AI Voice Agents

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Twilio

Cloud communications APIs for voice and SMS

Twilio is a cloud communications platform with APIs for voice calls, SMS and SIP. Many voice agent stacks use it for phone numbers and call routing, including its ConversationRelay product.

telephonysipsmsapi

vs Deepgram vs ElevenLabs vs LiveKit Agents vs OpenAI Whisper vs Vapi vs Amazon Connect vs Asterisk vs Bandwidth Twilio alternatives

More in Telephony

Amazon Connect

AWS cloud contact center

Paidtelephonycontact-center

Asterisk

Open-source PBX and telephony toolkit

Open sourcetelephonypbx

Bandwidth

Voice APIs on a US carrier network

Paidtelephonycarrier

FreeSWITCH

Open-source telephony platform and media server

Open sourcetelephonysip

Jambonz

Open-source voice gateway for voice apps and agents

Open sourcetelephonysip

Plivo

Voice and SMS APIs with SIP trunking

Paidtelephonysip