Works off the grid
Radio to radio, with no towers, Wi-Fi or servers in between. Every radio can relay, so adding radios extends the reach.
New
Mobile app coming to iOS and Android
Text your team when there's no signal.
Reaper Mesh turns small, inexpensive LoRa radios into an off-grid messaging network. Send messages, share positions and see your team on a map, with no internet, no cell service and no accounts.
No radio yet? The web app includes a simulated device, so you can try everything in Chrome, Edge or Brave right now.
- No internet
- No cell service
- No accounts
- Open source
Why Reaper Mesh
Communication you can depend on when the network can't.
A deliberately small, stable radio core, messages that tell you exactly how far they got, and new features built into the apps, so your radios rarely need updating.
Honest delivery
Every message shows queued, transmitted, delivered, failed or unknown. Nothing is marked delivered unless the other radio confirmed it.
Never sends twice
If a link drops mid-send, the app asks the radio what happened instead of guessing or resending.
Private when you need it
Encrypted channels keep message text between key holders, and team networks rotate their keys to keep outsiders off your network.
Your team on the map
Positions, shared points and areas, distance measuring and MGRS, with map areas you have viewed kept for offline use.
Cheap, open hardware
Runs on Heltec and LILYGO boards that cost a few tens of dollars. Firmware, apps, protocol and docs are open source.
See it in action
Everything your team needs, on one screen.
Built for gloves and mounted phones: large touch targets, a night palette that keeps your eyes adjusted, and a layout that works on a vest, dash or handlebar mount.
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CommsChannels and direct messages with real delivery states -
MapNodes, positions and shared points and areas -
NodesWho has been heard, when and how far away -
DeviceLive radio status at a glance -
SettingsEvery setting, saved safely on the device
How it works
Your phone talks to your radio. Radios talk to each other.
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Your appPhone or browser
- USB or Bluetooth
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Your radioLoRa board
- LoRa
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RelayAny radio in between
- LoRa
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Your teamTheir radio and app
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You write a message
On an encrypted channel the app encrypts it first, so the radio only ever sees scrambled bytes.
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Your radio sends it
Over LoRa, within an airtime budget so no one floods the channel.
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Other radios relay it
A limited number of hops, to reach people beyond direct range.
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Their radio confirms
The receiving radio acknowledges it, and your app shows it as delivered.
Mobile app
Reaper Mesh for iPhone and Android.
Pair your phone with your radio over Bluetooth and keep messages arriving in the background. No accounts, no tracking: your messages and keys stay on your phone in an encrypted store.
Coming soonApp Store
Coming soonGoogle Play
Web app
Use it today, right in your browser.
The web app does everything the mobile app does, from messaging and maps to team keys and every radio setting. Nothing to install.
- USB or Bluetooth. Connect in Chrome, Edge or Brave on a computer.
- Try it with no hardware. Choose Use simulated device to explore with a virtual radio.
- Your data stays in your browser. Lock it with a PIN; the site only delivers the app.
Hardware
Runs on boards you can buy today.
Get two boards to send messages, three to relay. Install the firmware from your browser in about a minute, with nothing to download.
Heltec WiFi LoRa 32 V3
The simplest, cheapest place to start, with a built-in screen.
Heltec Wireless Stick V3
The smallest board, for compact kits and cases, with a glanceable status screen.
LILYGO T-Beam V1.2
Built for battery use, with an 18650 holder and a fuel gauge.
A working prototype
Two radios exchange messages reliably, and encryption and team networks work. Relaying through a third radio, outdoor range and long-running durability are still being field-tested, and the security design has not been independently audited. Don't rely on it for emergencies yet. Supports the US 915 MHz band only; always attach the antenna before transmitting.
Open source, top to bottom.
Firmware, apps, the radio protocol and the docs are all public under the Apache 2.0 license. Read the code, file an issue, or add a board.