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.
Patter is an open-source SDK that lets developers build voice AI agents connected to telephone networks, handling the agent loop, language model, speech recognition, speech synthesis, real-time voice, audio processing, and carrier connection. Developers use it from Python or TypeScript and can choose providers for each part of the call. The catalogue instruction relates to operating and building with Patter.
Latest release v0.7.0 — v0.7.0 — Inworld integration, security hardening, pipeline barge-in fix · 30 Jun 2026
These files are PatterAI/Patter's own configuration. They tell Codex and OpenCode how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.
AGENTS.md A 855 tok