Voice
Workflows using this tag
Twilio Validate a Number then Send a Message · Twilio
Twilio Trigger a Studio Flow Execution · Twilio
Twilio Create a TaskRouter Workspace and Task · Twilio
Twilio Create a Conversation, Add a Participant, and Send a Message · Twilio
Twilio Reply to a Conversation and Track Delivery Receipts · Twilio
Twilio Create a Conversation and Attach a Scoped Webhook · Twilio
Twilio Create a Call Queue and Confirm It · Twilio
Twilio Schedule a Message and Cancel It Before Send · Twilio
Variants seen in the corpus:
VoicesVoice
Providers using this tag (272)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Exemplar 18 Complete, well-documented, and agent-ready
Strong 45 Solid coverage with minor gaps
BandwidthSyllableCallForMeSLNGCall2MeCM.comZavuVoxplokreatorflow-aiUnifonicSynthflowyappy-bizSpekoBright PatternHatchSimple AIRingCentralFamulorCosVoiceKugelAudioWispr AISaperlyGoogle VoiceSarvamAgentPhonevolai-czApptotoKPNThe Mobile First CompanySpruce HealthOrange BusinessTalkdeskNeutrino APISwisscomNextivaActionpowerKixieoruk-aiAmazonKore.aiTata CommunicationsAAA AIAgentLineQuoTeliax
Developing 57 Usable, with meaningful gaps to close
OutRivalDibattoSendbirddialogbrain-comGladlyCallfireneurall-ioDeepdubBirdSonde HealthDailyDiscordAlgebras AIDeepgramDialKaleyraAvochatoseven.ioKanemeAssemblyAIArpeggi Labsspicyapi-comMicrosoft Skypecanarics-comKotobaCisco Voice PortalELAV8.aiShapesVoiceittKeyframe LabsInfiVoiceFlowSpeechGliaFineVoice (Fineshare)Whippyheard-devTelgorithmAlianzaClawdCallRoute MobileReliance JioNetomiPuppetryBharti AirtelMoore ThreadsDelphiNuanceengageSPARKleadfriendly-comSpeechmaticsEpic GamesRokidUnisoundHeidi HealthConcentrix11xBurner
Thin 57 Limited public surface area
Detectif.aiPlivodazieEasyVoiceSmallest AIAgoraQuarterzipJustCallCartesiaKalpa LabsRetell AIWellSaid LabsListnrLiveKitRainbowVoiceflowMiniMaxCallSimpleCometChatVapiFish AudioSynthesiaNarakeetMoviusBland AIResemble AIIdiolect AIInworld AIHume AISMSAPIUberduckMurfClickSendPipecatExotelBrivvyDyteUJETCustom Chat API | MirrorFlyLayercodeChorus KeepsakeSpeechifySobotHumMatchAI AnyoneNablaUnreal SpeechLemonflowJitsiSonosDialpadTenfoldAircall/call-meRingCaptcha (ThriveCom)PoshOddcast
Emerging 58 Early or largely undocumented
46elksDeyahoCobalt SpeechGiggyRinglyÉtincelHigh FidelityTin CanVoquillVoxerAfrica's TalkingOrbitelSynervozJooVoiceGoNoGoAfilnetChimelabsCalmidowaply-onlineMiravoiceSierraUare.aiAnyvoicePindrop SecurityYampaDecagonLatoAgentifAIReadSpeakerStoryboardActium HealthReplica StudiosiBasisIntermediaNurixVolleyRobylon AIDavid AIAgentSeaScaled CognitionWit.AISingtelRev AIBesidecallagent.proRimeMaxim AIAitocallmagicteams-aiOpenEvidenceUseful SensorsDialerSalientOutverseFlossyAltira HealthClubhouseAssindo
Minimal 36 Almost no public developer surface
TJM LabsZymblyDialupParloagetriffOpen Voice NetworkSandbarHyroVoxeetTalk Labsop.aiRcomSnipsClubhousevoiceSonanticAllegiance TelecomBrooktrout TechnologyDrivetimeinbilinPlayHTSpeechlyTalkoToyTalkPingerBT GroupCall MeLightberryAtmee.aiInsurifyDaero GroupHUM IndustriesClementineConexant SystemsFocal CommunicationsOrativeTalkray
Unrated 1 Not yet scored
APIs with this tag (186)
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 29 Complete, well-documented, and agent-ready
Twilio Voice APIThe Voice API from Twilio — 10 operation(s) for voice.Salesforce Service Cloud Voice APIThe Salesforce Service Cloud Voice API provides Telephony Integration REST API and Voice Toolkit API for pr...elevenlabs Voices APIEndpoints for managing voices including listing, creating, editing, and deleting voices in the library.OpenAI Agents SDKThe OpenAI Agents SDK is a lightweight framework for building multi-agent workflows in Python and TypeScrip...OpenAI Realtime APIThe Realtime API from OpenAI — 9 operation(s) for realtime.Amazon Voice ID APIAmazon Connect Voice ID provides real-time caller authentication and fraud risk detection to make voice int...Corebee Voice APITwo-party telephony bridge. The voice configuration operations (/voice/bridge/voices, /voices/{voice_id}, /...Telesign Voice APIThe Voice API from Telesign — 1 operation(s) for voice.Microsoft Azure Communication Services APIAzure Communication Services provides multichannel communication APIs that enable developers to add voice, ...SignalWire Calling API (JSON-RPC)An OpenRPC 1.3.2 contract for real-time control of live calls over RELAY — 8 methods (calling.dial, calling...Amazon Polly Voices APIThe Voices API from Amazon Polly — 1 operation(s) for voices.8x8 CPaaS Voice WebhooksSubaccount-level HTTP POST callbacks emitted by the 8x8 CPaaS voice platform: VSS (Voice Session Summary) f...Zendesk Talk APIThe Zendesk Talk API is the reference API for managing Zendesk voice capabilities. It provides endpoints fo...Zendesk Talk Availabilities APIThe Zendesk Talk Availabilities API lets you manage and query agent availability for voice calls. It provid...Zendesk Talk Digital Lines APIThe Zendesk Talk Digital Lines API lets you manage the digital lines in your Zendesk voice account. Digital...Zendesk Talk Greetings APIThe Zendesk Talk Greetings API lets you manage the greetings used in your Zendesk voice account. Zendesk pr...Zendesk Talk IVRs APIThe Zendesk Talk IVRs API lets you manage Interactive Voice Response systems that use keypad tones to route...Zendesk Talk Lines APIThe Zendesk Talk Lines API lets you list the available lines, including both phone numbers and digital line...Zendesk Talk Partner Edition APIThe Zendesk Talk Partner Edition API includes a Standard Call Object with endpoints to save, read, and upda...Zendesk Talk Phone Numbers APIThe Zendesk Talk Phone Numbers API lets you manage the phone numbers in your Zendesk voice account. You can...Zendesk Talk Recordings APIThe Zendesk Talk Recordings API lets you manage call recordings stored by Talk. Recordings are exposed in t...Zendesk Talk Stats APIThe Zendesk Talk Stats API provides access to call statistics and current queue activity for your voice acc...Zendesk Talk Voice Settings APIThe Zendesk Talk Voice Settings API lets you view and manage the account settings of your Zendesk voice acc...Service Cloud Voice for Partner Telephony APIDeveloper API for connecting third-party telephony systems to Service Cloud Voice, including the Connector ...Service Cloud Voice Telephony Integration APIREST API for integrating telephony systems with Service Cloud Voice, enabling programmatic management of vo...audiopod-ai Voice APIVoice cloning and synthesisCooper Email Voice APIThe Voice API from Cooper Email — 3 operation(s) for voice.Google Cloud Text-To-Speech Voices APIThe Voices API from Google Cloud Text-To-Speech — 1 operation(s) for voices.Amazon Web Services Voices APIThe Voices API from Amazon Web Services — 1 operation(s) for voices.
Strong 38 Solid coverage with minor gaps
IBM Voices APIManage available voices.KPN Voice APICall related resource managementEDF Energy Voice APIThe Voice API from EDF Energy — 2 operation(s) for voice.Anam.ai Voices APIThe Voices API from Anam.ai — 3 operation(s) for voices.Orange Business Talk APIProgrammable management for Business Talk, Orange Business's enterprise SIP trunking and IP voice service. ...Orange Business Voice as a Service APIProgrammable voice / VoIP API for integrating outbound calls, IVR, and click-to-call into business applicat...DialNexa Voices APIThe Voices API from DialNexa — 5 operation(s) for voices.AIMLAPI Voice APIThe Voice API from AIMLAPI — 2 operation(s) for voice.Call2Me Voices APIBrowse available TTS voices from OpenAI, ElevenLabs, Cartesia and MiniMax. Filter by language, gender or pr...CM.com Voices APIThe Voices API from CM.com — 2 operation(s) for voices.ServiceNow Voice Interaction Resource APIThe ServiceNow Voice Interaction Resource API provides REST endpoints for integrating telephony and voice s...Gemini Live APILow-latency real-time voice and video interactions with Gemini using WebSockets for streaming multimodal in...Vertex AI Gemini Live APIEnterprise real-time multimodal streaming API on Vertex AI for building low-latency voice and video AI agents.Origin Energy Voice APIThe Voice API from Origin Energy — 2 operation(s) for voice.DeepL Voice APIThe DeepL Voice API provides real-time speech transcription and translation. A POST to /v3/voice/realtime i...AutoContent API Voices APIThe voices API from AutoContent API — 2 operation(s) for voices.Swisscom Voice Mail APILegacy Voice API for listing and retrieving recent voicemail messages for a Swisscom MSISDN, secured by OAu...Swisscom Voice VoIP APILegacy Voice API cluster for controlling a Swisscom VoIP subscriber — placing and listing calls, managing c...Synthflow Voices APIThe Voices API from Synthflow — 1 operation(s) for voices.Speko Voice APIThe Voice API from Speko — 8 operation(s) for voice.Kixie Event APIThe primary Kixie automation surface. A single POST endpoint on the apig.kixie.com gateway that dispatches ...Simple AI Voices APIThe Voices API from Simple AI — 2 operation(s) for voices.Amazon Alexa Skills Kit APIThe Alexa Skills Kit (ASK) REST APIs enable developers to create, manage, test, and deploy custom voice ski...KugelAudio Voices APIThe Voices API from KugelAudio — 6 operation(s) for voices.Venice.ai Voices APIThe Voices API from Venice.ai — 1 operation(s) for voices.WaterrAI API APIREST API for the WaterrAI meeting platform — create scenarios, spin up AI-driven meetings, fetch transcript...Phonic Voices APIThe voices API from Phonic — 2 operation(s) for voices.Saperly Voice APIPlace and control outbound calls and fetch call records. Audio always stays in-network — there is no live m...Saperly Voices APIDiscover the in-network text-to-speech voices a hosted connection can speak with. Each voice carries its la...Zoom Phone APIThe Zoom Phone API allows developers to access Zoom Phone functionality to build private services or public...Fixie Voices APIThe voices API from Fixie — 4 operation(s) for voices.Aveco Voice APIThe Voice API from Aveco — 12 operation(s) for voice.AgentLine Voice APIThe Voice API from AgentLine — 2 operation(s) for voice.HeyMilo Voices APIBrowse the workspace voice registry for AI interviewer voices.Jasper Voices APIThe Voices API from Jasper — 2 operation(s) for voices.StepFun Realtime APIBidirectional realtime voice over WebSocket (wss://api.stepfun.com/v1/realtime) with OpenAI Realtime-style ...volai-cz Voices APIThe Voices API from volai-cz — 1 operation(s) for voices.Beatra AI Voices APIThe voices API from Beatra AI — 3 operation(s) for voices.
Developing 46 Usable, with meaningful gaps to close
Gradium Voices APIManage custom voice clonesRoute Mobile Enterprise Voice 2.0 APIRoute Mobile's enterprise voice and cloud telephony surface, documented as narrative guides on the develope...ServiceTitan Telecom APIRetrieve inbound and outbound call records, call recordings, call analytics, and call reasons. Powers Conta...Sarj AI Developer API Voices APIThe Voices API from Sarj AI Developer API — 3 operation(s) for voices.Sendbird Calls APIThe Sendbird Calls API provides voice and video calling capabilities, enabling real-time one-on-one and gro...KaiCalls Voices APIThe Voices API from KaiCalls — 1 operation(s) for voices.Creative Fabrica Voices APISelectable voices for speech modelsBotNotice Voice APIWhat an AI call must open with, and the receipt per call. Token: the site's voice token (bni_…).dialogbrain-com Voice APIThe voice API from dialogbrain-com — 7 operation(s) for voice.Letta Voice APIVoice (low-latency) chat completions endpoint for agents.ELBO AI, INC Voices APIThe Voices API from ELBO AI, INC — 1 operation(s) for voices.neurall-io Voices APIThe Neurall voice catalog and the project's own cloned voices (v3)HeyGen APIThe HeyGen REST API exposes video generation, avatar management, text-to-speech (Starfish), video translati...HeyGen Voices APIVoice listing and voice-management endpoints.majr-app Voice APIYour account's brand-voice floor (composed beneath every draft).Deepdub Voice APIThe Voice API from Deepdub — 2 operation(s) for voice.Piknik.Spot Voice APIThe Voice API from Piknik.Spot — 2 operation(s) for voice.Bird Phone Numbers APISearch, purchase, and manage phone numbers inventory programmatically. Supports number search by country an...GogoScreen Voices APIHearing a narration voice before spending seconds on one.Moore Threads AIBook Speech Recognition APISpeech-to-text in two shapes. A realtime WebSocket at /api/v1/asr accepts 16 kHz mono audio and returns Sen...Moore Threads AIBook Streaming Voice Conversion APIA WebSocket voice-conversion service at /api/v1/streaming_vc that re-timbres a live 16 kHz 16-bit mono PCM ...Moore Threads AIBook Text-to-Speech APIHTTP and WebSocket speech synthesis. A non-streaming POST /api/v1/tts/generate returns a complete wav/mp3 f...Telia ACE Audio Stream Forwarding APIBidirectional streaming gRPC service over HTTP/2 that forwards copies of the audio streams in Telia ACE con...Delphi Voice APIStream voice responses and synthesize speech as real-time PCM audio.Discord Social SDKThe Discord Social SDK allows game developers to add rich social features into their games across desktop, ...Discord Voice APIThe Discord Voice API provides the protocol for establishing and managing voice connections between clients...Nuance Voices APIThe Voices API from Nuance — 1 operation(s) for voices.Happyrobot Voice APIThe Voice API from Happyrobot — 1 operation(s) for voice.AIStoryHub Voice APIVoiceprints: reusable 33-dial Style Lab voice profiles, and the one pinned to a story.Kaleyra Voice APIClick-to-call and outbound voice.seven.io Voice APIThe Voice API from seven.io — 1 operation(s) for voice.Tavus Voices APIThe Voices API from Tavus — 1 operation(s) for voices.Skype URIs APISkype URIs provide a mechanism for launching Skype actions from web pages and applications. Developers can ...Okareo Voice APIVoice calls, streaming, and observers.Epic Online Services (EOS)Epic Online Services is Epic's free cross-platform backend for games. EOS exposes both a native C/C++ SDK (...Epic Online Services Voice APIThe EOS Voice Interface delivers in-game voice chat using Vivox backend infrastructure, with positional aud...AT&T Cloud Voice APIsREST APIs for AT&T Business Voice and Cloud Voice services enabling partners to manage service ordering, pr...NUGU DevelopersDeveloper centre for NUGU, SK Telecom's Korean-language voice assistant platform, where third parties build...SK Telecom Voice APIThe Voice API from SK Telecom — 1 operation(s) for voice.Unisound AI Open Platform Speech WebAPIWebSocket speech APIs on the Unisound AI Open Platform: one-sentence speech recognition (Mandarin, Cantones...iX Hello Customer v2 Outbound Calling APIPlaces outbound PSTN and SIP voice calls programmatically and runs an authored iX Hello flow on the call. T...Keyframe Labs Voices APIThe Voices API from Keyframe Labs — 2 operation(s) for voices.FlowSpeech Voices APIThe Voices API from FlowSpeech — 1 operation(s) for voices.China Mobile Communication Capability Open PlatformThe 通信能力开放平台 (Communication Capability Open Platform) is China Mobile's commercial network-capability chann...D-ID Voices APIList available TTS voicesBurner APIOAuth 2.0 REST API for programmatic access to Burner line management, messaging (SMS/MMS) and configuration...
Thin 50 Limited public surface area
tenzro-xyz Voices APIThe Voices API from tenzro-xyz — 23 operation(s) for voices.Echo AI APIEcho AI API as documented publicly: 14 operations. Contract generated from the documentation by API Evangel...Plivo Application APIThe Plivo Application API manages voice applications — bundles of XML/answer/hangup/fallback URLs (and mess...Plivo Audio Stream APIThe Plivo Audio Stream API attaches a real-time WebSocket audio stream to a live call, enabling AI voice ag...Plivo Conference APIThe Plivo Conference API manages live conference rooms — listing, retrieving members, kicking, muting, deaf...Plivo Multiparty Call APIThe Plivo Multiparty Call API supports building multi-participant calls programmatically — adding/removing ...Plivo Recording APIThe Plivo Recording API exposes call and conference recordings — listing, retrieving, downloading, and dele...Plivo Verified Caller ID APIThe Plivo Verified Caller ID API allows trial accounts to verify outbound caller IDs for use as the From nu...Plivo Voice Call APIThe Plivo Voice Call API initiates outbound calls, retrieves details for live and historical calls, and sup...Plivo Zentrunk SIP Trunking APIThe Plivo Zentrunk SIP Trunking API manages termination and origination SIP trunks — outbound trunks (crede...Enginy APIEnginy API as documented publicly: 39 operations. Contract generated from the documentation by API Evangeli...EasyVoice APIEasyVoice API as documented publicly: 11 operations. Contract generated from the documentation by API Evang...Smallest AI Voices APIList prebuilt voices and manage cloned voices.Agora Voice Calling APIThe Agora Voice Calling API embeds high-quality real-time voice chat into any application. Provides crystal...JustCall REST APIREST API for placing calls, sending SMS and MMS messages, managing contacts, phone numbers, users, and call...TalkPix API Voices APIThe Voices API from TalkPix API — 1 operation(s) for voices.Phonely Agents APIManage Phonely voice agents programmatically. Retrieve a single agent or list all agents for a user, and up...Phonely Webhooks APIReceive structured post-call event data from Phonely after each AI voice interaction completes. The Send Ca...Cartesia Voices APIVoice catalog management and voice cloning.Neuphonic Voices APIThe Voices API from Neuphonic — 2 operation(s) for voices.Deutsche Telekom Voice APIDeliver high-quality voice experiences over the low-latency, feature-rich, global Deutsche Telekom network ...WellSaid Labs Voices APIDiscover available voice avatars.Together AI Voices APIThe Voices API from Together AI — 1 operation(s) for voices.MiniMax Voice APIThe Voice API from MiniMax — 4 operation(s) for voice.Colossyan Voices APIList available AI voices.CallSimple MCP ServerRemote Model Context Protocol server that users add as a custom connector in Claude or a custom MCP app in ...Vapi Webhooks APIServer- and client-side webhook events emitted by Vapi during voice sessions, including end-of-call reports...Global Relay Voice APIEndpoints for archiving voice and video recordingsNarakeet Voices APIList the voices available for audio and video production.Bland AI Platform APIREST API for sending and managing AI phone calls, pathways (conversation flows), voices and voice clones, p...Messaging APIsA portfolio of messaging APIs including SMS Middle East and Africa, Messaging Pro Cameroon, Voice as a Serv...Dialpad Calls APIThe Calls API from Dialpad — 7 operation(s) for calls.Inworld AI Voices APIVoice catalog and custom voice managementInworld Realtime APILow-latency speech-to-speech voice API for natural conversation experiences. Included with all plans.Aircall Calls APIThe Calls API from Aircall — 7 operation(s) for calls./call-me MCP ServerRemote MCP server (Streamable HTTP, protocol 2025-06-18, serverInfo name call-me) that lets an AI agent rin...HTS Assist (Agentic AI Customer Service)Agentic AI built specifically for airline and travel customer service, delivering end-to-end autonomous res...Rephrase.ai Voice APIThe Voice API from Rephrase.ai — 1 operation(s) for voice.Uberduck Voices APIList, filter, and clone voices.Falcon Builder APIFalcon Builder API as documented publicly: 4 operations. Contract generated from the documentation by API E...ClickSend Voice APISend and view voice (text-to-speech) messages.Exotel Voice APIPlace and control outbound voice calls.Vocalware Text-to-Speech APIVocalware is Oddcast's cloud text-to-speech service. It exposes a pay-as-you-go HTTP/REST API (suitable for...Argil Voices APIClone, list, and sync voices.Casimo Voices APIThe Voices API from Casimo — 1 operation(s) for voices.MirrorFly Chat Platform APIToken-authenticated REST API for building in-app chat, split into User APIs and Admin APIs (users, contacts...Podcastle Voices APIBrowse the voice library and create instant voice clones.Layercode Realtime Voice APIBidirectional realtime WebSocket transport that streams base64 PCM microphone audio from the browser to Lay...Creatify Voices APICatalog of AI voices and accents.Speechify Voices APIThe Voices API from Speechify — 2 operation(s) for voices.
Emerging 17 Early or largely undocumented
Aider Voice APIAider Voice-to-Code Input.Vocode Voices APIThe Voices API from Vocode — 4 operation(s) for voices.Photon Voice APICross-platform low-latency voice chat built directly on top of Photon Realtime - it inherits Realtime's mat...what3words AutoSuggest EndpointValidates and autocorrects partial or imperfect three-word input, returning ranked suggestions. Supports fo...High Fidelity Spatial Audio APIClient SDK and hosted spatial audio server for embedding real-time positional voice in web and native apps....Respeecher Voices APIThe voices API from Respeecher — 4 operation(s) for voices.Africa's Talking Voice APIOutbound calls, transfers, queue status, and media upload.Singtel CPaaS Voice APIProgrammable voice / VoIP calling embedded into business applications, sold as part of the Singtel CPaaS po...callagent.pro Agent APIREST API for everything the callagent.pro dashboard does: agents, test-chat and test-call, numbers, SIP acc...Sierra Agent OSSierra Agent OS is the enterprise platform for building, deploying, and operating customer-facing AI agents...NTT DOCOMO BUSINESS Developer PortalUnified API gateway for NTT Communications / NTT DOCOMO BUSINESS enterprise services. Catalogs APIs across ...Cox Business Services APIREST API for Cox Business customers to manage voice, internet, and cloud connectivity services, including c...ReadSpeaker Speech Cloud APIA cloud-based text-to-speech API. When using the API from within your software or application, you simply s...Replica APIReplica API v2 (OpenAPI 3.0.0) — REST API for AI text-to-speech, speech-to-speech, and voice-library operat...Inmarsat GSPS APIThe GSPS (Global Satellite Phone Service) API supports Inmarsat's L-band geostationary satellite voice netw...Intermedia Voice APIThe Intermedia Voice API enables developers to embed voice calling capabilities into CRMs, ERPs, ticketing ...Rakuten CPaaS Confirm (OTP) APIOne-time PIN delivery and verification API for two-factor authentication and transaction confirmation, with...
Minimal 6 Almost no public developer surface
BT Wholesale HubCo WHCE APIWholesale Hosted Centrex / Voice (WHCE) API for managing hosted voice services delivered via BT Wholesale's...Global Voice Services APIInitiate ordering of phone numbers and configuration for BT Global Voice Services consumed by multinational...Parloa Agent Management Platform (AMP)The Parloa Agent Management Platform (AMP) is the primary product surface for designing, testing, scaling, ...Open Voice Network APIAPI for the Open Voice Network, providing programmatic access to open standards and interoperability framew...PlayAI Text-to-Speech APIThe PlayAI Text-to-Speech API converts text into natural, human-like speech using the PlayDialog 1.0, Dialo...PlayHT Voices APIPrebuilt voice catalog.
Companies reaching this through an API (77)
These companies publish an API, specification or operation carrying “Voice” 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.
Aider
AIMLAPI
AIStoryHub
Amazon Web Services
Anam.ai
Argil
AT&T
audiopod-ai
AutoContent API
Aveco
Beatra AI
BotNotice
Casimo
China Mobile
Colossyan
Cooper Email
Corebee
Cox Communications
Creatify
Creative Fabrica
D-ID
DeepL
Deutsche Telekom
DialNexa
Echo AI
EDF Energy
Enginy
Falcon Builder
Fixie
Global Relay
GogoScreen
Google Cloud Text-To-Speech
Google Gemini
Gradium
Happyrobot
HeyGen
HeyMilo
Hopper
IBM
Inmarsat
Jasper
KaiCalls
Letta
majr-app
Microsoft Azure
Neuphonic
NTT
Okareo
OpenAI
Orange
Show all 77 companies ↓
Origin Energy
Phonely
Phonic
Photon Engine
Piknik.Spot
Podcastle
Rakuten Mobile
Rephrase.ai
Respeecher
Salesforce
Salesforce Service Cloud APIs
Sarj AI Developer API
ServiceNow
ServiceTitan
SK Telecom
StepFun
TalkPix API
Tavus
Telia Company
tenzro-xyz
Together AI
Venice.ai
Vocode
waterr-ai
what3words
Zendesk
Zoom
Score breakdown
Frequency
69.8
log-scaled weighted occurrences
Breadth
3.5
spread across providers
Quality lift
35.9
mean composite of providers using it
Cohesion
17.3
strength of nearest seed neighbor
Where this tag sits
272 providers carry this tag directly, and 494 counting the 6 narrower tags below — 222 more to reach.
Voice AI
136 providers
Voice Agents
42 providers
Speech-to-Text
53 providers
Text-to-Speech
84 providers
Speech Recognition
54 providers
Speech Synthesis
13 providers
Related tags
SMS 78 co-occurrences
Text-to-Speech 57 co-occurrences
Telephony 51 co-occurrences
Conversational AI 65 co-occurrences
Calls 46 co-occurrences
Communications 65 co-occurrences
Contact Center 47 co-occurrences
Messaging 79 co-occurrences
Where this tag comes from
Provider tag272
Api tag181
Openapi tag85
Openapi op tag272
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.
| Market | Share of the market's providers |
|---|---|
| Telecom Network APIs (CAMARA) | 60% |
| Communications (CPaaS) | 48% |
| Speech and Voice AI | 39% |
| Customer Support, Helpdesk and Contact Center | 22% |
Cohort brief
Auto-generatedThe 246 providers in the APIs.io catalog tagged Voice, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.
Providers
246
of 272 in the catalog
Mean Kin Score
37.3
+13.2 vs catalog 24.1
Mean Agent Readiness
23.6
+9.5 vs catalog 14.1
Spread
0–93.5
median 36.1 · σ 20.5
How the 246 split by band
Exemplar 18Strong 41Developing 51Thin 57Emerging 55Minimal 24
Facet averages, against the whole catalog
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Contract Quality | 34.6 | 18.6 | +16 | 246 |
| Developer Ergonomics | 39.9 | 24.5 | +15.4 | 246 |
| Access Clarity | 44 | 30 | +14 | 246 |
| Operational Transparency | 24.5 | 13.2 | +11.3 | 246 |
| Discoverability | 66.5 | 59.1 | +7.4 | 246 |
| Contract Governance | 15 | 9.7 | +5.3 | 246 |
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
| Artifact | This cohort | Catalog | Difference |
|---|---|---|---|
| MCP server (any) | 27% | 18% | +9 |
| MCP server (first-party) | 28% | 16% | +12 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 15% | 13% | +2 |
| Security | 99% | 99% | 0 |
| Arazzo workflows | 2% | 1% | +1 |
| Governance rules | 59% | 36% | +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 Telnyx 93.5
- 2 Twilio 90.8
- 3 Infobip 86.9
- 4 ElevenLabs 83.2
- 5 Amigo 82
- 6 Amazon Lex 80
- 7 Amazon Connect 79
- 8 Telesign 77
- 9 SignalWire 74.2
- 10 Microsoft Azure Communication Services 73.7
Top by Agent Readiness
- 1 Telnyx 79.5
- 2 dialogbrain-com 65.6
- 3 Bird 65.2
- 4 yappy-biz 63.5
- 5 Voxplo 63.3
- 6 Infobip 61.3
- 7 Sinch 61.2
- 8 Speko 61
- 9 AgentPhone 60.5
- 10 ElevenLabs 60.3
All 272 members of this roster resolve to a provider in the
catalog; 246 carry a score (90%).
The figures above describe the scored members only.
Coverage caveat. 174 of 246 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.
Coverage caveat. 174 of 246 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.