Install, or just open it
Grab the desktop app for your OS, or open the web app in your browser. Your encrypted vault is ready in seconds.
End-to-end encrypted · local-first
A mind that
answers to no one.
End-to-end encrypted markdown notes that sync in real time across your devices — not even the server can read them. Every note links into a living graph, and a single shared link turns your vault into an external brain that web AIs can read.
Free · no ads · no telemetry · your data stays yours.
Hosted in Switzerland
AES-256
Open .md format
Real-time sync
No telemetry
How it works
From blank page to second brain.
Three steps. No setup rituals, no account gymnastics.
Write & link
Plain markdown with [[wikilinks]], backlinks and a living graph. Every note connects to the next.
Sync & share
Notes sync end-to-end encrypted across your devices. Share one link and a web AI reads your vault as context.
Features
Everything you need to think.
A small set of well-made primitives. Nothing fashionable, nothing in your way.
Real-time sync
Your notes show up instantly on every device, online or offline.
End-to-end encryption
AES-256 derived from your password. The server only ever stores unreadable data.
An AI brain
Share any note or project as a link, and web AIs read it as living context — an external brain that connects them to what you know.
Links & graph
Wikilinks, backlinks, mentions and a living graph of your knowledge — on desktop and mobile.
Canvas
An infinite whiteboard to connect notes, cards and ideas visually.
Flashcards
Spaced repetition (SM-2) straight from your notes: front :: back.
Rich markdown
Math (KaTeX), Mermaid diagrams, transclusions, properties and queries.
Publish to the web
Share a single note or an entire “digital garden” through a public link.
Instant search
Find anything in milliseconds — full-text search across your whole vault, titles and tags included.
An external brain
Your notes, readable by your AI.
Wikilinks, backlinks and a living graph turn your vault into a structure machines can follow. Share a note or a whole project as a single link and hand it to ChatGPT, Claude and more — they read it as context, not a flat file.
- Wikilinks, backlinks & mentions
- A living knowledge graph
- Shareable links, revocable anytime
- Readable by any web AI
Security model
A server that can't read your notes.
Your password never leaves your device. We derive an encryption key from it locally, encrypt every note with AES-256, and only then sync the ciphertext. Lose your passphrase and even we can't recover your notes — that's the point.
- Key derived on your device
- AES-256, per note
- The server stores ciphertext only
- Local-first: offline by default
How it compares
The same workflow, without the trade-offs.
Wikilinks, backlinks and a living graph like you'd expect — plus end-to-end encryption and AI-ready sharing the others charge for, or skip.
| MORTIS CLOUD | Obsidian | Notion | |
|---|---|---|---|
| End-to-end encryption | ✓ Built-in | Paid add-on | — |
| Real-time sync, free | ✓ | Paid | ✓ |
| Living knowledge graph | ✓ | ✓ | — |
| Share as AI-readable context | ✓ | Paid (Publish) | Public pages |
| No ads, no telemetry | ✓ | ✓ | — |
| Price | Free | Free* | Free tier |
Fair-play note. Compared on each product’s default, free offering (June 2026); features change — check their sites. Obsidian’s local plain-text files and Notion’s databases have real strengths of their own — this is only about what Mortis does differently.
Download
Pick your system.
The download starts from this site — always the latest version.
Don't want to install?
Use the web app directly in your browser.
macOS and Linux are unsigned at launch: a security warning may appear (trusted build, signing coming soon).
FAQ
Questions, answered.
Is MORTIS CLOUD really free?
Yes. The apps, real-time sync and end-to-end encryption are all free, with no ads, no trackers and no telemetry.
Can the server read my notes?
No. Your note content is encrypted on your device with AES-256 before it syncs, so the server only ever stores ciphertext that only you can unlock. If you lose your passphrase, not even we can recover it. (Note titles and folder names are kept as metadata so sync works.)
Does it work offline?
Yes. Mortis is local-first: your notes live on your device, so you can read and write them fully offline. Changes sync automatically the next time you are online.
Which platforms are supported?
Desktop apps for Windows, macOS and Linux, a browser web app, and a mobile app, all sharing the same encrypted vault.
Is my data locked in?
No. Everything is plain markdown with standard wikilinks and frontmatter, an open format you fully own rather than a proprietary database.
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