"Onyx.md transformed my workflow! It's incredibly lightweight, yet powerful. The real-time sync and markdown-based notes make it my go-to knowledge management tool."
★★★★★
— Alex Carter, Developer & Writer
The Super Lightweight, Open Source Knowledge Manager
Fast. Flexible. Privacy-first. Markdown-based notetaking with real-time sync—without the bloat.
We help you to streamline your process with full optimization on the workflow
Lightweight & Efficient
Doesn’t slow down your system like Obsidian.
Real-Time Sync
Notes are updated instantly across all devices.
Markdown-Based
Simple, distraction-free writing.
Linked Notes & Knowledge Graph
Connect your ideas effortlessly.
Plugin Support
xtend features with an open API.
Open-Source
MIT-licensed. No subscriptions.
What Our Users Say
Hear first hand how our solutions have boosted online success for users like you.
Why choose us
Features
Onyx.md
Obsidian
Lightweight & Fast
✓ Uses low RAM
✗ Can be heavy
Open-Source
✓ Fully free (MIT)
✗ Freemium model
Real-Time Sync
✓ Free & Secure
✗ Paid feature
Modern UI
✓ Flutter-based
✗ Electron-based
Plugin Support
✓ Open API
✓ Large ecosystem