GigaMail: an open-source desktop mail client built with Claude Code
A developer built GigaMail mostly with Claude Code and Cowork, and has taken the free mail client from version 0.1.0 to 0.6.7 in two months.
Credits
- Reddit poster Soft-Lie-434 Source ↗
Earliest dated source:
The full story
GigaMail is a free, open-source desktop email client for Mac, Windows and Linux, meant to let an AI agent work safely on real mail. Its maker built it almost entirely with Claude Code and Cowork, using Opus 5 to 5.5 and Fable for the hardest parts.
In two months it went from a buggy MCP server to desktop apps at version 0.6.7, with better security and attachment masking. A security release, a mobile app and dedicated addresses for agents are planned.
The maker says teams at estate agencies, law firms, nonprofits and an Italian university use it.
How it was done
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Sources
From a short post by the maker, so the details are as they tell them.
- Reddit: I built GigaMail with Claude Code, posted the first release here months ago and now we are at 0.6.7Reddit poster: Soft-Lie-434Posted
The maker's update in r/ClaudeCode.
- Reddit: I posted GigaMail's first release (0.1.0 the naive release) here 2 months ago and now we aReddit poster: Soft-Lie-434Posted
The same update in r/ClaudeAI.