Open Source Secure & Encrypted Notes using CSS
A curated collection of the best open source note-taking apps with a focus on security and end-to-end encryption. using CSS.
Self-hosted timeline for quick notes, logs, and snippets
Stars
63,933Last commit
1 day agoLicense
MIT
Memos is a self-hosted, open-source note-taking app built around a private timeline. Write in Markdown, skip the folder setup, and keep your data on your own server.
Open Source Alternative to:
Encrypted note-taking that syncs across all your devices
Stars
56,810Last commit
1 day agoLicense
Unknown
Cross-platform note-taking app with end-to-end encryption, Markdown support, web clipping, and sync via Dropbox, OneDrive, or Joplin Cloud.
Open Source Alternative to:
Local-first, Git-native personal knowledge base with AI
Stars
20,116Last commit
13 hours agoLicense
AGPL-3.0
A free, open source note-taking app built on plain Markdown files, Git version control, and direct AI model integration. No account required.
Open Source Alternative to:
Cross-platform, secure password manager
Stars
29,324Last commit
9 hours agoLicense
GPL-3.0
KeePassXC is an open-source password manager that securely stores and manages sensitive information across Windows, macOS, and Linux.
Open Source Alternative to:
Zero-knowledge encrypted notes that sync across all devices
Stars
14,802Last commit
6 hours agoLicense
GPL-3.0
End-to-end encrypted note-taking app with zero-knowledge architecture, cross-device sync, web clipper, and a self-hostable sync server.
Open Source Alternative to:
Secure, encrypted notes for your digital life
Stars
6,672Last commit
3 days agoLicense
AGPL-3.0
Cross-platform note-taking app with end-to-end encryption, offline access, and powerful organization features for privacy-conscious users.
Open Source Alternative to:
Local-first notes app with no cloud, no AI, no tracking
Stars
1,348Last commit
3 days agoLicense
MIT
A privacy-focused, offline-first note-taking app that stores everything on your device, with Markdown, note linking, file attachments, LaTeX math, and bring-your-own sync.
Open Source Alternative to:
Distraction-free note-taking with powerful features
Stars
317Last commit
5 days agoLicense
AGPL-3.0
A customizable, offline-first note editor that lets you format text, create lists, add images, and export to HTML - all while maintaining your privacy.
Open Source Alternative to:
Fast, secure, and free personal note-taking app
Stars
178Last commit
3 months agoLicense
Unknown
OpenNotas is a multi-platform, end-to-end encrypted note-taking app that offers simplicity, synchronization, and offline functionality.
Open Source Alternative to:
Self-hosted sticky notes with better organization
Stars
36Last commit
22 days agoLicense
MIT
A self-hosted, open-source note-taking app that keeps the Google Keep sticky-note feel while adding folders, timelines, list views, and import support.
Open Source Alternative to:
Privacy-focused note-taking made simple and fast
Stars
67Last commit
9 months agoLicense
GPL-2.0
Justnote is a secure note-taking app that lets you easily create and sync notes across devices while maintaining full control of your data.
Open Source Alternative to:
Sent – Messaging Infrastructure for Developers. One API for SMS, WhatsApp, and RCS across 190+ countries.
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