Beeper
Automattic
Single inbox that bridges WhatsApp, Telegram, Signal, Slack and other networks into one desktop chat list.
No known warnings · checked 23 Oct 2026
Telegram FZ-LLC
FREEGPL-3.0-only
Native desktop client for Telegram, with cloud-stored chat history that appears on every signed-in device.
Links go to the official site. SoftHarbor hosts no downloads.
Automattic
Single inbox that bridges WhatsApp, Telegram, Signal, Slack and other networks into one desktop chat list.
No known warnings · checked 23 Oct 2026
Betterbird contributors
Thunderbird fork that ships extra fixes and features which have not been merged into the upstream release.
No known warnings · checked 23 Oct 2026
The Claws Mail team
Lightweight GTK email client that stores mail as plain files and adds features through a large plugin set.
No known warnings · checked 23 Oct 2026
Delta Chat contributors
Chat app that sends messages over ordinary email accounts, encrypting them end to end where both sides support it.
No known warnings · checked 23 Oct 2026