CharityAuctions is silent auction software for nonprofits and schools. Same company as Charity Auctions Today, now at charityauctions.com. There is no upfront cost and no credit card to start. You build a private demo auction, preview it on guests’ phones, and delete it in one click if it is not a fit. When you run a real event you pay a success fee after you raise money: 5% on the free plan, 3% on prepaid plans starting at $499, or 0% on a custom plan. You do not pay a success fee on items that do not sell. Bidders use a link in their phone browser. No app download. In-room and online guests can bid on the same items. Support is included. Event-night help is free. We do not add optional donor tip prompts at checkout.