Why nonprofits search for free auction sites
When a school PTA or community nonprofit decides to run an online auction, the first instinct is to search for something free. The logic makes sense: every dollar spent on software is a dollar that doesn't go to the mission. But free auction tools come with tradeoffs that matter more than the price tag suggests. Some cap your item count at 25. Others take a percentage of every winning bid. A few are genuinely free but so limited that volunteers spend more time working around the software than running the auction.
This guide compares the best free and low-cost online auction platforms for nonprofits, covering what each one includes at no cost, where the limitations hit, and which type of organization each platform fits best. If you want to skip straight to the platform that handles auctions, events, mobile bidding, and AI-powered fundraising in one system, that would be momoGood.
What to evaluate in a free auction platform
Before comparing tools, establish what matters. A free tier that covers your needs today but breaks at 50 items or 200 bidders will cost more in workarounds than a paid platform would have cost upfront.
Item and bidder limits. Most free plans cap item count, bidder count, or both. Know where the ceiling is before you start loading items.
Payment processing fees. Even when the platform is free, payment processing is not. Standard credit card processing runs 2.9% plus $0.30 per transaction. Some platforms add their own fee on top. Others take 5-8% of gross revenue. Calculate total cost at your expected revenue, not just the sticker price.
Mobile bidding. Online auctions live and die by mobile bidding. Outbid notifications, one-tap bidding from a phone, and real-time bid updates drive auction revenue. Many free platforms lack these entirely.
Checkout and payment collection. Free tools often require manual invoicing of winners. Platforms with instant checkout send a payment link the moment the auction closes, reducing walkaways and getting your team home hours earlier.
Support. If something breaks at 7 PM on Saturday during your gala, you need help now, not a support ticket response on Monday. Free platforms rarely offer real-time support.
Best free online auction sites for nonprofits
1. momoGood
momoGood is not a free auction tool. It is a complete Events and Auctions platform built for nonprofits that want mobile bidding, outbid alerts, instant checkout, live and silent auctions, raffles, and real-time analytics in one system.
Why it belongs on this list: organizations searching for free auction sites often discover that free tools create more problems than they solve. momoGood eliminates the patchwork of free tools, spreadsheets, and manual payment collection that eats volunteer hours. AI-powered features including donor scoring and smart send-time optimization help your team raise more with less effort. The platform connects auctions to the rest of your fundraising operation, so a bidder at tonight's gala is the same contact your team cultivates year-round.
What is included: Mobile bidding with outbid alerts, silent and live auction management, item catalog with photo galleries, instant checkout and payment processing, real-time analytics, text and email communication, CRM integrations, dedicated support.
Pricing: Custom pricing based on organization size and event needs. See momoGood auction pricing for details. No multi-year contract required.
Best for: Nonprofits and schools running serious fundraising auctions that want a complete platform instead of a free tool they will outgrow. Talk to the team to see if it fits.
2. 32auctions
32auctions is one of the most recognized names in free online auction software, offering a genuinely free tier for small organizations.
What is included free: Unlimited auction items, basic auction page with item descriptions and photos, bidder registration, email outbid alerts, mobile-responsive pages, no percentage-of-revenue fee.
Limitations: Free plan includes 32auctions branding. No instant checkout or integrated payment processing on the free tier, meaning you collect payments manually. No mobile app or native mobile bidding. No live auction support, CRM integrations, or detailed reporting.
Pricing: Free tier available. Premium plans start around $49 for custom branding and payment processing integration. Credit card processing fees apply on all plans.
Best for: Small nonprofits, PTAs, and community groups running their first online auction and willing to handle payment collection manually in exchange for zero platform cost.
3. Auctria
Auctria sits between free tools and enterprise platforms, offering a free tier for small events with under 25 items.
What is included free: Basic auction website, item management, bidder registration, email communication, and mobile-responsive auction pages for events under 25 items.
Limitations: Free plan caps items at 25. Credit card processing requires Stripe and standard fees apply. The interface has a learning curve around event setup. Checkout requires more manual steps than premium platforms. Limited support on free and lower tiers.
Pricing: Free under 25 items. Paid plans run $150-$400 per event depending on features and item count. No percentage-of-revenue fee.
Best for: Small to mid-size nonprofits that need more features than 32auctions but want to stay below enterprise pricing.
4. BetterUnite
BetterUnite offers auction software as part of a broader nonprofit fundraising toolkit including peer-to-peer fundraising and donation pages.
What is included free: Basic auction functionality, a fundraising page, and donation processing with no monthly subscription.
Limitations: Platform charges approximately 5% of funds raised on top of credit card processing. A $20,000 auction costs $1,000 in platform fees alone. Auction features are less developed than dedicated platforms. Mobile bidding is functional but not polished.
Pricing: Free to use with a percentage-of-revenue model (approximately 5% plus payment processing). Paid plans with lower percentages are available.
Best for: Small nonprofits that want one platform for donations, peer-to-peer fundraising, and basic auctions, and are comfortable with percentage-based pricing.
5. GiveSmart
GiveSmart (now part of Community Brands) is an established auction and event fundraising platform for mid-size and larger nonprofits. No free tier, but often compared against free alternatives.
What is included: Mobile bidding with push notifications, silent and live auction management, event ticketing, fund-a-need, payment processing, instant checkout, event-day support, and reporting.
Limitations: No free plan. Pricing requires a sales conversation. Contract terms may include annual commitments. Ownership changes have affected development pace. Some users find the interface dated. Integration options outside Community Brands can be limited.
Pricing: Custom pricing, typically per-event fee plus percentage or flat platform fee. Contact GiveSmart for current rates.
Best for: Mid-size nonprofits and schools running established gala auctions that need mobile bidding and event-day support.
6. Handbid
Handbid is a mobile-first auction platform that emphasizes the bidding experience through a native mobile app. No free tier.
What is included: Native iOS and Android app for bidders, silent and live auction management, real-time bid tracking, push outbid notifications, payment processing, event-day support.
Limitations: No free plan. Pricing starts at several hundred dollars per event. Bidders must download the Handbid app, adding friction compared to web-based bidding. No broader fundraising tools like CRM or messaging.
Pricing: Per-event pricing varies by auction size. Expect several hundred to over a thousand dollars per event.
Best for: Organizations that prioritize native mobile bidding and have budget for per-event pricing.
7. OneCause
OneCause (formerly BidPal) is an enterprise-tier auction and event fundraising platform serving larger nonprofits with established gala programs.
What is included: Mobile bidding, silent and live auctions, event ticketing and table management, fund-a-need, streaming and virtual event support, instant checkout, dedicated event-day support team, comprehensive reporting.
Limitations: No free plan. Enterprise pricing with annual contracts. Can feel heavyweight for simpler auctions. Longer onboarding. Sales process is enterprise-oriented even for mid-size buyers.
Pricing: Enterprise pricing with annual contracts and per-event or platform fees. Contact OneCause for current rates.
Best for: Large nonprofits running major gala events with significant budgets and complex logistics.
Free vs. paid: the real cost comparison
Here is what a $20,000 silent auction looks like under different pricing models:
Free platform with manual payment collection: $0 in platform fees but 5-10 hours of volunteer time chasing payments. If 10-15% of winners walk away without paying (common without instant checkout), you lose $2,000-$3,000 in revenue a paid platform would have captured automatically.
Percentage-of-revenue platform (5%): $1,000 in platform fees plus payment processing. Predictable, but the fee scales linearly with your success.
Paid platform with flat pricing: A fixed cost that does not increase as you raise more. If mobile bidding and outbid alerts generate even 10-15% more bids, the additional revenue covers the platform cost and then some.
Organizations that switch from free tools to platforms with mobile bidding, outbid alerts, and instant checkout consistently report 20-40% increases in auction revenue. On a $20,000 auction, that is $4,000-$8,000 in additional funds raised, far exceeding any platform fee.
How to choose the right auction platform
- How many items and bidders? Under 25 items with fewer than 50 bidders, a free tool works. Above that, you need a platform without artificial caps.
- Do you need mobile bidding? If your auction runs during a live event, mobile bidding with outbid notifications is the single biggest revenue driver. Free platforms rarely include it.
- How will you collect payments? Manual collection leads to walkaways and volunteer burnout. Instant checkout is worth paying for at live events.
- One-time or recurring? A one-time classroom auction can run on any free tool. An annual gala raising $20,000 or more deserves a platform that maximizes revenue.
- Does the auction connect to your other fundraising? If your auction is part of a larger strategy, a platform like momoGood that connects bidder data to your CRM and donor management is worth more than an isolated tool.
For catalog inspiration, see our silent auction ideas guide and auction item ideas roundup.
Get the full 2025 Texting Insights Report
138 million messages analyzed. See the benchmarks, timing data, and ROI insights top nonprofits use.
Download the report →FAQs
What is the best free online auction site for nonprofits?
For a genuinely free tool, 32auctions offers unlimited items without a platform fee on its free tier. Auctria offers a free plan for events under 25 items. Both require manual payment collection. If you want mobile bidding, outbid alerts, and instant checkout, paid platforms like momoGood deliver significantly higher auction revenue that more than covers the platform cost.
Can I run a silent auction for free?
Yes. Platforms like 32auctions and Auctria offer free tiers for basic silent auctions. The tradeoff is limited features: no mobile bidding, no instant checkout, no outbid push notifications, and no real-time support. For events where maximizing revenue matters, the limitations of free platforms typically cost more in lost bids than a paid platform would charge.
How much do online auction platforms cost?
Pricing varies widely. Free tiers exist at 32auctions and Auctria. Mid-range plans run $150-$400 per event. Enterprise platforms like OneCause and GiveSmart use custom pricing with annual contracts. momoGood offers custom pricing without multi-year contracts. Standard credit card processing fees (2.9% plus $0.30 per transaction) apply on nearly every platform.
Do free auction sites take a percentage of sales?
Some do and some do not. 32auctions does not charge a percentage on its free tier. BetterUnite charges approximately 5% of funds raised. Auctria does not take a percentage but caps items at 25. Always calculate total cost including platform fees, percentage-of-revenue charges, and payment processing fees together.
What features matter most for online auction fundraising?
Mobile bidding with outbid notifications is the single highest-impact feature, consistently driving higher average bids and better sell-through rates. After that, instant checkout is the next most valuable, reducing walkaways and volunteer hours spent chasing payments. For deeper auction strategy, see our silent auction ideas guide.
Run your next auction on momoGood.
Mobile bidding, outbid alerts, instant checkout, and AI-powered fundraising tools — everything your auction needs to raise more.