Open Source Security & Privacy Tools
A curated collection of the best open source software for protecting systems and data, spanning application and network security, identity and access management, secrets, and threat detection..
Secure collaboration platform with end-to-end encryption
Stars
2,555Last commit
10 months agoLicense
GPL-3.0
A comprehensive collaboration platform offering end-to-end encrypted messaging, file sharing, and video calls with enterprise-grade security and compliance features.
Open Source Alternative to:
Secure secret management with public key encryption
Stars
769Last commit
8 days agoLicense
MIT
Secure secret management platform with public key encryption, automated rotation, versioning, and real-time collaboration tools for development teams.
Open Source Alternative to:
Secure, deploy, and manage application secrets effortlessly
Stars
946Last commit
2 days agoLicense
MIT
Open source platform for engineering teams to manage secrets and environment variables from development to production, with powerful integrations.
Open Source Alternative to:
Feature management with GitOps for developers
Stars
814Last commit
4 days agoLicense
MIT
Featurevisor is an open-source tool for managing feature flags, experiments, and remote configuration directly from your Git repository.
Open Source Alternative to:
Real-time fraud detection and AML compliance engine
Stars
618Last commit
4 days agoLicense
Elastic-2.0
An open-source platform that enables fintech companies to monitor transactions and user activity, detect suspicious behaviors, and automate fraud prevention in real-time.
Open Source Alternative to:
Decentralized CAPTCHA for enhanced web security
Stars
303Last commit
1 day agoLicense
Apache-2.0
A blockchain-based CAPTCHA solution offering improved security, user experience, and resistance to bot attacks for web applications.
Open Source Alternative to:
GDPR-compliant bot protection without user friction
Stars
199Last commit
10 hours agoLicense
Unknown
Privacy-first CAPTCHA service that blocks bots while keeping forms accessible. No puzzles, no tracking, no cookies - just invisible cryptographic protection.
Open Source Alternative to:
Secure, scalable server access management for DevOps
Stars
169Last commit
2 days agoLicense
BUSL-1.1
Centralized platform for managing SSH access, enhancing security, and streamlining server administration for DevOps teams.
Open Source Alternative to:
Type-safe feature flags and remote config for developers
Stars
167Last commit
1 year agoLicense
AGPL-3.0
Abby offers open-source, fully typed feature flagging and remote configuration for React and Next.js, with multi-environment testing and debugging tools.
Open Source Alternative to:
Secure, scalable chat server for modern applications
Stars
161Last commit
1 month agoLicense
GPL-3.0
Open source chat server with end-to-end encryption, clustering support, and comprehensive messaging features for building real-time communication apps
Open Source Alternative to:
Invisible bot protection that respects user privacy
Stars
37Last commit
6 days agoLicense
MPL-2.0
Privacy-compliant CAPTCHA alternative using proof-of-work technology. Protects websites from bots and spam without user interaction or data tracking.
Open Source Alternative to:
Access control for AI agents your customers log in with
Stars
23Last commit
5 days agoLicense
BUSL-1.1
Detects AI agents using customer credentials, masks private fields, holds risky actions for passkey approval, and signs every decision on your own server.
Open Source Alternative to:
Docmost – Open-source wiki software with real-time collaboration, diagrams, AI, SSO, RBAC permissions and more.
Bright Data