established · 0.6

Text-to-Speech

Score 26.7 / 100 69 providers 42 APIs Search apis.io →
Variants seen in the corpus: Text To SpeechText to SpeechText-To-SpeechText-to-SpeechTextToSpeechtext to speechtext-to-speechtextToSpeech

Providers using this tag (69)

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

Exemplar 2 Complete, well-documented, and agent-ready
VapiArtificial IntelligenceVoice AIVoice AgentsConversational AI15 APIs75.1Inworld AIArtificial IntelligenceVoiceSpeech-to-Text7 APIs66.7
Strong 5 Solid coverage with minor gaps
CaptionsCompanyVideoArtificial IntelligenceVideo Editing7 APIs66.3Amazon PollyArtificial IntelligenceMachine-LearningSpeech Synthesis5 APIs59.6BlumaCompanyArtificial IntelligenceVideoVideo Generation2 APIs57.1SLNGCompanySpeechVoiceSpeech-to-Text15 APIs56.9useapi.netCompanyArtificial IntelligenceGenerative AIVideo Generation12 APIs55.4
Developing 29 Usable, with meaningful gaps to close
OracleCloudDatabaseEnterpriseInfrastructure378 APIs53.0SpekoVoiceVoice AISpeech-to-Text4 APIs52.2DeepdubCompanyVoiceDubbing7 APIs52.0HedraCompanyArtificial IntelligenceGenerative AIVideo Generation1 API50.9GradiumCompanyAi MlVoice AI6 APIs50.8KugelAudioVoiceSpeech SynthesisVoice AI14 APIs50.7SarvamCompanyAi MlArtificial IntelligenceMachine-Learning8 APIs50.4SpeechmaticsSpeech RecognitionSpeech-to-TextTranscriptionReal-Time Transcription7 APIs50.4ELBO AI, INCCompanyArtificial IntelligenceVideo5 APIs49.3DeepgramArtificial IntelligenceSpeech-to-TextTranscription12 APIs49.2MirageCompanyArtificial IntelligenceVideoVideo Generation7 APIs48.4NeuphonicVoice AIAudioStreaming7 APIs47.8StepFunArtificial IntelligenceLLMMulti-ModalChat Completion12 APIs47.8UnisoundCompanyArtificial IntelligenceSpeech Recognition3 APIs47.0Google Cloud Text-To-SpeechAudioGoogle CloudMachine-LearningSpeech Synthesis2 APIs46.7LMNTVoice SynthesisVoice CloningAudio Streaming4 APIs46.1GeminiAgentsArtificial IntelligenceAudio UnderstandingBatch Processing20 APIs46.0KotobaCompanyArtificial IntelligenceMachine-LearningVoice1 API45.3RunwayVideo GenerationAI VideoGenerative AIText-to-Video8 APIs44.7SK TelecomTelecommunicationsSouth KoreaMobile Network OperatorNetwork APIs15 APIs44.5Hailuo AI / MiniMaxVideo GenerationAI VideoGenerative AIText-to-Video5 APIs44.1PryonArtificial IntelligenceRetrieval Augmented GenerationEnterprise SearchKnowledge-Management24 APIs43.6GlioCompanyArtificial IntelligenceMachine-LearningMedia Generation2 APIs43.5Smallest AIArtificial IntelligenceVoiceReal-Time4 APIs43.1CartesiaArtificial IntelligenceVoice AISpeech-to-Text21 APIs43.0HeyGenArtificial IntelligenceGenerative AIVideoAvatars13 APIs42.8Sarvam AIArtificial IntelligenceLLMSpeech-to-Text6 APIs41.9ListnrArtificial IntelligenceTTSVoice3 APIs39.5UberduckArtificial IntelligenceTTSVoice4 APIs39.5
Thin 21 Limited public surface area
HouroneCompanyArtificial IntelligenceVideoVideo Generation6 APIs39.2WellSaid LabsArtificial IntelligenceVoiceAudio4 APIs39.0PodcastleArtificial IntelligenceAudioVoice Cloning3 APIs38.6Kalpa LabsCompanySpeechVoice3 APIs38.2NarakeetTTSVoiceAudio4 APIs38.2SpeechifyArtificial IntelligenceVoiceSpeech Synthesis2 APIs38.2Fish AudioVoiceSpeech-to-TextVoice Cloning5 APIs38.1PlayHTVoiceTTSVoice Cloning8 APIs37.7CreatifyAI AvatarsVideo GenerationAI VideoGenerative AI10 APIs37.4LOVO AIArtificial IntelligenceTTSVoice Generation3 APIs37.0Unreal SpeechTTSSpeech SynthesisAudio3 APIs37.0WondercraftArtificial IntelligenceAudioPodcast4 APIs36.8Microsoft Cognitive ServicesAzure AIComputer-VisionSpeechNLP5 APIs36.7Ex-HumanCompanyArtificial IntelligenceConversational AIAI Companions4 APIs36.3PolyaiCompanyConversational AIVoice AICustomer Service1 API35.8elevenlabs22 APIs33.6RespeecherVoice AIVoice CloningSpeech to Speech17 APIs33.0Sarj AI Developer APIVoice AIVoice AgentsConversational AIArabic AI27 APIs32.9Camb.AIArtificial IntelligenceDubbingTranslation6 APIs31.8OddcastCompanySpeech SynthesisAvatars2 APIs28.9WellSaid LabsArtificial IntelligenceTTSVoice4 APIs28.8
Emerging 11 Early or largely undocumented
NuanceCompanySpeech RecognitionConversational AINatural Language Understanding5 APIs24.9Wit.AICompanyNatural Language ProcessingNLPSpeech Recognition1 API23.6YouartCompanyArtificial IntelligenceGenerative AIImage-Generation1 API21.5AutoContent APIArtificial IntelligenceAudioContent GenerationPodcasts9 APIs20.8IBM WatsonArtificial IntelligenceIBMMachine-LearningNatural Language Processing4 APIs20.2MiraiCompanyArtificial IntelligenceOn-Device AIInference1 API19.0Useful SensorsCompanyAi MlSpeech-to-Text17.4ReadSpeakerSpeechAudioVoice1 API15.9Replica 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 (42)

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
Inworld AI Text To Speech APISynthesize speech from text using Inworld voice models.66.7
Strong 2 Solid coverage with minor gaps
MiniMax / Hailuo AI API v1REST API for MiniMax via Hailuo AI — Hailuo video models plus third-party video, a broad image model catalo...55.4PixVerse API v2REST API for PixVerse.ai — native PixVerse video models plus third-party video, a broad image catalog, musi...55.4
Developing 21 Usable, with meaningful gaps to close
OCI AI Speech APIAI service for converting audio and media files to accurate text transcriptions in JSON and SRT formats usi...53.0Sarvam textToSpeech APIThe textToSpeech API from Sarvam — 2 operation(s) for texttospeech.50.4Speechmatics Text-to-Speech APIREST API for converting text to natural-sounding speech with multiple voice options and language support.50.4ELBO AI, INC Text to Speech APIThe Text to Speech API from ELBO AI, INC — 1 operation(s) for text to speech.49.3Deepgram Text-To-Speech APIConvert text into natural-sounding speech audio.49.2Neuphonic TTS WebSocket APIWebSocket endpoint for continuous, low-latency text-to-speech streaming. Enables real-time voice synthesis ...47.8StepFun Audio APISpeech synthesis (TTS), voice cloning with preview, official voice catalog, audio transcription, and file-b...47.8Unisound 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...47.0Gemini Text-to-Speech APINative audio generation text-to-speech capabilities through the Gemini API, supporting single and multi-spe...46.0Runway Text-to-Speech APISynthesize speech audio from text.44.7SK Telecom A.X TTS APIKorean text-to-speech built on SK Telecom's own DNN speech-synthesis models and voice database, operated by...44.5Hailuo AI / MiniMax Text to Speech APISpeech synthesis (T2A v2).44.1Pryon Text To Speech APIThe TextToSpeech API from Pryon — 1 operation(s) for texttospeech.43.6Smallest AI Text to Speech APISynthesize speech from text.43.1Cartesia Text-to-Speech APISingle-shot and streamed speech generation over plain HTTP.43.0Cartesia TTS WebSocket APIBidirectional, multiplexed WebSocket at wss://api.cartesia.ai/tts/websocket for realtime speech generation....43.0HeyGen APIThe HeyGen REST API exposes video generation, avatar management, text-to-speech (Starfish), video translati...42.8Sarvam AI Text to Speech APIThe Text to Speech API from Sarvam AI — 1 operation(s) for text to speech.41.9Listnr Text-to-Speech APIConvert SSML text or an article URL into audio.39.5Uberduck Text-to-Speech APISynthesize speech from text using a chosen voice and model.39.5
Thin 14 Limited public surface area
WellSaid Labs Text-to-Speech APIRender text to speech as clips or audio streams.39.0Podcastle Text to Speech APISynthesize speech from text in batch, streaming, or with word timestamps.38.6Narakeet Text to Speech APIBuild narrated audio (MP3, M4A, WAV) from text, SubRip, or WebVTT input.38.2Fish Audio APIThe Fish Audio API provides RESTful access to text-to-speech, speech-to-text, voice cloning, and voice mana...38.1Creatify Text-to-Speech APIGenerate voiceovers from text.37.4LOVO AI Text-to-Speech APIConvert text to speech synchronously or asynchronously and retrieve job results.37.0Azure AI Speech APISpeech-to-text, text-to-speech, speech translation, and speaker recognition.36.7Ex-Human Text to Speech APIThe Text to Speech API from Ex-Human — 1 operation(s) for text to speech.36.3elevenlabs Text to Speech APIEndpoints for converting text into speech audio with configurable voice, model, and output format settings.33.6Respeecher Space Real-Time TTS APILow-latency real-time text-to-speech that begins streaming audio in under 200ms via three transports - one-...33.0Camb.AI Text-to-Speech APIConvert text to speech with the MARS voice models.31.8SitePal 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...28.9WellSaid Labs Text-to-Speech APIRender text to speech, with streaming audio and word timing.28.8
Emerging 4 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...24.9IBM 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...15.9Replica APIReplica API v2 (OpenAPI 3.0.0) — REST API for AI text-to-speech, speech-to-speech, and voice-library operat...14.7

Score breakdown

Frequency
57.7
log-scaled weighted occurrences
Breadth
1.9
spread across providers
Quality lift
48.9
mean composite of providers using it
Cohesion
13.2
strength of nearest seed neighbor

Related tags

Voice Cloning 21 co-occurrences Voices 22 co-occurrences Speech Synthesis 14 co-occurrences TTS 15 co-occurrences Speech-to-Text 18 co-occurrences Speech 11 co-occurrences Voice 31 co-occurrences Video Generation 14 co-occurrences

Where this tag comes from

Provider tag62
Api tag42
Openapi tag21
Openapi op tag44

Cohort brief

Auto-generated

The 69 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
69
all scored
Mean Kin Score
39.9
+19.2 vs catalog 20.7
Mean Agent Readiness
22
+12.3 vs catalog 9.7
Spread
5–75.1
median 39.5 · σ 13.5
How the 69 split by band
Exemplar 2Strong 5Developing 29Thin 21Emerging 11Minimal 1
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 45.8 17.5 +28.3 69
Developer Ergonomics 41.6 17.9 +23.7 69
Access Clarity 39.7 22.3 +17.4 69
Operational Transparency 25.8 11.3 +14.5 69
Discoverability 74.1 60.4 +13.7 69
Contract Governance 11.2 6.4 +4.8 69

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) 38% 16% +22
MCP server (first-party) 14% 7% +7
Agent Skills 0% 0% 0
OAuth scopes 4% 9% -5
Security 100% 88% +12
Arazzo workflows 9% 2% +7
Governance rules 26% 13% +13

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 75.1
  2. 2 Inworld AI 66.7
  3. 3 Captions 66.3
  4. 4 Amazon Polly 59.6
  5. 5 Bluma 57.1
  6. 6 SLNG 56.9
  7. 7 useapi.net 55.4
  8. 8 Oracle 53
  9. 9 Speko 52.2
  10. 10 Deepdub 52
Top by Agent Readiness
  1. 1 Sarj AI Developer API 60.4
  2. 2 ELBO AI, INC 43.9
  3. 3 SK Telecom 43.7
  4. 4 Oracle 41.9
  5. 5 Speko 41.1
  6. 6 useapi.net 39
  7. 7 Vapi 36.5
  8. 8 Deepdub 31.5
  9. 9 StepFun 30.6
  10. 10 SLNG 30
All 69 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 25 August 2026, across 26891 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.

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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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