An open source cybersecurity protocol for syncing decentralized graph data.

starsStars 12364
forksForks 799
watchersWatchers 12364
current-versionCurrent version 0.2019.413
total-releasesTotal releases 17
open_issues_countOpen issues 201
dateFirst release 2015-01-21
dateLatest release 2019-04-15
updateLast update 2020-12-23

GUN is an ecosystem of tools that let you build encrypted applications.

Currently, HackerNoon run GUN in production.

Decentralized alternatives to free fun future for freedom:

The ecosystem is one nice stack of technologies that looks like this: (names -> use case)

For now, it is best to start with GUN and just use it to learn the basics, since it is so easy: (or want to read more? Skip ahead to the "


  • Try the interactive tutorial in the browser (5min ~ average developer).
  • Or npm install gun and run the examples with cd node_modules/gun && npm start (5min ~ average developer).

Note: If you don't have this first. If the npm command line didn't work, you may need to mkdir node_modules first or use sudo.

<script src=""></script>
// var Gun = require('gun'); // in NodeJS
// var Gun = require('gun/gun'); // in React
var gun = Gun();

  name: "Mark",
  email: "",

gun.get('mark').on(function(data, key){
  console.log("update:", data);
  • Or try something mind blowing, like saving circular references to a table of documents! (play)
var cat = {name: "Fluffy", species: "kitty"};
var mark = {boss: cat};
cat.slave = mark;

// partial updates merge with existing data!

// access the data as if it is a document.
gun.get('mark').get('boss').get('name').once(function(data, key){
  // `val` grabs the data once, no subscriptions.
  console.log("Mark's boss is", data);

// traverse a graph of circular references!
gun.get('mark').get('boss').get('slave').once(function(data, key){
  console.log("Mark is the slave!", data);

// add both of them to a table!

// grab each item once from the table, continuously:
gun.get('list').map().once(function(data, key){
  console.log("Item:", data);

// live update the table!
gun.get('list').set({type: "cucumber", goal: "scare cat"});

Want to keep building more? Jump to THE DOCUMENTATION!

What is GUN?

First & foremost, GUN is a community of the nicest and most helpful people out there. So I want to invite you to come tell us about what you are working on & wanting to build (new or old school alike! Just be nice as well.) and ask us your questions directly. :)

On that note, let's get some official shout outs covered first:


Thanks to:

Robert Heessels, Lorenzo Mangani, NLnet Foundation, Sam Liu, Daniel Dombrowsky, Vincent Woo, AJ ONeal, Bill Ottman, Mike Lange, Sean Matheson, Alan Mimms, Dário Freire, John Williamson, Robin Bron, Elie Makhoul, Mike Staub, Bradley Matusiak


Mark Nadal in 2014 after he had spent 4 years trying to get his collaborative web app to scale up with traditional databases.

Master-Slave database architecture causes one big bottleneck, he (as a complete newbie outsider) naively decided to question the status quo and shake things up with controversial, heretical, and contrarian experiments:

The NoDB - no master, no servers, no "single source of truth", not built with a real programming language or real hardware, no DevOps, no locking, not just SQL or NoSQL but both (all - graphs, documents, tables, key/value).

The goal was to build a P2P database that could survive living inside any browser, and could correctly sync data between any device after assuming any offline-first activity.

Technically, GUN is a graph synchronization protocol with a lightweight embedded engine, capable of doing 20M+ API ops/sec in just ~9KB gzipped size.


This would not be possible without community contributors, big shout out to:

Python Port);

I am missing many others, apologies, will be adding them soon! This list is infintiely old & way out of date, if you want to be listed in it please make a PR! :)


Tests may be run with npm test. Tests will trigger persistent writes to the DB, so subsequent runs of the test will fail. You must clear the DB before running the tests again. This can be done by running the following command in the project directory.

rm -rf *data*

Additional Cryptography Libraries

These are only needed for NodeJS & React Native, they shim the native Browser WebCrypto API.

If you want to use SEA for User auth and security, you will need to install:

npm install text-encoding @peculiar/webcrypto --save

Please see our React Native docs for installation instructions!

Then you can require SEA without an error:

var GUN = require('gun/gun');
var SEA = require('gun/sea');


Note: The default examples that get auto-deployed on npm start CDN-ify all GUN files, modules, & storage.

To quickly spin up a GUN relay peer for your development team, utilize either, etc. ! Or use all of them so your relays are decentralized too!

Heroku deletes your data every 15 minutes, one way to fix this is by adding cheap storage.


git clone
cd gun
heroku create
git push -f heroku HEAD:master

Then visit the URL in the output of the 'heroku create' step, in a browser.

npm install -g now
now --npm amark/gun

Then visit the URL in the output of the 'now --npm' step, in your browser.

Fork this GUN repo (Unubo only deploys from your own GitHub repo's).
Add a Node.js app, select your GUN fork, set npm start start as the command and deploy.

From the experience of genderev, this only works if you set your country to the United States.

Visit the deployed app by following the 'view app' button, in your browser.

Warning: Docker image is community contributed and may be old with missing security updates, please check version numbers to compare.

Pull from the . Or:

docker run -p 8765:8765 gundb/gun

Or build the Docker image locally:

git clone
cd gun
docker build -t myrepo/gundb:v1 .
docker run -p 8765:8765 myrepo/gundb:v1

Or, if you prefer your Docker image with metadata labels (Linux/Mac only):

npm run docker
docker run -p 8765:8765 username/gun:git

Then visit http://localhost:8765 in your browser.


Designed with by Mark Nadal, the GUN team, and many amazing contributors.

Openly licensed under Zlib / MIT / Apache 2.0.