Sickle

Sickle

Every mailbox you own, in one Mac app and your AI agent

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Sickle is a native Mac mail client for every account you own: Gmail, Outlook, iCloud, Fastmail, Yahoo and any IMAP server, in one window, each in its own colour, with keyboard navigation and an email cleaner. It also runs a remote MCP server, so Claude, Cursor, Codex or any MCP client can search, tidy and draft across all of those mailboxes at once.

Sickle makers

Here are the founders, developers, designers and product people who worked on Sickle