Best Telephony & Transport Tools for Voice AI

Cloud telephony with CRM integrations (Zoho, Salesforce); absorbed Servetel.

Cloud telephony and UC (IVR, dialers, CPaaS) with AI voice agents added.

Cloud telephony built around missed-call marketing and lead recovery.

Cloud calling infrastructure.

Voice API pioneer; CPaaS plus contact-center (Ameyo) and conversational AI (Cogno AI).

One of India's largest cloud comms providers: virtual numbers, IVR, call center.

Open-source WebRTC infrastructure and Agents framework for realtime voice and video AI.

SME cloud telephony: IVR, call tracking, WhatsApp Business.

Global CPaaS for voice, SMS, WhatsApp APIs in 190+ countries.

UCaaS/CPaaS (SMS, WhatsApp, voice) with a GenAI voicebot.

Cloud communications with AI call routing, analytics, hosted PBX.

Voice APIs, SIP trunking and phone numbers on a private global network, plus a platform for building voice AI agents.

Programmable voice, phone numbers and SIP trunking used across most voice agent stacks.

Open-source telephony and voice-agent infra (LiveKit/Pipecat based) with dedicated numbers.

Live video and WebRTC infrastructure, commonly used alongside voice stacks.

Cloud calling infrastructure.

Bulk voice calls, IVR, missed-call services for SMB alerts.

AI-first communications platform combining carrier-grade telephony with a voice AI engine, with REST APIs and webhooks for voice agents.