One chat. Many voices.
Polyphon is a free, open source desktop app for orchestrating conversations between multiple AI models simultaneously. You send a message — every voice in the session responds, reads each other's replies, and builds on what came before.
A critic and a builder. A cloud model and a local one. Running together, in the same conversation.
| Type | Providers |
|---|---|
| API | Anthropic Claude · OpenAI GPT · Google Gemini |
| CLI | Claude Code · Codex · GitHub Copilot |
| Local / custom | Ollama · LM Studio · any OpenAI-compatible endpoint |
Your sessions and compositions live on your machine, encrypted at rest. API keys are read from your shell environment and never leave the main process. There is no backend. There is no usage cap from us — you pay your API providers directly.
These aren't marketing claims. The source is here.
- Download Polyphon — macOS, free
- Documentation — installation, providers, sessions
- Roadmap — what's shipped and what's coming
- Releases — changelog and release notes
- Open an issue — bug reports and feature requests
- Join a discussion — questions, ideas, show and tell
- GitHub Sponsors — support development directly
Apache 2.0 · polyphon.ai · @PolyphonAI
