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 is the magic behind our ability to facilitate millions of private backbones in minutes. Impossible with traditional networks.”

Drew Raines

Head of Engineering at Datum

Michael Neale
Principal Engineer at Block

Swift Rust JavaScript Kotlin Python Go C

Raspberry Pi

Espressif

Linux

Windows

Apple

Android

Resilient by default

Built for environments where connectivity is unreliable or intermittent

Use all the paths
iroh's QUIC multipath implementation automatically switches between Wi-Fi, cellular, ethernet, LAN, LoRa, HaLow, Tor, Bluetooth—or bring your own transport.
Lean on the cloud less
Direct links bypass NATs and firewalls, with stateless relays as fallback. No data is stored on the cloud, unless you explicitly choose to store it there.
Encrypted and observable
Secure end-to-end encryption with optional observability to diagnose issues and improve performance.

Lower infrastructure costs

Move data directly. Pay the cloud less.

Iroh connects endpoints peer to peer whenever it can. Your application data can stay on your endpoints—no cloud storage required. Relays only forward end-to-end encrypted packets when a direct path is unavailable, cutting cloud egress and the infrastructure you have to operate.

No cloud storage required

data can stay on endpoints

Relays only forward

encrypted packets as fallback

See the full cost breakdown

Example workload

2,000 devices × 10 GB/month

Centralized server on AWS

20 TB crosses provider infrastructure

~$1,742/mo

plus compute

Iroh Pro at 98% direct

Only 400 GB traverses the relay

~$46/mo

Pro plus egress

Estimated monthly savings

$1,696

Illustrative estimate based on 98% direct traffic. Actual direct rates and costs vary by network conditions, usage, and region.

Open source.
Forever.

iroh is an open source peer-to-peer networking stack built on open standards, so you're never locked in. Connect over our free community infrastructure, self-host your own, let us host services for you, and switch between them anytime.

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.

Built to ship

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

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))
    }
}