established · 0.0 market domain

Voice

Score 29.5 / 100 204 providers +36 via APIs 114 APIs Search apis.io →
Variants seen in the corpus: Voicevoice

Providers using this tag (204)

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

Exemplar 8 Complete, well-documented, and agent-ready
Amazon PinpointCampaignsCommunicationsEmailMarketing2 APIs82.2InfobipTelecommunicationsCroatiaCPaaSMessaging47 APIs75.4TwilioAuthenticationCommunicationsContact CenterEmail40 APIs72.9Zoom PhoneTelecommunicationsUnited StatesUCaaSCloud PBX2 APIs72.48x8TelecommunicationsUnited StatesCPaaSUCaaS34 APIs70.3Orange Business5GArtificial IntelligenceB2BCAMARA12 APIs70.1SignalWireCompanyCommunicationsCPaaS4 APIs68.9AmigoCompanyArtificial IntelligenceHealthcareAI Agents2 APIs67.2
Strong 22 Solid coverage with minor gaps
Inworld AIArtificial IntelligenceText-to-SpeechSpeech-to-Text6 APIs65.1Spruce HealthHealthcareHIPAACommunicationsSecure Messaging16 APIs64.9SwisscomTelecommunicationsSwitzerlandMobile Network OperatorBroadband2 APIs64.9GladlyCustomer ServiceCXContact CenterAI Customer Service1 API62.7KPNTelecommunicationsNetherlandsMobile Network OperatorBroadband34 APIs62.4SyllableCompanyArtificial IntelligenceAI Agents1 API61.9KixieCompanySales EngagementTelephony3 APIs60.7Amazon PollyArtificial IntelligenceMachine-LearningSpeech SynthesisText-to-Speech2 APIs60.1CloudTalkCompanyCommunicationsVoIP1 API58.9SynthflowVoice AgentsNo-CodeTelephony1 API58.9Neutrino APIData ValidationData ToolsTelephonyCommunications2 APIs57.6The Mobile First CompanyCompanyCommunicationsTelephony1 API57.3SinchCommunicationsMessagingSMS10 APIs57.2UnifonicCompanyEnterpriseCPaaSMessaging3 APIs56.6RingCentralCommunicationsUCaaSVideo1 API56.3ZavuCompanyMessagingSMSWhatsApp1 API56.1Reliance JioTelecommunicationsIndiaMobile Network OperatorNetwork APIs6 APIs56.0Amazon ConnectChatContact CenterCustomer Service22 APIs54.8OpenPhoneCompanyCommunicationsSMS2 APIs54.8Bright PatternCompanyContact CenterCCaaSCustomer Experience11 APIs54.7Kore.aiCompanyArtificial IntelligenceConversational AIAgents3 APIs54.7Route MobileTelecommunicationsIndiaCPaaSMessaging5 APIs54.7
Developing 43 Usable, with meaningful gaps to close
BandwidthCommunicationsCPaaSMessaging3 APIs53.7KaleyraCPaaSMessagingSMSWhatsApp1 API53.7SLNGCompanySpeechSpeech-to-Text7 APIs53.7HatchCompanyVertical SoftwareCustomer CommunicationConversational AI1 API53.3rtcStatsWebRTCObservabilityMonitoringDebugging2 APIs53.1AmazonAmazonAdvertisingAlexaE-Commerce3 APIs52.3OutRivalCompanyEnterprise SaasConversational AIAI Agents2 APIs51.7AnamCompanyArtificial IntelligenceAvatarsConversational AI1 API51.6VonageCommunicationsMessagingTelecommunicationsVideo Conferencing1 API51.0QuoCompanyCommunicationsMessagingSMS1 API50.7Bharti AirtelTelecommunicationsIndiaMobile Network OperatorNetwork APIs8 APIs50.3SpekoVoice AISpeech-to-TextText-to-Speech1 API50.3NextivaCompanyCommunicationsContact Center5 APIs49.8Sonde HealthCompanyHealthHealthcareDigital Health1 API49.5Wispr AICompanySpeech-to-TextDictation1 API49.4DeepdubCompanyText-to-SpeechDubbing2 APIs49.3ELBO AI, INCCompanyArtificial IntelligenceVideoText-to-Speech1 API49.3NetomiCompanyArtificial IntelligenceAgentic AICustomer Experience1 API49.3Heidi HealthHealthcareHealth TechAI Medical ScribeAmbient AI1 API48.2KugelAudioText-to-SpeechSpeech SynthesisVoice AI1 API48.1Tata CommunicationsTelecommunicationsIndiaWholesale CarrierCPaaS3 APIs47.8SarvamCompanyAi MlArtificial IntelligenceMachine-Learning1 API47.4ActionpowerSpeech RecognitionSpeech-to-TextText-to-SpeechNatural Language Processing2 APIs47.3UnisoundCompanyArtificial IntelligenceSpeech RecognitionText-to-Speech3 APIs47.0Epic GamesAchievementsAnti-CheatCross-PlatformEOS1 API46.8Moore ThreadsCompanyGPUArtificial IntelligenceMachine-Learning4 APIs46.7DiscordChatCommunicationsGamingMessaging3 APIs46.0Arpeggi LabsCompanyMusicAudioArtificial Intelligence1 API45.3PlayHTTTSText-to-SpeechVoice Cloning1 API44.1AgentPhoneCompanyTelephonyPhone NumbersSMS1 API43.8Smallest AIArtificial IntelligenceText-to-SpeechReal-Time1 API43.1ShapesCompanyArtificial IntelligenceAI AgentsChat1 API42.9KotobaCompanyArtificial IntelligenceMachine-Learning4 APIs42.8BirdCommunicationsSMSEmailWhatsApp6 APIs42.5NablaHealthcareAmbient AIClinical DocumentationMedical Transcription1 API42.2RokidSmart GlassesAugmented RealityWearablesArtificial Intelligence2 APIs42.2Google VoiceGoogle VoiceMessagingPhoneTelecommunications1 API41.9PlivoCommunicationsCPaaSSMS1 API41.9Cisco Voice PortalContact CenterIVRTelephony4 APIs41.6GliaCompanyCustomer ServiceContact CenterBanking3 APIs41.0Algebras AI Inc.CompanyTranslationLocalizationInternationalization1 API40.5WhippyCommunicationsMessagingSMSEmail1 API40.5ListnrArtificial IntelligenceText-to-SpeechTTS1 API39.9
Thin 57 Limited public surface area
BurnerCompanyPhone NumbersSMSMMS1 API39.2PipecatArtificial IntelligenceMulti-ModalAgents1 API39.2RainbowCommunicationsCPaaSChat3 APIs39.2SMSAPIMessagingSMSMMS1 API39.0NarakeetText-to-SpeechTTSAudio1 API38.6CometChatChatMessagingVideo1 API38.4UberduckArtificial IntelligenceText-to-SpeechTTS1 API38.4Fish AudioText-to-SpeechSpeech-to-TextVoice Cloning1 API38.3DyteVideoReal-TimeWebRTC1 API38.2ConcentrixAI AgentsBusiness Process OutsourcingConsultingConversational AI2 APIs38.0ClickSendCommunicationsSMSMMS1 API37.9DelphiCompanyArtificial IntelligenceAI ClonesDigital Minds1 API37.9QuarterzipCompanyAI AgentsCustomer-SupportOnboarding37.7SpeechifyArtificial IntelligenceText-to-SpeechSpeech Synthesis1 API37.7VoiceittSpeech RecognitionSpeech-to-TextAccessibility1 API37.6LayercodeArtificial IntelligenceVoice AgentsReal-Time1 API37.4VapiArtificial IntelligenceAgentsReal-Time1 API37.111xCompanyArtificial IntelligenceAI AgentsSales1 API36.7Unreal SpeechText-to-SpeechTTSSpeech SynthesisAudio1 API36.7Retell AIArtificial IntelligenceAgentsReal-Time1 API36.3Keyframe LabsCompanyArtificial IntelligenceAvatarsVideo1 API36.1WellSaid LabsArtificial IntelligenceText-to-SpeechAudio1 API36.1JustCallSMSCloud PhoneContact Center1 API35.8SobotCompanyEnterpriseContact CenterCustomer Service4 APIs35.8AlianzaCompanyCommunicationsCloud Communications2 APIs35.6TelnyxCommunicationsCPaaSSMS1 API35.6Kalpa LabsCompanySpeechText-to-Speech1 API35.3VoiceflowArtificial IntelligenceConversationalChat1 API35.2Resemble AIArtificial IntelligenceTTSVoice Cloning1 API34.7TelefonieCall RecordingCPaaSMessagingNumber Provisioning4 APIs34.7Hume AIArtificial IntelligenceEmpathicEmotion4 APIs34.6TelefonCall RecordingCommunicationsCPaaSGlobal Coverage4 APIs34.5TelefoonBelgiumCPaaSEU Data ResidencyEurope3 APIs34.3engageSPARKCompanyMessagingSMS1 API34.1Bland AIArtificial IntelligenceAgentsPhone1 API34.046elksCPaaSSMSMMS1 API33.8MiniMaxArtificial IntelligenceLLMInferenceMulti-Modal1 API33.8JitsiVideo ConferencingWebRTCReal-Time CommunicationOpen-Source10 APIs33.5Inworld AIArtificial IntelligenceCharactersGames1 API32.8MoviusCompanyCommunicationsMessagingMobile1 API32.7MurfArtificial IntelligenceTTSVoiceover1 API32.6LiveKitReal-TimeWebRTCAudioVideo6 APIs32.2LemonflowCompanyArtificial IntelligenceAI AgentsCustomer-Support1 API31.8AircallCommunicationsCloud PhoneCRM1 API31.2RingCaptcha (ThriveCom)CompanyTwo-Factor AuthenticationPhone VerificationOne-Time Passcode1 API31.1TenfoldCompanyCTIContact CenterTelephony1 API30.8AgoraReal-Time EngagementVideoSignaling11 APIs30.6DialpadCommunicationsArtificial IntelligenceContact Center1 API30.6Africa's TalkingCommunicationsSMSUSSD1 API30.4SonosCompanyConsumerAudioMusic1 API30.0PoshArtificial IntelligenceConversational AIAgentic AIBanking1 API29.2OddcastCompanyText-to-SpeechSpeech SynthesisAvatars2 APIs28.9RimeArtificial IntelligenceTTSReal-Time1 API28.7ClickSend SMSSMSMMSMessaging1 API27.9TalkdeskContact CenterCCaaSWebhook1 API27.3ExotelCloud TelephonySMSIndia1 API27.1Custom Chat API | MirrorFlyChat APIMessagingCPaaSVoIP1 API26.2
Emerging 40 Early or largely undocumented
Maxim AIArtificial IntelligenceLLMAgentsObservability1 API25.8NuanceCompanySpeech RecognitionConversational AINatural Language Understanding5 APIs25.7AgentSeaCompanyArtificial IntelligenceAI AgentsAgent Orchestration2 APIs25.2Microsoft SkypeCommunicationsMessagingMicrosoftVideo2 APIs24.8SynervozCompanyAudioSDK23.8Tin CanCompanyConsumerHardwareTelecommunications23.7SierraAgentsArtificial IntelligenceChatConversational AI1 API23.6Wit.AICompanyNatural Language ProcessingNLPSpeech Recognition1 API23.6High FidelityCompanyConsumerSpatial AudioAudio1 API23.4VoquillCompanyDictationSpeech-to-Text22.9SpeechlyCompanySpeech RecognitionSpoken Language Understanding1 API22.7DecagonAgentsArtificial IntelligenceChatConversational AI1 API21.7Wispr FlowCompanyDictationSpeech-to-Text21.2VoxerCompanyCommunicationsPush To TalkWalkie-Talkie20.9RinglyCompanyArtificial IntelligenceCustomer-Support20.1UJETCompanyEnterpriseContact CenterCCaaS20.1SingtelTelecommunicationsSingaporeMobile Network OperatorNetwork APIs7 APIs19.8ParloaAgentsArtificial IntelligenceCall CenterCCaaS2 APIs19.2Scaled CognitionArtificial IntelligenceAgentsLarge Language ModelsCustomer Experience1 API19.0Useful SensorsCompanyAi MlSpeech-to-TextText-to-Speech18.1ReadSpeakerText-to-SpeechSpeechAudio1 API17.8Pindrop SecurityCompanySecurityAuthentication16.8Uare.aiCompanyArtificial IntelligencePersonal AIDigital Twin16.7IntermediaCloudCommunicationsContact CenterVideo Conferencing5 APIs16.2BesideCompanySoftwareCommunications16.1YampaCompanyAi MlAI AgentsCustomer Service15.7AgentifAICompanyArtificial IntelligenceConversational AI15.3Actium HealthCompanyHealthcarePatient EngagementConversational AI15.1Replica StudiosCompanyText-to-SpeechSpeech to Speech1 API14.7Robylon AICustomer-SupportAI AgentsConversational AI1 API14.3OpenEvidenceHealthcareClinical Decision SupportMedical AIGenerative AI14.2NurixCompanyArtificial IntelligenceConversational AIAgentic AI14.1SalientCompanyArtificial IntelligenceLendingLoan Servicing13.4InsurifyInsuranceMarketplaceComparisonAI Agents1 API13.1OutverseCompanyArtificial IntelligenceAI AgentsCustomer-Support12.8LatoCompanyArtificial IntelligenceAgentsMarket Research12.3FlossyCompanyArtificial IntelligenceAI AgentsHealthcare11.8Open Voice NetworkArtificial IntelligenceLinux FoundationStandards1 API11.8StoryboardCompanyFleet OperationsArtificial Intelligence11.5LightberryCompanyRoboticsArtificial IntelligenceConversational AI11.0
Minimal 28 Almost no public developer surface
David AICompanyArtificial IntelligenceMachine-LearningAudio Data10.6VolleyCompanyGamesEntertainment10.6iBasisCompanyTelecom InfrastructureMessaging10.4ClubhouseCompanySocial AudioSocial NetworkingLive Audio10.2Altira HealthCompanyHealthcareHealth TechnologyClinical10.0getriffCompanyVideo ConferencingTeam CollaborationRemote Work9.7ZymblyCompanyArtificial IntelligenceAviationAircraft Maintenance9.6PingerCompanyCommunicationsTelecommunicationsMessaging9.4DialupCompanySocialCommunications9.2BT GroupTelecommunicationsTelcoMobile NetworkBroadband15 APIs8.5Chimelabs Holdings PTY LTDCompanyArtificial IntelligenceReceptionist8.5VoxeetCompanyConferencingVideo7.5ToyTalkCompanyConversational AIChatbots7.2SandbarCompanyConsumer HardwareWearables7.1Atmee.aiCompanyArtificial IntelligenceAvatarsConversational AI6.4Daero GroupCompanyConstructionConstruction TechnologyField Operations6.0HyroCompanyArtificial IntelligenceConversational AIAI Agents5.4SnipsCompanyArtificial IntelligenceNatural Language Understanding5.3Brooktrout TechnologyCompanyFaxTelephony5.0ClementineCompanyAcquiredDefunctEnterprise Communication5.0Conexant SystemsCompanySemiconductorsHardwareAudio5.0Cord *CompanyConsumerMessaging5.0DrivetimeCompanyGamingEntertainment5.0HUM IndustriesCompanyWearablesArtificial IntelligenceConsumer Hardware5.0SonanticText-to-SpeechEmotive AIAcquired5.0VoiceraCompanyArtificial IntelligenceTranscription5.0RcomCompanyTelecommunicationsEnterpriseNetworking3.2Talk LabsCompanyArtificial IntelligenceCorporate Training2.2
Unrated 6 Not yet scored
Allegiance TelecomCompanyTelecommunicationsCLECFocal CommunicationsCompanyTelecommunicationsCLECLocal Exchange CarrierinbilinCompanySocialMobileOrativeCompanyEnterprise SoftwareConferencingCollaborationTalkoCompanyCommunicationsMessagingTalkrayCompanyMessagingCommunications

APIs with this tag (114)

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 9 Complete, well-documented, and agent-ready
Salesforce Service Cloud Voice APIThe Salesforce Service Cloud Voice API provides Telephony Integration REST API and Voice Toolkit API for pr...87.5OpenAI Agents SDKThe OpenAI Agents SDK is a lightweight framework for building multi-agent workflows in Python and TypeScrip...82.9OpenAI Realtime APIThe Realtime API from OpenAI — 9 operation(s) for realtime.82.9Microsoft Azure Communication Services APIAzure Communication Services provides multichannel communication APIs that enable developers to add voice, ...73.3Twilio Voice APIThe Voice API from Twilio — 10 operation(s) for voice.72.98x8 CPaaS Voice WebhooksSubaccount-level HTTP POST callbacks emitted by the 8x8 CPaaS voice platform: VSS (Voice Session Summary) f...70.3Orange Business Business Talk APIProgrammable management for Business Talk, Orange Business's enterprise SIP trunking and IP voice service. ...70.1Orange Business Voice as a Service APIProgrammable voice / VoIP API for integrating outbound calls, IVR, and click-to-call into business applicat...70.1SignalWire Calling API (JSON-RPC)An OpenRPC 1.3.2 contract for real-time control of live calls over RELAY — 8 methods (calling.dial, calling...68.9
Strong 21 Solid coverage with minor gaps
AIMLAPI Voice APIThe Voice API from AIMLAPI — 2 operation(s) for voice.65.5Swisscom Voice Mail APILegacy Voice API for listing and retrieving recent voicemail messages for a Swisscom MSISDN, secured by OAu...64.9Swisscom Voice VoIP APILegacy Voice API cluster for controlling a Swisscom VoIP subscriber — placing and listing calls, managing c...64.9Dolby.io Communications APILegacy Communications APIs for high-quality WebRTC voice and video conferencing with spatial audio, music m...63.1KPN Voice APICall related resource management62.4Zendesk Talk APIThe Zendesk Talk API is the reference API for managing Zendesk voice capabilities. It provides endpoints fo...61.1Zendesk Talk Availabilities APIThe Zendesk Talk Availabilities API lets you manage and query agent availability for voice calls. It provid...61.1Zendesk Talk Digital Lines APIThe Zendesk Talk Digital Lines API lets you manage the digital lines in your Zendesk voice account. Digital...61.1Zendesk Talk Greetings APIThe Zendesk Talk Greetings API lets you manage the greetings used in your Zendesk voice account. Zendesk pr...61.1Zendesk Talk IVRs APIThe Zendesk Talk IVRs API lets you manage Interactive Voice Response systems that use keypad tones to route...61.1Zendesk Talk Lines APIThe Zendesk Talk Lines API lets you list the available lines, including both phone numbers and digital line...61.1Zendesk Talk Partner Edition APIThe Zendesk Talk Partner Edition API includes a Standard Call Object with endpoints to save, read, and upda...61.1Zendesk Talk Phone Numbers APIThe Zendesk Talk Phone Numbers API lets you manage the phone numbers in your Zendesk voice account. You can...61.1Zendesk Talk Recordings APIThe Zendesk Talk Recordings API lets you manage call recordings stored by Talk. Recordings are exposed in t...61.1Zendesk Talk Stats APIThe Zendesk Talk Stats API provides access to call statistics and current queue activity for your voice acc...61.1Zendesk Talk Voice Settings APIThe Zendesk Talk Voice Settings API lets you view and manage the account settings of your Zendesk voice acc...61.1Kixie Event APIThe primary Kixie automation surface. A single POST endpoint on the apig.kixie.com gateway that dispatches ...60.7ServiceNow Voice Interaction Resource APIThe ServiceNow Voice Interaction Resource API provides REST endpoints for integrating telephony and voice s...60.7AT&T Cloud Voice APIsREST APIs for AT&T Business Voice and Cloud Voice services enabling partners to manage service ordering, pr...56.4Amazon Voice ID APIAmazon Connect Voice ID provides real-time caller authentication and fraud risk detection to make voice int...54.8Route Mobile Enterprise Voice 2.0 APIRoute Mobile's enterprise voice and cloud telephony surface, documented as narrative guides on the develope...54.7
Developing 42 Usable, with meaningful gaps to close
Kaleyra Voice APIClick-to-call and outbound voice.53.7Zoom Phone APIThe Zoom Phone API allows developers to access Zoom Phone functionality to build private services or public...53.3Amazon Alexa Skills Kit APIThe Alexa Skills Kit (ASK) REST APIs enable developers to create, manage, test, and deploy custom voice ski...52.3Gemini Live APILow-latency real-time voice and video interactions with Gemini using WebSockets for streaming multimodal in...52.2Vertex AI Gemini Live APIEnterprise real-time multimodal streaming API on Vertex AI for building low-latency voice and video AI agents.52.2ServiceTitan Telecom APIRetrieve inbound and outbound call records, call recordings, call analytics, and call reasons. Powers Conta...52.1Telia ACE Audio Stream Forwarding APIBidirectional streaming gRPC service over HTTP/2 that forwards copies of the audio streams in Telia ACE con...51.9Vonage Voice APICreate and control voice calls51.0Letta Voice APIVoice (low-latency) chat completions endpoint for agents.50.3Speko Voice APIThe Voice API from Speko — 8 operation(s) for voice.50.3Service Cloud Voice for Partner Telephony APIDeveloper API for connecting third-party telephony systems to Service Cloud Voice, including the Connector ...49.4Service Cloud Voice Telephony Integration APIREST API for integrating telephony systems with Service Cloud Voice, enabling programmatic management of vo...49.4Deepdub Voice APIThe Voice API from Deepdub — 2 operation(s) for voice.49.3DeepL Voice APIThe DeepL Voice API provides real-time speech transcription and translation. A POST to /v3/voice/realtime i...49.1Phonely Agents APIManage Phonely voice agents programmatically. Retrieve a single agent or list all agents for a user, and up...48.4Phonely Webhooks APIReceive structured post-call event data from Phonely after each AI voice interaction completes. The Send Ca...48.4Gemini Live APILow-latency bidirectional streaming API enabling real-time voice and video interactions with Gemini models ...48.0StepFun Realtime APIBidirectional realtime voice over WebSocket (wss://api.stepfun.com/v1/realtime) with OpenAI Realtime-style ...47.6Unisound AI Open Platform Speech WebAPIWebSocket speech APIs on the Unisound AI Open Platform: one-sentence speech recognition (Mandarin, Cantones...47.0Epic Online Services (EOS)Epic Online Services is Epic's free cross-platform backend for games. EOS exposes both a native C/C++ SDK (...46.8Epic Online Services Voice APIThe EOS Voice Interface delivers in-game voice chat using Vivox backend infrastructure, with positional aud...46.8Moore 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...46.7Moore 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 ...46.7Moore Threads AIBook Text-to-Speech APIHTTP and WebSocket speech synthesis. A non-streaming POST /api/v1/tts/generate returns a complete wav/mp3 f...46.7Sendbird Calls APIThe Sendbird Calls API provides voice and video calling capabilities, enabling real-time one-on-one and gro...46.2Discord Social SDKThe Discord Social SDK allows game developers to add rich social features into their games across desktop, ...46.0Discord Voice APIThe Voice API from Discord — 1 operation(s) for voice.46.0Unity Vivox Voice and Text Chat APIVivox in-game voice and text chat with moderation, channel management, and recordings. The Moderation REST ...45.0NUGU DevelopersDeveloper centre for NUGU, SK Telecom's Korean-language voice assistant platform, where third parties build...43.8SK Telecom Voice APIThe Voice API from SK Telecom — 1 operation(s) for voice.43.8Telesign Voice APISend voice messages including OTPs, alerts, and notifications to phone numbers worldwide. Supports text-to-...43.1Bird Phone Numbers APISearch, purchase, and manage phone numbers inventory programmatically. Supports number search by country an...42.5Happyrobot Voice APIThe Voice API from Happyrobot — 1 operation(s) for voice.42.3Plivo Application APIThe Plivo Application API manages voice applications — bundles of XML/answer/hangup/fallback URLs (and mess...41.9Plivo Audio Stream APIThe Plivo Audio Stream API attaches a real-time WebSocket audio stream to a live call, enabling AI voice ag...41.9Plivo Conference APIThe Plivo Conference API manages live conference rooms — listing, retrieving members, kicking, muting, deaf...41.9Plivo Multiparty Call APIThe Plivo Multiparty Call API supports building multi-participant calls programmatically — adding/removing ...41.9Plivo Recording APIThe Plivo Recording API exposes call and conference recordings — listing, retrieving, downloading, and dele...41.9Plivo Verified Caller ID APIThe Plivo Verified Caller ID API allows trial accounts to verify outbound caller IDs for use as the From nu...41.9Plivo Voice Call APIThe Plivo Voice Call API initiates outbound calls, retrieves details for live and historical calls, and sup...41.9Plivo Zentrunk SIP Trunking APIThe Plivo Zentrunk SIP Trunking API manages termination and origination SIP trunks — outbound trunks (crede...41.9China 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...41.2
Thin 24 Limited public surface area
Burner APIOAuth 2.0 REST API for programmatic access to Burner line management, messaging (SMS/MMS) and configuration...39.2iX Hello Customer v2 Outbound Calling APIPlaces outbound PSTN and SIP voice calls programmatically and runs an authored iX Hello flow on the call. T...38.0ClickSend Voice APISend and view voice (text-to-speech) messages.37.9Delphi Voice APIStream voice responses and synthesize speech as real-time PCM audio.37.9Layercode Realtime Voice APIBidirectional realtime WebSocket transport that streams base64 PCM microphone audio from the browser to Lay...37.4Vapi Webhooks APIServer- and client-side webhook events emitted by Vapi during voice sessions, including end-of-call reports...37.1JustCall REST APIREST API for placing calls, sending SMS and MMS messages, managing contacts, phone numbers, users, and call...35.8Global Relay Voice APIEndpoints for archiving voice and video recordings35.7Photon Voice APICross-platform low-latency voice chat built directly on top of Photon Realtime - it inherits Realtime's mat...35.2Bland AI Platform APIREST API for sending and managing AI phone calls, pathways (conversation flows), voices and voice clones, p...34.0MiniMax Voice APIThe Voice API from MiniMax — 4 operation(s) for voice.33.8Inworld Realtime APILow-latency speech-to-speech voice API for natural conversation experiences. Included with all plans.32.8what3words AutoSuggest EndpointValidates and autocorrects partial or imperfect three-word input, returning ranked suggestions. Supports fo...32.4HTS Assist (Agentic AI Customer Service)Agentic AI built specifically for airline and travel customer service, delivering end-to-end autonomous res...31.7Aircall Calls APIThe Calls API from Aircall — 7 operation(s) for calls.31.2Messaging APIsA portfolio of messaging APIs including SMS Middle East and Africa, Messaging Pro Cameroon, Voice as a Serv...30.8Agora Voice Calling APIThe Agora Voice Calling API embeds high-quality real-time voice chat into any application. Provides crystal...30.6Dialpad Calls APIThe Calls API from Dialpad — 7 operation(s) for calls.30.6Africa's Talking Voice APIOutbound calls, transfers, queue status, and media upload.30.4Vocalware Text-to-Speech APIVocalware is Oddcast's cloud text-to-speech service. It exposes a pay-as-you-go HTTP/REST API (suitable for...28.9Deutsche Telekom Voice APIDeliver high-quality voice experiences over the low-latency, feature-rich, global Deutsche Telekom network ...28.6Aider Voice APIAider Voice-to-Code Input.27.3Exotel Voice APIPlace and control outbound voice calls.27.1MirrorFly Chat Platform APIToken-authenticated REST API for building in-app chat, split into User APIs and Admin APIs (users, contacts...26.2
Emerging 15 Early or largely undocumented
Agora.ioA realtime engagement platform offering Video Calling, Voice Calling, Signaling, Chat, and a Conversational...25.0LiveKitAn open-source WebRTC platform marketed as "The platform for voice, video, and physical AI agents." LiveKit...25.0Azure Communication ServicesAzure Communication Services (successor to Skype developer APIs) provides cloud-based communication APIs fo...24.8Skype URIs APISkype URIs provide a mechanism for launching Skype actions from web pages and applications. Developers can ...24.8Sierra Agent OSSierra Agent OS is the enterprise platform for building, deploying, and operating customer-facing AI agents...23.6High Fidelity Spatial Audio APIClient SDK and hosted spatial audio server for embedding real-time positional voice in web and native apps....23.4Cox Business Services APIREST API for Cox Business customers to manage voice, internet, and cloud connectivity services, including c...20.6Singtel CPaaS Voice APIProgrammable voice / VoIP calling embedded into business applications, sold as part of the Singtel CPaaS po...19.8Parloa Agent Management Platform (AMP)The Parloa Agent Management Platform (AMP) is the primary product surface for designing, testing, scaling, ...19.2ReadSpeaker speechCloud APIA cloud-based text-to-speech API. When using the API from within your software or application, you simply s...17.8NTT DOCOMO BUSINESS Developer PortalUnified API gateway for NTT Communications / NTT DOCOMO BUSINESS enterprise services. Catalogs APIs across ...17.0Intermedia Voice APIThe Intermedia Voice API enables developers to embed voice calling capabilities into CRMs, ERPs, ticketing ...16.2Replica APIReplica API v2 (OpenAPI 3.0.0) — REST API for AI text-to-speech, speech-to-speech, and voice-library operat...14.7Inmarsat GSPS APIThe GSPS (Global Satellite Phone Service) API supports Inmarsat's L-band geostationary satellite voice netw...13.5Open Voice Network APIAPI for the Open Voice Network, providing programmatic access to open standards and interoperability framew...11.8
Minimal 3 Almost no public developer surface
Rakuten CPaaS Confirm (OTP) APIOne-time PIN delivery and verification API for two-factor authentication and transaction confirmation, with...9.8BT Wholesale HubCo WHCE APIWholesale Hosted Centrex / Voice (WHCE) API for managing hosted voice services delivered via BT Wholesale's...8.5Global Voice Services APIInitiate ordering of phone numbers and configuration for BT Global Voice Services consumed by multinational...8.5

Companies reaching this through an API (36)

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 AT&T China Mobile Cox Communications DeepL Deutsche Telekom Dolby.io Gemini Global Relay Google Gemini Happyrobot Hopper Inmarsat Letta Microsoft Azure NTT OpenAI Orange Phonely Photon Engine Rakuten Mobile Realtime Salesforce Salesforce Service Cloud Sendbird ServiceNow ServiceTitan SK Telecom StepFun Telesign Telia Company Unity what3words Zendesk Zoom

Score breakdown

Frequency
69.2
log-scaled weighted occurrences
Breadth
5.6
spread across providers
Quality lift
38.8
mean composite of providers using it
Cohesion
20.3
strength of nearest seed neighbor

Related tags

SMS 66 co-occurrences Communications 60 co-occurrences Contact Center 43 co-occurrences Telephony 37 co-occurrences CPaaS 32 co-occurrences Messaging 73 co-occurrences Conversational AI 48 co-occurrences Text-to-Speech 31 co-occurrences

Where this tag comes from

Provider tag204
Api tag115
Openapi tag19
Openapi op tag68

Cohort brief

Auto-generated

The 192 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
192
all scored
Mean Kin Score
35.2
+11.3 vs catalog 23.9
Mean Agent Readiness
18.9
+6.9 vs catalog 12
Spread
3.2–82.2
median 35.8 · σ 17.7
How the 192 split by band
Exemplar 8Strong 22Developing 43Thin 57Emerging 40Minimal 22
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 35.2 19.8 +15.4 192
Developer Ergonomics 38.1 23.4 +14.7 192
Operational Transparency 23.4 14 +9.4 192
Access Clarity 35.8 26.5 +9.3 192
Discoverability 67.9 61.2 +6.7 192
Contract Governance 7.6 6.4 +1.2 192

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) 14% 10% +4
MCP server (first-party) 20% 13% +7
Agent Skills 0% 0% 0
OAuth scopes 10% 11% -1
Security 96% 97% -1
Arazzo workflows 3% 2% +1
Governance rules 16% 14% +2

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 Amazon Pinpoint 82.2
  2. 2 Infobip 75.4
  3. 3 Twilio 72.9
  4. 4 Zoom Phone 72.4
  5. 5 8x8 70.3
  6. 6 Orange Business 70.1
  7. 7 SignalWire 68.9
  8. 8 Amigo 67.2
  9. 9 Inworld AI 65.1
  10. 10 Spruce Health 64.9
Top by Agent Readiness
  1. 1 The Mobile First Company 52.9
  2. 2 Zoom Phone 52.2
  3. 3 Telnyx 51.4
  4. 4 AgentPhone 48.9
  5. 5 Infobip 48.7
  6. 6 Spruce Health 48.4
  7. 7 Amigo 46.7
  8. 8 Swisscom 45.9
  9. 9 Speko 44.4
  10. 10 Zavu 44.1
All 204 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 15 September 2026, across 27661 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"
All tags 
curl "https://apis.io/api/v1/tags?limit=25"
As a scored cohort 
curl "https://apis.io/api/v1/cohorts/tag/voice"
The distribution (Pro) 
curl "https://apis.io/api/v1/cohorts/tag/voice/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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

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