established · -1.9 market domain

Telephony

Score 24.7 / 100 51 providers +14 via APIs 31 APIs Search apis.io →
Business capabilities this tag reaches
Customer Service Management 1

Providers using this tag (51)

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

Exemplar 1 Complete, well-documented, and agent-ready
SignalWireCompanyCommunicationsCPaaSVoice2 APIs66.9
Strong 16 Solid coverage with minor gaps
SynthflowVoiceVoice AgentsNo-Code1 API58.1SyllableCompanyArtificial IntelligenceAI AgentsVoice1 API65.1GenesysCompanySoftwareContact CenterCustomer Experience1 API62.4The Mobile First CompanyCompanyCommunicationsVoice1 API62.0BandwidthCommunicationsCPaaSVoiceMessaging3 APIs61.0DialNexaVoice AIAI AgentsLead Qualification2 APIs60.8Numbers OnlinePhone IntelligenceCaller IDCNAMReverse Phone Lookup2 APIs60.4SonetelCompanyPhone NumbersVoIP20 APIs58.6PhonicCompanyArtificial IntelligenceVoice AIConversational AI1 API57.7FixieCompanyVoice AIConversational AIReal-Time1 API57.6KixieCompanySales EngagementVoice3 APIs57.6SaperlyVoiceSMSPhone Numbers2 APIs57.0VeraDialAI ReceptionistBusiness PhoneVoice AI6 APIs56.7SpekoVoiceVoice AISpeech-to-TextText-to-Speech1 API56.5Phone ComCompanyVoIPBusiness Phone2 APIs55.9BolnaCompanyArtificial IntelligenceVoice AIConversational AI1 API55.8
Developing 16 Usable, with meaningful gaps to close
Neutrino APIData ValidationData ToolsCommunications2 APIs54.1NetomiCompanyArtificial IntelligenceAI AgentsCustomer Experience1 API50.2VOYGRCompanyLocation IntelligencePOIData Enrichment1 API53.5InvocaCompanyArtificial IntelligenceCall TrackingConversation Intelligence1 API53.1QuoCompanyCommunicationsMessagingSMS1 API53.0AvayaCommunicationsContact CenterCollaborationArtificial Intelligence40 APIs52.5Bright PatternCompanyContact CenterCCaaSCustomer Experience11 APIs52.2VoiceGenieCompanyVoice AIConversational AISales Automation1 API52.1CallRailCall TrackingConversation IntelligenceMarketing AttributionLead Tracking1 API50.7WeaveCompanyCommunicationsMessagingPayments1 API50.3OrumCompanyArtificial IntelligenceSalesSales Engagement49.4NextivaCompanyCommunicationsVoiceContact Center5 APIs46.3HappyrobotAI AgentsAgent OrchestrationVoice AIConversational AI2 APIs46.2ThoughtlyVoice AIChat AIConversational AIAI Agents1 API44.1Cisco Voice PortalContact CenterIVRVoice4 APIs42.2Sarj AI Developer APIVoice AIVoice AgentsConversational AIArabic AI4 APIs41.2
Thin 9 Limited public surface area
RainbowCommunicationsCPaaSChatVoice3 APIs35.2TenfoldCompanyCTIContact Center1 API29.3WazoVoIPUnified CommunicationsUCaaS25 APIs38.9PhonelyArtificial IntelligenceVoice AIVoice AgentsConversational AI2 APIs38.7BurnerCompanyPhone NumbersSMSMMS1 API37.5JustCallVoiceSMSCloud PhoneContact Center1 API34.0NewVoiceMediaCompanyCloudContact CenterCCaaS1 API28.6TalkdeskContact CenterCCaaSVoiceWebhook1 API28.6Samora AICompanyVoice AgentsConversational AIVoice AI1 API26.2
Emerging 6 Early or largely undocumented
Callab AIVoice AIConversational AIContact Center1 API15.6VocodeVoice AIVoice AgentsConversational AI1 API25.3BesideCompanySoftwareCommunicationsVoice19.8callagent.proAI AgentsVoicePhone Agents1 API17.0ChimelabsCompanyArtificial IntelligenceVoiceReceptionist13.2ParloaAgentsArtificial IntelligenceCall CenterCCaaS2 APIs11.0
Minimal 3 Almost no public developer surface
Brooktrout TechnologyCompanyFaxVoice0.0DialupCompanyVoiceSocialCommunications9.3VonBoxCompanyCommunicationsMessaging4.5

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 5 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...88.8Leadping Telephony APIProvides shared authentication and bootstrap data for Leadping telephony clients. Use this endpoint to obta...75.4Service Cloud CTI APIOpen CTI — the JavaScript API that connects a telephony system's softphone to the Service Cloud console, pl...70.4Service Cloud Voice Telephony Integration APIREST API for integrating telephony systems with Service Cloud Voice, enabling programmatic management of vo...70.4SendPulse Telephony APIThe Telephony API from SendPulse — 4 operation(s) for telephony.68.4
Strong 9 Solid coverage with minor gaps
ServiceNow Openframe APIThe ServiceNow Openframe API provides REST endpoints that enable Contact Center as a Service (CCaaS) provid...66.0ServiceNow Voice Interaction Resource APIThe ServiceNow Voice Interaction Resource API provides REST endpoints for integrating telephony and voice s...66.0Webex Telephony APIThe Telephony API from Webex — 1 operation(s) for telephony.64.1Apollo.io Calls APIPhone-call records — log, search and update dialer activity. 3 operation(s) from the published Apollo OpenAPI.63.6Genesys Telephony APITelephony providers and configuration62.4Swisscom Voice Mail APILegacy Voice API for listing and retrieving recent voicemail messages for a Swisscom MSISDN, secured by OAu...59.0Swisscom Voice VoIP APILegacy Voice API cluster for controlling a Swisscom VoIP subscriber — placing and listing calls, managing c...59.0Speko Telephony APIThe Telephony API from Speko — 22 operation(s) for telephony.56.5Bolna Voice AI APIREST API for building and operating conversational voice AI agents — create and manage agents, place outbou...55.8
Developing 4 Usable, with meaningful gaps to close
Neutrino API Telephony APIAPIs for live telephony54.1Voygr Calls APIProgrammatic outbound phone calls executed by an AI voice agent. Submit a task either as a plain-language b...53.5Bitrix24 REST APITenant-scoped REST API for managing CRM entities, deals, leads, tasks, calendars, telephony, disk files, us...40.3Bitrix24 Telephony APIThe Telephony API from Bitrix24 — 30 operation(s) for telephony.40.3
Thin 10 Limited public surface area
Wazo Phone Provisioning API (wazo-provd)Phone auto-provisioning service. Manages device plugins, configuration templates, device registrations, DHC...38.9Wazo Websocket Event Stream (wazo-websocketd)WebSocket gateway onto the Wazo internal event bus. An authenticated client subscribes to named platform ev...38.9Phonely Agents APIManage Phonely voice agents programmatically. Retrieve a single agent or list all agents for a user, and up...38.7Burner APIOAuth 2.0 REST API for programmatic access to Burner line management, messaging (SMS/MMS) and configuration...37.5iX Hello Customer v2 Outbound Calling APIPlaces outbound PSTN and SIP voice calls programmatically and runs an authored iX Hello flow on the call. T...37.5JustCall REST APIREST API for placing calls, sending SMS and MMS messages, managing contacts, phone numbers, users, and call...34.0LiveKit SIP (Telephony) APISIP integration for inbound and outbound PSTN calls bridged into LiveKit rooms.31.5DealerSocket CTI & Activity Logging APIInbound call-tracking and activity-logging surface. CTI Direct Post logs inbound and outbound call informat...29.5Webex Calling APICloud calling capabilities including call control, dial plans, voicemail, voice portals, queues, hunt group...29.4Transports (WebRTC/WebSocket)Realtime media transport layer of the framework. Bidirectional audio, video, and data flow over Daily WebRT...27.3
Emerging 3 Early or largely undocumented
SystmOne Telephony APITPP's Telephony API for integrating telephony systems with SystmOne, supporting computer-telephony workflow...23.3callagent.pro Agent APIREST API for everything the callagent.pro dashboard does: agents, test-chat and test-call, numbers, SIP acc...17.0Callab AI APICallab AI's REST API, documented at docs.callab.ai/api-reference, is organized around REST principles with ...15.6

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
52.3
log-scaled weighted occurrences
Breadth
1.1
spread across providers
Quality lift
45.6
mean composite of providers using it
Cohesion
15.0
strength of nearest seed neighbor

Related tags

Phone Numbers 16 co-occurrences Contact Center 24 co-occurrences Voice 39 co-occurrences Voice Agents 10 co-occurrences SIP 8 co-occurrences Voice AI 16 co-occurrences CCaaS 7 co-occurrences

Where this tag comes from

Provider tag55
Api tag31
Openapi tag4
Openapi op tag11

Cohort brief

Auto-generated

The 50 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
50
of 51 in the catalog
Mean Kin Score
44.3
+22.1 vs catalog 22.2
Mean Agent Readiness
31.9
+19.9 vs catalog 12
Spread
4.5–66.9
median 50.5 · σ 16.4
How the 50 split by band
Exemplar 1Strong 16Developing 16Thin 9Emerging 6Minimal 2
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 45.2 17.2 +28 50
Access Clarity 48.1 23.9 +24.2 50
Developer Ergonomics 47.2 23.2 +24 50
Operational Transparency 30.6 13 +17.6 50
Discoverability 70.8 57.9 +12.9 50
Contract Governance 13.4 6.5 +6.9 50

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) 36% 13% +23
MCP server (first-party) 36% 12% +24
Agent Skills 0% 0% 0
OAuth scopes 26% 11% +15
Security 98% 98% 0
Arazzo workflows 0% 2% -2
Governance rules 20% 16% +4

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 SignalWire 66.9
  2. 2 Syllable 65.1
  3. 3 Genesys 62.4
  4. 4 The Mobile First Company 62
  5. 5 Bandwidth 61
  6. 6 DialNexa 60.8
  7. 7 Numbers Online 60.4
  8. 8 Sonetel 58.6
  9. 9 Synthflow 58.1
  10. 10 Phonic 57.7
Top by Agent Readiness
  1. 1 Sarj AI Developer API 65.6
  2. 2 Speko 61
  3. 3 DialNexa 60.5
  4. 4 Phonic 57.9
  5. 5 Saperly 55.8
  6. 6 Synthflow 54.9
  7. 7 The Mobile First Company 54.5
  8. 8 Genesys 54.3
  9. 9 Bolna 53.6
  10. 10 Numbers Online 49
All 51 members of this roster resolve to a provider in the catalog; 50 carry a score (98%). The figures above describe the scored members only.
Coverage caveat. 37 of 50 scored members had under half their catalog-attributable points satisfied at all (catalog_earned / catalog_max < 0.5). They are INCLUDED in the mean above. A large share here means the cohort mean is partly a measurement of how far our enrichment reached, not only of how these providers publish.Generated from the catalog build of 24 October 2026, across 31984 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

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MCP server

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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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This tag 
curl "https://apis.io/api/v1/tags/telephony"
All tags 
curl "https://apis.io/api/v1/tags?limit=25"
As a scored cohort 
curl "https://apis.io/api/v1/cohorts/tag/telephony"
The distribution (Pro) 
curl "https://apis.io/api/v1/cohorts/tag/telephony/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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