Fundraising auctions that raise more.
CapyBidder turns your next nonprofit event into a live, last-one-standing auction your team can run from a browser. Bidders stay in or drop out each round, and giving climbs with every turn.
Free during beta. Built for nonprofit organizers.
Weekend Lake Cabin
Donated by Lakeside Resort · $40 / round
Calm Otter's turn
6 still in
Organizer workflow
One place to plan, run, and close the auction
The public site is for nonprofit teams deciding whether CapyBidder fits their event. The product itself keeps the organizer flow practical: prizes, bidders, live state, and results all stay connected.
See nonprofit featuresBefore the event
Build the auction catalog
Create the event, add donated prizes, set each round fee, and publish when your nonprofit is ready.
Event day
Run it from the organizer dashboard
Start prizes, watch who is still in, see whose turn is active, and keep the room moving from one browser.
After the final round
Send winners and invoices
CapyBidder summarizes winners, bidder totals, donor credits, and redemption notes so follow-up is clear.
How it works
A new kind of auction
Forget silent bids and a single winning number. CapyBidder runs on rounds — the longer people stay in, the more your cause raises.
Set up your event
Add your prizes — donor, value, photos, fee per round. Publish when you're ready. It takes minutes.
Bidders take turns
Everyone who's registered decides each round: Stay In or Exit. Each round a bidder stays carries a small fixed fee that goes straight to your cause — a real contribution, paid whether or not they win.
Last one standing wins
Tension builds, rounds add up, and giving climbs far past a single bid. The final bidder takes the prize.
For nonprofits
Serious about your mission
Real money is at stake, so trust comes first. The whimsy is in the experience — never in how we handle your fundraiser.
Built for real money
Clear invoices, transparent per-round fees, and a verifiable winner for every prize. No guesswork.
Made for nonprofits
Designed around how fundraising events actually run — donors, prizes, redemption, and results in one place.
Calm until it counts
Browsing is clean and quiet. When it's your turn, the screen comes alive with a live countdown. No confusion.
Pricing
Simple, and aligned with you
CapyBidder is free while we're in beta. When we launch, pricing is just 2% of auction gross receipts — we only earn when you raise money.
See full pricingReady to raise more at your next event?
Set up a nonprofit auction, invite your bidders, and watch the room come alive.
Plan a beta auction