Open Source Data Security & Privacy Tools

Open source data security & privacy tools

projects 26 combined stars ★ 222K refresh nightly

Data Security & Privacy is one of the most active slices of the open source world — the 14 projects below are ranked by GitHub stars, which makes this page roughly a community-voted shortlist rather than a vendor-curated catalogue. Every card shows the license and the last-commit date, so you can filter out the two failure modes of free software in one glance: restrictive licensing that blocks your use case, and abandonment that leaves you maintaining a fork. When two projects look comparable, prefer the one with more recent activity and the more permissive license (MIT/Apache-2.0 over AGPL) unless copyleft specifically serves your goals. Hover into any project for its full README — the documentation quality is usually the honest tell of engineering quality.

All Data Security & Privacy tools

Puter ★ 44K

A full desktop environment that runs in your browser

rank001 licenseAGPL-3.0 written inTypeScript typeData Security & Privacy

Mattermost ★ 40K

Secure collaboration platform for mission-critical work

rank002 licenseNOASSERTION written inTypeScript typeData Security & Privacy

Ente ★ 30K

Secure, private photo storage and sharing solution

rank003 licenseAGPL-3.0 written inDart typeData Security & Privacy

Signal ★ 30K

Private messaging with end-to-end encryption

rank004 licenseAGPL-3.0 written inKotlin typeData Security & Privacy

Element ★ 14K

Secure, decentralized messaging for teams and individuals

rank005 licenseAGPL-3.0 written inTypeScript typeData Security & Privacy

Fluxer ★ 11K

Open source messaging with privacy and community focus

rank006 licenseAGPL-3.0 written inTypeScript typeData Security & Privacy

certificates ★ 9.0K

🛡️ A private certificate authority (X.509 & SSH) & ACME server for secure automated certificate management, so you can use TLS everywhere & SSO for SSH.

rank007 licenseApache-2.0 written inGo typeData Security & Privacy

Tuta ★ 8.1K

Secure email, calendar and contacts with end-to-end encryption

rank008 licenseGPL-3.0 written inTypeScript typeData Security & Privacy

Zen ★ 4.3K

System-wide ad-blocking and privacy protection, no extensions needed

rank009 licenseMIT written inGo typeData Security & Privacy

Cinny ★ 4.0K

Secure and elegant Matrix client for seamless conversations

rank010 licenseAGPL-3.0 written inTypeScript typeData Security & Privacy

Certipy ★ 3.7K

Tool for Active Directory Certificate Services enumeration and abuse

rank011 licenseMIT written inPython typeData Security & Privacy

Stoat ★ 3.4K

Group chat for friends and communities, without the baggage

rank012 licenseNOASSERTION written inRust typeData Security & Privacy

Quiet ★ 2.7K

Serverless team chat over Tor, no phone number needed

rank013 licenseGPL-3.0 written inTypeScript typeData Security & Privacy

Wire ★ 2.6K

Secure collaboration platform with end-to-end encryption

rank014 licenseGPL-3.0 written in— typeData Security & Privacy

Peergos ★ 2.5K

Secure, private, and decentralized file storage

rank015 licenseAGPL-3.0 written inJava typeData Security & Privacy

certstrap ★ 2.5K

Tools to bootstrap CAs, certificate requests, and signed certificates.

rank016 licenseApache-2.0 written inGo typeData Security & Privacy

AutomatedLab ★ 2.2K

AutomatedLab is a provisioning solution and framework that lets you deploy complex labs on HyperV and Azure with simple PowerShell scripts. It supports all Wind

rank017 licenseMIT written inPowerShell typeData Security & Privacy

helm-secrets ★ 2.0K

A helm plugin that help manage secrets with Git workflow and store them anywhere

rank018 licenseApache-2.0 written inShell typeData Security & Privacy

Tongsuo ★ 1.6K

铜锁/Tongsuo is a Modern Cryptographic Primitives and Protocols Library

rank019 licenseApache-2.0 written inC typeData Security & Privacy

rememory ★ 1.5K

a digital safe with multiple keys, held by people you trust

rank020 licenseApache-2.0 written inGo typeData Security & Privacy

docker-nginx-certbot ★ 1.2K

Automatically create and renew website certificates for free using the Let's Encrypt certificate authority.

rank021 licenseMIT written inShell typeData Security & Privacy

certspotter ★ 1.2K

Lightweight Certificate Transparency Log Monitor

rank022 licenseMPL-2.0 written inGo typeData Security & Privacy

ejbca-ce ★ 967

EJBCA® – Open-source public key infrastructure (PKI) and certificate authority (CA) software.

rank023 licenseLGPL-2.1 written inJava typeData Security & Privacy

routinator ★ 579

An RPKI Validator and RTR server written in Rust

rank024 licenseBSD-3-Clause written inRust typeData Security & Privacy

pki ★ 514

The Dogtag Certificate System is an enterprise-class Certificate Authority (CA) which supports all aspects of certificate lifecycle management, including key ar

rank025 licenseGPL-2.0 written inJava typeData Security & Privacy

SAMA ★ 161

Secure, scalable chat server for modern applications

rank026 licenseGPL-3.0 written inJavaScript typeData Security & Privacy

Frequently asked questions

How many open source Data Security & Privacy tools are there?

This registry tracks 26 open source Data Security & Privacy projects, with 222,059 combined GitHub stars. The list is ranked by stars and refreshed nightly.

What is the most popular open source Data Security & Privacy project?

Puter leads this category with 44,053 GitHub stars, followed by Mattermost.

Are these Data Security & Privacy tools free?

Yes — every project listed here is open source. Some also offer paid hosted versions alongside the free self-hosted option; the licence for each project is shown on its card.