Open source voice AI platform. Self-hosted alternative to Vapi and Retell. On Prem, BYOK across Speech to Speech or LLM/STT/TTS, with a visual workflow builder, MCP native and telephony support.

Conversational voice AI agents

Rapida is an open-source, end-to-end voice AI orchestration platform for building real-time conversational voice agents with audio streaming, STT, TTS, VAD, multi-channel integration, agent state management, and observability.

Open-source, self-hostable platform for building and operating AI phone agents.

Build realtime voice and video agents with Google's new Gemini 2.0 (API is free for now)

Set of 📝 with 🔗 to help those building Voice AI agents 🎙️🤖

Sayna is a unified Voice Layer for AI Agents with a seemless integration to an existing agentic frameworks

Official one-stop shop for AI Agents and developers building with Telnyx.

A New End-to-end Framework for Evaluating Voice Agents

DialogLab is an authoring tool for configuring and running Human-AI multi-party conversations.

A self-improving loop for voice AI agents. Uses karpathy's autoresearch as foundation.

Addressee detection for voice agents: device-directed speech detection that runs before STT, so background speech, side conversations, and the agent's own TTS echo never trigger it. No wake word, model-agnostic, drop-in for LiveKit, Pipecat, ElevenLabs, Twilio, and OpenAI. The layer your VAD and turn detection are missing.

The ElevenLabs Agents SDK for TypeScript.

A programmable voice platform: SIP and WebRTC call control, multi-party mixing, recording, TTS/STT, and pluggable AI agents (ElevenLabs, VAPI, Pipecat, Deepgram) — all driven through a REST API, webhooks, and a WebSocket event stream

Open-Source CPAAS for Contact Center Teams.

Voice Prompts, GPT-4o prompts, Voice Agent Prompts, ChatGPT Prompts, HumeAI Prompts

Self-hosted native-Rust runtime for real-time voice agents. Own the stack: one binary in your own VPC or air-gapped, no hosted control plane. pipecat-compatible pipeline, in-process SIP/RTP, single-process call density. Apache-2.0.

Reusable AI coding agent skills for building voice AI with LiveKit

The runtime reliability layer for AI agents.

Vapi MCP Server