Open Source Security &amp; Privacy Tools

Zen Browser

Privacy-focused browser with powerful customization

Stars
41,583
Forks
1,461
Last commit
10 hours ago

A Firefox-based browser offering enhanced privacy, split views, and extensive customization options for a personalized browsing experience.

Open Source Alternative to:

Firefox

Sentry

Real-time error tracking and performance monitoring

Stars
43,631
Forks
4,655
Last commit
4 hours ago

Detect, diagnose, and resolve software issues quickly with powerful error tracking, performance monitoring, and release management.

Open Source Alternative to:

DataDog

Mattermost

Secure collaboration platform for mission-critical work

Stars
36,295
Forks
8,543
Last commit
3 hours ago

Mattermost provides a flexible, open-source platform for secure team collaboration, designed for organizations with strict security and privacy requirements.

Open Source Alternative to:

Microsoft Teams

Better Auth

Framework-agnostic authentication for TypeScript applications

Stars
27,907
Forks
2,473
Last commit
5 hours ago

A comprehensive authentication framework offering email/password, social sign-on, two-factor auth, and multi-tenant support with full TypeScript integration.

Open Source Alternative to:

Clerk

Keycloak

Secure authentication and access control made simple

Stars
33,983
Forks
8,258
Last commit
7 hours ago

Comprehensive open source identity management solution offering single sign-on, social login, and fine-grained authorization for applications and services.

Open Source Alternative to:

Auth0

HashiCorp Vault

Secure, store, and control access to sensitive data

Stars
35,456
Forks
4,647
Last commit
3 hours ago

HashiCorp Vault is a powerful tool for managing secrets, protecting sensitive data, and controlling access using identity-based security.

Open Source Alternative to:

1Password

Tailscale

Zero-config VPN with WireGuard for secure networking

Stars
30,787
Forks
2,481
Last commit
3 hours ago

Deploy a modern WireGuard-based VPN with zero configuration. Connect devices securely across clouds, VPCs, and on-premises networks without firewall rules.

Open Source Alternative to:

JumpServer

Secure access management for modern IT infrastructure

Stars
30,329
Forks
5,699
Last commit
6 hours ago

Open-source privileged access management solution offering secure, browser-based access to SSH, RDP, Kubernetes, databases and remote applications.

Open Source Alternative to:

Teleport

ProjectDiscovery

Advanced vulnerability detection and management platform

Stars
28,013
Forks
3,358
Last commit
16 hours ago

Monitor infrastructure for exploitable vulnerabilities with real-time detection, automated workflows, and zero false positives.

Open Source Alternative to:

DataDog

Infisical

Secure secret management for modern development teams

Stars
26,070
Forks
1,812
Last commit
5 hours ago

End-to-end encrypted secret management platform for seamless integration and enhanced security in development workflows.

Open Source Alternative to:

Doppler

Ente

Secure, private photo storage and sharing solution

Stars
26,067
Forks
1,548
Last commit
17 hours ago

End-to-end encrypted cloud storage for photos and videos, offering privacy, security, and seamless cross-device syncing.

Open Source Alternative to:

Signal

Private messaging with end-to-end encryption

Stars
28,679
Forks
6,719
Last commit
4 days ago

Secure messaging app with state-of-the-art encryption, voice/video calls, group chats, and file sharing. No ads, trackers, or data collection.

Open Source Alternative to:

Session

Netbird

Zero Trust networking with WireGuard-based secure connectivity

Stars
24,615
Forks
1,279
Last commit
3 hours ago

Open source platform combining WireGuard overlay networks with Zero Trust access controls. Features SSO, MFA, device posture checks, and granular policies for secure remote connectivity.

Open Source Alternative to:

Pangolin

Zero trust network access that's better than VPN

Stars
20,369
Forks
653
Last commit
4 hours ago

Deploy zero trust access to infrastructure, self-hosted apps, and SaaS tools in days. Identity-aware security with seamless user experience.

Open Source Alternative to:

Authentik

Take control of your identity with a secure, flexible solution

Stars
21,082
Forks
1,553
Last commit
5 hours ago

authentik is an open-source identity provider that offers self-hosted authentication, authorization, and user management for businesses of all sizes.

Open Source Alternative to:

Clerk

Bitwarden

Secure password management for individuals and businesses

Stars
18,473
Forks
1,568
Last commit
3 hours ago

Bitwarden is an open source password manager that securely stores, shares, and autofills passwords across unlimited devices.

Open Source Alternative to:

1Password

Helium

Privacy-first browser with no ads, trackers, or bloat

Stars
13,865
Forks
305
Last commit
13 hours ago

Open-source Chromium-based browser offering best-in-class privacy protection, unbiased ad-blocking, split view, native !bangs, and zero bloat by default.

Open Source Alternative to:

Firefox

SuperTokens

Secure, customizable authentication for your applications

Stars
15,017
Forks
659
Last commit
19 hours ago

Open-source authentication solution offering flexible, self-hosted user management with advanced features and easy integration.

Open Source Alternative to:

Clerk

Zitadel

Secure, customizable identity infrastructure for developers

Stars
13,581
Forks
1,035
Last commit
1 day ago

ZITADEL provides a comprehensive identity management solution with easy APIs, customizable workflows, and serverless deployment options.

Open Source Alternative to:

Supabase

Ory

A certified and battle-tested identity solution

Stars
13,590
Forks
1,126
Last commit
15 hours ago

Ory is a certified and battle-tested identity solution backed by a large open source community and trusted by Fortune 500 companies.

Open Source Alternative to:

Clerk

Element

Secure, decentralized messaging for teams and individuals

Stars
13,004
Forks
2,568
Last commit
10 hours ago

Open-source platform for encrypted communication, file sharing, and collaboration based on the Matrix protocol.

Open Source Alternative to:

Discord

Logto

Secure, seamless authentication for modern applications

Stars
11,929
Forks
774
Last commit
3 hours ago

An open-source identity solution offering customizable login experiences, multi-tenant support, and comprehensive user management.

Open Source Alternative to:

Clerk

Unleash

Feature flags for rapid, risk-free software deployment

Stars
13,404
Forks
842
Last commit
16 hours ago

A powerful feature management platform enabling gradual rollouts, A/B testing, and seamless integration for continuous delivery.

Open Source Alternative to:

Fluxer

Open source messaging with privacy and community focus

Stars
8,318
Forks
468
Last commit
12 days ago

Free, open-source instant messaging and VoIP platform with full Markdown support, voice/video calls, moderation tools, and self-hosting options for communities.

Open Source Alternative to:

Discord

HyperDX

Full-stack observability without the enterprise price tag

Stars
9,454
Forks
392
Last commit
5 hours ago

Open source observability platform unifying session replays, logs, traces, metrics and errors. Fast search, automatic clustering, $0.40/GB pricing.

Open Source Alternative to:

DataDog

Highlight

Real-time observability for modern web applications

Stars
9,232
Forks
529
Last commit
5 days ago

Comprehensive monitoring solution offering error tracking, session replay, and performance insights for seamless debugging and optimization.

Open Source Alternative to:

DataDog

FireZone

Fast, flexible VPN replacement with zero-trust security

Stars
8,580
Forks
412
Last commit
3 hours ago

Replace your VPN with zero-trust access built on WireGuard. Fast, scalable network security with simple policies and identity provider integration.

Open Source Alternative to:

Teleport

GrowthBook

Open-source A/B testing and feature flagging platform

Stars
7,673
Forks
725
Last commit
5 hours ago

Powerful, developer-friendly experimentation tool for data-driven product decisions. Seamless integration, real-time insights, and flexible deployment.

Open Source Alternative to:

Stack Auth

Open-source authentication and user management platform

Stars
6,762
Forks
513
Last commit
5 hours ago

Stack Auth provides secure authentication, authorization, and user management for developers in just 5 minutes.

Open Source Alternative to:

Clerk

Tuta

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

Stars
7,486
Forks
611
Last commit
18 hours ago

Tuta offers encrypted email, calendar and contacts with quantum-resistant security, protecting your privacy without ads or tracking.

Open Source Alternative to:

Gmail

Cap

Privacy-first CAPTCHA alternative with proof-of-work

Stars
5,241
Forks
373
Last commit
14 hours ago

Lightweight open-source CAPTCHA solution using SHA-256 proof-of-work. 250x smaller than hCaptcha, fully customizable, and privacy-focused with zero telemetry.

Open Source Alternative to:

reCAPTCHA

UnKey

Secure, scalable API key management for developers

Stars
5,243
Forks
615
Last commit
6 hours ago

Streamline API authentication with UnKey's powerful, developer-friendly platform for creating, revoking, and monitoring API keys.

Open Source Alternative to:

Apigee

Permify

Build scalable authorization in minutes, not months

Stars
5,851
Forks
305
Last commit
1 day ago

Open-source authorization service for implementing fine-grained access controls. Centralized, scalable solution supporting RBAC, ABAC and ReBAC with Google Zanzibar-inspired architecture.

Open Source Alternative to:

Auth0

Flagsmith

Feature flags and remote config for rapid deployment

Stars
6,307
Forks
507
Last commit
10 hours ago

Powerful feature management platform for seamless software releases, A/B testing, and personalized user experiences.

Open Source Alternative to:

Passbolt

Secure password management for teams

Stars
5,848
Forks
382
Last commit
12 days ago

Open source password manager focused on security, collaboration and privacy for organizations

Open Source Alternative to:

1Password

Flipt

Git-native feature management for developers

Stars
4,775
Forks
281
Last commit
3 hours ago

A feature flag platform that integrates with Git workflows, enabling developers to manage features directly in their codebase.

Open Source Alternative to:

Cerbos

Secure, policy-based access control for modern applications

Stars
4,358
Forks
177
Last commit
17 hours ago

A scalable authorization layer that provides fine-grained access control through externalized policies, enabling secure and flexible permissions management.

Open Source Alternative to:

Auth0

Tracecat

Open source security automation platform for builders

Stars
3,554
Forks
350
Last commit
5 hours ago

Tracecat is a scalable, self-hostable platform for automating security workflows and playbooks without limits.

Open Source Alternative to:

Jira

BleachBit

Clean your system and free disk space

Stars
4,755
Forks
338
Last commit
1 day ago

BleachBit frees disk space & protects privacy by deleting cache, cookies, history & temp files from Firefox, Chrome & more. Open source for Linux/Windows.

Open Source Alternative to:

CCleaner

Cinny

Secure and elegant Matrix client for seamless conversations

Stars
3,571
Forks
506
Last commit
9 hours ago

Cinny offers a simple, elegant, and secure interface for Matrix-based conversations, protected by end-to-end encryption.

Open Source Alternative to:

Discord

Hanko

Secure, passwordless authentication for modern web apps

Stars
8,904
Forks
1,011
Last commit
11 hours ago

Streamline user authentication with passwordless login, enhancing security and user experience for your web applications.

Open Source Alternative to:

Clerk

Puter

Your personal cloud for files, apps, and games

Stars
40,504
Forks
3,646
Last commit
10 hours ago

Puter is a privacy-focused personal cloud platform that securely stores your files, apps, and games, accessible from anywhere.

Open Source Alternative to:

Zen Browser

Privacy-focused browser with powerful customization

Stars
41,583
Forks
1,461
Last commit
10 hours ago

A Firefox-based browser offering enhanced privacy, split views, and extensive customization options for a personalized browsing experience.

Open Source Alternative to:

Firefox

Sentry

Real-time error tracking and performance monitoring

Stars
43,631
Forks
4,655
Last commit
4 hours ago

Detect, diagnose, and resolve software issues quickly with powerful error tracking, performance monitoring, and release management.

Open Source Alternative to:

DataDog

Mattermost

Secure collaboration platform for mission-critical work

Stars
36,295
Forks
8,543
Last commit
3 hours ago

Mattermost provides a flexible, open-source platform for secure team collaboration, designed for organizations with strict security and privacy requirements.

Open Source Alternative to:

Microsoft Teams

Better Auth

Framework-agnostic authentication for TypeScript applications

Stars
27,907
Forks
2,473
Last commit
5 hours ago

A comprehensive authentication framework offering email/password, social sign-on, two-factor auth, and multi-tenant support with full TypeScript integration.

Open Source Alternative to:

Clerk

Keycloak

Secure authentication and access control made simple

Stars
33,983
Forks
8,258
Last commit
7 hours ago

Comprehensive open source identity management solution offering single sign-on, social login, and fine-grained authorization for applications and services.

Open Source Alternative to:

Auth0

HashiCorp Vault

Secure, store, and control access to sensitive data

Stars
35,456
Forks
4,647
Last commit
3 hours ago

HashiCorp Vault is a powerful tool for managing secrets, protecting sensitive data, and controlling access using identity-based security.

Open Source Alternative to:

1Password

Tailscale

Zero-config VPN with WireGuard for secure networking

Stars
30,787
Forks
2,481
Last commit
3 hours ago

Deploy a modern WireGuard-based VPN with zero configuration. Connect devices securely across clouds, VPCs, and on-premises networks without firewall rules.

Open Source Alternative to:

JumpServer

Secure access management for modern IT infrastructure

Stars
30,329
Forks
5,699
Last commit
6 hours ago

Open-source privileged access management solution offering secure, browser-based access to SSH, RDP, Kubernetes, databases and remote applications.

Open Source Alternative to:

Teleport

ProjectDiscovery

Advanced vulnerability detection and management platform

Stars
28,013
Forks
3,358
Last commit
16 hours ago

Monitor infrastructure for exploitable vulnerabilities with real-time detection, automated workflows, and zero false positives.

Open Source Alternative to:

DataDog

Infisical

Secure secret management for modern development teams

Stars
26,070
Forks
1,812
Last commit
5 hours ago

End-to-end encrypted secret management platform for seamless integration and enhanced security in development workflows.

Open Source Alternative to:

Doppler

Ente

Secure, private photo storage and sharing solution

Stars
26,067
Forks
1,548
Last commit
17 hours ago

End-to-end encrypted cloud storage for photos and videos, offering privacy, security, and seamless cross-device syncing.

Open Source Alternative to:

Signal

Private messaging with end-to-end encryption

Stars
28,679
Forks
6,719
Last commit
4 days ago

Secure messaging app with state-of-the-art encryption, voice/video calls, group chats, and file sharing. No ads, trackers, or data collection.

Open Source Alternative to:

Session

Netbird

Zero Trust networking with WireGuard-based secure connectivity

Stars
24,615
Forks
1,279
Last commit
3 hours ago

Open source platform combining WireGuard overlay networks with Zero Trust access controls. Features SSO, MFA, device posture checks, and granular policies for secure remote connectivity.

Open Source Alternative to:

Pangolin

Zero trust network access that's better than VPN

Stars
20,369
Forks
653
Last commit
4 hours ago

Deploy zero trust access to infrastructure, self-hosted apps, and SaaS tools in days. Identity-aware security with seamless user experience.

Open Source Alternative to:

Authentik

Take control of your identity with a secure, flexible solution

Stars
21,082
Forks
1,553
Last commit
5 hours ago

authentik is an open-source identity provider that offers self-hosted authentication, authorization, and user management for businesses of all sizes.

Open Source Alternative to:

Clerk

Bitwarden

Secure password management for individuals and businesses

Stars
18,473
Forks
1,568
Last commit
3 hours ago

Bitwarden is an open source password manager that securely stores, shares, and autofills passwords across unlimited devices.

Open Source Alternative to:

1Password

Helium

Privacy-first browser with no ads, trackers, or bloat

Stars
13,865
Forks
305
Last commit
13 hours ago

Open-source Chromium-based browser offering best-in-class privacy protection, unbiased ad-blocking, split view, native !bangs, and zero bloat by default.

Open Source Alternative to:

Firefox

SuperTokens

Secure, customizable authentication for your applications

Stars
15,017
Forks
659
Last commit
19 hours ago

Open-source authentication solution offering flexible, self-hosted user management with advanced features and easy integration.

Open Source Alternative to:

Clerk

Zitadel

Secure, customizable identity infrastructure for developers

Stars
13,581
Forks
1,035
Last commit
1 day ago

ZITADEL provides a comprehensive identity management solution with easy APIs, customizable workflows, and serverless deployment options.

Open Source Alternative to:

Supabase

Ory

A certified and battle-tested identity solution

Stars
13,590
Forks
1,126
Last commit
15 hours ago

Ory is a certified and battle-tested identity solution backed by a large open source community and trusted by Fortune 500 companies.

Open Source Alternative to:

Clerk

Element

Secure, decentralized messaging for teams and individuals

Stars
13,004
Forks
2,568
Last commit
10 hours ago

Open-source platform for encrypted communication, file sharing, and collaboration based on the Matrix protocol.

Open Source Alternative to:

Discord

Logto

Secure, seamless authentication for modern applications

Stars
11,929
Forks
774
Last commit
3 hours ago

An open-source identity solution offering customizable login experiences, multi-tenant support, and comprehensive user management.

Open Source Alternative to:

Clerk

Unleash

Feature flags for rapid, risk-free software deployment

Stars
13,404
Forks
842
Last commit
16 hours ago

A powerful feature management platform enabling gradual rollouts, A/B testing, and seamless integration for continuous delivery.

Open Source Alternative to:

Fluxer

Open source messaging with privacy and community focus

Stars
8,318
Forks
468
Last commit
12 days ago

Free, open-source instant messaging and VoIP platform with full Markdown support, voice/video calls, moderation tools, and self-hosting options for communities.

Open Source Alternative to:

Discord

HyperDX

Full-stack observability without the enterprise price tag

Stars
9,454
Forks
392
Last commit
5 hours ago

Open source observability platform unifying session replays, logs, traces, metrics and errors. Fast search, automatic clustering, $0.40/GB pricing.

Open Source Alternative to:

DataDog

Highlight

Real-time observability for modern web applications

Stars
9,232
Forks
529
Last commit
5 days ago

Comprehensive monitoring solution offering error tracking, session replay, and performance insights for seamless debugging and optimization.

Open Source Alternative to:

DataDog

FireZone

Fast, flexible VPN replacement with zero-trust security

Stars
8,580
Forks
412
Last commit
3 hours ago

Replace your VPN with zero-trust access built on WireGuard. Fast, scalable network security with simple policies and identity provider integration.

Open Source Alternative to:

Teleport

GrowthBook

Open-source A/B testing and feature flagging platform

Stars
7,673
Forks
725
Last commit
5 hours ago

Powerful, developer-friendly experimentation tool for data-driven product decisions. Seamless integration, real-time insights, and flexible deployment.

Open Source Alternative to:

Stack Auth

Open-source authentication and user management platform

Stars
6,762
Forks
513
Last commit
5 hours ago

Stack Auth provides secure authentication, authorization, and user management for developers in just 5 minutes.

Open Source Alternative to:

Clerk

Tuta

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

Stars
7,486
Forks
611
Last commit
18 hours ago

Tuta offers encrypted email, calendar and contacts with quantum-resistant security, protecting your privacy without ads or tracking.

Open Source Alternative to:

Gmail

Cap

Privacy-first CAPTCHA alternative with proof-of-work

Stars
5,241
Forks
373
Last commit
14 hours ago

Lightweight open-source CAPTCHA solution using SHA-256 proof-of-work. 250x smaller than hCaptcha, fully customizable, and privacy-focused with zero telemetry.

Open Source Alternative to:

reCAPTCHA

UnKey

Secure, scalable API key management for developers

Stars
5,243
Forks
615
Last commit
6 hours ago

Streamline API authentication with UnKey's powerful, developer-friendly platform for creating, revoking, and monitoring API keys.

Open Source Alternative to:

Apigee

Permify

Build scalable authorization in minutes, not months

Stars
5,851
Forks
305
Last commit
1 day ago

Open-source authorization service for implementing fine-grained access controls. Centralized, scalable solution supporting RBAC, ABAC and ReBAC with Google Zanzibar-inspired architecture.

Open Source Alternative to:

Auth0

Flagsmith

Feature flags and remote config for rapid deployment

Stars
6,307
Forks
507
Last commit
10 hours ago

Powerful feature management platform for seamless software releases, A/B testing, and personalized user experiences.

Open Source Alternative to:

Passbolt

Secure password management for teams

Stars
5,848
Forks
382
Last commit
12 days ago

Open source password manager focused on security, collaboration and privacy for organizations

Open Source Alternative to:

1Password

Flipt

Git-native feature management for developers

Stars
4,775
Forks
281
Last commit
3 hours ago

A feature flag platform that integrates with Git workflows, enabling developers to manage features directly in their codebase.

Open Source Alternative to: