Best Orchestration & Agent Platforms Tools for Voice AI

Multilingual phone/web agents with bring-your-own LLM/STT/TTS.

Open-source-rooted Indic voice agent platform for recruitment, sales, support.

Voice agents with regionally accurate accents for sales, support, collections.

Speech-to-speech agent-building CLI.

Open-source, self-hostable Vapi/Retell alternative with a visual workflow builder.

Expressive multilingual text-to-speech and voice cloning, plus a conversational agents platform.

Own speech models and enterprise agent platform.

Mobile-first conversational AI (voice, WhatsApp, web); owned by Jio Platforms.

CPaaS veteran (VivaConnect) with the Helo Convo no-code voice/chat agents.

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

Inbound/outbound voice agent platform for Indian businesses.

Accel and General Catalyst-backed; acquired Verloop.io to combine chat and voice.

Train agents on your data, simulate calls, deploy to real numbers; Accel-backed.

Open-source Python framework from Daily for building realtime voice and multimodal agents.

Platform for building and running phone-based AI voice agents at scale.

No-code voice/chat agent builder for calls, WhatsApp, web.

Persistent institutional-memory layer across sales and support conversations.

Grew from a human-calling marketplace into a large-scale voice AI sales platform.

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

Open-weight speech-native model that understands audio directly, with a hosted voice API.

'AI voice employees' for calls, lead qualification, CRM updates in 100+ languages.

In-house Vani TTS behind unlimited-calling plans.

Developer platform to build, test and deploy voice agents on any STT, LLM and TTS.

Phone, WhatsApp, web agents in 17+ languages with STT/LLM/TTS provider switching.

Voice agents for sales, support, ops; Hindi and Indic agent products.

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

Voice calling and WhatsApp agents with voice cloning; founded 2024.