established · 0.6 capability action

Speech-to-Text

Score 27.8 / 100 58 providers 29 APIs Search apis.io →
Variants seen in the corpus: Speech To TextSpeech to TextSpeech-To-TextSpeech-to-Textspeech to textspeech-to-textspeechToText

Providers using this tag (58)

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

Exemplar 1 Complete, well-documented, and agent-ready
Inworld AIArtificial IntelligenceVoiceText-to-Speech7 APIs66.7
Strong 6 Solid coverage with minor gaps
S&P GlobalCapital IQCommodity InsightsCredit RatingsDocument Extraction9 APIs64.6CortiCompanyHealthHealthcareArtificial Intelligence8 APIs62.4KPNTelecommunicationsNetherlandsMobile Network OperatorBroadband38 APIs61.9RingCentralCommunicationsUCaaSVoiceVideo88 APIs58.2ModulateCompanyArtificial IntelligenceVoice AI11 APIs57.3SLNGCompanySpeechVoice15 APIs56.9
Developing 22 Usable, with meaningful gaps to close
Fireflies.aiCompanyMeetingsTranscription1 API53.9SimplismartCompanyArtificial IntelligenceMachine-LearningInference8 APIs53.3SpekoVoiceVoice AIText-to-Speech4 APIs52.2GladiaTranscriptionAudio IntelligenceReal-Time9 APIs52.1SiroCompanySalesSales CoachingConversation Intelligence5 APIs51.8GradiumCompanyAi MlVoice AIText-to-Speech6 APIs50.8Amazon TranscribeAudio ProcessingMachine-LearningSpeech Recognition2 APIs50.7SarvamCompanyAi MlArtificial IntelligenceMachine-Learning8 APIs50.4SpeechmaticsSpeech RecognitionTranscriptionReal-Time Transcription7 APIs50.4DeepLArtificial IntelligenceDeep LearningGlossaryLocalization7 APIs49.9Heidi HealthHealthcareHealth TechAI Medical ScribeAmbient AI11 APIs49.4DeepgramArtificial IntelligenceText-to-SpeechTranscription12 APIs49.2InterfazeCompanyArtificial IntelligenceMachine-LearningLLM1 API47.9Allo-MediaCompanyAi DataSpeech Recognition4 APIs47.2Reson8Speech RecognitionASRVoice AI3 APIs45.4KotobaCompanyArtificial IntelligenceMachine-LearningVoice1 API45.3KenshoCompanyArtificial IntelligenceMachine-LearningFinancial Data4 APIs44.6Wispr AICompanyVoiceDictation50 APIs43.7CartesiaArtificial IntelligenceVoice AIText-to-Speech21 APIs43.0AssemblyAIArtificial IntelligenceAudioSpeechTranscription3 APIs42.3Sarvam AIArtificial IntelligenceLLMText-to-Speech6 APIs41.9VoiceittSpeech RecognitionVoiceAccessibility3 APIs40.4
Thin 17 Limited public surface area
Happy ScribeAudio TranscriptionTranscriptionSubtitles7 APIs39.0SonixAudio TranscriptionTranscriptionSubtitles6 APIs39.0PodcastleArtificial IntelligenceAudioText-to-SpeechVoice Cloning3 APIs38.6TrintAudio TranscriptionTranscriptionMedia6 APIs38.2Fish AudioVoiceText-to-SpeechVoice Cloning5 APIs38.1Microsoft Cognitive ServicesAzure AIComputer-VisionSpeechNLP5 APIs36.7ArgmaxCompanyEnterpriseArtificial IntelligenceMachine-Learning1 API34.3Symbl.aiCompanyConversation IntelligenceVoice AI34.0elevenlabs22 APIs33.6Mistral AICompanyArtificial IntelligenceLarge Language ModelsGenerative AI11 APIs33.5Sarj AI Developer APIVoice AIVoice AgentsConversational AIArabic AI27 APIs32.9TaddyPodcastsComicsGraphQLSearch9 APIs31.4Rev AISpeech RecognitionTranscriptionAudio7 APIs30.5Cloverleaf AICompanyGovernmentB2GSales Intelligence1 API29.9TortusCompanyHealthcareArtificial IntelligenceAmbient Clinical Documentation1 API29.7Otter.aiArtificial IntelligenceTranscriptionMeeting Notes1 API28.4AgoraReal-Time EngagementVoiceVideoSignaling11 APIs28.2
Emerging 8 Early or largely undocumented
NuanceCompanySpeech RecognitionConversational AINatural Language Understanding5 APIs24.9Wit.AICompanyNatural Language ProcessingNLPSpeech Recognition1 API23.6VoquillCompanyVoiceDictation22.9Wispr FlowCompanyVoiceDictation21.2SpeechlyCompanySpeech RecognitionVoiceSpoken Language Understanding1 API19.6Useful SensorsCompanyAi MlText-to-Speech17.4MediaCaption APIYouTubeTranscriptionCaptionsSubtitles1 API12.6Sully AIHealthcareHealth TechMedical AIClinical AI1 API11.7
Minimal 4 Almost no public developer surface
IntellaCompanyArtificial IntelligenceVoice AIConversational AI9.8Intella, LTDCompanyArtificial IntelligenceSpeech Recognition9.8Viva TranslateCompanyTranslationReal-Time TranslationTranscription5.3Pop Up ArchiveCompanyAudioTranscription5.0

APIs with this tag (29)

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 Speech To Text APITranscribe audio to text.66.7
Strong 6 Solid coverage with minor gaps
Kensho Scribe Batch API v1Legacy v1 batch transcription endpoint (POST /api/v1/transcription). Superseded by the v2 batch API which d...64.6Kensho Scribe Batch API v2Asynchronous audio and video transcription REST API. POST a media file to start a transcription job, then p...64.6Kensho Scribe Real Time APIReal-time streaming transcription over a WebSocket at wss://scribe.kensho.com/ws. Clients send an Authentic...64.6Corti Speech to Text APIReal-time, bidirectional stateless dictation over WebSocket, returning live transcripts and detected commands.62.4Xdroid Speech to Text APIXdroid Speech To Text API provides a seamless audio transcription service.61.9RingCentral Audio and Video AI APIThe RingCentral Audio and Video AI API exposes speech-to-text, summarization, and conversational analytics ...58.2
Developing 11 Usable, with meaningful gaps to close
Simplismart Speech to Text APIThe Speech to Text API from Simplismart — 2 operation(s) for speech to text.53.3Gladia Live (Real-time) APIWebSocket API for real-time live audio transcription with sub-second latency, supporting multi-language det...52.1Sarvam speechToText APIThe speechToText API from Sarvam — 2 operation(s) for speechtotext.50.4Speechmatics Realtime Transcription APIWebSocket API for low-latency real-time streaming transcription supporting live audio input, speaker diariz...50.4DeepL Voice APIThe DeepL Voice API provides real-time speech transcription and translation. A POST to /v3/voice/realtime i...49.9Reson8 Speech to Text APIRealtime, turn-level, and prerecorded transcription.45.4Kensho ScribeAsynchronous speech-to-text transcription API that turns audio and video into text with high accuracy. Supp...44.6Cartesia Speech-to-Text APIBatch transcription of an audio file of any length.43.0Cartesia STT WebSocket APIRealtime transcription over WebSocket at wss://api.cartesia.ai/stt/websocket. Clients stream raw binary aud...43.0Sarvam AI Speech to Text APIThe Speech to Text API from Sarvam AI — 2 operation(s) for speech to text.41.9Voiceitt WebSockets APISocket.IO WebSockets API for real-time speech recognition. After JWT login via the HTTP API, clients set re...40.4
Thin 9 Limited public surface area
Podcastle TranscriptionTranscription and speech-to-text are Podcastle platform features (multi-language transcription with speaker...38.6Fish Audio APIThe Fish Audio API provides RESTful access to text-to-speech, speech-to-text, voice cloning, and voice mana...38.1Azure AI Speech APISpeech-to-text, text-to-speech, speech translation, and speaker recognition.36.7Argmax Local ServerA local transcription server for macOS that is API-compatible with the Deepgram Speech-to-Text (Live) API, ...34.3elevenlabs Speech to Text APIEndpoints for converting audio into text transcriptions with support for multiple languages and audio formats.33.6Mistral AI Audio Transcription APIAudio transcription API powered by Voxtral for speech-to-text with diarization, word-level timestamps, and ...33.5Taddy Episode Transcripts APIRetrieve episode transcripts with getEpisodeTranscript and the transcriptWithSpeakersAndTimecodes field, in...31.4Otter.ai APIThe Otter.ai REST API enables Enterprise customers to programmatically upload audio and video files for tra...28.4Agora Real-Time Speech-to-Text APIThe Agora Real-Time Speech-to-Text API provides streaming transcription and real-time translation across mu...28.2
Emerging 2 Early or largely undocumented
Nuance Mix ASRaaS gRPC APIAutomatic Speech Recognition as a Service — convert speech to text in real time over a gRPC streaming API (...24.9Media Caption Public APIREST API for fetching public YouTube transcripts synchronously and in bulk, with account/balance endpoints,...12.6

Score breakdown

Frequency
52.7
log-scaled weighted occurrences
Breadth
1.6
spread across providers
Quality lift
46.9
mean composite of providers using it
Cohesion
32.4
strength of nearest seed neighbor

Related tags

Transcription 32 co-occurrences Text-to-Speech 18 co-occurrences Speech Recognition 14 co-occurrences Voice AI 13 co-occurrences Captions 6 co-occurrences NLP 7 co-occurrences Voice Cloning 6 co-occurrences Translation 9 co-occurrences

Where this tag comes from

Api tag29
Provider tag48
Openapi tag7
Openapi op tag14

Cohort brief

Auto-generated

The 58 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
58
all scored
Mean Kin Score
38.7
+18.0 vs catalog 20.7
Mean Agent Readiness
21
+11.3 vs catalog 9.7
Spread
5–66.7
median 39.7 · σ 15.3
How the 58 split by band
Exemplar 1Strong 6Developing 22Thin 17Emerging 8Minimal 4
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Developer Ergonomics 42.5 17.9 +24.6 58
Contract Quality 39.9 17.5 +22.4 58
Operational Transparency 27.6 11.3 +16.3 58
Access Clarity 36.4 22.3 +14.1 58
Discoverability 72.9 60.4 +12.5 58
Contract Governance 13.3 6.4 +6.9 58

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) 40% 16% +24
MCP server (first-party) 17% 7% +10
Agent Skills 0% 0% 0
OAuth scopes 17% 9% +8
Security 95% 88% +7
Arazzo workflows 3% 2% +1
Governance rules 22% 13% +9

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 Inworld AI 66.7
  2. 2 S&P Global 64.6
  3. 3 Corti 62.4
  4. 4 KPN 61.9
  5. 5 RingCentral 58.2
  6. 6 Modulate 57.3
  7. 7 SLNG 56.9
  8. 8 Fireflies.ai 53.9
  9. 9 Simplismart 53.3
  10. 10 Speko 52.2
Top by Agent Readiness
  1. 1 S&P Global 63.7
  2. 2 Sarj AI Developer API 60.4
  3. 3 Kensho 53.2
  4. 4 Fireflies.ai 47.3
  5. 5 RingCentral 41.4
  6. 6 Speko 41.1
  7. 7 KPN 40.8
  8. 8 Allo-Media 39.9
  9. 9 Corti 32.9
  10. 10 Interfaze 32.6
All 58 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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The distribution (Pro) 
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  -H "X-API-Key: $APIS_IO_KEY"

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