established · -1.6 capability action

Speech-to-Text

Score 24.7 / 100 53 providers +9 via APIs 28 APIs Search apis.io →
Business capabilities this tag reaches
AI Model Services 1 Information & Data Management 1

Providers using this tag (53)

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

Exemplar 3 Complete, well-documented, and agent-ready
Amazon TranscribeAudio ProcessingAmazon Web ServicesMachine LearningSpeech Recognition10 APIs75.6ElevenLabsArtificial IntelligenceText-to-SpeechVoice12 APIs83.2TranscriptFetchTranscriptsCaptionsYouTube2 APIs70.2
Strong 12 Solid coverage with minor gaps
SLNGCompanySpeechVoice7 APIs62.6SpekoVoiceVoice AIText-to-Speech1 API59.0CortiCompanyHealthHealthcareArtificial Intelligence8 APIs58.1SarvamCompanyArtificial IntelligenceMachine Learning1 API56.2ModulateCompanyArtificial IntelligenceVoice AI11 APIs61.8SiroCompanySalesSales CoachingConversation Intelligence5 APIs60.8MediaCaption APIYouTubeTranscriptionCaptionsSubtitles1 API60.2SimplismartCompanyArtificial IntelligenceMachine LearningInference18 APIs59.4ActionpowerSpeech RecognitionText-to-SpeechNatural Language Processing1 API58.9S&P GlobalCapital IQCommodity InsightsCredit RatingsDocument Extraction5 APIs58.6Wispr AICompanyVoiceDictation101 APIs57.7InterfazeCompanyArtificial IntelligenceMachine LearningLLM1 API56.3
Developing 16 Usable, with meaningful gaps to close
GradiumCompanyArtificial IntelligenceVoice AIText-to-Speech1 API54.2Allo-MediaCompanyAi DataSpeech Recognition4 APIs50.6GladiaTranscriptionAudio IntelligenceReal-Time1 API48.7DeepgramArtificial IntelligenceText-to-SpeechTranscription1 API47.7AssemblyAIArtificial IntelligenceAudioSpeechTranscription1 API45.7SpeechmaticsSpeech RecognitionTranscriptionReal-Time Transcription2 APIs44.2FreeTTSText-to-SpeechSpeech SynthesisAI-voiceAudio1 API43.3Sarj AI Developer APIVoice AIVoice AgentsConversational AIArabic AI4 APIs52.7Multiverse ComputingArtificial IntelligenceMachine LearningInferenceModel Compression2 APIs51.3Sully AIHealthcareHealth TechMedical AIClinical AI1 API45.9KenshoCompanyArtificial IntelligenceMachine LearningFinancial Data4 APIs45.4AieraFinancial ResearchEarnings CallsTranscriptsSEC Filings5 APIs44.9KotobaCompanyArtificial IntelligenceMachine LearningVoice4 APIs44.7Heidi HealthHealthcareHealth TechAI Medical ScribeAmbient AI1 API42.6VoiceittSpeech RecognitionVoiceAccessibility1 API42.3Reson8Speech RecognitionVoice AITranscription3 APIs41.5
Thin 12 Limited public surface area
CartesiaArtificial IntelligenceVoice AIText-to-Speech1 API36.5Fish AudioVoiceText-to-SpeechVoice Cloning1 API33.1TrintAudio TranscriptionTranscriptionMedia1 API33.1ArgmaxCompanyEnterpriseArtificial IntelligenceMachine Learning1 API38.7AllmodelsCompanyVoice AIText-to-Speech7 APIs35.0SonixAudio TranscriptionTranscriptionSubtitles1 API33.9aiOlaSpeech RecognitionText-to-SpeechVoice AI3 APIs33.3Symbl.aiCompanyConversation IntelligenceVoice AI31.3TortusCompanyHealthcareArtificial IntelligenceAmbient Clinical Documentation1 API29.5convert.expressCompanyTranscriptionAudio1 API28.6Cloverleaf AICompanyGovernmentB2GSales Intelligence1 API28.3Happy ScribeAudio TranscriptionTranscriptionSubtitles1 API28.2
Emerging 6 Early or largely undocumented
Rev AISpeech RecognitionTranscriptionAudio7 APIs19.9ContextliProductivityArtificial IntelligenceVoice Dictation24.3VoquillCompanyVoiceDictation23.3Wit.AICompanyNatural Language ProcessingSpeech Recognition1 API22.5Otter.aiArtificial IntelligenceTranscriptionMeeting Notes1 API17.4Useful SensorsCompanyArtificial IntelligenceText-to-Speech15.3
Minimal 4 Almost no public developer surface
Pop Up ArchiveCompanyAudioTranscription0.0Viva TranslateCompanyTranslationReal-Time TranslationTranscription9.7IntellaCompanyArtificial IntelligenceVoice AIConversational AI9.5SpeechlyCompanySpeech RecognitionVoiceSpoken Language Understanding1 API0.0

APIs with this tag (28)

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 2 Complete, well-documented, and agent-ready
elevenlabs Speech to Text APIEndpoints for converting audio into text transcriptions with support for multiple languages and audio formats.83.2Dify Audio APIText-to-Speech and Speech-to-Text operations. 2 operation(s) from the Dify Service API.78.8
Strong 9 Solid coverage with minor gaps
Azure AI Speech APISpeech-to-text, text-to-speech, speech translation, and speaker recognition.62.4DeepL Voice APIThe DeepL Voice API provides real-time speech transcription and translation. A POST to /v3/voice/realtime i...61.4Simplismart Speech to Text APIThe Speech to Text API from Simplismart — 2 operation(s) for speech to text.59.4RingCentral Audio and Video AI APIThe RingCentral Audio and Video AI API exposes speech-to-text, summarization, and conversational analytics ...58.7Kensho Scribe Batch API v1Legacy v1 batch transcription endpoint (POST /api/v1/transcription). Superseded by the v2 batch API which d...58.6Kensho Scribe Batch API v2Asynchronous audio and video transcription REST API. POST a media file to start a transcription job, then p...58.6Kensho Scribe Real Time APIReal-time streaming transcription over a WebSocket at wss://scribe.kensho.com/ws. Clients send an Authentic...58.6Corti Speech to Text APIReal-time, bidirectional stateless dictation over WebSocket, returning live transcripts and detected commands.58.1Sarvam Speech To Text APIThe Speech To Text API from Sarvam — 2 operation(s) for speech to text.56.2
Developing 8 Usable, with meaningful gaps to close
Gladia Live (Real-time) APIWebSocket API for real-time live audio transcription with sub-second latency, supporting multi-language det...48.7Nuance Mix ASRaaS gRPC APIAutomatic Speech Recognition as a Service — convert speech to text in real time over a gRPC streaming API (...48.0Mistral AI Audio Transcription APIAudio transcription API powered by Voxtral for speech-to-text with diarization, word-level timestamps, and ...47.3Kensho ScribeAsynchronous speech-to-text transcription API that turns audio and video into text with high accuracy. Supp...45.4Speechmatics Realtime Transcription APIWebSocket API for low-latency real-time streaming transcription supporting live audio input, speaker diariz...44.2FreeTTS REST APIREST/JSON API for text-to-speech synthesis, audio and SRT subtitle download, and voice listing. Uses x-api-...43.3Voiceitt WebSockets APISocket.IO WebSockets API for real-time speech recognition. After JWT login via the HTTP API, clients set re...42.3Reson8 Speech to Text APIRealtime, turn-level, and prerecorded transcription.41.5
Thin 7 Limited public surface area
Argmax Local ServerA local transcription server for macOS that is API-compatible with the Deepgram Speech-to-Text (Live) API, ...38.7Agora Real-Time Speech-to-Text APIThe Agora Real-Time Speech-to-Text API provides streaming transcription and real-time translation across mu...37.4Cartesia Speech-to-Text APIBatch transcription of an audio file of any length.36.5Cartesia STT WebSocket APIRealtime transcription over WebSocket at wss://api.cartesia.ai/stt/websocket. Clients stream raw binary aud...36.5aiOla Speech to Text APIJargonic automatic speech recognition. Batch file transcription over HTTP (POST /api/speech-to-text/file, 5...33.3Fish Audio APIThe Fish Audio API provides RESTful access to text-to-speech, speech-to-text, voice cloning, and voice mana...33.1Podcastle TranscriptionTranscription and speech-to-text are Podcastle platform features (multi-language transcription with speaker...27.0
Emerging 2 Early or largely undocumented
Taddy Episode Transcripts APIRetrieve episode transcripts with getEpisodeTranscript and the transcriptWithSpeakersAndTimecodes field, in...20.3Otter.ai APIThe Otter.ai REST API enables Enterprise customers to programmatically upload audio and video files for tra...17.4

Companies reaching this through an API (9)

These companies publish an API, specification or operation carrying “Speech-to-Text” 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.

Agora DeepL Dify Microsoft Cognitive Services Mistral AI Nuance Podcastle RingCentral Taddy

Score breakdown

Frequency
48.7
log-scaled weighted occurrences
Breadth
0.7
spread across providers
Quality lift
41.8
mean composite of providers using it
Cohesion
26.5
strength of nearest seed neighbor

Where this tag sits

Voice AI broader Voice broader

Related tags

Transcription 34 co-occurrences Speech Recognition 15 co-occurrences Text-to-Speech 21 co-occurrences Voice AI 16 co-occurrences Captions 7 co-occurrences Voice Agents 7 co-occurrences Voice 26 co-occurrences Voice Cloning 5 co-occurrences

Where this tag comes from

Provider tag53
Api tag28
Openapi tag4
Openapi op tag8

Markets provisional

Kin Score markets whose measured providers carry this tag. Share is the fraction of the market's measured providers that carry it — it describes the market, not this tag.

MarketShare of the market's providers
Speech and Voice AI27%

Cohort brief

Auto-generated

The 51 providers in the APIs.io catalog tagged Speech-to-Text, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
51
of 53 in the catalog
Mean Kin Score
43.3
+19.2 vs catalog 24.1
Mean Agent Readiness
28.7
+14.6 vs catalog 14.1
Spread
0–83.2
median 44.7 · σ 16.9
How the 51 split by band
Exemplar 3Strong 12Developing 16Thin 12Emerging 6Minimal 2
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Developer Ergonomics 51.2 24.5 +26.7 51
Access Clarity 51.8 30 +21.8 51
Contract Quality 37.5 18.6 +18.9 51
Operational Transparency 29.2 13.2 +16 51
Discoverability 71.5 59.1 +12.4 51
Contract Governance 16.8 9.7 +7.1 51

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) 39% 18% +21
MCP server (first-party) 41% 16% +25
Agent Skills 0% 0% 0
OAuth scopes 18% 13% +5
Security 100% 99% +1
Arazzo workflows 2% 1% +1
Governance rules 61% 36% +25

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 ElevenLabs 83.2
  2. 2 Amazon Transcribe 75.6
  3. 3 TranscriptFetch 70.2
  4. 4 SLNG 62.6
  5. 5 Modulate 61.8
  6. 6 Siro 60.8
  7. 7 MediaCaption API 60.2
  8. 8 Simplismart 59.4
  9. 9 Speko 59
  10. 10 Actionpower 58.9
Top by Agent Readiness
  1. 1 Sarj AI Developer API 65.6
  2. 2 S&P Global 65.1
  3. 3 Speko 61
  4. 4 ElevenLabs 60.3
  5. 5 TranscriptFetch 56.9
  6. 6 Fish Audio 52.6
  7. 7 Kensho 51.1
  8. 8 MediaCaption API 48.7
  9. 9 Sonix 43.9
  10. 10 Trint 42.4
All 53 members of this roster resolve to a provider in the catalog; 51 carry a score (96%). The figures above describe the scored members only.
Coverage caveat. 35 of 51 scored members had under half their catalog-attributable points satisfied at all (catalog_earned / catalog_max < 0.5). They are INCLUDED in the mean above. A large share here means the cohort mean is partly a measurement of how far our enrichment reached, not only of how these providers publish.Generated from the catalog build of 14 November 2026, across 41591 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

Every tag here is available over the APIs.io API and to AI agents over MCP.

MCP server

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https://apis.io/mcp

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 →

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