IP addresses break, dial keys instead

Add peer-to-peer connectivity to your app, agent, or workflow.

Read the Docs

strada

Ottomatic

Rayfish Outl

“Iroh let us drop zero-trust identity and connectivity straight into our app—we ripped out the old stuff and this is so much cleaner.”

Dario

Founder at Rayfish

Swift Rust JavaScript Kotlin Python Go

Raspberry Pi

Espressif

Linux

Windows

Apple

Android

Built for environments where connectivity is unreliable or intermittent

Use all the radios: Wi-Fi, cellular, ethernet, LAN, or Bluetooth, or bring your own transport.
Lean on the cloud less with direct links that bypass NATs and firewalls, with stateless relays as fallback.
Secure end-to-end encryption, with opt-in observability to diagnose issues and improve performance.

How are people using iroh?

Remote Access

Embed direct, encrypted connections right in your app and create tunnels for remote access instead of third-party VPNs.

Distributed AI Training

Train foundation LLMs with compute distributed around the world, across AWS, GCP, Azure, and self-hosted infrastructure.

Video Streaming

Stream video between devices, using peer to peer technology. Create encrypted connections built on open standards, across the globe or across the room.

Real-time Sync for Mobile Applications

Powers apps for hundreds of thousands of devices around the world, even when internet access is precarious.

Point of Sale Payments

Connect payment terminals directly to point of sale systems over Bluetooth, LAN, or Wi-Fi with full PCI compliance and no additional servers.

IoT & Embedded Devices

Run iroh on ESP32, Raspberry Pi, and Linux with the same API. Devices discover each other automatically. No brokers, no gateways.

File Transfer & Sync

Move files and large blobs directly between devices with content-addressed, resumable transfers that verify every byte.

Ready for production

Performant. Every commit to iroh's main branch runs through a growing set of simulations & tests.
Monitored. Observability and network diagnostics track connection health and throughput.
Supported. Every major release is supported for multiple years with extended support contracts available.

Get help from the pros

Open source.
Forever.

The core peer-to-peer technology is open source and built on open standards, so you're never locked in: connect over our free community relays, self-host your own, let us run them for you, and switch between them whenever you want.

Start building.

Read the Docs

App.swift

import IrohLib

@main
struct App {
    static func main() async throws {
        // Dial a peer and echo a message over a bidirectional stream.
        let endpoint = try await Endpoint.bind(
            options: EndpointOptions(preset: presetN0())
        )

        let conn = try await endpoint.connect(addr: serverAddr, alpn: ALPN)
        let bi = try await conn.openBi()

        try await bi.send().writeAll(buf: Data("hello iroh".utf8))
        try await bi.send().finish()

        let echoed = try await bi.recv().readToEnd(sizeLimit: 64)
        print(String(decoding: echoed, as: UTF8.self))
    }
}