21km.lol
Turns a real half-marathon shirt into a live sponsorship auction where higher bids get bigger, more prominent logo placements.
The problem it says it solves
Makes small-scale sponsorship more competitive, entertaining, transparent, and shareable instead of relying on fixed-price ad slots.
Who it says it is for
Startups, SaaS companies, agencies, local businesses, recruiters, founders, and
Revenue as published
| Figure | Value | What it means |
|---|---|---|
| Revenue, trailing 12 months | 308 | USD received in the twelve months before the snapshot |
Profile
| Founded | 2026-08-30 |
| Country | DE |
| Team | 1 person |
| Funding | Bootstrapped |
| Audience | Both |
| Payment provider | Stripe |
| Pricing | No fixed pricing. Bidding starts at €1 and is cumulative. Higher total bids move sponsors up the ranking. #1 gets the dominant front placement, #2–#11 |