti-ModalChat Completion12 APIs47.6SarvamCompanyAi MlArtificial IntelligenceMachine-Learning1 API47.4ActionpowerSpeech RecognitionSpeech-to-TextNatural Language Processing2 APIs47.3UnisoundCompanyArtificial IntelligenceSpeech Recognition3 APIs47.0MirageCompanyArtificial IntelligenceVideoVideo Generation1 API46.9Moore ThreadsCompanyGPUArtificial IntelligenceMachine-Learning4 APIs46.7HeyGenArtificial IntelligenceGenerative AIVideoAvatars1 API46.6NeuphonicVoice AIAudioStreaming1 API46.6AutoContent APIArtificial IntelligenceAudioContent GenerationPodcasts1 API46.5Google Cloud Text-To-SpeechAudioGoogle CloudMachine-LearningSpeech Synthesis1 API45.3CartesiaArtificial IntelligenceVoice AISpeech-to-Text1 API44.8LMNTVoice SynthesisVoice CloningAudio Streaming1 API44.8Hailuo AI / MiniMaxVideo GenerationAI VideoGenerative AIText-to-Video1 API44.3PlayHTVoiceTTSVoice Cloning1 API44.1Smallest AIArtificial IntelligenceVoiceReal-Time1 API43.1KotobaCompanyArtificial IntelligenceMachine-LearningVoice4 APIs42.8FreeTTSSpeech SynthesisAI-voiceAudio1 API42.6Sarvam AIArtificial IntelligenceLLMSpeech-to-Text1 API42.1Sarj AI Developer APIVoice AIVoice AgentsConversational AIArabic AI4 APIs41.5GlioCompanyArtificial IntelligenceMachine-LearningMedia Generation1 API41.4useapi.netCompanyArtificial IntelligenceGenerative AIVideo Generation2 APIs41.4ListnrArtificial IntelligenceTTSVoice1 API39.9
Thin 18 Limited public surface area
PodcastleArtificial IntelligenceAudioVoice Cloning1 API38.8NarakeetTTSVoiceAudio1 API38.6UberduckArtificial IntelligenceTTSVoice1 API38.4Fish AudioVoiceSpeech-to-TextVoice Cloning1 API38.3CreatifyAI AvatarsVideo GenerationAI VideoGenerative AI1 API37.7SpeechifyArtificial IntelligenceVoiceSpeech Synthesis1 API37.7WondercraftArtificial IntelligenceAudioPodcast1 API37.2LOVO AIArtificial IntelligenceTTSVoice Generation1 API36.7Unreal SpeechTTSSpeech SynthesisAudio1 API36.7HouroneCompanyArtificial IntelligenceVideoVideo Generation2 APIs36.5WellSaid LabsArtificial IntelligenceVoiceAudio1 API36.1PolyaiCompanyConversational AIVoice AICustomer Service1 API35.6Kalpa LabsCompanySpeechVoice1 API35.3Ex-HumanCompanyArtificial IntelligenceConversational AIAI Companions1 API33.6RespeecherVoice AIVoice CloningSpeech to Speech1 API33.0ImaginodeArtificial IntelligenceImage-GenerationVideo Generation2 APIs30.5OddcastCompanySpeech SynthesisAvatars2 APIs28.9Camb.AIArtificial IntelligenceDubbingTranslation1 API28.6
Emerging 10 Early or largely undocumented
NuanceCompanySpeech RecognitionConversational AINatural Language Understanding5 APIs25.7Wit.AICompanyNatural Language ProcessingNLPSpeech Recognition1 API23.6YouartCompanyArtificial IntelligenceGenerative AIImage-Generation1 API21.5EverlitAudioVideoSocialPodcasts2 APIs21.0MiraiCompanyArtificial IntelligenceOn-Device AIInference1 API20.9Useful SensorsCompanyAi MlSpeech-to-Text18.1ReadSpeakerSpeechAudioVoice1 API17.8Replica StudiosCompanyVoiceSpeech to Speech1 API14.7PinokioAI LauncherAI BrowserLocal AIOpen-Source12.9InstareadCompanyAudioPublishing12.7
Minimal 1 Almost no public developer surface
SonanticVoiceEmotive AIAcquired5.0

APIs with this tag (46)

Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Exemplar 1 Complete, well-documented, and agent-ready
Adobe Suite Text To Speech APIEndpoints for text-to-speech operations.75.6
Strong 3 Solid coverage with minor gaps
Inworld AI Text To Speech APISynthesize speech from text using Inworld voice models.65.1Dify Audio APIText-to-Speech and Speech-to-Text operations. 2 operation(s) from the Dify Service API.64.0OCI AI Speech APIAI service for converting audio and media files to accurate text transcriptions in JSON and SRT formats usi...60.2
Developing 21 Usable, with meaningful gaps to close
Runway Text-to-Speech APISynthesize speech audio from text.51.6Speechmatics Text-to-Speech APIREST API for converting text to natural-sounding speech with multiple voice options and language support.50.6ELBO AI, INC Text to Speech APIThe Text to Speech API from ELBO AI, INC — 1 operation(s) for text to speech.49.3Gemini Text-to-Speech APINative audio generation text-to-speech capabilities through the Gemini API, supporting single and multi-spe...48.0Deepgram Text-To-Speech APIConvert text into natural-sounding speech audio.47.6StepFun Audio APISpeech synthesis (TTS), voice cloning with preview, official voice catalog, audio transcription, and file-b...47.6Sarvam textToSpeech APIThe textToSpeech API from Sarvam — 2 operation(s) for texttospeech.47.4daglo Cloud APIREST API for ActionPower's speech and language stack, served at https://apis.daglo.ai and authenticated wit...47.3Unisound AI Open Platform Speech WebAPIWebSocket speech APIs on the Unisound AI Open Platform: one-sentence speech recognition (Mandarin, Cantones...47.0Unisound Token Hub APIMulti-modal MaaS API for Unisound U2 models: OpenAI-compatible chat completions and Anthropic-compatible me...47.0Moore Threads AIBook Text-to-Speech APIHTTP and WebSocket speech synthesis. A non-streaming POST /api/v1/tts/generate returns a complete wav/mp3 f...46.7HeyGen APIThe HeyGen REST API exposes video generation, avatar management, text-to-speech (Starfish), video translati...46.6Neuphonic TTS WebSocket APIWebSocket endpoint for continuous, low-latency text-to-speech streaming. Enables real-time voice synthesis ...46.6Cartesia Text-to-Speech APISingle-shot and streamed speech generation over plain HTTP.44.8Cartesia TTS WebSocket APIBidirectional, multiplexed WebSocket at wss://api.cartesia.ai/tts/websocket for realtime speech generation....44.8Hailuo AI / MiniMax Text to Speech APISpeech synthesis (T2A v2).44.3Smallest AI Text to Speech APISynthesize speech from text.43.1FreeTTS REST APIREST/JSON API for text-to-speech synthesis, audio and SRT subtitle download, and voice listing. Uses x-api-...42.6Sarvam AI Text to Speech APIThe Text to Speech API from Sarvam AI — 1 operation(s) for text to speech.42.1Pryon Text To Speech APIThe TextToSpeech API from Pryon — 1 operation(s) for texttospeech.41.6Listnr Text-to-Speech APIConvert SSML text or an article URL into audio.39.9
Thin 16 Limited public surface area
Azure AI Speech APISpeech-to-text, text-to-speech, speech translation, and speaker recognition.38.8Podcastle Text to Speech APISynthesize speech from text in batch, streaming, or with word timestamps.38.8Narakeet Text to Speech APIBuild narrated audio (MP3, M4A, WAV) from text, SubRip, or WebVTT input.38.6Uberduck Text-to-Speech APISynthesize speech from text using a chosen voice and model.38.4Fish Audio APIThe Fish Audio API provides RESTful access to text-to-speech, speech-to-text, voice cloning, and voice mana...38.3Creatify Text-to-Speech APIGenerate voiceovers from text.37.7LOVO AI Text-to-Speech APIConvert text to speech synchronously or asynchronously and retrieve job results.36.7WellSaid Labs Text-to-Speech APIRender text to speech as clips or audio streams.36.1Ex-Human Text to Speech APIThe Text to Speech API from Ex-Human — 1 operation(s) for text to speech.33.6Respeecher Space Real-Time TTS APILow-latency real-time text-to-speech that begins streaming audio in under 200ms via three transports - one-...33.0elevenlabs Text to Speech APIEndpoints for converting text into speech audio with configurable voice, model, and output format settings.32.7Imaginode MCP ServerHosted MCP server (Streamable HTTP transport) exposing four tools: list_models, generate_image, generate_vi...30.5Imaginode REST APIREST API to list models and launch/track image and video generations. Endpoints: GET /api/models (unauthent...30.5SitePal Avatar APISitePal is Oddcast's AI avatar platform. Speaking characters are embedded on a web page or app and controll...28.9Vocalware Text-to-Speech APIVocalware is Oddcast's cloud text-to-speech service. It exposes a pay-as-you-go HTTP/REST API (suitable for...28.9Camb.AI Text-to-Speech APIConvert text to speech with the MARS voice models.28.6
Emerging 5 Early or largely undocumented
Nuance Mix TTSaaS gRPC APIText-to-Speech as a Service — turn text into synthesized speech (including neural voices) over a gRPC Synth...25.7Everlit REST APIEverlit markets a REST API for connecting a custom CMS or platform that has no native integration — "our RE...21.0IBM Watson Text to SpeechConvert written text to natural-sounding audio in a variety of languages and voices. The service synthesize...20.2ReadSpeaker speechCloud APIA cloud-based text-to-speech API. When using the API from within your software or application, you simply s...17.8Replica APIReplica API v2 (OpenAPI 3.0.0) — REST API for AI text-to-speech, speech-to-speech, and voice-library operat...14.7

Companies reaching this through an API (8)

These companies publish an API, specification or operation carrying “Text-to-Speech” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.

Adobe Suite Dify Elevenlabs IBM Watson Microsoft Cognitive Services Oracle Pryon Runway

Score breakdown

Frequency
58.1
log-scaled weighted occurrences
Breadth
1.8
spread across providers
Quality lift
45.1
mean composite of providers using it
Cohesion
12.4
strength of nearest seed neighbor

Related tags

Voice Cloning 20 co-occurrences Voices 22 co-occurrences Speech Synthesis 14 co-occurrences Speech-to-Text 21 co-occurrences TTS 15 co-occurrences Voice 31 co-occurrences Video Generation 15 co-occurrences Speech Recognition 12 co-occurrences

Where this tag comes from

Provider tag66
Api tag46
Openapi tag21
Openapi op tag44

Cohort brief

Auto-generated

The 66 providers in the APIs.io catalog tagged Text-to-Speech, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
66
all scored
Mean Kin Score
39.8
+15.9 vs catalog 23.9
Mean Agent Readiness
22.5
+10.5 vs catalog 12
Spread
5–73.6
median 41.8 · σ 12.9
How the 66 split by band
Exemplar 1Strong 4Developing 32Thin 18Emerging 10Minimal 1
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 42.5 19.8 +22.7 66
Developer Ergonomics 46.1 23.4 +22.7 66
Access Clarity 42.6 26.5 +16.1 66
Operational Transparency 27.5 14 +13.5 66
Discoverability 71.9 61.2 +10.7 66
Contract Governance 7.9 6.4 +1.5 66

A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.

What this cohort publishes
ArtifactThis cohortCatalogDifference
MCP server (any) 17% 10% +7
MCP server (first-party) 23% 13% +10
Agent Skills 0% 0% 0
OAuth scopes 5% 11% -6
Security 100% 97% +3
Arazzo workflows 8% 2% +6
Governance rules 24% 14% +10

mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.

Top by Kin Score
  1. 1 Vapi 73.6
  2. 2 Captions 65.9
  3. 3 Inworld AI 65.1
  4. 4 Amazon Polly 60.1
  5. 5 Bluma 56.8
  6. 6 SLNG 53.7
  7. 7 Speechmatics 50.6
  8. 8 Speko 50.3
  9. 9 Deepdub 49.3
  10. 10 ELBO AI, INC 49.3
Top by Agent Readiness
  1. 1 Sarj AI Developer API 62.9
  2. 2 AutoContent API 48
  3. 3 Speko 44.4
  4. 4 ELBO AI, INC 43.9
  5. 5 useapi.net 39
  6. 6 Vapi 36.5
  7. 7 Actionpower 35.8
  8. 8 HeyGen 35.2
  9. 9 Bluma 34.7
  10. 10 Deepdub 33.2
All 66 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 15 September 2026, across 27661 providers, using the same computation served by the APIs.io cohort API. Briefs are published for rosters of 5 or more scored providers; below that a distribution is not meaningful.

Work with this as data

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Tools for tags

7 MCP tools reach this
  • find_tagsBrowse and filter every tag in the catalog.
  • get_cohortThis tag as a scored cohort — every provider carrying it, with scores.
  • cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
  • cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

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This tag 
curl "https://apis.io/api/v1/tags/text-to-speech"
All tags 
curl "https://apis.io/api/v1/tags?limit=25"
As a scored cohort 
curl "https://apis.io/api/v1/cohorts/tag/text-to-speech"
The distribution (Pro) 
curl "https://apis.io/api/v1/cohorts/tag/text-to-speech/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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