emerging · 2.3

Voice AI

Score 22.7 / 100 106 providers 13 APIs Search apis.io →
Variants seen in the corpus: Voice AIvoice AIvoice-ai

Providers using this tag (106)

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

Exemplar 2 Complete, well-documented, and agent-ready
RegalArtificial IntelligenceAI AgentsContact Center10 APIs79.6VapiArtificial IntelligenceVoice AgentsConversational AI15 APIs75.1
Strong 10 Solid coverage with minor gaps
GridspaceCompanyConversational AIVoice Agents3 APIs65.3PyannoteAICompanyAi DataSpeech RecognitionSpeaker Diarization1 API61.4ModulateCompanyArtificial IntelligenceSpeech-to-Text11 APIs57.3SLNGCompanySpeechVoiceSpeech-to-Text15 APIs56.9Observe.AICompanyAi AppsContact CenterConversation Intelligence1 API56.6Suki AIHealthcareAmbient AIClinical Documentation10 APIs56.3ThoughtlyChat AIConversational AIAI Agents4 APIs56.0CovalCompanyAI AgentsTesting25 APIs55.3VOYGRCompanyLocation IntelligencePOI DataData Enrichment2 APIs55.0VoiceGenieCompanyConversational AISales Automation2 APIs54.3
Developing 30 Usable, with meaningful gaps to close
HeyMiloCompanyRecruitingHiringHuman Resources18 APIs54.0ReplicantCompanyContact CenterConversational AICustomer Service1 API52.6ChatsimpleCompanyAI AgentsConversational AIChatbots2 APIs52.3SpekoVoiceSpeech-to-TextText-to-Speech4 APIs52.2AquantCompanyArtificial IntelligenceAgentsField Service2 APIs51.2GradiumCompanyAi MlText-to-Speech6 APIs50.8KugelAudioVoiceText-to-SpeechSpeech Synthesis14 APIs50.7SpeechmaticsSpeech RecognitionSpeech-to-TextTranscriptionReal-Time Transcription7 APIs50.4Listen LabsCompanyArtificial IntelligenceMarket ResearchCustomer Research1 API50.0BluejayCompanyArtificial IntelligenceAI Agents60 APIs49.8FixieCompanyConversational AIReal-Time14 APIs49.8DeepgramArtificial IntelligenceSpeech-to-TextText-to-SpeechTranscription12 APIs49.2Tadeus APIResearchInterviewsWorkforce1 API49.1BolnaCompanyArtificial IntelligenceConversational AI1 API48.8Prosper AICompanyHealthcareRevenue Cycle Management6 APIs48.8PhonelyArtificial IntelligenceVoice AgentsConversational AI2 APIs48.7NeuphonicText-to-SpeechAudioStreaming7 APIs47.8CognigyCompanyConversational AIAgentic AIContact Center1 API47.5Allo-MediaCompanyAi DataSpeech RecognitionSpeech-to-Text4 APIs47.2SanasCompanySpeech AIAccent Translation2 APIs46.6Reson8Speech RecognitionSpeech-to-TextASR3 APIs45.4ForethoughtArtificial IntelligenceCustomer-SupportCustomer ServiceGenerative AI3 APIs45.0PhonicCompanyArtificial IntelligenceConversational AI10 APIs45.0AvocaCompanyArtificial IntelligenceConversational AI8 APIs44.0HappyrobotAI AgentsAgent OrchestrationConversational AI6 APIs43.5FiniCompanyArtificial IntelligenceAI AgentsCustomer-Support9 APIs43.4CartesiaArtificial IntelligenceText-to-SpeechSpeech-to-Text21 APIs43.0VeritusCompanyFintechConsumer LendingCollection4 APIs42.1KrispCompanyArtificial IntelligenceSpeech2 APIs41.7DailyReal-TimeWebRTCVideoAudio15 APIs41.5
Thin 16 Limited public surface area
DaptaCompanyAI AgentsConversational AI38.4VocodeVoice AgentsTelephonyConversational AI9 APIs37.6InfinitusCompanyArtificial IntelligenceHealthcare1 API36.2PolyaiCompanyConversational AICustomer Service1 API35.8GetVocalCompanyArtificial IntelligenceConversational AI3 APIs35.7CovalArtificial IntelligenceAgentsSimulation12 APIs35.5Glia (fka SaleMove)CompanyCustomer ServiceCustomer-SupportDigital Customer Service1 API34.0Symbl.aiCompanyConversation IntelligenceSpeech-to-Text34.0LiberateCompanyArtificial IntelligenceInsuranceInsurtech1 API33.5ai-cousticsCompanyAi MlAudioSpeech Enhancement1 API33.3RespeecherVoice CloningSpeech to SpeechText-to-Speech17 APIs33.0Sarj AI Developer APIVoice AgentsConversational AIArabic AI27 APIs32.9QuiqCompanyCustomer ExperienceConversational AIContact Center1 API30.8CrestaArtificial IntelligenceContact CenterContact Center AICCaaS1 API30.5Liberate InnovationsCompanyInsuranceInsurtechArtificial Intelligence2 APIs30.4Samora AICompanyVoice AgentsConversational AI3 APIs29.0
Emerging 29 Early or largely undocumented
BaltoCompanyArtificial IntelligenceContact CenterConversation Intelligence1 API24.9DonnaCompanyArtificial IntelligenceSalesField Sales22.5EliseAICompanyArtificial IntelligenceConversational AIProperty Management22.1RealWearCompanyHardwareWearables19.3SoundHoundConversational AIMusic RecognitionAudio Intelligence2 APIs19.3MihupCompanyConsumerSpeech Recognition18.8Ellipsis HealthCompanyHealthcareMental HealthArtificial Intelligence18.7GigaCompanyArtificial IntelligenceAI Agents18.5Patientdesk.aiCompanyHealthcareDentalArtificial Intelligence18.5Champ AiCompanyArtificial IntelligenceAI AgentsAutomation18.2BasataCompanyHealthcareArtificial IntelligenceAI Agents17.8RevionCompanyArtificial IntelligenceAutomotiveDealership Service17.1Attuned IntelligenceCompanyArtificial IntelligenceHealthcare16.8EchoLeadsAI voice salesAI Voice Agentscold calling automationAI SDR1 API16.8PolimorphicCompanyGovTechGovernmentArtificial Intelligence16.0Slang AiCompanyRestaurantConversational AI15.9CallDeskCompanyConversational AIContact Center15.7ConverseNowCompanyConversational AIRestaurant15.4Callab AIConversational AITelephonyContact Center1 API15.2Replica StudiosCompanyVoiceText-to-SpeechSpeech to Speech1 API14.7Observe.AICompanyContact CenterConversation IntelligenceCustomer Service14.5HostieCompanyRestaurantHospitalityConversational AI14.4MaiCallCompanyDebt CollectionCollection13.8KnownCompanyConsumerDatingMobile13.5HousewhisperCompanyReal-EstateArtificial IntelligenceAI Assistant13.3Hippocratic AIHealthcareGenerative AIHealthcare AgentsClinical AI13.0MurphyCompanyFintechArtificial IntelligenceDebt Collection12.1Vocca AiCompanyHealthcareConversational AI12.1MeelaCompanyAi AppsArtificial Intelligence11.6
Minimal 19 Almost no public developer surface
MiaCompanyArtificial IntelligenceConversational AI10.8Kardome TechnologyCompanySpeech RecognitionAutomotive10.6Standard PracticeCompanyHealthcareRevenue Cycle Management10.6LanceCompanyArtificial IntelligenceAI AgentsHospitality10.5AivarCompanyAi MlArtificial IntelligenceAI Agents10.2IntellaCompanyArtificial IntelligenceConversational AI9.8Intella, LTDCompanyArtificial IntelligenceSpeech RecognitionSpeech-to-Text9.8Solda.aiCompanyArtificial IntelligenceSales9.7Level AIArtificial IntelligenceContact CenterCustomer ExperienceConversational Intelligence9.1VerdexCompanyHealthcareClinical DocumentationArtificial Intelligence8.6NeticCompanyArtificial IntelligenceAutonomous AgentsHome Services7.6PraxiPalCompanyHealthcareArtificial Intelligence7.1Fluent.aiCompanySpeech RecognitionEmbedded6.4NumaCompanyVertical AIAutomotiveArtificial Intelligence6.4Presto AutomationRestaurantDrive-ThruAutomation6.4AtextoCompanySpeech RecognitionTranscriptionData Labeling5.0ConverzAICompanyArtificial IntelligenceRecruitingRecruitment Automation5.0TalentplutoCompanyRecruitingHiringTalent5.0WaycoCompanyLegal TechArtificial IntelligenceHealthcare2.3

APIs with this tag (13)

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 →

Strong 2 Solid coverage with minor gaps
pyannoteAI APIREST API for speaker diarization, speaker identification with voiceprints, and speech-to-text orchestration...61.4Voygr Calls APIProgrammatic outbound phone calls executed by an AI voice agent. Submit a task either as a plain-language b...55.0
Developing 6 Usable, with meaningful gaps to close
Aquant Conversation Platform (VoiceAI) APIThe Aquant Conversation Platform (ACP) API powers Voice AI and web chat with Aquant's service agents. Clien...51.2Deepgram Voice Agent APIThe Deepgram Voice Agent API is an end-to-end solution that combines speech-to-text, LLM orchestration, and...49.2Tadeus Integration APIREST API to create interview templates and campaigns, invite participants singly or in bulk, create anonymo...49.1Bolna Voice AI APIREST API for building and operating conversational voice AI agents — create and manage agents, place outbou...48.8Happyrobot Public APIThe current Happyrobot Public API (v2) — 205 operations over 162 paths, described by a live OpenAPI 3.0.3 d...43.5Pipecat Cloud (Daily Bots) APIREST API and SDKs for deploying and managing voice AI agents built with the open-source Pipecat framework o...41.5
Thin 3 Limited public surface area
Infinitus Platform APIThe customer-gated Infinitus backend API. Infinitus' own AI Agent Security Guide instructs customers to all...36.2PolyAI Platform APIBuild, run and observe PolyAI voice and chat agents from your own systems. Three REST API families (Agents,...35.8ai-coustics SDKReal-time speech-enhancement SDK (Quail, Rook, Quail VAD, Quail Voice Focus, Tyto) with a JWT token-minting...33.3
Emerging 2 Early or largely undocumented
Houndify Voice AI APIThe Houndify platform provides HTTP and WebSocket APIs that accept text or audio queries and return actiona...19.3Callab AI APICallab AI's REST API, documented at docs.callab.ai/api-reference, is organized around REST principles with ...15.2

Score breakdown

Frequency
57.2
log-scaled weighted occurrences
Breadth
2.9
spread across providers
Quality lift
38.1
mean composite of providers using it
Cohesion
0.0
strength of nearest seed neighbor

Related tags

Conversational AI 51 co-occurrences Speech Recognition 19 co-occurrences Contact Center 26 co-occurrences Voice Agents 14 co-occurrences Telephony 17 co-occurrences Speech-to-Text 13 co-occurrences Text-to-Speech 13 co-occurrences Voices 10 co-occurrences

Where this tag comes from

Provider tag106
Api tag13

Cohort brief

Auto-generated

The 106 providers in the APIs.io catalog tagged Voice AI, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
106
all scored
Mean Kin Score
31.4
+10.7 vs catalog 20.7
Mean Agent Readiness
16.1
+6.4 vs catalog 9.7
Spread
2.3–79.6
median 33 · σ 18.7
How the 106 split by band
Exemplar 2Strong 10Developing 30Thin 16Emerging 29Minimal 19
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Access Clarity 38.7 22.3 +16.4 106
Developer Ergonomics 30.2 17.9 +12.3 106
Contract Quality 27.1 17.5 +9.6 106
Discoverability 67 60.4 +6.6 106
Operational Transparency 17.7 11.3 +6.4 106
Contract Governance 12.5 6.4 +6.1 106

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) 34% 16% +18
MCP server (first-party) 21% 7% +14
Agent Skills 0% 0% 0
OAuth scopes 8% 9% -1
Security 99% 88% +11
Arazzo workflows 4% 2% +2
Governance rules 10% 13% -3

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 Regal 79.6
  2. 2 Vapi 75.1
  3. 3 Gridspace 65.3
  4. 4 PyannoteAI 61.4
  5. 5 Modulate 57.3
  6. 6 SLNG 56.9
  7. 7 Observe.AI 56.6
  8. 8 Suki AI 56.3
  9. 9 Thoughtly 56
  10. 10 Coval 55.3
Top by Agent Readiness
  1. 1 Sarj AI Developer API 60.4
  2. 2 HeyMilo 52.3
  3. 3 Listen Labs 52.2
  4. 4 Happyrobot 51.6
  5. 5 Prosper AI 46.9
  6. 6 Regal 46.8
  7. 7 Aquant 46.4
  8. 8 Coval 43.6
  9. 9 Speko 41.1
  10. 10 PyannoteAI 40.9
All 106 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.

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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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/voice-ai"
All tags 
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As a scored cohort 
curl "https://apis.io/api/v1/cohorts/tag/voice-ai"
The distribution (Pro) 
curl "https://apis.io/api/v1/cohorts/tag/voice-ai/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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