Documents · Canvas · One workspace
Write it down. Move it around.
Most tools make you pick: a document, or a whiteboard. Lumen is both, side by side, so an idea never has to be filed before it is finished.
No credit card. No trial timer. It is genuinely free.
Pages
Draft
Field notes, week 12
Three things worth keeping from this week
The prototype held up under real load
Onboarding still loses people at step two
Ship the canvas before the docs rewrite
Insert
Thinking is messy before it is tidy. Lumen gives the messy half somewhere to live, so the tidy half is worth writing.
How it works
Three moves, one surface
The whole product is a loop: scatter, shape, sharpen. You can enter it at any point.
Start on the canvas
Double-click anywhere and a note appears. Drag it, colour it, draw between them. Nothing needs a name or a folder yet.
cheaper than a whiteboard
and it remembers
no export step
Move it into a document
When the shape of an idea shows up, write it properly. Blocks for headings, to-dos, quotes, code and images — all reachable from one slash.
Type / to insert
Ask for a second opinion
Summarise, expand, tighten or brainstorm without leaving the page. The answer streams in beside your work, not in another tab.
Tighten this paragraph
Features
Small things, done properly
The details you only notice when they are missing.
A slash away
Twelve block types, all reachable without lifting your hands. Headings, to-dos, quotes, callouts, code, dividers, images.
Draw on the canvas
Pen, highlighter and eraser with pressure-aware strokes. Sketch a diagram, circle the thing that matters.
Find it instantly
Search across every page from the sidebar, or jump anywhere with the command palette.
Share a read-only link
Publish a page with one click. Readers get a clean view and can leave comments without an account.
Synced across devices
Edits stream to your other tabs and devices live. Close the laptop, open the phone, keep going.
Locked to your account
Row-level security in the database means the rules hold even if the app is wrong.
A real dark mode
Not an inverted filter. A separate palette, drawn for reading at night.
Keyboard first
Every common action has a shortcut, and the ones worth knowing are shown as you go.
Organise
Everything in one file tree
Folders, favourites and drag-to-organise. Or ignore all of it and search instead.
Discuss
Comments where the work is
Leave a note on a page, or let a reader of a shared link do the same.
Return
Favourites that stay put
Star the three pages you actually open and they sit at the top, always.
Lumen AI
A second pair of eyes, built in
Six focused actions instead of an open-ended chat box you have to prompt-engineer. Each one does exactly what its name says, and streams the answer as it writes.
Summarise
Two sentences, in your voice.
Expand
More detail, same structure.
Improve
Clearer, without new claims.
Fix grammar
Corrections only, nothing else.
Brainstorm
Five to seven directions.
Outline
Headings and sub-points.
Pricing
Free, and honest about why
Lumen runs entirely on free tiers — Supabase for data and auth, Gemini for AI, Vercel for hosting. There is no paid plan hiding behind a feature you need.
Everything, included
$0
per month, per person, forever
- Unlimited pages and folders
- Unlimited sticky notes and drawings
- All twelve block types
- AI actions and chat
- Public share links with comments
- Live sync across devices
- Image uploads
- Light and dark themes
The only limit is your own Supabase project's free quota.
Give the messy half somewhere to live.
Open a blank canvas, drop one note on it, and see whether the rest follows.