A delay-tolerant messenger for nearby devices and local networks when the internet is slow or down. Not a replacement for Signal, cell towers, or emergency services.
Nearby-device and local-network chat when the internet is slow or down. Trained early adopters; limited, not proven at city scale.
Festivals, construction, expeditions — places where cellular is absent or overloaded. Preview-grade security; not operational comms for a hostile environment.
A public bootstrap relay can help nodes find each other across NAT. Disaster or censorship via that default relay is limited / no in the mesh repo assessment.
Do not use Mycelium as a substitute for 112 / 911, rescue coordination, or primary comms against targeted surveillance. Call your local emergency number.
End-to-end encrypted messages travel between devices directly. No account, no phone number, no server reading your words. Messages are signed and verified at every hop.
Messages are held by intermediate devices and delivered when a path becomes available — even hours later. The system never gives up on delivery. It just waits for an opportunity.
Post public information to a local scope — shelter locations, road conditions, safety updates — visible to everyone in range without a server hosting it.
MeshCoin (MXC) is an experimental utility token that allows basic transactions to settle on the mesh. No bank, no payment processor, no internet required. Not for real-value transactions during beta.
Share your GPS coordinates once, on request, into any conversation. No continuous tracking. No data leaving your device without your knowledge.
One tap in Settings immediately deletes all messages, your identity key, and all stored data. For situations where that matters.
No account. No phone number. Your identity is a cryptographic key that lives only on your device.
Nearby devices running Mycelium find each other automatically. The relay server handles connections over the internet when available.
Messages travel from device to device. Each phone becomes a relay for others. The network builds itself.
The app switches to local mesh automatically. Reduced range, same features.
"It started with a thought about a person in Africa too poor for a bank account — but holding a phone. Then: what if their internet disappeared? Moscow went dark one day. A city full of devices, perfectly capable of talking to each other. No software to let them. That's what Mycelium is."
— Alexander Senf, founder
Read the full story →We're looking for technical early adopters and field crews who will read the limitations first. This is not an emergency-services product. Tell us briefly how you would test it.