established · 0.1 market domain

Telephony

Score 26.6 / 100 53 providers +14 via APIs 32 APIs Search apis.io →
Business capabilities this tag reaches
Customer Service Management 1

Providers using this tag (53)

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

Strong 14 Solid coverage with minor gaps
VeraDialAI ReceptionistBusiness PhoneVoice AI2 APIs66.1SignalWireCompanyCommunicationsCPaaSVoice4 APIs65.4BandwidthCommunicationsCPaaSVoiceMessaging3 APIs62.7The Mobile First CompanyCompanyCommunicationsVoice1 API62.0DialNexaVoice AIAI AgentsLead Qualification2 APIs61.2Numbers OnlinePhone IntelligenceCaller IDCNAMReverse Phone Lookup2 APIs60.4GenesysCompanySoftwareContact CenterCustomer Experience1 API60.3SynthflowVoiceVoice AgentsNo-Code1 API60.0GridspaceCompanyVoice AIConversational AIVoice Agents1 API59.3SyllableCompanyArtificial IntelligenceAI AgentsVoice1 API58.8WeaveCompanyCommunicationsMessagingPayments1 API58.6FixieCompanyVoice AIConversational AIReal-Time1 API57.9KixieCompanySales EngagementVoice3 APIs57.6CloudTalkCompanyCommunicationsVoiceVoIP1 API56.7
Developing 21 Usable, with meaningful gaps to close
Neutrino APIData ValidationData ToolsCommunications2 APIs53.7VOYGRCompanyLocation IntelligencePOI DataData Enrichment1 API53.4InvocaCompanyArtificial IntelligenceCall TrackingConversation Intelligence1 API53.0AvayaCommunicationsContact CenterCollaborationArtificial Intelligence80 APIs52.5QuoCompanyCommunicationsMessagingSMS1 API52.5VoiceGenieCompanyVoice AIConversational AISales Automation1 API52.4Bright PatternCompanyContact CenterCCaaSCustomer Experience11 APIs52.2PhonicCompanyArtificial IntelligenceVoice AIConversational AI1 API51.7ThoughtlyVoice AIChat AIConversational AIAI Agents1 API51.6CallRailCall TrackingConversation IntelligenceMarketing AttributionLead Tracking1 API50.7SpekoVoiceVoice AISpeech-to-TextText-to-Speech1 API50.5NetomiCompanyArtificial IntelligenceAI AgentsCustomer Experience1 API50.0BolnaCompanyArtificial IntelligenceVoice AIConversational AI1 API49.9OrumCompanyArtificial IntelligenceSalesSales Engagement49.4Phone ComCompanyVoIPBusiness Phone1 API47.0NextivaCompanyCommunicationsVoiceContact Center5 APIs46.4HappyrobotAI AgentsAgent OrchestrationVoice AIConversational AI2 APIs46.1PhonelyArtificial IntelligenceVoice AIVoice AgentsConversational AI2 APIs45.5Cisco Voice PortalContact CenterIVRVoice4 APIs42.3AgentPhoneCompanyPhone NumbersSMS1 API42.2Sarj AI Developer APIVoice AIVoice AgentsConversational AIArabic AI4 APIs41.3
Thin 9 Limited public surface area
Bitrix24CRMCollaborationProject ManagementTask1 API38.7WazoVoIPUnified CommunicationsUCaaS25 APIs38.4BurnerCompanyPhone NumbersSMSMMS1 API37.5RainbowCommunicationsCPaaSChatVoice3 APIs36.8JustCallVoiceSMSCloud PhoneContact Center1 API34.2VocodeVoice AIVoice AgentsConversational AI1 API34.0TenfoldCompanyCTIContact Center1 API28.7NewVoiceMediaCompanyCloudContact CenterCCaaS1 API28.0TalkdeskContact CenterCCaaSVoiceWebhook1 API27.2
Emerging 5 Early or largely undocumented
Samora AICompanyVoice AgentsConversational AIVoice AI1 API26.1ParloaAgentsArtificial IntelligenceCall CenterCCaaS2 APIs17.4callagent.proAI AgentsVoicePhone Agents1 API17.0Callab AIVoice AIConversational AIContact Center1 API15.9BesideCompanySoftwareCommunicationsVoice15.5
Minimal 4 Almost no public developer surface
DialupCompanyVoiceSocialCommunications8.8ChimelabsCompanyArtificial IntelligenceVoiceReceptionist6.8VonBoxCompanyCommunicationsMessaging4.4Brooktrout TechnologyCompanyFaxVoice0.0

APIs with this tag (31)

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 7 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...91.0Leadping Telephony APIProvides shared authentication and bootstrap data for Leadping telephony clients. Use this endpoint to obta...74.9Service Cloud CTI APIOpen CTI — the JavaScript API that connects a telephony system's softphone to the Service Cloud console, pl...71.9Service Cloud Voice Telephony Integration APIREST API for integrating telephony systems with Service Cloud Voice, enabling programmatic management of vo...71.9SendPulse Telephony APIThe Telephony API from SendPulse — 4 operation(s) for telephony.69.5ServiceNow Openframe APIThe ServiceNow Openframe API provides REST endpoints that enable Contact Center as a Service (CCaaS) provid...67.5ServiceNow Voice Interaction Resource APIThe ServiceNow Voice Interaction Resource API provides REST endpoints for integrating telephony and voice s...67.5
Strong 5 Solid coverage with minor gaps
Apollo.io Calls APIPhone-call records — log, search and update dialer activity. 3 operation(s) from the published Apollo OpenAPI.65.1Webex Telephony APIThe Telephony API from Webex — 1 operation(s) for telephony.63.8Genesys Telephony APITelephony providers and configuration60.3Swisscom 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...59.1
Developing 6 Usable, with meaningful gaps to close
Neutrino API Telephony APIAPIs for live telephony53.7Voygr Calls APIProgrammatic outbound phone calls executed by an AI voice agent. Submit a task either as a plain-language b...53.4Speko Telephony APIThe Telephony API from Speko — 22 operation(s) for telephony.50.5Bolna Voice AI APIREST API for building and operating conversational voice AI agents — create and manage agents, place outbou...49.9phone-com-apiPhone.com v4 ("Phoenix") JSON REST API for managing accounts, extensions, devices, phone numbers, call rout...47.0Phonely Agents APIManage Phonely voice agents programmatically. Retrieve a single agent or list all agents for a user, and up...45.5
Thin 11 Limited public surface area
Bitrix24 REST APITenant-scoped REST API for managing CRM entities, deals, leads, tasks, calendars, telephony, disk files, us...38.7Bitrix24 Telephony APIThe Telephony API from Bitrix24 — 30 operation(s) for telephony.38.7Wazo Phone Provisioning API (wazo-provd)Phone auto-provisioning service. Manages device plugins, configuration templates, device registrations, DHC...38.4Wazo Websocket Event Stream (wazo-websocketd)WebSocket gateway onto the Wazo internal event bus. An authenticated client subscribes to named platform ev...38.4iX 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...37.5Transports (WebRTC/WebSocket)Realtime media transport layer of the framework. Bidirectional audio, video, and data flow over Daily WebRT...36.0JustCall REST APIREST API for placing calls, sending SMS and MMS messages, managing contacts, phone numbers, users, and call...34.2LiveKit SIP (Telephony) APISIP integration for inbound and outbound PSTN calls bridged into LiveKit rooms.31.5Webex Calling APICloud calling capabilities including call control, dial plans, voicemail, voice portals, queues, hunt group...30.9DealerSocket CTI & Activity Logging APIInbound call-tracking and activity-logging surface. CTI Direct Post logs inbound and outbound call informat...29.3
Emerging 2 Early or largely undocumented
SystmOne Telephony APITPP's Telephony API for integrating telephony systems with SystmOne, supporting computer-telephony workflow...23.3Callab AI APICallab AI's REST API, documented at docs.callab.ai/api-reference, is organized around REST principles with ...15.9

Companies reaching this through an API (14)

These companies publish an API, specification or operation carrying “Telephony” 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.

Apollo.io Cisco Collaboration Hybrid Solutions Concentrix DealerSocket Leadping LiveKit Pipecat Salesforce Salesforce Service Cloud APIs SendPulse ServiceNow Swisscom TPP (SystmOne) Webex

Score breakdown

Frequency
53.0
log-scaled weighted occurrences
Breadth
1.4
spread across providers
Quality lift
53.1
mean composite of providers using it
Cohesion
16.1
strength of nearest seed neighbor

Related tags

Contact Center 27 co-occurrences Voice 40 co-occurrences Voice Agents 12 co-occurrences Phone Numbers 13 co-occurrences Call Center 8 co-occurrences CCaaS 8 co-occurrences Voice AI 17 co-occurrences

Where this tag comes from

Provider tag53
Api tag32
Openapi tag4
Openapi op tag11

Cohort brief

Auto-generated

The 52 providers in the APIs.io catalog tagged Telephony, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
52
all scored
Mean Kin Score
44.2
+21.3 vs catalog 22.9
Mean Agent Readiness
31.2
+19.3 vs catalog 11.9
Spread
4.4–66.1
median 50 · σ 16.1
How the 52 split by band
Exemplar 0Strong 14Developing 21Thin 9Emerging 5Minimal 3
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 45.3 17.6 +27.7 52
Developer Ergonomics 47.1 23.2 +23.9 52
Access Clarity 46.9 26.5 +20.4 52
Operational Transparency 31.8 13.7 +18.1 52
Discoverability 69.9 58.1 +11.8 52
Contract Governance 12.2 6.3 +5.9 52

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% 14% +19
MCP server (first-party) 31% 12% +19
Agent Skills 0% 0% 0
OAuth scopes 23% 11% +12
Security 98% 98% 0
Arazzo workflows 2% 2% 0
Governance rules 13% 14% -1

mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.

Top by Kin Score
  1. 1 VeraDial 66.1
  2. 2 SignalWire 65.4
  3. 3 Bandwidth 62.7
  4. 4 The Mobile First Company 62
  5. 5 DialNexa 61.2
  6. 6 Numbers Online 60.4
  7. 7 Genesys 60.3
  8. 8 Synthflow 60
  9. 9 Gridspace 59.3
  10. 10 Syllable 58.8
Top by Agent Readiness
  1. 1 Sarj AI Developer API 67.3
  2. 2 DialNexa 61.8
  3. 3 Speko 60.5
  4. 4 Genesys 57.4
  5. 5 Phonic 56.9
  6. 6 The Mobile First Company 55.4
  7. 7 Synthflow 54
  8. 8 Bolna 53.6
  9. 9 Numbers Online 49.7
  10. 10 Thoughtly 49.7
All 53 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.

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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

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All tags 
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As a scored cohort 
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The distribution (Pro) 
curl "https://apis.io/api/v1/cohorts/tag/telephony/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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