emerging · 1.0 market domain

Voice AI

Score 23.1 / 100 116 providers 10 APIs Search apis.io →

Providers using this tag (116)

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

Exemplar 2 Complete, well-documented, and agent-ready
ElevenLabsArtificial IntelligenceText-to-SpeechSpeech-to-TextVoice12 APIs81.8RegalArtificial IntelligenceAI AgentsContact Center6 APIs71.6
Strong 10 Solid coverage with minor gaps
VeraDialAI ReceptionistBusiness PhoneTelephony2 APIs66.1PyannoteAICompanyAi DataSpeech RecognitionSpeaker Diarization2 APIs61.5DialNexaAI AgentsTelephonyLead Qualification2 APIs61.2SynthflowVoiceVoice AgentsNo-CodeTelephony1 API60.0GridspaceCompanyConversational AIVoice Agents1 API59.3FixieCompanyConversational AIReal-Time1 API57.9ModulateCompanyArtificial IntelligenceSpeech-to-Text11 APIs55.7Observe.AICompanyAi AppsContact CenterConversation Intelligence1 API54.9ReplicantCompanyContact CenterConversational AICustomer Service2 APIs54.8Suki AIHealthcareAmbient AIClinical Documentation3 APIs54.4
Developing 38 Usable, with meaningful gaps to close
SLNGCompanySpeechVoiceSpeech-to-Text7 APIs53.6ChatsimpleCompanyAI AgentsConversational AIChatbots2 APIs53.5VOYGRCompanyLocation IntelligencePOI DataData Enrichment1 API53.4VoiceGenieCompanyConversational AISales Automation1 API52.4PhonicCompanyArtificial IntelligenceConversational AI1 API51.7CovalCompanyAI AgentsTesting20 APIs51.6ThoughtlyChat AIConversational AIAI Agents1 API51.6Allo-MediaCompanyAi DataSpeech RecognitionSpeech-to-Text4 APIs50.9HeyMiloCompanyRecruitingHiringHuman Resources1 API50.8BluejayCompanyArtificial IntelligenceAI Agents1 API50.5SpekoVoiceSpeech-to-TextText-to-Speech1 API50.5BolnaCompanyArtificial IntelligenceConversational AI1 API49.9Listen LabsCompanyArtificial IntelligenceMarket ResearchCustomer Research2 APIs49.6VeritusCompanyFintechConsumer LendingCollection1 API49.5iCallAgent Public APIvoice ai assistantConversational AIVoice Agents1 API49.3SpeechmaticsSpeech RecognitionSpeech-to-TextTranscriptionReal-Time Transcription2 APIs48.6SanasCompanySpeech AIAccent Translation2 APIs47.8GradiumCompanyAi MlText-to-Speech1 API47.7DailyDailyReal-TimeWebRTCVideo1 API47.5CognigyCompanyConversational AIAI AgentsContact Center1 API47.0Tadeus APIResearchInterviewsWorkforce2 APIs46.8KugelAudioVoiceText-to-SpeechSpeech Synthesis1 API46.5DeepgramArtificial IntelligenceSpeech-to-TextText-to-SpeechTranscription3 APIs46.1HappyrobotAI AgentsAgent OrchestrationConversational AI2 APIs46.1PhonelyArtificial IntelligenceVoice AgentsConversational AI2 APIs45.5Prosper AICompanyHealthcareRevenue Cycle Management1 API45.2AquantCompanyArtificial IntelligenceAgentsField Service2 APIs45.0SuperDialCompanyHealthcareRevenue Cycle Management1 API44.4NeuphonicText-to-SpeechAudioStreaming1 API43.9FiniCompanyArtificial IntelligenceAI AgentsCustomer Support1 API43.8ForethoughtArtificial IntelligenceCustomer SupportCustomer ServiceGenerative AI2 APIs42.7KrispCompanyArtificial IntelligenceSpeech1 API42.3PypestreamCompanyConversational AIAI AgentsContact Center7 APIs42.1AssemblyAIArtificial IntelligenceAudioSpeechTranscription1 API41.8CartesiaArtificial IntelligenceText-to-SpeechSpeech-to-Text1 API41.4Sarj AI Developer APIVoice AgentsConversational AIArabic AI4 APIs41.3AvocaCompanyArtificial IntelligenceConversational AI1 API41.2Retell AIArtificial IntelligenceVoiceAgentsReal-Time1 API39.9
Thin 18 Limited public surface area
DaptaCompanyAI AgentsConversational AI38.2PolyaiCompanyConversational AICustomer Service1 API35.5VapiArtificial IntelligenceVoiceAgentsReal-Time1 API35.5Symbl.aiCompanyConversation IntelligenceSpeech-to-Text35.4ai-cousticsCompanyAi MlAudioSpeech Enhancement1 API34.6VocodeVoice AgentsTelephonyConversational AI1 API34.0Liberate InnovationsCompanyInsuranceInsurtechArtificial Intelligence1 API33.0Reson8Speech RecognitionSpeech-to-TextASR3 APIs32.7Bland AIArtificial IntelligenceVoiceAgentsPhone1 API32.5InfinitusCompanyArtificial IntelligenceHealthcare1 API31.9CrestaArtificial IntelligenceContact CenterContact Center AICCaaS1 API31.7LiberateCompanyArtificial IntelligenceInsuranceInsurtech1 API31.7QuiqCompanyCustomer ExperienceConversational AIContact Center1 API31.6CovalArtificial IntelligenceAgentsSimulation1 API31.5GetVocalCompanyArtificial IntelligenceConversational AI1 API31.5aiOlaSpeech RecognitionSpeech-to-TextText-to-Speech3 APIs30.6RespeecherVoice CloningSpeech to SpeechText-to-Speech1 API29.7p0stmanAI AgentsMCPA2AAgentic Web3 APIs27.7
Emerging 30 Early or largely undocumented
Samora AICompanyVoice AgentsConversational AI1 API26.1BaltoCompanyArtificial IntelligenceContact CenterConversation Intelligence1 API25.6SoundHoundConversational AIMusic RecognitionAudio Intelligence2 APIs23.6DonnaCompanyArtificial IntelligenceSalesField Sales23.2MihupCompanyConsumerSpeech Recognition19.8GigaCompanyArtificial IntelligenceAI Agents19.2EliseAICompanyArtificial IntelligenceConversational AIProperty Management18.8RealWearCompanyHardwareWearables18.2Ellipsis HealthCompanyHealthcareMental HealthArtificial Intelligence17.6Champ AiCompanyArtificial IntelligenceAI AgentsAutomation17.4Patientdesk.aiCompanyHealthcareDentalArtificial Intelligence17.4RevionCompanyArtificial IntelligenceAutomotiveDealership Service17.2EchoLeadsAI voice salesAI Voice Agentscold calling automationAI SDR1 API17.0Slang AiCompanyRestaurantConversational AI16.9BasataCompanyHealthcareArtificial IntelligenceAI Agents16.7CallDeskCompanyConversational AIContact Center16.7ConverseNowCompanyConversational AIRestaurant16.6Attuned IntelligenceCompanyArtificial IntelligenceHealthcare16.0Callab AIConversational AITelephonyContact Center1 API15.9PolimorphicCompanyGovTechGovernmentArtificial Intelligence15.1MaiCallCompanyDebt CollectionCollection14.1HostieCompanyRestaurantHospitalityConversational AI14.0Replica StudiosCompanyVoiceText-to-SpeechSpeech to Speech1 API13.8HousewhisperCompanyReal EstateArtificial IntelligenceAI Assistant13.4KnownCompanyConsumerDatingMobile12.9MurphyCompanyFintechArtificial IntelligenceDebt Collection12.2Hippocratic AIHealthcareGenerative AIHealthcare AgentsClinical AI12.1Vocca AiCompanyHealthcareConversational AI11.8Standard PracticeCompanyHealthcareRevenue Cycle Management11.4MeelaCompanyAi AppsArtificial Intelligence11.3
Minimal 18 Almost no public developer surface
MiaCompanyArtificial IntelligenceConversational AI10.7LanceCompanyArtificial IntelligenceAI AgentsHospitality10.6Kardome TechnologyCompanySpeech RecognitionAutomotive10.0AivarCompanyAi MlArtificial IntelligenceAI Agents9.6IntellaCompanyArtificial IntelligenceConversational AI9.4Solda.aiCompanyArtificial IntelligenceSales9.1Level AIArtificial IntelligenceContact CenterCustomer ExperienceConversational Intelligence8.0PraxiPalCompanyHealthcareArtificial Intelligence7.1VerdexCompanyHealthcareClinical DocumentationArtificial Intelligence6.8NeticCompanyArtificial IntelligenceAutonomous AgentsHome Services6.4Fluent.aiCompanySpeech RecognitionEmbedded4.8Presto AutomationRestaurantDrive-ThruAutomation4.8NumaCompanyVertical AIAutomotiveArtificial Intelligence4.7TalentplutoCompanyRecruitingHiringTalent3.4WaycoCompanyLegal TechArtificial IntelligenceHealthcare3.1ConverzAICompanyArtificial IntelligenceRecruitingRecruitment Automation2.8Yellow.aiCompanyArtificial IntelligenceConversational AIChatbots2.5AtextoCompanySpeech RecognitionTranscriptionData Labeling0.0

APIs with this tag (10)

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 →

Developing 4 Usable, with meaningful gaps to close
Voygr Calls APIProgrammatic outbound phone calls executed by an AI voice agent. Submit a task either as a plain-language b...53.4Bolna Voice AI APIREST API for building and operating conversational voice AI agents — create and manage agents, place outbou...49.9Pipecat Cloud (Daily Bots) APIREST API and SDKs for deploying and managing voice AI agents built with the open-source Pipecat framework o...47.5Deepgram Voice Agent APIThe Deepgram Voice Agent API is an end-to-end solution that combines speech-to-text, LLM orchestration, and...46.1
Thin 4 Limited public surface area
PolyAI Platform APIBuild, run and observe PolyAI voice and chat agents from your own systems. Three REST API families (Agents,...35.5ai-coustics SDKReal-time speech-enhancement SDK (Quail, Rook, Quail VAD, Quail Voice Focus, Tyto) with a JWT token-minting...34.6Infinitus Platform APIThe customer-gated Infinitus backend API. Infinitus' own AI Agent Security Guide instructs customers to all...31.9aiOla Text to Speech APILow-latency speech synthesis with multi-language, multi-voice support and jargon-pronunciation conditioning...30.6
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...23.6Callab AI APICallab AI's REST API, documented at docs.callab.ai/api-reference, is organized around REST principles with ...15.9

Score breakdown

Frequency
57.6
log-scaled weighted occurrences
Breadth
3.0
spread across providers
Quality lift
39.5
mean composite of providers using it
Cohesion
0.0
strength of nearest seed neighbor

Where this tag sits

116 providers carry this tag directly, and 230 counting the 4 narrower tags below and the 1 beneath them — 114 more to reach.

Voice broader Voice Agents 33 providers Speech-to-Text 50 providers Text-to-Speech 66 providers Speech Recognition 53 providers

Related tags

Conversational AI 58 co-occurrences Voice Agents 20 co-occurrences Speech Recognition 19 co-occurrences Contact Center 25 co-occurrences Telephony 17 co-occurrences Speech-to-Text 15 co-occurrences Text-to-Speech 14 co-occurrences

Where this tag comes from

Provider tag116
Api tag10

Cohort brief

Auto-generated

The 114 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
114
all scored
Mean Kin Score
32.8
+9.9 vs catalog 22.9
Mean Agent Readiness
19.3
+7.4 vs catalog 11.9
Spread
2.8–81.8
median 32.9 · σ 18.3
How the 114 split by band
Exemplar 2Strong 10Developing 38Thin 18Emerging 30Minimal 16
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Access Clarity 40.3 26.5 +13.8 114
Developer Ergonomics 34.4 23.2 +11.2 114
Contract Quality 27.5 17.6 +9.9 114
Discoverability 64.4 58.1 +6.3 114
Operational Transparency 19.6 13.7 +5.9 114
Contract Governance 9.9 6.3 +3.6 114

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) 30% 14% +16
MCP server (first-party) 28% 12% +16
Agent Skills 0% 0% 0
OAuth scopes 11% 11% 0
Security 100% 98% +2
Arazzo workflows 3% 2% +1
Governance rules 13% 14% -1

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 81.8
  2. 2 Regal 71.6
  3. 3 VeraDial 66.1
  4. 4 PyannoteAI 61.5
  5. 5 DialNexa 61.2
  6. 6 Synthflow 60
  7. 7 Gridspace 59.3
  8. 8 Fixie 57.9
  9. 9 Modulate 55.7
  10. 10 Observe.AI 54.9
Top by Agent Readiness
  1. 1 Sarj AI Developer API 67.3
  2. 2 DialNexa 61.8
  3. 3 Speko 60.5
  4. 4 Coval 59.8
  5. 5 Phonic 56.9
  6. 6 Synthflow 54
  7. 7 Bolna 53.6
  8. 8 ElevenLabs 52.7
  9. 9 Regal 52.3
  10. 10 HeyMilo 52.3
All 116 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 5 October 2026, across 29093 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

One button, every client — Claude, Cursor, VS Code and the rest.

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 →

Call it yourself

curl for this page
This tag 
curl "https://apis.io/api/v1/tags/voice-ai"
All tags 
curl "https://apis.io/api/v1/tags?limit=25"
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"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.