Open Source Security Apps
Discover the best open source security tools for vulnerability scanning, threat detection & access control. Protect your system with community-driven solutions.
Apps in Security
Language
License
OpenSandbox
Developer Tools · Security
Secure, fast, and extensible sandbox runtime for AI agents with multi-language SDKs and Docker/Kubernetes runtimes.
Phase Console
Devops · Security
End-to-end encrypted secrets management for engineering teams — from local dev to Kubernetes production.
Shadowbroker
Analytics · Monitoring · Security
Self-hosted OSINT dashboard that fuses 60+ live intelligence feeds — flight tracking, ship AIS, satellites, CCTV, seismic and radio networks — into one real-time map, with an agent-ready command channel for AI co-analysts.
CubeSandbox
AI Agents · Developer Tools · Security
Instant, concurrent, hardware-isolated MicroVM sandboxes for AI agents — E2B-API compatible, sub-60ms cold starts, and a built-in zero-trust egress proxy, all self-hostable at scale.
CertMate
Devops · Security
Automate SSL certificate lifecycle across any CA, 24+ DNS providers, and every major secret store — with a REST API, web dashboard, and built-in MCP server for AI-driven ops.
VoidAuth
Authentication · Security
Self-hosted SSO with OIDC, LDAP, passkeys, and proxy auth for your entire self-hosted stack
Cosmos-Server
Authentication · Security
All-in-one self-hosted home server with SmartShield anti-DDoS, Nebula mesh VPN, automatic HTTPS, and a 250-app marketplace — all secured behind a unified auth layer.
web-check
Developer Tools · Security
All-in-one OSINT dashboard that dissects any website's IP, SSL, DNS, headers, cookies, ports, trackers, and more in a single scan.
Enclosed
Security
Send end-to-end encrypted notes and files where the server never sees your content — true zero-knowledge sharing.
Bramble
Authentication · Password Manager · Security
Local-first, end-to-end encrypted password manager that syncs your vault directly between your own devices over a private peer-to-peer mesh — no server, no account, no cloud in the middle.
hoodik
File Storage · Security
Self-hosted, end-to-end encrypted cloud storage with browser-based encryption and S3-compatible storage support
Marble
Analytics · Security
The open-source, self-hostable fraud detection and AML compliance engine that gives fintechs full control over their detection rules, data, and investigations.
ALTCHA
Security
A self-hosted, privacy-first CAPTCHA alternative that uses memory-hard proof-of-work to stop bots without cookies, tracking, or third-party APIs.
PrivateCaptcha
Authentication · Security
Privacy-first, self-hostable Proof-of-Work CAPTCHA for GDPR-compliant bot protection.
Networking Toolbox
Developer Tools · Security
The offline-first networking toolbox for sysadmins — 100+ subnet, DNS, DHCP, and TLS utilities that work without internet access.
About Security
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.
