Best Security Open Source Tools in 2026

Appsmith

Web & App Development AI & Machine Learning Business & Productivity+1

Build internal tools with a low-code drag-and-drop UI

stars 39.7Klicense Apache-2.0lang TypeScript

Open Core Developer Tools API Development Tools+10

KeePass

Security & Monitoring Business & Productivity

Free open source password manager with encrypted local file

stars 42license GPL-3.0lang TypeScript

Security Open Core Self Hosted+3

Prose

Communication & Collaboration Product & Project Management Web & App Development+1

Decentralized open source workplace with chat and docs

stars 36license MPL-2.0lang Rust

Chat File Sharing Self Hosted+6

KeePassXC

Security & Monitoring Business & Productivity IT Management

Cross-platform open source password manager with browser plugin

stars 26.8Klicense NOASSERTIONlang C++

Security Privacy Tools Authentication+4

Svix

Web & App Development IT Management Product & Project Management+4

Webhook platform with delivery guarantees, retries, and signing

stars 3.2Klicense MITlang Rust

API Infrastructure Developer Tools Authentication+12

Passbolt

Security & Monitoring Communication & Collaboration Business & Productivity+1

Open source team password manager with sharing and audit

stars 1.1Klicense AGPL-3.0lang Shell

Security Cybersecurity Authentication+9

Netdata

Security & Monitoring IT Management Data & Analytics

Real-time infrastructure monitoring with zero configuration

stars 78.6Klicense GPL-3.0lang C

Monitoring Cloud Management Server Management+4

Warrant

Web & App Development Security & Monitoring IT Management

Add RBAC, ABAC, and ReBAC to any app via API and SDK

stars 17license MITlang Go

Authorization API Infrastructure Developer Tools+7

Adapt

Communication & Collaboration

Lightweight self-hosted messaging platform for teams

stars 1license AGPL-3.0

Chat Self Hosted Open Core+4

Psono

Security & Monitoring IT Management Business & Productivity

Self-hosted password manager for teams with enterprise SSO

stars 98license NOASSERTIONlang Python

Self Hosted Open Core Cybersecurity+9

Cinny

Communication & Collaboration

Elegant open source Matrix client for self-hosted chat

stars 3.6Klicense AGPL-3.0lang TypeScript

Chat Self Hosted Open Core+1

Oso Cloud

Security & Monitoring Web & App Development AI & Machine Learning

Open source authorization with RBAC, ABAC, and ReBAC for any app

stars 3.5Klicense Apache-2.0lang Rust

Authorization Security Developer Tools+8

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Appsmith

KeePass

Prose

KeePassXC

Svix

Passbolt

Netdata

Warrant

Adapt

Psono

Cinny

Oso Cloud

Appsmith

KeePass

Prose

KeePassXC

Svix

Passbolt