established · -0.2 market domain

Voice

Score 30.3 / 100 209 providers +58 via APIs 152 APIs Search apis.io →
Variants seen in the corpus: VoicesVoice

Providers using this tag (209)

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

Exemplar 9 Complete, well-documented, and agent-ready
InfobipTelecommunicationsCroatiaCPaaSMessaging48 APIs82.4ElevenLabsArtificial IntelligenceText-to-SpeechSpeech-to-Text12 APIs81.8TelnyxCommunicationsCPaaSSMS2 APIs79.6Amazon PinpointCampaignsCommunicationsEmailMarketing2 APIs78.9Amazon LexArtificial IntelligenceConversational AIChatbotsNatural Language Processing4 APIs78.1TwilioAuthenticationCommunicationsContact CenterEmail40 APIs77.8rtcStatsWebRTCObservabilityMonitoringDebugging2 APIs69.2SinchCommunicationsMessagingSMS10 APIs68.3Zoom PhoneTelecommunicationsUnited StatesUCaaSCloud PBX2 APIs67.4
Strong 24 Solid coverage with minor gaps
SignalWireCompanyCommunicationsCPaaS4 APIs65.48x8TelecommunicationsUnited StatesCPaaSUCaaS34 APIs65.3Orange Business5GArtificial IntelligenceB2BCAMARA12 APIs64.9AmigoCompanyArtificial IntelligenceHealthcareAI Agents2 APIs64.3BandwidthCommunicationsCPaaSMessaging3 APIs62.7VonageCommunicationsMessagingTelecommunicationsVideo Conferencing1 API62.2The Mobile First CompanyCompanyCommunicationsTelephony1 API62.0KPNTelecommunicationsNetherlandsMobile Network OperatorBroadband34 APIs61.9Spruce HealthHealthcareHIPAACommunicationsSecure Messaging16 APIs61.2Amazon PollyArtificial IntelligenceMachine LearningSpeech SynthesisText-to-Speech2 APIs61.0RingCentralCommunicationsUCaaSVideo1 API61.0ZavuCompanyMessagingSMSWhatsApp1 API60.1SynthflowVoice AgentsNo-CodeTelephony1 API60.0GladlyCustomer ServiceCustomer ExperienceContact CenterAI Customer Service1 API59.4SwisscomTelecommunicationsSwitzerlandMobile Network OperatorBroadband2 APIs59.1UnifonicCompanyEnterpriseCPaaSMessaging3 APIs59.0SyllableCompanyArtificial IntelligenceAI Agents1 API58.8KixieCompanySales EngagementTelephony3 APIs57.6HatchCompanyVertical SoftwareCustomer CommunicationConversational AI1 API57.4ActionpowerSpeech RecognitionSpeech-to-TextText-to-SpeechNatural Language Processing3 APIs57.3CloudTalkCompanyCommunicationsVoIP1 API56.7Tata CommunicationsTelecommunicationsIndiaWholesale CarrierCPaaS3 APIs56.1Amazon ConnectChatContact CenterCustomer Service22 APIs55.5Kore.aiCompanyArtificial IntelligenceConversational AIAgents3 APIs54.8
Developing 46 Usable, with meaningful gaps to close
Neutrino APIData ValidationData ToolsTelephonyCommunications2 APIs53.7SLNGCompanySpeechSpeech-to-Text7 APIs53.6AAA AIArtificial IntelligenceAgentsMulti-AgentLLM Orchestration1 API53.0SarvamCompanyAi MlArtificial IntelligenceMachine Learning1 API53.0QuoCompanyCommunicationsMessagingSMS1 API52.5Bright PatternCompanyContact CenterCCaaSCustomer Experience11 APIs52.2Route MobileTelecommunicationsIndiaCPaaSMessaging5 APIs51.0Reliance JioTelecommunicationsIndiaMobile Network OperatorNetwork APIs6 APIs50.5SpekoVoice AISpeech-to-TextText-to-Speech1 API50.5KaleyraCPaaSMessagingSMSWhatsApp1 API50.3NetomiCompanyArtificial IntelligenceAI AgentsCustomer Experience1 API50.0OutRivalCompanyEnterprise SaasConversational AIAI Agents2 APIs49.7AmazonAmazonAdvertisingAlexaE-Commerce2 APIs48.9SpeechmaticsSpeech RecognitionSpeech-to-TextTranscriptionReal-Time Transcription2 APIs48.6PuppetryCompanyArtificial IntelligenceVideoText-to-Speech1 API48.5DeepdubCompanyText-to-SpeechDubbing2 APIs48.4DailyDailyReal-TimeWebRTCVideo1 API47.5DiscordDiscordChatCommunicationsGaming3 APIs47.4Sonde HealthCompanyHealthHealthcareDigital Health1 API46.8KugelAudioText-to-SpeechSpeech SynthesisVoice AI1 API46.5NextivaCompanyCommunicationsContact Center5 APIs46.4Moore ThreadsCompanyGPUArtificial IntelligenceMachine Learning4 APIs46.3DeepgramArtificial IntelligenceSpeech-to-TextText-to-SpeechTranscription3 APIs46.1SendbirdCustomer SupportVideoOmnichannel1 API45.8UnisoundCompanyArtificial IntelligenceSpeech RecognitionText-to-Speech3 APIs45.8BirdCommunicationsSMSEmailWhatsApp23 APIs45.5Epic GamesAchievementsAnti-CheatCross-PlatformEOS1 API45.5Bharti AirtelTelecommunicationsIndiaMobile Network OperatorNetwork APIs8 APIs44.9Arpeggi LabsCompanyMusicAudioArtificial Intelligence1 API44.7Heidi HealthHealthcareHealth TechAI Medical ScribeAmbient AI1 API44.6PlayHTTTSText-to-SpeechVoice Cloning1 API42.8RokidSmart GlassesAugmented RealityWearablesArtificial Intelligence2 APIs42.5ShapesCompanyArtificial IntelligenceAI AgentsChat1 API42.4Cisco Voice PortalContact CenterIVRTelephony4 APIs42.3AgentPhoneCompanyTelephonyPhone NumbersSMS1 API42.2AssemblyAIArtificial IntelligenceAudioSpeechTranscription1 API41.8KotobaCompanyArtificial IntelligenceMachine Learning4 APIs41.8AvochatoMessagingSMSRCS7 APIs41.7WhippyCommunicationsMessagingSMSEmail1 API41.5CartesiaArtificial IntelligenceVoice AIText-to-SpeechSpeech-to-Text1 API41.4Smallest AIArtificial IntelligenceText-to-SpeechReal-Time1 API41.2PlivoCommunicationsCPaaSSMS1 API40.5Algebras AICompanyTranslationLocalizationInternationalization1 API40.3Retell AIArtificial IntelligenceAgentsReal-Time1 API39.9GliaCompanyCustomer ServiceContact CenterBanking3 APIs39.7NablaHealthcareAmbient AIClinical DocumentationMedical Transcription1 API39.4
Thin 55 Limited public surface area
11xCompanyArtificial IntelligenceAI AgentsSales1 API39.2Google VoiceGoogle VoiceMessagingPhoneTelecommunications1 API39.1DelphiCompanyArtificial IntelligenceAI ClonesDigital Minds1 API38.7Wispr FlowCompanySpeech-to-TextDictation1 API38.5engageSPARKCompanyMessagingSMS1 API38.4CometChatChatMessagingVideo1 API38.0VoiceittSpeech RecognitionSpeech-to-TextAccessibility1 API38.0ConcentrixAI AgentsBusiness Process OutsourcingConsultingConversational AI2 APIs37.9BurnerCompanyPhone NumbersSMSMMS1 API37.5QuarterzipCompanyAI AgentsCustomer SupportOnboarding37.3ExotelCloud TelephonySMSIndia1 API37.2SynthesiaArtificial IntelligenceGenerative AIVideoAvatars1 API37.1RainbowCommunicationsCPaaSChat3 APIs36.8ListnrArtificial IntelligenceText-to-SpeechTTS1 API36.5SMSAPIMessagingSMSMMS1 API36.4WellSaid LabsArtificial IntelligenceText-to-SpeechAudio1 API36.2PipecatArtificial IntelligenceMulti-ModalAgents1 API36.0Fish AudioText-to-SpeechSpeech-to-TextVoice Cloning1 API35.5VapiArtificial IntelligenceAgentsReal-Time1 API35.5ClickSendCommunicationsSMSMMS1 API35.3NarakeetText-to-SpeechTTSAudio1 API35.2SobotCompanyEnterpriseContact CenterCustomer Service4 APIs35.2DyteVideoReal-TimeWebRTC1 API35.0UberduckArtificial IntelligenceText-to-SpeechTTS1 API35.0LayercodeArtificial IntelligenceVoice AgentsReal-Time1 API34.6VoiceflowArtificial IntelligenceConversational AIChat1 API34.6Keyframe LabsCompanyArtificial IntelligenceAvatarsVideo1 API34.5SpeechifyArtificial IntelligenceText-to-SpeechSpeech Synthesis1 API34.3JustCallSMSCloud PhoneContact Center1 API34.2AlianzaCompanyCommunicationsCloud Communications2 APIs33.7Kalpa LabsCompanySpeechText-to-Speech1 API33.7Unreal SpeechText-to-SpeechTTSSpeech SynthesisAudio1 API33.3JitsiVideo ConferencingWebRTCReal-Time CommunicationOpen Source10 APIs33.2Resemble AIArtificial IntelligenceTTSVoice Cloning1 API33.1LemonflowCompanyArtificial IntelligenceAI AgentsCustomer Support1 API33.0Bland AIArtificial IntelligenceAgentsPhone1 API32.5Hume AIArtificial IntelligenceEmpathicEmotion4 APIs32.446elksCPaaSSMSMMS1 API31.9LiveKitReal-TimeWebRTCAudioVideo6 APIs31.5MiniMaxArtificial IntelligenceLLMInferenceMulti-Modal1 API31.4MoviusCompanyCommunicationsMessagingMobile1 API31.4AircallCommunicationsCloud PhoneCRM1 API31.3Inworld AIArtificial IntelligenceCharactersGames1 API31.2SonosCompanyConsumerAudioMusic1 API30.8AgoraReal-Time EngagementVideoSignaling11 APIs30.6MurfArtificial IntelligenceTTSVoiceover1 API30.3RingCaptcha (ThriveCom)CompanyTwo-Factor AuthenticationPhone VerificationOne-Time Passcode1 API29.7Rev AISpeech RecognitionSpeech-to-TextTranscriptionAudio7 APIs29.2DialpadCommunicationsArtificial IntelligenceContact Center1 API28.8TenfoldCompanyCTIContact CenterTelephony1 API28.7Africa's TalkingCommunicationsSMSUSSD1 API28.4RimeArtificial IntelligenceTTSReal-Time1 API28.3PoshArtificial IntelligenceConversational AIAI AgentsBanking1 API27.6OddcastCompanyText-to-SpeechSpeech SynthesisAvatars2 APIs27.4TalkdeskContact CenterCCaaSWebhook1 API27.2
Emerging 38 Early or largely undocumented
Custom Chat API | MirrorFlyChat APIMessagingCPaaSVoIP1 API25.9NuanceCompanySpeech RecognitionConversational AINatural Language Understanding5 APIs25.1AgentSeaCompanyArtificial IntelligenceAI AgentsAgent Orchestration2 APIs25.0Maxim AIArtificial IntelligenceLLMAgentsObservability1 API24.9Microsoft SkypeCommunicationsMessagingMicrosoftVideo2 APIs24.3High FidelityCompanyConsumerSpatial AudioAudio1 API23.7Wit.AICompanyNatural Language ProcessingNLPSpeech Recognition1 API23.7SynervozCompanyAudioSDK23.0SierraAgentsArtificial IntelligenceChatConversational AI1 API22.9VoquillCompanyDictationSpeech-to-Text22.5Tin CanCompanyConsumerHardwareTelecommunications21.7VoxerCompanyCommunicationsPush To TalkWalkie-Talkie21.3UJETCompanyEnterpriseContact CenterCCaaS20.8AnyvoiceArtificial IntelligenceText-to-SpeechSpeech Synthesis20.1DecagonAgentsArtificial IntelligenceChatConversational AI1 API20.0RinglyCompanyArtificial IntelligenceCustomer Support19.4Scaled CognitionArtificial IntelligenceAgentsLLMCustomer Experience1 API19.0SingtelTelecommunicationsSingaporeMobile Network OperatorNetwork APIs7 APIs18.6ParloaAgentsArtificial IntelligenceCall CenterCCaaS2 APIs17.4callagent.proAI AgentsTelephonyPhone Agents1 API17.0Pindrop SecurityCompanySecurityAuthentication17.0Uare.aiCompanyArtificial IntelligencePersonal AIDigital Twin16.8ReadSpeakerText-to-SpeechSpeechAudio1 API16.6Useful SensorsCompanyAi MlSpeech-to-TextText-to-Speech16.4BesideCompanySoftwareCommunications15.5YampaCompanyAi MlAI AgentsCustomer Service15.5AgentifAICompanyArtificial IntelligenceConversational AI14.6IntermediaCloudCommunicationsContact CenterVideo Conferencing5 APIs14.6NurixCompanyArtificial IntelligenceConversational AIAI Agents14.1Actium HealthCompanyHealthcarePatient EngagementConversational AI13.8Replica StudiosCompanyText-to-SpeechSpeech to Speech1 API13.8OpenEvidenceHealthcareClinical Decision SupportMedical AIGenerative AI13.2LatoCompanyArtificial IntelligenceAgentsMarket Research12.8SalientCompanyArtificial IntelligenceLendingLoan Servicing12.8InsurifyInsuranceMarketplaceComparisonAI Agents1 API12.3OutverseCompanyArtificial IntelligenceAI AgentsCustomer Support12.2FlossyCompanyArtificial IntelligenceAI AgentsHealthcare11.4Robylon AICustomer SupportAI AgentsConversational AI1 API11.1
Minimal 36 Almost no public developer surface
StoryboardCompanyFleet OperationsArtificial Intelligence10.9iBasisCompanyTelecom InfrastructureMessaging10.5Open Voice NetworkArtificial IntelligenceLinux FoundationStandards1 API10.1David AICompanyArtificial IntelligenceMachine LearningAudio Data10.0VolleyCompanyGamesEntertainment10.0Altira HealthCompanyHealthcareHealth TechClinical9.7ClubhouseCompanySocial AudioSocial NetworkLive Audio9.7PingerCompanyCommunicationsTelecommunicationsMessaging9.4getriffCompanyVideo ConferencingTeam CollaborationRemote Work9.2LightberryCompanyRoboticsArtificial IntelligenceConversational AI9.2ZymblyCompanyArtificial IntelligenceAviationAircraft Maintenance8.9DialupCompanySocialCommunications8.8BT GroupTelecommunicationsMobile NetworkBroadbandFibre15 APIs8.7ChimelabsCompanyArtificial IntelligenceReceptionist6.8SandbarCompanyConsumer HardwareWearables6.3HyroCompanyArtificial IntelligenceConversational AIAI Agents6.2VoxeetCompanyConferencingVideo5.8Atmee.aiCompanyArtificial IntelligenceAvatarsConversational AI4.7Daero GroupCompanyConstructionConstruction TechnologyField Operations4.3RcomCompanyTelecommunicationsEnterpriseNetworking4.0SnipsCompanyArtificial IntelligenceNatural Language Understanding3.6SonanticText-to-SpeechEmotive AIAcquired3.5Talk LabsCompanyArtificial IntelligenceCorporate Training3.4HUM IndustriesCompanyWearablesArtificial IntelligenceConsumer Hardware3.3Allegiance TelecomCompanyTelecommunicationsCLEC0.0Brooktrout TechnologyCompanyFaxTelephony0.0ClementineCompanyAcquiredDefunctEnterprise Communication0.0Conexant SystemsCompanySemiconductorsHardwareAudio0.0DrivetimeCompanyGamingEntertainment0.0Focal CommunicationsCompanyTelecommunicationsCLECLocal Exchange Carrier0.0inbilinCompanySocialMobile0.0OrativeCompanyEnterprise SoftwareConferencingCollaboration0.0SpeechlyCompanySpeech RecognitionSpoken Language Understanding1 API0.0TalkoCompanyCommunicationsMessaging0.0TalkrayCompanyMessagingCommunications0.0ToyTalkCompanyConversational AIChatbots0.0
Unrated 1 Not yet scored
VoiceraCompanyArtificial IntelligenceTranscription

APIs with this tag (150)

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 20 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...91.0OpenAI Agents SDKThe OpenAI Agents SDK is a lightweight framework for building multi-agent workflows in Python and TypeScrip...84.8OpenAI Realtime APIThe Realtime API from OpenAI — 9 operation(s) for realtime.84.8elevenlabs Voices APIEndpoints for managing voices including listing, creating, editing, and deleting voices in the library.81.8Twilio Voice APIThe Voice API from Twilio — 10 operation(s) for voice.77.8Microsoft Azure Communication Services APIAzure Communication Services provides multichannel communication APIs that enable developers to add voice, ...76.2Zendesk Talk APIThe Zendesk Talk API is the reference API for managing Zendesk voice capabilities. It provides endpoints fo...72.2Zendesk Talk Availabilities APIThe Zendesk Talk Availabilities API lets you manage and query agent availability for voice calls. It provid...72.2Zendesk Talk Digital Lines APIThe Zendesk Talk Digital Lines API lets you manage the digital lines in your Zendesk voice account. Digital...72.2Zendesk Talk Greetings APIThe Zendesk Talk Greetings API lets you manage the greetings used in your Zendesk voice account. Zendesk pr...72.2Zendesk Talk IVRs APIThe Zendesk Talk IVRs API lets you manage Interactive Voice Response systems that use keypad tones to route...72.2Zendesk Talk Lines APIThe Zendesk Talk Lines API lets you list the available lines, including both phone numbers and digital line...72.2Zendesk Talk Partner Edition APIThe Zendesk Talk Partner Edition API includes a Standard Call Object with endpoints to save, read, and upda...72.2Zendesk Talk Phone Numbers APIThe Zendesk Talk Phone Numbers API lets you manage the phone numbers in your Zendesk voice account. You can...72.2Zendesk Talk Recordings APIThe Zendesk Talk Recordings API lets you manage call recordings stored by Talk. Recordings are exposed in t...72.2Zendesk Talk Stats APIThe Zendesk Talk Stats API provides access to call statistics and current queue activity for your voice acc...72.2Zendesk Talk Voice Settings APIThe Zendesk Talk Voice Settings API lets you view and manage the account settings of your Zendesk voice acc...72.2Service Cloud Voice for Partner Telephony APIDeveloper API for connecting third-party telephony systems to Service Cloud Voice, including the Connector ...71.9Service Cloud Voice Telephony Integration APIREST API for integrating telephony systems with Service Cloud Voice, enabling programmatic management of vo...71.9ServiceNow Voice Interaction Resource APIThe ServiceNow Voice Interaction Resource API provides REST endpoints for integrating telephony and voice s...67.5
Strong 19 Solid coverage with minor gaps
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...65.48x8 CPaaS Voice WebhooksSubaccount-level HTTP POST callbacks emitted by the 8x8 CPaaS voice platform: VSS (Voice Session Summary) f...65.3AIMLAPI Voice APIThe Voice API from AIMLAPI — 2 operation(s) for voice.65.2Orange Business Talk APIProgrammable management for Business Talk, Orange Business's enterprise SIP trunking and IP voice service. ...64.9Orange Business Voice as a Service APIProgrammable voice / VoIP API for integrating outbound calls, IVR, and click-to-call into business applicat...64.9Vonage Voice APICreate and control voice calls62.2KPN Voice APICall related resource management61.9DialNexa Voices APIThe Voices API from DialNexa — 5 operation(s) for voices.61.2Amazon Polly Voices APIThe Voices API from Amazon Polly — 1 operation(s) for voices.61.0AutoContent API Voices APIThe voices API from AutoContent API — 2 operation(s) for voices.60.4Amazon Web Services Voices APIThe Voices API from Amazon Web Services — 1 operation(s) for voices.59.6Jasper Voices APIThe Voices API from Jasper — 2 operation(s) for voices.59.3Swisscom Voice Mail APILegacy Voice API for listing and retrieving recent voicemail messages for a Swisscom MSISDN, secured by OAu...59.1Swisscom Voice VoIP APILegacy Voice API cluster for controlling a Swisscom VoIP subscriber — placing and listing calls, managing c...59.1Fixie Voices APIThe voices API from Fixie — 4 operation(s) for voices.57.9Kixie Event APIThe primary Kixie automation surface. A single POST endpoint on the apig.kixie.com gateway that dispatches ...57.6Zoom Phone APIThe Zoom Phone API allows developers to access Zoom Phone functionality to build private services or public...55.8Amazon Voice ID APIAmazon Connect Voice ID provides real-time caller authentication and fraud risk detection to make voice int...55.5Anam.ai Voices APIThe Voices API from Anam.ai — 3 operation(s) for voices.54.4
Developing 54 Usable, with meaningful gaps to close
ServiceTitan Telecom APIRetrieve inbound and outbound call records, call recordings, call analytics, and call reasons. Powers Conta...53.6Letta Voice APIVoice (low-latency) chat completions endpoint for agents.52.4Phonic Voices APIThe voices API from Phonic — 2 operation(s) for voices.51.7Route Mobile Enterprise Voice 2.0 APIRoute Mobile's enterprise voice and cloud telephony surface, documented as narrative guides on the develope...51.0HeyMilo Voices APIBrowse the workspace voice registry for AI interviewer voices.50.8Gemini Live APILow-latency real-time voice and video interactions with Gemini using WebSockets for streaming multimodal in...50.7Vertex AI Gemini Live APIEnterprise real-time multimodal streaming API on Vertex AI for building low-latency voice and video AI agents.50.7Speko Voice APIThe Voice API from Speko — 8 operation(s) for voice.50.5Kaleyra Voice APIClick-to-call and outbound voice.50.3Gemini Live APILow-latency bidirectional streaming API enabling real-time voice and video interactions with Gemini models ...50.1DeepL Voice APIThe DeepL Voice API provides real-time speech transcription and translation. A POST to /v3/voice/realtime i...50.0AT&T Cloud Voice APIsREST APIs for AT&T Business Voice and Cloud Voice services enabling partners to manage service ordering, pr...49.7D-ID Voices APIList available TTS voices49.7Amazon Alexa Skills Kit APIThe Alexa Skills Kit (ASK) REST APIs enable developers to create, manage, test, and deploy custom voice ski...48.9ELBO AI, INC Voices APIThe Voices API from ELBO AI, INC — 1 operation(s) for voices.48.5Deepdub Voice APIThe Voice API from Deepdub — 2 operation(s) for voice.48.4StepFun Realtime APIBidirectional realtime voice over WebSocket (wss://api.stepfun.com/v1/realtime) with OpenAI Realtime-style ...47.9Gradium Voices APIManage custom voice clones47.7Discord Social SDKThe Discord Social SDK allows game developers to add rich social features into their games across desktop, ...47.4Discord Voice APIThe Discord Voice API provides the protocol for establishing and managing voice connections between clients...47.4Telia ACE Audio Stream Forwarding APIBidirectional streaming gRPC service over HTTP/2 that forwards copies of the audio streams in Telia ACE con...46.8KugelAudio Voices APIThe Voices API from KugelAudio — 6 operation(s) for voices.46.5HeyGen APIThe HeyGen REST API exposes video generation, avatar management, text-to-speech (Starfish), video translati...46.3HeyGen Voices APIVoice listing and voice-management endpoints.46.3Moore 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...46.3Moore 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 ...46.3Moore Threads AIBook Text-to-Speech APIHTTP and WebSocket speech synthesis. A non-streaming POST /api/v1/tts/generate returns a complete wav/mp3 f...46.3Happyrobot Voice APIThe Voice API from Happyrobot — 1 operation(s) for voice.46.1Tavus Voices APIThe Voices API from Tavus — 1 operation(s) for voices.45.9Sendbird Calls APIThe Sendbird Calls API provides voice and video calling capabilities, enabling real-time one-on-one and gro...45.8Unisound AI Open Platform Speech WebAPIWebSocket speech APIs on the Unisound AI Open Platform: one-sentence speech recognition (Mandarin, Cantones...45.8Google Cloud Text-To-Speech Voices APIThe Voices API from Google Cloud Text-To-Speech — 1 operation(s) for voices.45.6Bird Phone Numbers APISearch, purchase, and manage phone numbers inventory programmatically. Supports number search by country an...45.5Epic Online Services (EOS)Epic Online Services is Epic's free cross-platform backend for games. EOS exposes both a native C/C++ SDK (...45.5Epic Online Services Voice APIThe EOS Voice Interface delivers in-game voice chat using Vivox backend infrastructure, with positional aud...45.5Phonely Agents APIManage Phonely voice agents programmatically. Retrieve a single agent or list all agents for a user, and up...45.5Phonely Webhooks APIReceive structured post-call event data from Phonely after each AI voice interaction completes. The Send Ca...45.5Neuphonic Voices APIThe Voices API from Neuphonic — 2 operation(s) for voices.43.9PlayAI Text-to-Speech APIThe PlayAI Text-to-Speech API converts text into natural, human-like speech using the PlayDialog 1.0, Dialo...42.8PlayHT Voices APIPrebuilt voice catalog.42.8Cartesia Voices APIVoice catalog management and voice cloning.41.4Sarj AI Developer API Voices APIThe Voices API from Sarj AI Developer API — 3 operation(s) for voices.41.3Smallest AI Voices APIList prebuilt voices and manage cloned voices.41.2NUGU DevelopersDeveloper centre for NUGU, SK Telecom's Korean-language voice assistant platform, where third parties build...41.0SK Telecom Voice APIThe Voice API from SK Telecom — 1 operation(s) for voice.41.0Telesign Voice APISend voice messages including OTPs, alerts, and notifications to phone numbers worldwide. Supports text-to-...40.7Plivo Application APIThe Plivo Application API manages voice applications — bundles of XML/answer/hangup/fallback URLs (and mess...40.5Plivo Audio Stream APIThe Plivo Audio Stream API attaches a real-time WebSocket audio stream to a live call, enabling AI voice ag...40.5Plivo Conference APIThe Plivo Conference API manages live conference rooms — listing, retrieving members, kicking, muting, deaf...40.5Plivo Multiparty Call APIThe Plivo Multiparty Call API supports building multi-participant calls programmatically — adding/removing ...40.5Plivo Recording APIThe Plivo Recording API exposes call and conference recordings — listing, retrieving, downloading, and dele...40.5Plivo Verified Caller ID APIThe Plivo Verified Caller ID API allows trial accounts to verify outbound caller IDs for use as the From nu...40.5Plivo Voice Call APIThe Plivo Voice Call API initiates outbound calls, retrieves details for live and historical calls, and sup...40.5Plivo Zentrunk SIP Trunking APIThe Plivo Zentrunk SIP Trunking API manages termination and origination SIP trunks — outbound trunks (crede...40.5
Thin 39 Limited public surface area
Camb.AI Voices APIDiscover, clone, design, and manage voices.39.2China 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...39.1Delphi Voice APIStream voice responses and synthesize speech as real-time PCM audio.38.7iX Hello Customer v2 Outbound Calling APIPlaces outbound PSTN and SIP voice calls programmatically and runs an authored iX Hello flow on the call. T...37.9Burner APIOAuth 2.0 REST API for programmatic access to Burner line management, messaging (SMS/MMS) and configuration...37.5Colossyan Voices APIList available AI voices.37.2Exotel Voice APIPlace and control outbound voice calls.37.2Listnr Voices APIList the AI voices available on Listnr.36.5WellSaid Labs Voices APIDiscover available voice avatars.36.2Argil Voices APIClone, list, and sync voices.35.6Vapi Webhooks APIServer- and client-side webhook events emitted by Vapi during voice sessions, including end-of-call reports...35.5Podcastle Voices APIBrowse the voice library and create instant voice clones.35.4ClickSend Voice APISend and view voice (text-to-speech) messages.35.3Narakeet Voices APIList the voices available for audio and video production.35.2Uberduck Voices APIList, filter, and clone voices.35.0Global Relay Voice APIEndpoints for archiving voice and video recordings34.8Creatify Voices APICatalog of AI voices and accents.34.6Layercode Realtime Voice APIBidirectional realtime WebSocket transport that streams base64 PCM microphone audio from the browser to Lay...34.6Keyframe Labs Voices APIThe Voices API from Keyframe Labs — 2 operation(s) for voices.34.5Together AI Voices APIThe Voices API from Together AI — 1 operation(s) for voices.34.5Speechify Voices APIThe Voices API from Speechify — 2 operation(s) for voices.34.3JustCall REST APIREST API for placing calls, sending SMS and MMS messages, managing contacts, phone numbers, users, and call...34.2Vocode Voices APIThe Voices API from Vocode — 4 operation(s) for voices.34.0International Business Machines Voices APIManage available voices.33.1Bland AI Platform APIREST API for sending and managing AI phone calls, pathways (conversation flows), voices and voice clones, p...32.5Photon Voice APICross-platform low-latency voice chat built directly on top of Photon Realtime - it inherits Realtime's mat...32.4MiniMax Voice APIThe Voice API from MiniMax — 4 operation(s) for voice.31.4Aircall Calls APIThe Calls API from Aircall — 7 operation(s) for calls.31.3Inworld AI Voices APIVoice catalog and custom voice management31.2Inworld Realtime APILow-latency speech-to-speech voice API for natural conversation experiences. Included with all plans.31.2Agora Voice Calling APIThe Agora Voice Calling API embeds high-quality real-time voice chat into any application. Provides crystal...30.6Respeecher Voices APIThe voices API from Respeecher — 4 operation(s) for voices.29.7what3words AutoSuggest EndpointValidates and autocorrects partial or imperfect three-word input, returning ranked suggestions. Supports fo...29.7Messaging APIsA portfolio of messaging APIs including SMS Middle East and Africa, Messaging Pro Cameroon, Voice as a Serv...29.2Dialpad Calls APIThe Calls API from Dialpad — 7 operation(s) for calls.28.8HTS Assist (Agentic AI Customer Service)Agentic AI built specifically for airline and travel customer service, delivering end-to-end autonomous res...28.5Africa's Talking Voice APIOutbound calls, transfers, queue status, and media upload.28.4Aider Voice APIAider Voice-to-Code Input.27.9Vocalware Text-to-Speech APIVocalware is Oddcast's cloud text-to-speech service. It exposes a pay-as-you-go HTTP/REST API (suitable for...27.4
Emerging 14 Early or largely undocumented
Deutsche Telekom Voice APIDeliver high-quality voice experiences over the low-latency, feature-rich, global Deutsche Telekom network ...26.0MirrorFly Chat Platform APIToken-authenticated REST API for building in-app chat, split into User APIs and Admin APIs (users, contacts...25.9Azure Communication ServicesAzure Communication Services (successor to Skype developer APIs) provides cloud-based communication APIs fo...24.3Skype URIs APISkype URIs provide a mechanism for launching Skype actions from web pages and applications. Developers can ...24.3High Fidelity Spatial Audio APIClient SDK and hosted spatial audio server for embedding real-time positional voice in web and native apps....23.7Sierra Agent OSSierra Agent OS is the enterprise platform for building, deploying, and operating customer-facing AI agents...22.9Cox Business Services APIREST API for Cox Business customers to manage voice, internet, and cloud connectivity services, including c...20.1Singtel CPaaS Voice APIProgrammable voice / VoIP calling embedded into business applications, sold as part of the Singtel CPaaS po...18.6Parloa Agent Management Platform (AMP)The Parloa Agent Management Platform (AMP) is the primary product surface for designing, testing, scaling, ...17.4NTT DOCOMO BUSINESS Developer PortalUnified API gateway for NTT Communications / NTT DOCOMO BUSINESS enterprise services. Catalogs APIs across ...17.1ReadSpeaker Speech Cloud APIA cloud-based text-to-speech API. When using the API from within your software or application, you simply s...16.6Intermedia Voice APIThe Intermedia Voice API enables developers to embed voice calling capabilities into CRMs, ERPs, ticketing ...14.6Inmarsat GSPS APIThe GSPS (Global Satellite Phone Service) API supports Inmarsat's L-band geostationary satellite voice netw...13.8Replica APIReplica API v2 (OpenAPI 3.0.0) — REST API for AI text-to-speech, speech-to-speech, and voice-library operat...13.8
Minimal 4 Almost no public developer surface
Open Voice Network APIAPI for the Open Voice Network, providing programmatic access to open standards and interoperability framew...10.1Rakuten CPaaS Confirm (OTP) APIOne-time PIN delivery and verification API for two-factor authentication and transaction confirmation, with...10.0BT Wholesale HubCo WHCE APIWholesale Hosted Centrex / Voice (WHCE) API for managing hosted voice services delivered via BT Wholesale's...8.7Global Voice Services APIInitiate ordering of phone numbers and configuration for BT Global Voice Services consumed by multinational...8.7

Companies reaching this through an API (58)

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 Amazon Web Services Anam.ai Argil AT&T AutoContent API Camb.AI China Mobile Colossyan Cox Communications Creatify D-ID DeepL Deutsche Telekom DialNexa Fixie Gemini Global Relay Google Cloud Text-To-Speech Google Gemini Gradium Happyrobot HeyGen HeyMilo Hopper Inmarsat International Business Machines Jasper Letta Microsoft Azure Neuphonic NTT OpenAI Orange Origin Energy Phonely Phonic Photon Engine Podcastle Rakuten Mobile Respeecher Salesforce Salesforce Service Cloud APIs Sarj AI Developer API ServiceNow ServiceTitan SK Telecom StepFun TalkPix API
Show all 58 companies ↓
Tavus Telesign Telia Company Together AI Vocode what3words Zendesk Zoom

Score breakdown

Frequency
71.9
log-scaled weighted occurrences
Breadth
5.4
spread across providers
Quality lift
40.9
mean composite of providers using it
Cohesion
18.4
strength of nearest seed neighbor

Where this tag sits

209 providers carry this tag directly, and 391 counting the 6 narrower tags below — 182 more to reach.

Voice AI 116 providers Voice Agents 33 providers Speech-to-Text 50 providers Text-to-Speech 66 providers Speech Recognition 53 providers Speech Synthesis 13 providers

Related tags

SMS 62 co-occurrences Text-to-Speech 45 co-occurrences Conversational AI 64 co-occurrences Telephony 40 co-occurrences Communications 57 co-occurrences Contact Center 45 co-occurrences Messaging 70 co-occurrences CPaaS 30 co-occurrences

Where this tag comes from

Provider tag209
Api tag151
Openapi tag56
Openapi op tag171

Cohort brief

Auto-generated

The 197 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
197
all scored
Mean Kin Score
35.4
+12.5 vs catalog 22.9
Mean Agent Readiness
20.1
+8.2 vs catalog 11.9
Spread
0–82.4
median 35.3 · σ 18.8
How the 197 split by band
Exemplar 9Strong 24Developing 46Thin 55Emerging 38Minimal 25
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 33.3 17.6 +15.7 197
Developer Ergonomics 38.8 23.2 +15.6 197
Access Clarity 39.3 26.5 +12.8 197
Operational Transparency 25.2 13.7 +11.5 197
Discoverability 65.7 58.1 +7.6 197
Contract Governance 8.8 6.3 +2.5 197

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) 23% 14% +9
MCP server (first-party) 22% 12% +10
Agent Skills 0% 0% 0
OAuth scopes 11% 11% 0
Security 98% 98% 0
Arazzo workflows 4% 2% +2
Governance rules 20% 14% +6

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 Infobip 82.4
  2. 2 ElevenLabs 81.8
  3. 3 Telnyx 79.6
  4. 4 Amazon Pinpoint 78.9
  5. 5 Amazon Lex 78.1
  6. 6 Twilio 77.8
  7. 7 rtcStats 69.2
  8. 8 Sinch 68.3
  9. 9 Zoom Phone 67.4
  10. 10 SignalWire 65.4
Top by Agent Readiness
  1. 1 Telnyx 83.6
  2. 2 Infobip 63
  3. 3 Speko 60.5
  4. 4 Bird 57.8
  5. 5 The Mobile First Company 55.4
  6. 6 Synthflow 54
  7. 7 Zoom Phone 53.6
  8. 8 ElevenLabs 52.7
  9. 9 AgentPhone 48.9
  10. 10 Spruce Health 48.4
All 209 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"
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"

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