Meshtastic
P2P ProtocolsOpen-source, off-grid, decentralized mesh networking protocol and firmware for affordable LoRa-enabled devices. Enables long-range, low-power text messaging, GPS position sharing, and telemetry without cellular or internet infrastructure. Uses flooding mesh topology where every node acts as both client and repeater, with multi-hop message relay extending coverage over several kilometers. Supports AES-256-CTR channel encryption and public-key direct messaging .
Fully P2P Community Low capture risk
Links
Details
License GPL-3.0
Dev Status Released
Owner Meshtastic LLC (registered trademark); founded by Kevin Hester (geeksville); firmware development led by Ben Meadors (thebentern); community-driven open-source project with 100+ contributors
Country USA
Start Year 2020
Stack C, Protocol Buffers, Kotlin, Swift, Python, TypeScript, Bluetooth LE, WiFi
Funding Community, Donations
Last Investigated Jan 15, 2026
P2P Protocol Attributes
P2P Architecture Flooding mesh (every node simultaneously client and repeater; messages rebroadcast by all receiving nodes until destination reached or hop limit exhausted; stateless forwarding; configurable max hop count; up to ~100 concurrent devices per mesh)
Overlay Network LoRa radio mesh (operates on ISM bands — 868 MHz EU, 915 MHz US, etc.; independent of IP networks; optional MQTT bridge connects mesh to internet; can bridge distant meshes via internet gateway)
Content Addressing No (messages addressed by node ID / destination address; no content-based addressing)
Local-First Yes (fully offline-capable; no internet or cellular infrastructure required; all communication via direct LoRa radio; store-and-forward for delayed delivery)
E2EE Partial (AES-256-CTR symmetric encryption on channels — all channel members share key; public-key encryption for direct messages using Curve25519; headers remain visible for mesh routing; admin actions use PKI)
CRDTs Lib No (no CRDT implementation; stateless message forwarding protocol)
Byzantine Fault Tolerance Limited (flooding mesh is inherently resilient to node failure — messages take multiple paths; no formal BFT consensus; vulnerable to network congestion with many nodes; hop limit prevents infinite loops)
Signature Ed25519 (for public-key direct messages and admin channel authentication; channel messages use shared symmetric key without per-message signatures)
Permissions Channel-based (primary/secondary channels with shared encryption keys; admin channel with PKI for device configuration; no granular role-based access control beyond channel membership)
Semantic Web Compatability No
Smart Contract No
Protocol Stack Position Application-layer (built on TCP/IP)
Asset / Value Embedding None — Meshtastic is an open-source LoRa mesh radio project with no native token or economic layer. The project is donation-funded (Open Collective) and operated entirely on volunteer/cooperative principles.
Protocol Maturity / Standardization De Facto Standard (no formal standards body involvement; protocol defined by Protocol Buffer definitions in meshtastic/protobufs repository; versioned releases; wide de facto adoption with ~40,000 active nodes; community-driven development without formal specification process)