established · 0.1

Voices

Score 24.3 / 100 39 providers 40 APIs Search apis.io →
Variants seen in the corpus: Voicesvoices

Providers using this tag (39)

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

Exemplar 1 Complete, well-documented, and agent-ready
Inworld AIArtificial IntelligenceVoiceText-to-SpeechSpeech-to-Text7 APIs66.7
Strong 4 Solid coverage with minor gaps
Amazon PollyArtificial IntelligenceMachine-LearningSpeech SynthesisText-to-Speech5 APIs59.6Anam.aiCompanyAI AvatarsConversational AIReal-Time Video10 APIs58.8JasperCompanyAi MlArtificial IntelligenceContent Generation1 API58.5AnamCompanyArtificial IntelligenceAvatarsConversational AI9 APIs55.4
Developing 16 Usable, with meaningful gaps to close
HeyMiloCompanyRecruitingHiringHuman Resources18 APIs54.0D-IDAI VideoDigital HumansTalking HeadAvatar10 APIs53.2GradiumCompanyAi MlVoice AIText-to-Speech6 APIs50.8KugelAudioVoiceText-to-SpeechSpeech SynthesisVoice AI14 APIs50.7FixieCompanyVoice AIConversational AIReal-Time14 APIs49.8ELBO AI, INCCompanyArtificial IntelligenceVideoText-to-Speech5 APIs49.3NeuphonicText-to-SpeechVoice AIAudioStreaming7 APIs47.8Google Cloud Text-To-SpeechAudioGoogle CloudMachine-LearningSpeech Synthesis2 APIs46.7PhonicCompanyArtificial IntelligenceVoice AIConversational AI10 APIs45.0Smallest AIArtificial IntelligenceText-to-SpeechVoiceReal-Time4 APIs43.1CartesiaArtificial IntelligenceVoice AIText-to-SpeechSpeech-to-Text21 APIs43.0HeyGenArtificial IntelligenceGenerative AIVideoAvatars13 APIs42.8TavusArtificial IntelligenceGenerative AIVideoConversational AI13 APIs40.1ColossyanArtificial IntelligenceVideo GenerationAvatarsText-to-Video5 APIs39.5ListnrArtificial IntelligenceText-to-SpeechTTSVoice3 APIs39.5UberduckArtificial IntelligenceText-to-SpeechTTSVoice4 APIs39.5
Thin 17 Limited public surface area
WellSaid LabsArtificial IntelligenceText-to-SpeechVoiceAudio4 APIs39.0Keyframe LabsCompanyArtificial IntelligenceAvatarsVideo4 APIs38.8ArgilArtificial IntelligenceVideo GenerationAvatarsVoice Cloning5 APIs38.7PodcastleArtificial IntelligenceAudioText-to-SpeechVoice Cloning3 APIs38.6NarakeetText-to-SpeechTTSVoiceAudio4 APIs38.2SpeechifyArtificial IntelligenceText-to-SpeechVoiceSpeech Synthesis2 APIs38.2PlayHTVoiceTTSText-to-SpeechVoice Cloning8 APIs37.7VocodeVoice AIVoice AgentsTelephonyConversational AI9 APIs37.6CreatifyAI AvatarsVideo GenerationAI VideoGenerative AI10 APIs37.4SynthesiaArtificial IntelligenceGenerative AIVideoAvatars7 APIs36.7Together AIArtificial IntelligenceLLMInferenceFoundation Models28 APIs35.1International Business MachinesArtificial IntelligenceCloudEnterpriseIBM22 APIs34.7elevenlabs22 APIs33.6RespeecherVoice AIVoice CloningSpeech to SpeechText-to-Speech17 APIs33.0Sarj AI Developer APIVoice AIVoice AgentsConversational AIArabic AI27 APIs32.9Inworld AIArtificial IntelligenceVoiceCharactersGames10 APIs31.9Camb.AIArtificial IntelligenceText-to-SpeechDubbingTranslation6 APIs31.8
Emerging 1 Early or largely undocumented
Amazon Web ServicesAmazonCloudNetworkIndex1804 APIs16.7

APIs with this tag (40)

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 Voices APIVoice cloning, design, and lifecycle.66.7
Strong 4 Solid coverage with minor gaps
Amazon Polly Voices APIThe Voices API from Amazon Polly — 1 operation(s) for voices.59.6Anam.ai Voices APIThe Voices API from Anam.ai — 3 operation(s) for voices.58.8Jasper APIThe Jasper API brings generative AI into your platform — generate on-brand content via commands and templat...58.5Anam Voices APIThe Voices API from Anam — 2 operation(s) for voices.55.4
Developing 17 Usable, with meaningful gaps to close
HeyMilo Voices APIBrowse the workspace voice registry for AI interviewer voices.54.0D-ID Voices APIList available TTS voices53.2Gradium Voices APIManage custom voice clones50.8KugelAudio Voices APIThe Voices API from KugelAudio — 6 operation(s) for voices.50.7Fixie voices APIThe voices API from Fixie — 4 operation(s) for voices.49.8ELBO AI, INC Voices APIThe Voices API from ELBO AI, INC — 1 operation(s) for voices.49.3Neuphonic Voices APIThe Voices API from Neuphonic — 2 operation(s) for voices.47.8Google Cloud Text-To-Speech Voices APIThe Voices API from Google Cloud Text-To-Speech — 1 operation(s) for voices.46.7Phonic voices APIThe voices API from Phonic — 2 operation(s) for voices.45.0Smallest AI Voices APIList prebuilt voices and manage cloned voices.43.1Cartesia Voices APIVoice catalog management and voice cloning.43.0HeyGen APIThe HeyGen REST API exposes video generation, avatar management, text-to-speech (Starfish), video translati...42.8HeyGen Voices APIVoice listing and voice-management endpoints.42.8Tavus Voices APIThe Voices API from Tavus — 1 operation(s) for voices.40.1Colossyan Voices APIList available AI voices.39.5Listnr Voices APIList the AI voices available on Listnr.39.5Uberduck Voices APIList, filter, and clone voices.39.5
Thin 17 Limited public surface area
WellSaid Labs Voices APIDiscover available voice avatars.39.0Keyframe Labs Voices APIThe Voices API from Keyframe Labs — 2 operation(s) for voices.38.8Argil Voices APIClone, list, and sync voices.38.7Podcastle Voices APIBrowse the voice library and create instant voice clones.38.6Narakeet Voices APIList the voices available for audio and video production.38.2Speechify Voices APIThe Voices API from Speechify — 2 operation(s) for voices.38.2PlayAI Text-to-Speech APIThe PlayAI Text-to-Speech API converts text into natural, human-like speech using the PlayDialog 1.0, Dialo...37.7PlayHT Voices APIPrebuilt voice catalog.37.7Vocode Voices APIThe Voices API from Vocode — 4 operation(s) for voices.37.6Creatify Voices APICatalog of AI voices and accents.37.4Together AI Voices APIThe Voices API from Together AI — 1 operation(s) for voices.35.1International Business Machines Voices APIManage available voices.34.7elevenlabs Voices APIEndpoints for managing voices including listing, creating, editing, and deleting voices in the library.33.6Respeecher voices APIThe voices API from Respeecher — 4 operation(s) for voices.33.0Sarj AI Developer API Voices APIThe Voices API from Sarj AI Developer API — 3 operation(s) for voices.32.9Inworld AI Voices APIVoice catalog and custom voice management31.9Camb.AI Voices APIDiscover, clone, design, and manage voices.31.8
Emerging 1 Early or largely undocumented
Amazon Web Services Voices APIThe Voices API from Amazon Web Services — 1 operation(s) for voices.16.7

Score breakdown

Frequency
54.5
log-scaled weighted occurrences
Breadth
1.1
spread across providers
Quality lift
52.0
mean composite of providers using it
Cohesion
0.0
strength of nearest seed neighbor

Related tags

Voice Cloning 15 co-occurrences Text-to-Speech 22 co-occurrences TTS 10 co-occurrences Speech Synthesis 7 co-occurrences Avatars 9 co-occurrences Speech to Speech 5 co-occurrences Voice Agents 7 co-occurrences Personas 5 co-occurrences

Where this tag comes from

Api tag39
Provider tag1
Openapi tag37
Openapi op tag127

Cohort brief

Auto-generated

The 39 providers in the APIs.io catalog tagged Voices, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
39
all scored
Mean Kin Score
42.7
+22.0 vs catalog 20.7
Mean Agent Readiness
26.6
+16.9 vs catalog 9.7
Spread
16.7–66.7
median 39.5 · σ 9.6
How the 39 split by band
Exemplar 1Strong 4Developing 16Thin 17Emerging 1Minimal 0
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 57.9 17.5 +40.4 39
Operational Transparency 30.2 11.3 +18.9 39
Access Clarity 41.2 22.3 +18.9 39
Developer Ergonomics 35.5 17.9 +17.6 39
Discoverability 75.5 60.4 +15.1 39
Contract Governance 11.4 6.4 +5 39

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) 28% 16% +12
MCP server (first-party) 13% 7% +6
Agent Skills 0% 0% 0
OAuth scopes 5% 9% -4
Security 97% 88% +9
Arazzo workflows 3% 2% +1
Governance rules 36% 13% +23

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 Amazon Polly 59.6
  3. 3 Anam.ai 58.8
  4. 4 Jasper 58.5
  5. 5 Anam 55.4
  6. 6 HeyMilo 54
  7. 7 D-ID 53.2
  8. 8 Gradium 50.8
  9. 9 KugelAudio 50.7
  10. 10 Fixie 49.8
Top by Agent Readiness
  1. 1 Sarj AI Developer API 60.4
  2. 2 HeyMilo 52.3
  3. 3 Jasper 51.5
  4. 4 ELBO AI, INC 43.9
  5. 5 Phonic 40.8
  6. 6 Anam.ai 36.2
  7. 7 Together AI 33.5
  8. 8 KugelAudio 28.8
  9. 9 Amazon Polly 28.1
  10. 10 HeyGen 26.5
All 39 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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  -H "X-API-Key: $APIS_IO_KEY"

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