COMPANY
A quieter way to
keep what you learn
Why we started
Most of us save far more than we ever read again. Highlights sit in one app, bookmarks in another, voice memos on a phone nobody opens. The ideas are there; they just never come back when they would help.
Lumen is our answer: one calm place that does the remembering, connects what belongs together and brings a few good notes back each day. No streak guilt, no folders to maintain, nothing you cannot take with you.
PRINCIPLES
Three promises we build around
Your library is yours
Private by default, exportable at any time as plain Markdown, and never sold or used to train anyone else's models.
Calm by design
A few good notes a day instead of a feed. No badges, no streak pressure, no notifications you did not ask for.
Remember, do not hoard
Saving is easy; using what you saved is the point. Every feature earns its place by bringing an idea back when it helps.
Read the full privacy policy and terms of service: [add links to your policies here].
JOURNAL
Notes from the team
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Product · 6 min read
Why we cap the daily review at five notes
More notes felt more useful in testing, until people stopped opening the review at all.
Engineering · 9 min read
Building search that understands what you meant
How we match the gist of a query to notes that share none of its words, and show why.
Design · 5 min read
Notes on quiet software
What we leave out of Lumen on purpose, and the requests we keep saying no to.
CONTACT
Talk to a person, not a queue
Questions about plans, a team setup or something that is not working? Send a note and someone who builds Lumen will reply.
Email
hello@yourdomain.com
Response time
Within one working day
Press and partnerships
press@yourdomain.com
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lumen
A quieter way to keep what you learn, and find it again when it matters.
© 2026 Lumen. All rights reserved.
Made for people who read a lot.