Direct voice, video & screen share
The devices on a call carry it themselves, over a link they open between each other. For calls large enough that everyone connecting to everyone gets heavy, a relay helps carry the room.
Private · Decentralized · Matrix-compatible
Nobody in the middle.
Messages, voice, and video travel straight from your device to theirs, encrypted end to end and held by the people in the conversation. And the gathering place your people come back to — channels, voice rooms, the whole crowd — runs on a server you own. One platform covers both.
Private
The direct line
messaging, voice & video, encrypted end to end and carried by the devices in the conversation
Together
The gathering place
channels, voice rooms, and roles on a server you own — a browser link is the whole sign-up
Connected
Two meshes, one map
peers found over libp2p, messages carried by Reticulum, and Matrix keeping everyone reachable
In plain words
It goes straight to your friend.
Sealed on your device
Your message is locked before it leaves. Only your friend's device holds the key.
Travels the straight line
It moves through a private tunnel that runs from your device to theirs.
Held by the people in it
The conversation lives on your devices — yours and your friends'.
The mesh map
See who you can reach, right now.
Concord draws you a live map of the people within reach — who is online and how to get to them. It changes as they do.
The people you trust send signed updates continuously, and anything that stops being refreshed drops off on its own. What you are looking at is today's picture, kept true by the people in it.
- Kept current by your contactssigned updates arrive continuously, on their own
- Clears itself outanything that stops being refreshed disappears from the map
- Three hops of reachthe people you trust, and the people they trust
How the traffic moves
Device to device.
Found over libp2p, sealed in WireGuard
Peers discover and dial each other across the libp2p swarm. Every
connection that forms is wrapped in its own boringtun
WireGuard tunnel, built entirely in userspace — it runs with the
same permissions as any app you open.
Matrix underneath
Concord is built on Matrix, so a server you run can federate with the rest of the Matrix network. The people you already talk to stay reachable.
Rides the Reticulum mesh
Concord speaks Reticulum — the mesh network that runs over anything, from ordinary TCP links to LoRa radios. Watch your mesh live in the app, announces and all, and let messages travel it when that is the road that reaches your people.
Two programs
One you carry. One you host.
Concord comes in two builds. They are built for different jobs, and between them they cover everything you need — the private conversations you have all day, and the shared place your people come to.
This is the whole idea: the ease of a gathering place and the privacy of a direct line, unified in one platform. Your server keeps the room warm and the door open; your app keeps the conversation yours.
The short version: the app is you. The server is the place you meet.
Concord
A peer-to-peer messenger. Your conversations, your contacts, and your map of who is reachable live on your own devices, and your messages and calls travel straight to the people in them — over libp2p and WireGuard on the everyday internet, over the Reticulum mesh where that is the road that works.
It is also your way into any Concord Docker server you join, so group rooms sit alongside your private threads in one app.
Desktop and mobile · pay what you want
Concord Docker
A gathering place at a fixed address, running on a machine that stays on. It holds the channels, the voice rooms, and the member list, and anyone you invite walks in through a browser link.
It also keeps the mesh map warm around the clock for everyone pointed at it — the full story is below.
Self-hosted · free
Concord Docker
Own the room.
Concord Docker is the free server edition. One command puts a complete Concord at an address you own: text channels, voice rooms people drop in and out of, screen sharing, roles, invites, and moderation — running on your hardware, under your rules.
Anyone you invite opens a link in a browser and they are there — the link is the whole sign-up. The desktop and mobile apps connect to the same place.
It stays online when you close your laptop, and it works the mesh map on everyone's behalf: it tracks who is reachable around the clock, keeps that picture fresh for the people pointed at it, and introduces strangers who trust the same server so they can add each other. That is how a room of regulars turns into a network.
It is also your community's foothold on the Reticulum mesh. The server runs a Reticulum transport node, gives browser users a mesh entrypoint, and holds sealed messages for friends who are offline — handing them over when they return, never able to read them.
Your address, your hardware, your rules. Yours to own outright.
- Channels and voice roomstext where it belongs, voice you drop into and leave, screens shared when it helps
- Roles, invites, moderationdecide who gets in, who can speak, and who helps you run the place
- Opens in a browsera link is the entire sign-up; installing the app is optional
- Always in the mesh mapkeeps the picture of who is reachable fresh, and introduces people who have yet to meet
- A door onto Reticulumruns a transport node on the mesh and holds sealed mail for the offline — delivered on return, readable only by them
- Free, and yours to keeprun it on a spare machine or a cheap server; federate outward or keep it to your own people
For a handful of friends
A room that is simply always there. Drop in after work, leave voice running while you play, keep the group chat and the call in the same place. A DND table, a club, a class, a group of five — and as the server introduces friends of friends, the circle widens on its own. A spare machine is all it costs.
For a business
A front door customers reach in a browser: a storefront, a support desk, or a community around what you sell. Shape the channels and roles around how the business actually works, put it on your own domain, and keep the customer relationship in your own hands.
The social network that is not selling you anything — and can help you sell something.
Where this is going
This is the beta. Here is the plan.
Concord is built to outgrow its beginnings. Every purchase funds the team that hardens the platform and grows what it can carry.
-
Now
Beta
Everything on this page works today, priced pay-what-you-want. Early adopters get the full platform — and their feedback steers what ships next.
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Next
The team
Revenue goes straight into engineering: a dedicated team hardening the core, raising capacity, and shipping at a professional cadence.
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Then
1.0
The hardened release — stable, proven, and ready to carry communities at scale. It ships when it meets that bar.
Experts wanted
Help build it right.
Concord sits at the crossing of mesh networking, cryptography, real-time media, and interface design. If you carry deep expertise in any of them, your eyes make the platform better — read the source, challenge the architecture, or bring your craft to the team the beta is funding.
Read it yourself
Read the code before you trust it.
The whole source is here: how connections are made, how they are encrypted, how people find each other. Read it, build it, or take the Concord Docker server and run it yourself.
Pay what you want
Name your price.
$3 is the suggestion. What you pay funds the work that turns this beta into 1.0. Already paid? Skip straight to the download.
Choose your amount
suggested
You are buying the beta build. Checkout is handled by Lemon Squeezy, the merchant of record: they take the payment, email your receipt, and handle sales tax and VAT worldwide. Your card and email stay on their side.