#53 in Notes & Knowledge ManagementUpdated 2026-08

OpenNotas

by OpenNotas · Cross-platform personal notes with end-to-end encryption and pluggable sync

22.8 — BenchRank score out of 100

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Overview

OpenNotas is an open-source, PWA-based note-taking app for phones and desktops, covering Windows, macOS and Linux. Notes are encrypted with AES on the device before reaching a sync server, and the secret key never leaves the device. Sync is set up through pluggable adapters — Turso, S3-compatible storage, or local-only — so you choose where the data is stored.

Best for: Individuals wanting a simple cross-platform note app with end-to-end encryption and self-chosen sync
Pricing: The pages call the app free and open-source but show no prices, plans or paid tiers.

Strengths and trade-offs

Strengths

Open-source; runs on Windows, macOS, Linux and mobile
AES end-to-end encryption, with the key kept on your device
Pluggable sync adapters: Turso, S3-compatible storage, or local-only
Works offline and needs no account to start writing

Trade-offs

Sync requires configuring an adapter and bringing your own backend
Personal note-taking only; nothing stated about teams or shared notes
Deliberately minimal, with no organisation or editing features described

How this score is made up

Each dimension is scored out of 100 and combined into the headline score using fixed weights.

MCP support: 0 out of 100
Documentation: 45 out of 100
Agent friendliness: 41 out of 100
Changelog: 0 out of 100
Marketing site structure: 45 out of 100
Operational trust: 0 out of 100

Measured, but not part of the score

Useful to know, but not a mark for or against the product — so these do not affect the ranking.

Openness: 30 out of 100
Maintenance: 100 out of 100

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