Disasters
Earthquakes, floods and storms take out cell sites first. Lifeline routes around the damage using the phones still standing.
When the towers go down, the Wi-Fi dies and the SIM says No Service — Lifeline keeps going. Your phone becomes the network, passing encrypted messages hand-to-hand until they arrive.
Every phone can already talk directly to the phones around it. Lifeline turns that latent radio into a resilient network — one that nobody owns and nobody can switch off.
Earthquakes, floods and storms take out cell sites first. Lifeline routes around the damage using the phones still standing.
Grid failures and government internet shutdowns silence millions. A Lifeline mesh needs neither power grid nor ISP.
Festivals, stadiums and protests overload the towers until nothing sends. The denser the crowd, the stronger a Lifeline mesh becomes.
Trails, mountains and open water have no coverage at all. Keep your group connected miles from the nearest bar of signal.
There's no server in the middle. A message hops from phone to phone — and if the next phone is out of range, it rides along in someone's pocket until it finds a path forward.
Compose a message like normal. It's sealed with end-to-end encryption before it ever leaves your device.
Your phone hands it to every Lifeline device in Bluetooth or Wi-Fi range — no pairing, no setup.
If nobody's in range, the message waits — stored safely — and travels in a stranger's pocket toward its destination.
Only the intended recipient can open it. A signed receipt travels back so you know it truly landed.
Every relay is blind. Phones in between move the sealed envelope without ever being able to read it — they can't even tell who it's for. More people means more paths, not less privacy.
Lifeline is far more than offline chat. It's built for the messy reality of emergencies, expeditions and dense crowds.
Every message is sealed on your device and can only be opened by the person you sent it to. Modern public-key cryptography — the same class of math that secures Signal — with forward secrecy so a stolen key can't unlock your past.
Always onNo router, no base station, no single point of failure. Devices discover each other automatically and rebuild routes on the fly as people move — the network reshapes itself around whoever is there.
Bluetooth LE + Wi-FiBroadcast a distress beacon carrying your GPS coordinates to everyone in the mesh, prioritized above all other traffic. Rescuers see exactly where you are, even with no signal of any kind.
Emergency priorityLost your group in a crowd or on the trail? See the direction and distance to your people, updated as the mesh relays their position.
LiveSend an alert to everyone within a radius — "flooding on Main St," "water at the north gate." The message spreads to a place, not a contact list.
BroadcastCoordinate a whole team, family or rescue crew in one encrypted channel that stays in sync across the mesh as members come and go.
Multi-partyOne gesture erases every message, key and trace from your device instantly — for the moments when your phone is about to fall into the wrong hands. Nothing recoverable is left behind.
Duress-readyNo more wondering if it got through. When your message finally lands, the recipient's device returns a signed receipt that only they could produce — carried back to you across the same mesh.
VerifiableThe instant a single phone regains a sliver of signal — a satellite text, one bar at a ridge line — it can act as a gateway, draining the mesh's queued messages out to the internet and pulling replies back in for everyone.
Opportunistic bridgeBuilt on Bluetooth Low Energy so it can run quietly in your pocket for days, relaying for others without draining your battery — then reach further and faster over Wi-Fi when it's available.
All-day enduranceSpin up a shared incident map for a search, a hike or a festival meet-up. Pins, statuses and check-ins sync across everyone in the mesh — no cell service, no cloud account.
In previewThe same mesh, adapted to wildly different situations.
Keep families and first responders talking when infrastructure is rubble.
Stay in touch across a valley or a peak with no coverage for miles.
Find your group and coordinate when 50,000 phones jam every tower.
Communicate even under internet shutdowns — nothing to block, no server to seize.
Boats, ranches and off-grid sites where cell towers simply don't reach.
A private, local network for a neighborhood, a school or a worksite.
Other tools solve pieces of this. Lifeline is built to carry a message across people and gaps with no infrastructure at all — and bridge to the internet the moment it can.
| Capability | Lifeline | Briar | bitchat | Meshtastic | Nostr |
|---|---|---|---|---|---|
| Works with no internet or cell | Yes | Yes | Yes | Yes | No |
| Phone-to-phone, no extra hardware | Yes | Yes | Yes | Needs LoRa radio | No |
| Carries messages across gaps (delay-tolerant) | Yes | Limited | Limited | Limited | No |
| End-to-end encrypted | Yes | Yes | Yes | Channel keys | DMs only |
| No account or phone number | Yes | Yes | Yes | Yes | Yes |
| Group messaging | Yes | Yes | Yes | Yes | Partial |
| SOS + live location | Yes | No | No | Yes | No |
| Opportunistic internet bridge | Yes | Via Tor | Via Nostr | MQTT | Is the internet |
| Open source | Yes | Yes | Yes | Yes | Yes |
Comparison reflects each project's typical capabilities as of 2026 and is meant to be fair rather than exhaustive; all of these are worthwhile open-source projects. Corrections welcome via an issue.
Privacy isn't a setting you turn on in Lifeline — it's the only way it works. There's no company in the middle because there's no middle at all.
There's nothing to sign up for and no identity to leak. Your keys live only on your device.
Every hop moves a sealed envelope. Intermediaries can't see the contents — or even the recipient.
Keys rotate constantly. Compromising a device today can't retroactively unlock yesterday's messages.
There is no database of who talked to whom, because that data is never created in the first place.
Destroy every trace in a single gesture when a device is at risk of being taken.
The whole protocol and app are public. Anyone can verify exactly what it does — and doesn't — do.
A resilient communication tool should never be a black box. Lifeline's protocol, cryptography and apps are fully open — engineered in the open, hardened with automated security testing, and free for anyone to inspect, run and improve.
The engine, transport and crypto are written in Rust and continuously fuzz-tested.
Static & dynamic analysis, dependency scanning and an OpenSSF Scorecard run on every change.
A published whitepaper describes exactly how messages move and stay private.
Issues, discussions and contributions are open. Help build the network that can't be switched off.
Lifeline is in open alpha. Explore the code, run the mesh, and help shape a network that belongs to everyone and to no one.