Private messaging that keeps working.
Chat with the people you care about — online, nearby, or completely off-grid. No phone-number signup. No mandatory server your messages must cross.
Unsigned test release. Desktop builds are unsigned, Android uses a test/debug certificate, and iOS is Simulator-only. Not audited or production-signed — the limits are documented.
No internet needed
No phone number
Your identity belongs to you.
No mandatory central server
Routes and operators are replaceable.
Open to everyone
The code is public and free.
Made for people, not protocols
It feels like messaging. It works almost anywhere.
No signup, no feed, no cloud account. Connect with a link or a code, message like normal, and Komms finds a way to deliver — even when the network doesn't cooperate.
See how transport switching worksUnder the hood
One sealed envelope.
Any transport.
Identity, encryption, and conversations stay separate from the path carrying them. Same identity, same conversation — whichever route is available. When a route exposes metadata, Komms says so.
Read the threat modelChoose your depth
Start simple.
Go as deep as you need.
Start with the practical difference, see the system under the hood, or inspect every security decision.
Good questions
The short,
honest answers.
What Komms is, what you can install today, and what it still cannot promise.
What exactly is Komms?
Komms is a private, open-source messaging app in development. It is designed to let devices communicate directly, so your conversations do not depend on one company or one central server.
Can I download it today?
Yes. Komms 0.4.2 Beta has public test packages for Windows, macOS, Linux, Android, and the iOS Simulator. Desktop packages are unsigned, Android uses a test/debug certificate, and iOS is not a physical-device IPA. Verify UNSIGNED-TEST-SHA256SUMS before installing.
Does it really work without the internet?
Partly, today. The same sealed message is designed to travel over the internet, a local network, an encrypted file carried by hand, or an affordable radio. Internet, local network, and offline files work now; the Meshtastic radio carrier is in the Beta with physical two-radio qualification still open, and Bluetooth is planned.
Is it safe for high-risk situations?
Not today. Komms 0.4.2 is an unsigned test release with no independent security review, no independent reproduction, and no completed physical device or radio qualification. It should not be relied on for emergencies or high-risk communication.
Who owns Komms?
Komms is an open-source project under AGPLv3, stewarded by Kastro Labs. The license means anyone can inspect it, improve it, or build on it, and public versions must keep their source open too.
Will it have the features I already use?
Much of that surface already works in the Beta: rich text, editing, groups, files, voice notes, disappearing and view-once content, polls, roles, revocable linked devices, backups, Message Requests, and direct audio calls. Stable release qualification and polish remain, and bandwidth-heavy features wait for a suitable connection.
Ready for the technical version? See how Komms works, or open the complete documentation.
Komms 0.4.2 Beta · unsigned test release
Try it today. Test it honestly.
Public test packages for Windows, macOS, Linux, Android, and the iOS Simulator. Production signing and stable qualification remain open.
Unsigned test Beta: desktop packages are unsigned, Android uses a test/debug certificate, iOS is Simulator-only, and no independent security audit has occurred. Do not rely on this release for emergencies, high-risk communication, or production work.