Local-first · macOS · Windows · Linux
mdai is a quiet Markdown editor. Your vault is an ordinary folder on your disk, your notes are ordinary .md files, and the assistant runs on your own API key — nothing is uploaded, nothing is held.
€14.99 one-time · 3 devices · 15-day trial, no card
Open your vault in any editor, sync it with anything, keep it forever. mdai never invents a format and never asks you to migrate.
Summarize, fix grammar, translate — a section or the whole document, with a line diff you accept or reject. Your key, your provider, your call.
Write a task anywhere and mdai gathers them across the vault. Headings become an outline you can jump through.
There is no mdai account and no sync service. Your files sit on your disk and your licence is a key: after a one-time check when you start the trial and when you activate, the app works offline. Add an API key when you want the assistant, and delete it when you don't.
No subscription. No account. No upsell inside the app.
Bring your own AI key — mdai never resells tokens.
mdai is €14.99 once, with no server you rent from us. The licence check is the only thing holding the next version up, and published, it would last an afternoon. What people actually want from open source you get here anyway: your writing stays ordinary Markdown files that no app can lock away, and every single network request mdai makes is published in full, down to the address and what is in it.