Polychat AI Platform

Polychat is a multi-model AI assistant platform for personal chat and collaborative project work, with web, iOS and desktop clients.

Try the hosted version at polychat.app, or read Building my own AI assistant for the story behind the project.

Set up or adapt Polychat

Use the repo-local polychat-setup skill for setup, configuration, architecture and release guidance.

For example, ask your agent:

Use polychat-setup to help me run a white-labelled Polychat instance. Start with the web app and API, explain each decision, and make the changes after I confirm them.

Product

Polychat has two primary modes:

• Chat is a personal, conversation-first space for models, agents, connected tools, memories, and installed recipes.
• Work organises collaborative work into workspaces and projects with shared instructions, conversations, sources, outputs, and selected capabilities.

The platform includes:

• Multi-provider chat with streaming, multimodal messages, model routing, sharing, feedback, and conversation compaction.
• Custom agents, MCP servers, delegation, approval-aware tools, and reusable workflows.
• Retrieval, memories, web research, generated media, realtime audio, and interactive artefacts.
• Sources as a media library: upload and transcribe recordings and video, generate images and video across models, and turn sources into two-host podcast episodes with private RSS feeds, on demand or on a schedule.
• Project-scoped experiences for longer workflows such as notes, articles and music patterns.
• A governed model platform in Work: datasets, fine-tuning, deployments behind aliases, evals and audit on your own provider accounts.
• Isolated coding runs against GitHub repositories through Cloudflare Sandboxes.
• Authentication, guardrails, subscriptions, rate limiting, audit history, and observability.

Repository

• apps/app — React Router web application and PWA.
• apps/api — public Hono API Worker and platform control plane.
• apps/sandbox-worker — isolated coding workspaces and hosted browser computers.
• apps/agent-worker — host for agent harnesses such as Pi, OpenCode and container CLIs.
• apps/desktop — Tauri desktop client.
• apps/mobile/ios — native iOS client under active development.
• packages/* — shared schemas, utilities, runtime libraries, and reusable React components published under the @ngriffin_uk/polychat-* scope.

Resources

Examples

• Generation of a new React component
• Code generation and execution
• Web search integration
• Perplexity Deep Research
• Interactive inline artifacts
• Document generation and collaboration through artifacts
• Combined artifact previews
• Markdown formatting
• Search Grounding
• Multi-model responses
• Saved memories (RAG)
• Retrieved memories (RAG)
• Multi Step Tool Calls
• Multi Step MCP Calls
• Agent to agent delegation

References

• Live API reference
• Polychat setup skill
• Hosted Polychat
• Automated model routing
• Multi-model image and video generation
• Cloud AI coding environment
• Contributing
• Licence