arcan
the messenger with
nothing to leak
arcan is a local-first, end-to-end encrypted messenger. keys stay on your device, history stays yours, and everything works offline — no phone number, no analytics, nothing to hand over.
free · open source·linux, windows, macos & ios coming soon
// why arcan
end-to-end encrypted
every message is sealed on your device and opened on theirs — no one in between can read it. keys never touch a server, so there is nothing we can recover, decrypt, or hand over. your data is accessible to you, and only you.
01
open source & self-hostable
every line is public — read it, audit it, or build it yourself. and if you'd rather run arcan on your own trusted server, one binary is all it takes: arcan ships to your server, not ours. github ↗
02
local-first
built on jazz ↗, arcan keeps everything on your device first. read, write, and organize while offline — the moment you're back online, every change syncs, still sealed.
03
9:41●●●
mechats
AK
ada · keyring
take a look when you can
9:252
RS
retrieval-squad
rana: 40ms p99 now
TUE5
JM
jun mori
sent the schema diff
TUE
TZ
theo z.
sow-042.md
MON
EL
eli · device-2
you: pulled, thanks
MON
chats
contacts
arcan on android · v0.4
// download
available now
android
direct download, no store account needed. the apk is signed and reproducible — checksums are published beside every release.
browser
nothing to install — keys stay in your tab.
linux
windows
macos
ios
install on android
- download
arcan-0.4.2.apkwith the button above. - allow the install when android asks about this source — the apk is signed and reproducible.
- open arcan and create your account.
verify the build
$ sha256sum arcan-0.4.2.apk
3f9a…c41e arcan-0.4.2.apk
// compare against the published release checksum