established · 2.4 market domain

Voice

Score 30.6 / 100 233 providers 121 APIs Search apis.io →
Variants seen in the corpus: Voicevoice

Providers using this tag (232)

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

Exemplar 7 Complete, well-documented, and agent-ready
SalesforceFortune 500Artificial IntelligenceAnalyticsCloud294 APIs83.3Amazon PinpointCampaignsCommunicationsEmailMarketing6 APIs83.1TwilioAuthenticationCommunicationsContact CenterEmail115 APIs73.4Zoom PhoneTelecommunicationsUnited StatesUCaaSCloud PBX3 APIs72.1InfobipTelecommunicationsCroatiaCPaaSMessaging47 APIs71.08x8TelecommunicationsUnited StatesCPaaSUCaaS36 APIs67.1Inworld AIArtificial IntelligenceText-to-SpeechSpeech-to-Text7 APIs66.7
Strong 31 Solid coverage with minor gaps
Dolby.ioMediaStreamingReal-Time StreamingWebRTC18 APIs65.5ServiceNowAutomationCloud ServicesDigital WorkflowsEnterprise Platform63 APIs64.8Spruce HealthHealthcareHIPAACommunicationsSecure Messaging15 APIs64.8SyllableCompanyArtificial IntelligenceAI Agents41 APIs64.8OpenAIArtificial IntelligenceLarge Language ModelsT151 APIs64.2AmigoCompanyArtificial IntelligenceHealthcareAI Agents72 APIs63.8SwisscomTelecommunicationsSwitzerlandMobile Network OperatorBroadband13 APIs63.8KPNTelecommunicationsNetherlandsMobile Network OperatorBroadband38 APIs61.9SynthflowVoice AgentsNo-CodeTelephony8 APIs61.8KixieCompanySales EngagementTelephony3 APIs60.5UnifonicCompanyEnterpriseCPaaSMessaging8 APIs59.7Amazon PollyArtificial IntelligenceMachine-LearningSpeech SynthesisText-to-Speech5 APIs59.6The Mobile First CompanyCompanyCommunicationsTelephony13 APIs59.1CloudTalkCompanyCommunicationsVoIP13 APIs59.0Reliance JioTelecommunicationsIndiaMobile Network OperatorNetwork APIs4 APIs58.4rtcStatsWebRTCObservabilityMonitoringDebugging1 API58.4RingCentralCommunicationsUCaaSVideo88 APIs58.2ZendeskChatCRMHelp CenterSell150 APIs58.1KaleyraCPaaSMessagingSMSWhatsApp6 APIs57.4Microsoft AzureAPI ManagementCloudCloud ComputingEnterprise1667 APIs57.3Route MobileTelecommunicationsIndiaCPaaSMessaging6 APIs57.2GladlyCustomer ServiceCXContact CenterAI Customer Service28 APIs57.0Neutrino APIData ValidationData ToolsTelephonyCommunications7 APIs56.9SLNGCompanySpeechSpeech-to-Text15 APIs56.9SinchCommunicationsMessagingSMS35 APIs56.5Bright PatternCompanyContact CenterCCaaSCustomer Experience14 APIs55.7AnamCompanyArtificial IntelligenceAvatarsConversational AI9 APIs55.4BandwidthCommunicationsCPaaSMessaging18 APIs55.3Telia CompanyTelecommunicationsSwedenNordicsBaltics24 APIs55.2ZavuCompanyMessagingSMSWhatsApp21 APIs55.2OpenPhoneCompanyCommunicationsSMS9 APIs55.0
Developing 56 Usable, with meaningful gaps to close
Bharti AirtelTelecommunicationsIndiaMobile Network OperatorNetwork APIs5 APIs53.9ServiceTitanField Service ManagementTradesHVACPlumbing55 APIs53.5VonageCommunicationsMessagingTelecommunicationsVideo Conferencing9 APIs53.2ReplicantCompanyContact CenterConversational AICustomer Service1 API52.6SyniverseTelecommunicationsUnited StatesCPaaSMessaging12 APIs52.3SpekoVoice AISpeech-to-TextText-to-Speech4 APIs52.2DeepdubCompanyText-to-SpeechDubbing7 APIs52.0GSMA Open GatewayTelecommunicationsUnited KingdomNetwork APIsCAMARA22 APIs51.9NextivaCompanyCommunicationsContact Center5 APIs51.9OutRivalCompanyEnterprise SaasConversational AIAI Agents25 APIs51.9AmazonAmazonAdvertisingAlexaE-Commerce18 APIs51.5ZoomChatCollaborationCommunicationsMeetings47 APIs51.1AT&T5GBroadbandCAMARAConnectivity28 APIs50.9QuoCompanyCommunicationsMessagingSMS9 APIs50.9KugelAudioText-to-SpeechSpeech SynthesisVoice AI14 APIs50.7SarvamCompanyAi MlArtificial IntelligenceMachine-Learning8 APIs50.4DeepLArtificial IntelligenceDeep LearningGlossaryLocalization7 APIs49.9HatchCompanyVertical SoftwareCustomer CommunicationConversational AI1 API49.6DiscordChatCommunicationsGamingMessaging29 APIs49.4Heidi HealthHealthcareHealth TechAI Medical ScribeAmbient AI11 APIs49.4Tata CommunicationsTelecommunicationsIndiaWholesale CarrierCPaaS6 APIs49.4ELBO AI, INCCompanyArtificial IntelligenceVideoText-to-Speech5 APIs49.3PhonelyArtificial IntelligenceVoice AIVoice AgentsConversational AI2 APIs48.7Arpeggi LabsCompanyMusicAudioArtificial Intelligence5 APIs48.0Sendbird7 APIs48.0NetomiCompanyArtificial IntelligenceAgentic AICustomer Experience2 APIs47.8StepFunArtificial IntelligenceLLMMulti-ModalChat Completion12 APIs47.8Salesforce Service CloudCase ManagementCRMCustomer ServiceHelp Desk18 APIs47.6Amazon ConnectChatContact CenterCustomer Service22 APIs47.3Epic GamesAchievementsAnti-CheatCross-PlatformEOS14 APIs47.0UnisoundCompanyArtificial IntelligenceSpeech RecognitionText-to-Speech3 APIs47.0GeminiAgentsArtificial IntelligenceAudio UnderstandingBatch Processing20 APIs46.0AIMLAPIArtificial IntelligenceMachine-LearningAI ModelsLLM10 APIs45.7ShapesCompanyArtificial IntelligenceAI AgentsChat3 APIs45.7KotobaCompanyArtificial IntelligenceMachine-Learning1 API45.3China MobileTelecommunicationsChinaMobile Network OperatorNetwork APIs6 APIs45.1LettaArtificial IntelligenceAgentsStateful AgentsMemory41 APIs45.0UnityReal-Time 3DGame EngineGamingMultiplayer19 APIs45.0SK TelecomTelecommunicationsSouth KoreaMobile Network OperatorNetwork APIs15 APIs44.5BirdCommunicationsSMSEmailWhatsApp10 APIs44.2PlivoCommunicationsCPaaSSMS24 APIs44.0Wispr AICompanySpeech-to-TextDictation50 APIs43.7NablaHealthcareAmbient AIClinical DocumentationMedical Transcription5 APIs43.5Algebras AI Inc.CompanyTranslationLocalizationInternationalization9 APIs43.2AgentPhoneCompanyTelephonyPhone NumbersSMS13 APIs43.1Smallest AIArtificial IntelligenceText-to-SpeechReal-Time4 APIs43.1Google VoiceGoogle VoiceMessagingPhoneTelecommunications2 APIs42.6Google GeminiAgentic AIArtificial IntelligenceCode GenerationEmbeddings15 APIs42.4RokidSmart GlassesAugmented RealityWearablesArtificial Intelligence2 APIs42.2GliaCompanyCustomer ServiceContact CenterBanking3 APIs41.0DelphiCompanyArtificial IntelligenceAI ClonesDigital Minds8 APIs40.7VoiceittSpeech RecognitionSpeech-to-TextAccessibility3 APIs40.4TelesignAuthenticationCommunicationsFraud PreventionPhone Intelligence5 APIs40.1ListnrArtificial IntelligenceText-to-SpeechTTS3 APIs39.5UberduckArtificial IntelligenceText-to-SpeechTTS4 APIs39.5BurnerCompanyPhone NumbersSMSMMS1 API39.4
Thin 62 Limited public surface area
MavenirTelecommunicationsUnited StatesNetwork VendorNetwork APIs3 APIs39.2RainbowCommunicationsCPaaSChat7 APIs39.1WellSaid LabsArtificial IntelligenceText-to-SpeechAudio4 APIs39.0Orange Business5GArtificial IntelligenceB2BCAMARA38 APIs38.9SobotCompanyEnterpriseContact CenterCustomer Service4 APIs38.9Keyframe LabsCompanyArtificial IntelligenceAvatarsVideo4 APIs38.8SMSAPIMessagingSMSMMS11 APIs38.6Kalpa LabsCompanySpeechText-to-Speech3 APIs38.2NarakeetText-to-SpeechTTSAudio4 APIs38.2SpeechifyArtificial IntelligenceText-to-SpeechSpeech Synthesis2 APIs38.2Fish AudioText-to-SpeechSpeech-to-TextVoice Cloning5 APIs38.1CometChatChatMessagingVideo13 APIs38.0QuarterzipCompanyAI AgentsCustomer-SupportOnboarding38.0LayercodeArtificial IntelligenceVoice AgentsReal-Time5 APIs37.911xCompanyArtificial IntelligenceAI AgentsSales1 API37.8DyteVideoReal-TimeWebRTC6 APIs37.8PlayHTTTSText-to-SpeechVoice Cloning8 APIs37.7ClickSendCommunicationsSMSMMS10 APIs37.5Unreal SpeechText-to-SpeechTTSSpeech SynthesisAudio3 APIs37.0PipecatArtificial IntelligenceMulti-ModalAgents7 APIs36.8Global RelayArchivingComplianceData RetentionEmail Security5 APIs36.5TelefonieCall RecordingCPaaSMessagingNumber Provisioning6 APIs36.0TelefonCall RecordingCommunicationsCPaaSGlobal Coverage7 APIs35.1WhippyCommunicationsMessagingSMSEmail7 APIs35.1TelefoonBelgiumCPaaSEU Data ResidencyEurope5 APIs35.0Photon EngineGamingMultiplayerReal-TimeNetcode9 APIs34.9JustCallSMSCloud PhoneContact Center4 APIs34.8AlianzaCompanyCommunicationsCloud Communications60 APIs34.3TelnyxCommunicationsCPaaSSMS168 APIs34.0Hume AIArtificial IntelligenceEmpathicEmotion9 APIs33.8JitsiVideo ConferencingWebRTCReal-Time CommunicationOpen-Source10 APIs33.546elksCPaaSSMSMMS5 APIs33.4LemonflowCompanyArtificial IntelligenceAI AgentsCustomer-Support1 API33.1TenfoldCompanyCTIContact CenterTelephony8 APIs33.0what3wordsGeocodingAddressingLocationThree Word Address20 APIs33.0MoviusCompanyCommunicationsMessagingMobile1 API32.7LiveKitReal-TimeWebRTCAudioVideo6 APIs32.4Cisco Voice PortalContact CenterIVRTelephony24 APIs32.2OrangeNetworkTelecomIdentityMessaging15 APIs32.1Inworld AIArtificial IntelligenceCharactersGames10 APIs31.9AircallCommunicationsCloud PhoneCRM16 APIs31.7VoiceflowArtificial IntelligenceConversationalChat5 APIs31.7Africa's TalkingCommunicationsSMSUSSD6 APIs31.4engageSPARKCompanyMessagingSMS7 APIs31.4Retell AIArtificial IntelligenceAgentsReal-Time78 APIs31.1RingCaptcha (ThriveCom)CompanyTwo-Factor AuthenticationPhone VerificationOne-Time Passcode1 API31.1VapiArtificial IntelligenceAgentsReal-Time16 APIs30.9DialpadCommunicationsArtificial IntelligenceContact Center16 APIs30.7Resemble AIArtificial IntelligenceTTSVoice Cloning26 APIs30.5MiniMaxArtificial IntelligenceLLMInferenceMulti-Modal7 APIs30.3SonosCompanyConsumerAudioMusic1 API30.3Bland AIArtificial IntelligenceAgentsPhone2 APIs30.0ExotelCloud TelephonySMSIndia6 APIs29.9OddcastCompanyText-to-SpeechSpeech SynthesisAvatars2 APIs28.9WellSaid LabsArtificial IntelligenceText-to-SpeechTTS4 APIs28.8MurfArtificial IntelligenceTTSVoiceover7 APIs28.4ClickSend SMSSMSMMSMessaging1 API28.3AgoraReal-Time EngagementVideoSignaling11 APIs28.2RimeArtificial IntelligenceTTSReal-Time2 APIs28.1AiderArtificial IntelligenceAI Pair ProgrammingDeveloper ToolsCLI15 APIs27.9Deutsche TelekomTelecommunicationsTelcoMobile Network OperatorCPaaS50 APIs27.6TalkdeskContact CenterCCaaSWebhook1 API26.8
Emerging 39 Early or largely undocumented
NuanceCompanySpeech RecognitionConversational AINatural Language Understanding5 APIs24.9Tin CanCompanyConsumerHardwareTelecommunications24.8SynervozCompanyAudioSDK23.8Epic GamesGame ServicesGamingCross-PlatformAchievements10 APIs23.6SierraAgentsArtificial IntelligenceChatConversational AI1 API23.6Wit.AICompanyNatural Language ProcessingNLPSpeech Recognition1 API23.6High FidelityCompanyConsumerSpatial AudioAudio1 API23.2VoquillCompanyDictationSpeech-to-Text22.9Maxim AIArtificial IntelligenceLLMAgentsObservability1 API21.8Microsoft SkypeCommunicationsMessagingMicrosoftVideo2 APIs21.7Wispr FlowCompanyDictationSpeech-to-Text21.2Cox CommunicationsTelecommunicationsBroadbandCable TVInternet3 APIs20.6RinglyCompanyArtificial IntelligenceCustomer-Support20.1UJETCompanyEnterpriseContact CenterCCaaS20.1VoxerCompanyCommunicationsPush To TalkWalkie-Talkie20.1DecagonAgentsArtificial IntelligenceChatConversational AI1 API19.8SingtelTelecommunicationsSingaporeMobile Network OperatorNetwork APIs7 APIs19.8SpeechlyCompanySpeech RecognitionSpoken Language Understanding1 API19.6ParloaAgentsArtificial IntelligenceCall CenterCCaaS2 APIs19.2Useful SensorsCompanyAi MlSpeech-to-TextText-to-Speech17.4RealtimeReal-TimeWebSocketWebRTCServer-Sent Events26 APIs17.0IntermediaCloudCommunicationsContact CenterVideo Conferencing5 APIs16.2BesideCompanySoftwareCommunications16.1Uare.aiCompanyArtificial IntelligencePersonal AIDigital Twin16.0ReadSpeakerText-to-SpeechSpeechAudio1 API15.9Pindrop SecurityCompanySecurityAuthentication15.8YampaCompanyAi MlAI AgentsCustomer Service15.7Replica StudiosCompanyText-to-SpeechSpeech to Speech1 API14.7HopperTravelMarketplaceFintechPrice Freeze7 APIs14.4OpenEvidenceHealthcareClinical Decision SupportMedical AIGenerative AI14.2NurixCompanyArtificial IntelligenceConversational AIAgentic AI14.1SalientCompanyArtificial IntelligenceLendingLoan Servicing13.4InsurifyInsuranceMarketplaceComparisonAI Agents1 API13.1OutverseCompanyArtificial IntelligenceAI AgentsCustomer-Support12.8LatoCompanyArtificial IntelligenceAgentsMarket Research12.7NTTTelecommunicationsMobile NetworksEnterprise CloudSmart Data Platform6 APIs12.2FlossyCompanyArtificial IntelligenceAI AgentsHealthcare11.8Open Voice NetworkArtificial IntelligenceLinux FoundationStandards1 API11.8StoryboardCompanyFleet OperationsArtificial Intelligence11.5
Minimal 37 Almost no public developer surface
David AICompanyArtificial IntelligenceMachine-LearningAudio Data10.6VolleyCompanyGamesEntertainment10.6iBasisCompanyTelecom InfrastructureMessaging10.4ClubhouseCompanySocial AudioSocial NetworkingLive Audio10.2LightberryCompanyRoboticsArtificial IntelligenceConversational AI10.2Altira HealthCompanyHealthcareHealth TechnologyClinical10.0getriffCompanyVideo ConferencingTeam CollaborationRemote Work9.7ZymblyCompanyArtificial IntelligenceAviationAircraft Maintenance9.6DialupCompanySocialCommunications9.2BT GroupTelecommunicationsTelcoMobile NetworkBroadband15 APIs8.5Chimelabs Holdings PTY LTDCompanyArtificial IntelligenceReceptionist8.5InmarsatSatellite CommunicationsSATCOMMaritimeAviation7 APIs8.2Rakuten MobileTelecommunicationsMobile Network OperatorCarrier5G3 APIs7.9VoxeetCompanyConferencingVideo7.5SandbarCompanyConsumer HardwareWearables7.1Atmee.aiCompanyArtificial IntelligenceAvatarsConversational AI6.4ToyTalkCompanyConversational AIChatbots6.4Daero GroupCompanyConstructionConstruction TechnologyField Operations6.0HyroCompanyArtificial IntelligenceConversational AIAI Agents5.4SnipsCompanyArtificial IntelligenceNatural Language Understanding5.3Brooktrout TechnologyCompanyFaxTelephony5.0ClementineCompanyAcquiredDefunctEnterprise Communication5.0Conexant SystemsCompanySemiconductorsHardwareAudio5.0Cord *CompanyConsumerMessaging5.0DrivetimeCompanyGamingEntertainment5.0HUM IndustriesCompanyWearablesArtificial IntelligenceConsumer Hardware5.0inbilinCompanySocialMobile5.0OrativeCompanyEnterprise SoftwareConferencingCollaboration5.0SonanticText-to-SpeechEmotive AIAcquired5.0TalkoCompanyCommunicationsMessaging5.0TalkrayCompanyMessagingCommunications5.0VoiceraCompanyArtificial IntelligenceTranscription5.0RcomCompanyTelecommunicationsEnterpriseNetworking3.2Talk LabsCompanyArtificial IntelligenceCorporate Training2.2Custom Chat API | MirrorFlyChat APIMessagingCPaaSVoIP1 API1.5Allegiance TelecomCompanyTelecommunicationsCLEC0.6Focal CommunicationsCompanyTelecommunicationsCLECLocal Exchange Carrier0.6

APIs with this tag (120)

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 8 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...83.3Twilio Voice APIThe Voice API from Twilio — 10 operation(s) for voice.73.4Zoom Phone APIThe Zoom Phone API is the administrative and operational REST API for Zoom's cloud phone system. The harves...72.1Infobip Voice APIInfobip Voice API allows you to engage into voice communication with your customer using the Voice API feat...71.08x8 Contact Center Call API Reference8x8 Contact Center Call API for controlling in-progress phone interactions handled by contact center agents.67.18x8 CPaaS Voice WebhooksSubaccount-level HTTP POST callbacks emitted by the 8x8 CPaaS voice platform: VSS (Voice Session Summary) f...67.1Number Masking API8x8 Number Masking API that bridges two parties through virtual numbers so neither participant sees the oth...67.1Voice API8x8 Connect Voice API for programmable outbound and inbound calling, callflows, voice messaging and IVR ses...67.1
Strong 25 Solid coverage with minor gaps
Dolby.io Communications APILegacy Communications APIs for high-quality WebRTC voice and video conferencing with spatial audio, music m...65.5ServiceNow Voice Interaction Resource APIThe ServiceNow Voice Interaction Resource API provides REST endpoints for integrating telephony and voice s...64.8OpenAI Agents SDKThe OpenAI Agents SDK is a lightweight framework for building multi-agent workflows in Python and TypeScrip...64.2OpenAI Realtime APIThe Realtime API from OpenAI — 9 operation(s) for realtime.64.2Swisscom Voice Mail APILegacy Voice API for listing and retrieving recent voicemail messages for a Swisscom MSISDN, secured by OAu...63.8Swisscom Voice VoIP APILegacy Voice API cluster for controlling a Swisscom VoIP subscriber — placing and listing calls, managing c...63.8Apidaze Voice CPaaS API (via KPN)This REST API exposes actions that help your apps to interact with APIdaze’s Telco platform in mulitples wa...61.9Vonage Phone Numbers API (via KPN)The Numbers API lets you manage your numbers and buy new virtual numbers for use with Vonage's APIs. ## Pre...61.9Vonage Voice API (via KPN)The Voice API lets you create outboud calls, control in progress calls and get information about current an...61.9Kixie Event APIThe primary Kixie automation surface. A single POST endpoint on the apig.kixie.com gateway that dispatches ...60.5Zendesk Talk APIThe Zendesk Talk API is the reference API for managing Zendesk voice capabilities. It provides endpoints fo...58.1Zendesk Talk Availabilities APIThe Zendesk Talk Availabilities API lets you manage and query agent availability for voice calls. It provid...58.1Zendesk Talk Digital Lines APIThe Zendesk Talk Digital Lines API lets you manage the digital lines in your Zendesk voice account. Digital...58.1Zendesk Talk Greetings APIThe Zendesk Talk Greetings API lets you manage the greetings used in your Zendesk voice account. Zendesk pr...58.1Zendesk Talk IVRs APIThe Zendesk Talk IVRs API lets you manage Interactive Voice Response systems that use keypad tones to route...58.1Zendesk Talk Lines APIThe Zendesk Talk Lines API lets you list the available lines, including both phone numbers and digital line...58.1Zendesk Talk Partner Edition APIThe Zendesk Talk Partner Edition API includes a Standard Call Object with endpoints to save, read, and upda...58.1Zendesk Talk Phone Numbers APIThe Zendesk Talk Phone Numbers API lets you manage the phone numbers in your Zendesk voice account. You can...58.1Zendesk Talk Recordings APIThe Zendesk Talk Recordings API lets you manage call recordings stored by Talk. Recordings are exposed in t...58.1Zendesk Talk Stats APIThe Zendesk Talk Stats API provides access to call statistics and current queue activity for your voice acc...58.1Zendesk Talk Voice Settings APIThe Zendesk Talk Voice Settings API lets you view and manage the account settings of your Zendesk voice acc...58.1Kaleyra Voice APIClick-to-call and outbound voice.57.4Microsoft Azure Communication Services APIAzure Communication Services provides multichannel communication APIs that enable developers to add voice, ...57.3Route Mobile Enterprise Voice 2.0 APIRoute Mobile's enterprise voice and cloud telephony surface, documented as narrative guides on the develope...57.2Telia ACE Audio Stream Forwarding APIBidirectional streaming gRPC service over HTTP/2 that forwards copies of the audio streams in Telia ACE con...55.2
Developing 44 Usable, with meaningful gaps to close
Airtel IQ Reporting APIThe Call Detail Record (CDR) reporting surface of Airtel IQ. Returns detailed per-call records — time, date...53.9ServiceTitan Telecom APIRetrieve inbound and outbound call records, call recordings, call analytics, and call reasons. Powers Conta...53.5Vonage Voice APICreate and control voice calls53.2Replicant Outbound APIPlaces outbound AI voice calls and SMS messages through Replicant against a pre-configured campaign, and no...52.6Syniverse Omni-Channel Messaging API (SCG)The Syniverse Communication Gateway (SCG) API — the core of the Syniverse Developer Community platform. 72 ...52.3Speko Voice APIThe Voice API from Speko — 8 operation(s) for voice.52.2Deepdub Voice APIThe Voice API from Deepdub — 2 operation(s) for voice.52.0CAMARA Call Forwarding Signal APICAMARA Call Forwarding Signal 0.4.0 as certified under GSMA Open Gateway. Exposes whether unconditional or ...51.9Amazon Alexa Skills Kit APIThe Alexa Skills Kit (ASK) REST APIs enable developers to create, manage, test, and deploy custom voice ski...51.5Zoom Phone APIThe Zoom Phone API allows developers to access Zoom Phone functionality to build private services or public...51.1AT&T Cloud Voice APIsREST APIs for AT&T Business Voice and Cloud Voice services enabling partners to manage service ordering, pr...50.9DeepL Voice APIThe DeepL Voice API provides real-time speech transcription and translation. A POST to /v3/voice/realtime i...49.9Discord Social SDKThe Discord Social SDK allows game developers to add rich social features into their games across desktop, ...49.4Discord Voice APIThe Voice API from Discord — 1 operation(s) for voice.49.4Phonely Agents APIManage Phonely voice agents programmatically. Retrieve a single agent or list all agents for a user, and up...48.7Phonely Webhooks APIReceive structured post-call event data from Phonely after each AI voice interaction completes. The Send Ca...48.7Sendbird Calls APIThe Sendbird Calls API provides voice and video calling capabilities, enabling real-time one-on-one and gro...48.0StepFun Realtime APIBidirectional realtime voice over WebSocket (wss://api.stepfun.com/v1/realtime) with OpenAI Realtime-style ...47.8Service Cloud Voice for Partner Telephony APIDeveloper API for connecting third-party telephony systems to Service Cloud Voice, including the Connector ...47.6Service Cloud Voice Telephony Integration APIREST API for integrating telephony systems with Service Cloud Voice, enabling programmatic management of vo...47.6Amazon Voice ID APIAmazon Connect Voice ID provides real-time caller authentication and fraud risk detection to make voice int...47.3Epic Online Services (EOS)Epic Online Services is Epic's free cross-platform backend for games. EOS exposes both a native C/C++ SDK (...47.0Unisound AI Open Platform Speech WebAPIWebSocket speech APIs on the Unisound AI Open Platform: one-sentence speech recognition (Mandarin, Cantones...47.0Gemini Live APILow-latency bidirectional streaming API enabling real-time voice and video interactions with Gemini models ...46.0AIMLAPI Voice APIThe Voice API from AIMLAPI — 2 operation(s) for voice.45.7China 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...45.1OneNET Voice Call Service (VCS) API语音通话 (Voice Call Service) is China Mobile's publicly documented voice capability on the OneNET gateway, rea...45.1Letta Voice APIVoice (low-latency) chat completions endpoint for agents.45.0Unity 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...44.5Bird Phone Numbers APISearch, purchase, and manage phone numbers inventory programmatically. Supports number search by country an...44.2Plivo Application APIThe Plivo Application API manages voice applications — bundles of XML/answer/hangup/fallback URLs (and mess...44.0Plivo Audio Stream APIThe Plivo Audio Stream API attaches a real-time WebSocket audio stream to a live call, enabling AI voice ag...44.0Plivo Conference APIThe Plivo Conference API manages live conference rooms — listing, retrieving members, kicking, muting, deaf...44.0Plivo Multiparty Call APIThe Plivo Multiparty Call API supports building multi-participant calls programmatically — adding/removing ...44.0Plivo Recording APIThe Plivo Recording API exposes call and conference recordings — listing, retrieving, downloading, and dele...44.0Plivo Verified Caller ID APIThe Plivo Verified Caller ID API allows trial accounts to verify outbound caller IDs for use as the From nu...44.0Plivo Voice Call APIThe Plivo Voice Call API initiates outbound calls, retrieves details for live and historical calls, and sup...44.0Plivo Zentrunk SIP Trunking APIThe Plivo Zentrunk SIP Trunking API manages termination and origination SIP trunks — outbound trunks (crede...44.0Gemini Live APILow-latency real-time voice and video interactions with Gemini using WebSockets for streaming multimodal in...42.4Vertex AI Gemini Live APIEnterprise real-time multimodal streaming API on Vertex AI for building low-latency voice and video AI agents.42.4Delphi Voice APIStream voice responses and synthesize speech as real-time PCM audio.40.7Telesign Voice APISend voice messages including OTPs, alerts, and notifications to phone numbers worldwide. Supports text-to-...40.1Burner APIOAuth 2.0 REST API for programmatic access to Burner line management, messaging (SMS/MMS) and configuration...39.4
Thin 22 Limited public surface area
Mavenir BYON Call Handling API (VVoIP Service)A Mavenir-authored OpenAPI 3.0.0 definition for a Bring Your Own Number (BYON) one-to-one voice and video c...39.2Orange Business Business Talk APIProgrammable management for Business Talk, Orange Business's enterprise SIP trunking and IP voice service. ...38.9Orange Business Voice as a Service APIProgrammable voice / VoIP API for integrating outbound calls, IVR, and click-to-call into business applicat...38.9Layercode Realtime Voice APIBidirectional realtime WebSocket transport that streams base64 PCM microphone audio from the browser to Lay...37.9ClickSend Voice APISend and view voice (text-to-speech) messages.37.5Global Relay Voice APIEndpoints for archiving voice and video recordings36.5Photon Voice APICross-platform low-latency voice chat built directly on top of Photon Realtime - it inherits Realtime's mat...34.9JustCall REST APIREST API for placing calls, sending SMS and MMS messages, managing contacts, phone numbers, users, and call...34.8what3words AutoSuggest EndpointValidates and autocorrects partial or imperfect three-word input, returning ranked suggestions. Supports fo...33.0Messaging APIsA portfolio of messaging APIs including SMS Middle East and Africa, Messaging Pro Cameroon, Voice as a Serv...32.1Inworld Realtime APILow-latency speech-to-speech voice API for natural conversation experiences. Included with all plans.31.9Aircall Calls APIThe Calls API from Aircall — 7 operation(s) for calls.31.7Africa's Talking Voice APIOutbound calls, transfers, queue status, and media upload.31.4Vapi Webhooks APIServer- and client-side webhook events emitted by Vapi during voice sessions, including end-of-call reports...30.9Dialpad Calls APIThe Calls API from Dialpad — 7 operation(s) for calls.30.7MiniMax Voice APIThe Voice API from MiniMax — 4 operation(s) for voice.30.3Bland AI Platform APIREST API for sending and managing AI phone calls, pathways (conversation flows), voices and voice clones, p...30.0Exotel Voice APIPlace and control outbound voice calls.29.9Vocalware Text-to-Speech APIVocalware is Oddcast's cloud text-to-speech service. It exposes a pay-as-you-go HTTP/REST API (suitable for...28.9Agora Voice Calling APIThe Agora Voice Calling API embeds high-quality real-time voice chat into any application. Provides crystal...28.2Aider Voice APIAider Voice-to-Code Input.27.9Deutsche Telekom Voice APIDeliver high-quality voice experiences over the low-latency, feature-rich, global Deutsche Telekom network ...27.6
Emerging 16 Early or largely undocumented
Epic Online Services Voice APIThe EOS Voice Interface delivers in-game voice chat using Vivox backend infrastructure, with positional aud...23.6Sierra 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....23.2Azure Communication ServicesAzure Communication Services (successor to Skype developer APIs) provides cloud-based communication APIs fo...21.7Skype URIs APISkype URIs provide a mechanism for launching Skype actions from web pages and applications. Developers can ...21.7Cox 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, ...19.2Agora.ioA realtime engagement platform offering Video Calling, Voice Calling, Signaling, Chat, and a Conversational...17.0LiveKitAn open-source WebRTC platform marketed as "The platform for voice, video, and physical AI agents." LiveKit...17.0Intermedia Voice APIThe Intermedia Voice API enables developers to embed voice calling capabilities into CRMs, ERPs, ticketing ...16.2ReadSpeaker speechCloud APIA cloud-based text-to-speech API. When using the API from within your software or application, you simply s...15.9Replica APIReplica API v2 (OpenAPI 3.0.0) — REST API for AI text-to-speech, speech-to-speech, and voice-library operat...14.7HTS Assist (Agentic AI Customer Service)Agentic AI built specifically for airline and travel customer service, delivering end-to-end autonomous res...14.4NTT DOCOMO BUSINESS Developer PortalUnified API gateway for NTT Communications / NTT DOCOMO BUSINESS enterprise services. Catalogs APIs across ...12.2Open Voice Network APIAPI for the Open Voice Network, providing programmatic access to open standards and interoperability framew...11.8
Minimal 5 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...8.5Global Voice Services APIInitiate ordering of phone numbers and configuration for BT Global Voice Services consumed by multinational...8.5Inmarsat GSPS APIThe GSPS (Global Satellite Phone Service) API supports Inmarsat's L-band geostationary satellite voice netw...8.2Rakuten CPaaS Confirm (OTP) APIOne-time PIN delivery and verification API for two-factor authentication and transaction confirmation, with...7.9MirrorFly Chat Platform APIToken-authenticated REST API for building in-app chat, split into User APIs and Admin APIs (users, contacts...1.5

Score breakdown

Frequency
69.3
log-scaled weighted occurrences
Breadth
6.4
spread across providers
Quality lift
42.0
mean composite of providers using it
Cohesion
21.6
strength of nearest seed neighbor

Related tags

SMS 67 co-occurrences Communications 59 co-occurrences Telephony 36 co-occurrences CPaaS 33 co-occurrences Messaging 74 co-occurrences Contact Center 36 co-occurrences Text-to-Speech 31 co-occurrences Conversational AI 40 co-occurrences

Where this tag comes from

Provider tag192
Api tag122
Openapi tag17
Openapi op tag66

Cohort brief

Auto-generated

The 232 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
232
of 233 on the roster
Mean Kin Score
34.6
+13.9 vs catalog 20.7
Mean Agent Readiness
18.5
+8.8 vs catalog 9.7
Spread
0.6–83.3
median 35.6 · σ 18.8
How the 232 split by band
Exemplar 7Strong 31Developing 56Thin 62Emerging 39Minimal 37
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 36.5 17.5 +19 232
Developer Ergonomics 34.5 17.9 +16.6 232
Access Clarity 33.7 22.3 +11.4 232
Operational Transparency 22.4 11.3 +11.1 232
Discoverability 69.2 60.4 +8.8 232
Contract Governance 11.5 6.4 +5.1 232

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) 33% 16% +17
MCP server (first-party) 12% 7% +5
Agent Skills 0% 0% 0
OAuth scopes 13% 9% +4
Security 94% 88% +6
Arazzo workflows 6% 2% +4
Governance rules 22% 13% +9

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 Salesforce 83.3
  2. 2 Amazon Pinpoint 83.1
  3. 3 Twilio 73.4
  4. 4 Zoom Phone 72.1
  5. 5 Infobip 71
  6. 6 8x8 67.1
  7. 7 Inworld AI 66.7
  8. 8 Dolby.io 65.5
  9. 9 ServiceNow 64.8
  10. 10 Spruce Health 64.8
Top by Agent Readiness
  1. 1 Zoom Phone 54.3
  2. 2 The Mobile First Company 52.9
  3. 3 Salesforce 52.2
  4. 4 Microsoft Azure 49.6
  5. 5 AgentPhone 48.9
  6. 6 Telia Company 48.1
  7. 7 Swisscom 48
  8. 8 Infobip 47.7
  9. 9 ELBO AI, INC 43.9
  10. 10 SK Telecom 43.7
This roster declares 233 members; 232 resolve to a provider in the catalog and 232 carry a score (100%). The figures above describe the scored members only.Generated from the catalog build of 25 August 2026, across 26891 providers, using the same computation served by the APIs.io cohort API. Briefs are published for rosters of 5 or more scored providers; below that a distribution is not meaningful.

Work with this as data

Every tag here is available over the APIs.io API and to AI agents over MCP.

MCP server

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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