Lockbook

End-to-end encrypted, collaborative notebook with offline support and Markdown/drawing

Desktopfreemiumglobal

An end-to-end encrypted desktop notebook that supports collaborative editing, Markdown, and simple drawings, with offline access and sync when reconnected. It’s designed for privacy-conscious note takers who need encrypted, multi-device notes and collaboration without exposing content to third parties. The app is offered as a freemium desktop release and is maintained on GitHub.

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Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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