Matrix/Features/Phone numbers & telephony
Which voice AI agent platforms have Phone numbers & telephony?
Buy numbers in-platform or connect Twilio/SIP to take and make real phone calls.
10 Yes1 Partial0 Unknown
Verified Yes: Vapi, Retell AI, Bland AI, Cartesia Agents, ElevenLabs Agents, Synthflow, OpenAI Realtime API, LiveKit Agents, Ultravox, Vaani.
| Platform | Status | What the vendor says | Source |
|---|---|---|---|
| Bland AIBland | Yes | Numbers, BYO Twilio Start plan includes an inbound number; Bring Your Own Twilio is in the API. | Source |
| Cartesia AgentsCartesia | Yes | Cartesia, Twilio, SIP Use a Cartesia number, Twilio or SIP. | Source |
| ElevenLabs AgentsElevenLabs | Yes | Twilio, SIP trunk No ElevenLabs telephony fee; native Twilio integration and SIP trunking. | Source |
| LiveKit AgentsLiveKit | Yes | Numbers, SIP 1 free number on Build, local numbers $2/mo, third-party SIP. | Source |
| OpenAI Realtime APIOpenAI | Yes | SIP Connect phone calls over SIP. | Source |
| Retell AIRetell AI | Yes | $10/mo numbers, SIP Numbers $10/month; no charge for SIP trunking or custom telephony. | Source |
| SynthflowSynthflow | Yes | Numbers, Twilio, SIP Native numbers, Twilio and SIP trunking. | Source |
| UltravoxUltravox | Yes | Twilio, Telnyx, Plivo, SIP Twilio, Telnyx, Plivo and SIP documented; SIP priced at 0.5¢/min. | Source |
| VaaniVaani | Yes | Numbers ₹600/mo Phone numbers ₹600/month. | Source |
| VapiVapi | Yes | Free numbers, Twilio, SIP Vapi numbers and SIP included; Twilio passthrough $0.008/min inbound, $0.014/min outbound. | Source |
| Deepgram Voice Agent APIDeepgram | Partial | Twilio guide No in-platform numbers; Twilio integration guide. | Source |
Checked Nov 4, 2026. Filter the matrix by this feature →
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