Download
Get Matters.
Open source, for macOS. Your mail is stored on your computer, and you choose where the agent runs.
Releases
Every version and its files are on GitHub. Until the first one, you build it from source.
Matters for macOS
Build from source
You need macOS and Bun 1.4.
$ git clone https://github.com/milolabs/matters-app
$ cd matters-app
$ bun install
$ bun run dev:desktop:demo # a made-up mailbox, no account needed
$ bun run dev:desktop # your own accountsPlatforms
| System | State | |
|---|---|---|
| macOS, Apple silicon | from source | Developed and tested here. |
| Linux | not yet | Needs someone to build and test it. |
| Windows | not yet | Needs someone to build and test it. |
Mail accounts
| Provider | State | |
|---|---|---|
| Gmail, iCloud, Yahoo, Fastmail | works | With an app password. |
| Any IMAP and SMTP server | works | With a password. |
| Microsoft 365, Outlook.com | not yet | They need browser sign-in, which is not built. |
Agents
The agent is optional. Matters works as a mail client without it.
| Runs on | State | |
|---|---|---|
| Claude Code | works | Your Claude plan, through the program on your computer. The mail the agent reads goes to Anthropic. |
| Codex | works | Your ChatGPT plan. The mail the agent reads goes to OpenAI. |
| Ollama | works | A model on your computer. Mail never leaves it. |
| API keys | planned |
All releases
Every version, with its notes and files, is on GitHub Releases. Report a security problem as the security policy says.