Email and newsletters
Mimestream alternatives
2 open-source projects that already do this job. Free to use - not free to run, which is what the numbers on the right are for.
The projects
Oxygem/Kanmail★1,364 GitHub starslicence unclearA desktop email client that organizes your inbox as a kanban board.Open on GitHub ↗Foundry376/Mailspring★17,726 GitHub starsGPL-3.0 licenceCross-platform, native-feeling desktop email client with Gmail support and modern mail features.Open on GitHub ↗
What you give up either way
- macOS-level polish and deep system integrations (continuity camera, menu extras, gestures)
- Built-in tracker-blocking implementation and privacy claims
- Templates, mentions, and other advanced editor niceties
- Subscription/licensing portal, billing, and family-sharing infrastructure
- Official app updates, notarization management, and support
An open-source project doing the core job proves a replacement is possible. It does not prove it matches Mimestream, and it does not prove anyone has run it for a month. How we decide.