Discover the best open source security tools for vulnerability scanning, threat detection & access control. Protect your system with community-driven solutions.
Security
Privacy-compliant CAPTCHA alternative with proof-of-work and code challenges
Authentication · Security
OpenID Certified SSO & MFA portal for reverse proxies
Authentication · Ecommerce · Security
Self-hosted SSO identity provider with SAML, OAuth2, OIDC, LDAP, and RADIUS support
Password Manager · Security
Self-host Bitwarden's secure password management backend with Docker and .NET Core
Devops · Security
Automatic HTTPS. Zero config. Powered by Go.
Developer Tools · Devops · Security
Automate SSL certificates across 22 DNS providers with API and web UI
Authentication · Security
Secure your self-hosted apps with built-in authentication, reverse proxy, and anti-DDOS protection.
File Storage · Security
Secure, ephemeral note and file sharing with client-side encryption
Authentication · Security
The only WireGuard solution with built-in MFA, SSO, and real-time client sync
Devops · Hosting Control Panel · Security
Open source alternative to Vercel, Netlify, and Heroku — deploy apps and databases on your own server.
Security · Team Chat
Secure, self-hostable Matrix web client with modules and enterprise-grade security
Authentication · Security
Zero-trust VPN built on WireGuard® — 3x faster than OpenVPN, peer-to-peer, and self-hostable.
Developer Tools · Security
Expose local services to the internet without public IP or port forwarding
Authentication · Security
Modern, privacy-focused authentication built for developers
File Storage · Security
Secure, self-hosted cloud storage with end-to-end encryption
Monitoring · Security
Secure database and server access with AI-powered data masking and command blocking
Developer Tools · Security
Centralize secrets, certificates, and SSH access with open-source secret management.
Security
Secure, offline password management with YubiKey, TOTP, and browser integration
Developer Tools · File Storage · Security
Fast, secure, deduplicated backups to any storage—CLI or GUI.
Monitoring · Security
Real-time detection of malware C2 traffic, port scans, and suspicious network activity
Security
Secure, configuration-free private networks with zero-trust access controls
Analytics · Data Engineering · Monitoring
X-Ray Vision for Your Infrastructure: Every Metric, Every Second.
Developer Tools · Security
Offline networking utilities for sysadmins — no internet required
Automation · Security
Automate WireGuard networks across clouds, Kubernetes, and edge devices
Developer Tools · Networking · Security
Easy Nginx reverse proxying with SSL for home servers and self-hosted apps
File Storage · Note Taking · Security
Privacy-first note-taking with end-to-end encryption—open source and cross-platform.
File Storage · Security
Secure, self-destructing links for sharing passwords and sensitive data
Analytics · Monitoring · Product Management
Self-hosted session replay with DevTools, real-user monitoring, and privacy controls
Security
Accurate open source vulnerability data with API and scanner integration
File Storage · Security
Self-hosted file sharing without limits or tracking
Password Manager · Security
Self-hosted, audited password manager API for secure team credential sharing
Authentication · Devops · Security
Secure, self-hostable secrets management with CLI, SDKs, and Kubernetes integration
Authentication · Security
Privacy-focused, self-hosted CAPTCHA alternative to reCAPTCHA and hCaptcha
Developer Tools · Monitoring · Security
Powerful alternative to Postman & Charles Proxy with API mocking and HTTP interception
Developer Tools · File Storage · Security
Self-hosted remote desktop with P2P, file transfer, and multi-platform support
Security
Self-hosted WAF to block web attacks, bots, and DDoS with dynamic encryption
Analytics · Developer Tools · Monitoring
Debug production errors and performance issues in real time
AI Assistants · Search · Security
Find person profiles across 1000+ social media platforms with AI-powered detection and metadata extraction
Developer Tools · Devops · Security
Deploy JAMStack and serverless apps with Git integration
Authentication · Security
Open-source alternative to Auth0, Firebase Auth, and AWS Cognito
Security
Secure, auditable access to all your infrastructure—without VPNs or bastion hosts.
Monitoring · Security
Detect threats inside your app—beyond firewalls and SIEMs.
AI Assistants · Automation · Security
No-code AI automation for security and IT workflows
Automation · Devops · Security
Auto-configuring reverse proxy for microservices with dynamic service discovery
Developer Tools · Devops · Security
Cloud-native API gateway for REST, GraphQL, gRPC & TCP with enterprise-grade features
Developer Tools · Monitoring · Security
Control feature releases with confidence—open-source feature flagging for dev teams.
Authentication · Password Manager · Security
Self-hosted Bitwarden server with full API compatibility and low resource usage
Authentication · Security
Self-hosted SSO for your private apps with passkeys, OIDC, and admin controls
Monitoring · Security
Comprehensive OSINT analysis for any website in one dashboard
Security software is a critical component of modern development and operations. These applications focus on identifying, preventing, and responding to security risks across a variety of platforms and environments. Core functionality often includes vulnerability scanning, threat detection, access control, encryption, and security monitoring. They provide layers of defense to safeguard sensitive information and maintain system integrity.
Typical use cases include protecting web applications from common attacks, securing cloud infrastructure, managing user authentication and authorization, detecting malicious activity within networks, and ensuring data privacy. Features commonly found in this category include intrusion detection systems (IDS), firewalls, secure code analysis tools, and compliance auditing capabilities. Effective security solutions allow teams to proactively identify weaknesses before they can be exploited, minimizing potential damage and downtime.
Investing in robust security practices is paramount for any organization handling data or operating online. Open source Security applications offer transparency, customizability, and community support – providing developers with greater control over their security posture. They help address compliance requirements, build trust with users, and protect valuable assets from evolving cyber threats. Regular security assessments, incident response planning tools, and secure communication protocols are key benefits.