Self-hosted voice AI agents with a Vapi-compatible API. AI phone agents on Twilio, Telnyx, Plivo, Vonage or SIP, with your keys or 100% local and free (Whisper, Ollama, Kokoro). No per-minute platform fee. npx openring
Open-source voice-AI SDK. The Vapi/Retell alternative for builders who want to own the stack. Give your AI agent a phone number in 4 lines — Python and TypeScript, MIT licensed, Twilio, Telnyx, and Plivo.
AI Phone Agent: A starter kit to build AI agents that answer real phone calls and talk to customers in real time. Amazon Connect, OpenAI SIP, and the OpenAI Realtime API. Dial +1 844-593-8442 to try the demo.
Let your AI agents call your phone over VoIP, and call them back. Your phone rings like a real call, even locked; a voice AI talks it through and returns the transcript. Self-hosted, open source, no phone numbers or Twilio.
Open-source AI phone API for voice agents. Give Claude, Cursor, OpenClaw, or any LLM a real phone number — outbound/inbound calls, SMS, transcripts, MCP, DTMF/IVR. FastAPI + SignalWire + Deepgram. Self-hostable alternative to Twilio, Vapi, and Retell.
Self-hosted API-first AI call center: AI talks, code controls the call. AI agents answer every call; humans take over without dropping it. Runs on FreeSWITCH with your SIP trunk and realtime model (OpenAI, Grok, Qwen, Doubao, or any compatible gateway).
The Open Source Voice Agent Platform - Build voice agents by connecting nodes in a canvas, deploy them to handle inbound and outbound phone calls, and monitor every call, latency and cost.
