A lake looks still. Underneath, everything moves.
They say a good idea is worth gold, and that you should guard it like one. That's wrong. A secret idea is worth nothing: it meets no critics, no market, no builders. The Leman Paradox takes the opposite bet: publish every idea in full, market and features and flaws included, and let anyone run with it.
What you'll find here
Product concepts, researched seriously and written freely. Some are grand, some are absurd, some are both at once: a seed-filled pebble to throw at a window, a drone that guards your house, a plea for guardians of virtue. They sit side by side on purpose: you never know which stone makes waves.
Why "Leman"?
Because this site was born on the shores of Lake Geneva, le Léman, and because the lake is the right symbol: a calm surface hiding deep currents. Every idea published here is a pebble thrown into the water. Most sink. Some ripple.
Help yourself
If an idea inspires you, build it. You owe nothing to anyone, though a message is always a pleasure.
New files are written to disk regularly.
Get each new concept in your inbox the day it's published. One email, no noise.
Every idea on this site is a complete business concept, free to take. Market, features, flaws: published in full under CC BY 4.0. You read one, you like it, you build it.
Good first reads:
- The Haven ProgramA real-world protection program for people fleeing domestic violence, because the most dangerous moment is the moment they leave.
- ThreatShieldForward a suspicious email, get a risk score back in seconds.
- TuttiA dark stage where every orchestra section glows, and your hands shape how a finished score feels instead of drawing it with a mouse.
Received. Your claim lands on the board after a quick human read, usually within a day or two.
Say it loud, if you like. The card is yours too:
20 image(s). Original cover artwork from an earlier era of the catalogue. The site moved on to its window-and-emoji vignettes; these stay here, because they were made with care.
All illustrations are original works by Maryna Lagereva. Double-click any picture to view it full size.
- Take an idea. Everything on this machine is published under CC BY 4.0: complete, free, no strings. You do not need my permission, my blessing, or my email to start.
- Tell me anyway. The "I'm building this" buttons open a thirty-second form (a short email works too), at either moment: when you start or when you ship. Name or alias, a link if you have one, one line about the project.
- Get listed. Your project goes on the board and on the idea's own page, with a link, for as long as this site exists. Launched projects take the top spot in their idea's history.
The assistant files every entry. He is very thorough. Buttons not working? Write to hello@thelemanparadox.com.
Good day. I maintain this system. Would you like a short tour?