Best RSVP Tools
Best Free RSVP Tools for Nonprofits & Charities
Compare free RSVP tools built for nonprofit fundraisers, volunteer days, and donor events. We tested 5 options — here's what actually works when your budget is zero.
You're running a fundraising gala next month, a volunteer day the week after, and a donor dinner. Your budget for event tech is basically zero. You need to track who's coming, send reminders so people actually show up, and ideally have a record of attendance for grant reporting. We've tested the 5 best RSVP tools for nonprofits — here's which ones actually work when you're juggling limited resources and high stakes.
How we evaluated each tool:
Ease of setup
Can your team create an event in under 5 minutes without training?
Attendee friction
Will volunteers and donors actually RSVP, or will they abandon the process?
Automatic reminders
Does it reduce no-shows without manual follow-up from your team?
Attendance tracking
Can you record who actually attended for grant reporting and donor records?
Cost for nonprofits
Is it actually free, or are there hidden fees that eat into your budget?
Free RSVP built for nonprofits and community organisers
Who's In is built specifically for nonprofits running volunteer days, fundraisers, and donor events on zero budget. Attendees click a link — no account, no app, no friction. You get automatic 48-hour reminders to reduce no-shows, attendance tracking for grant reports, and capacity management for ticketed fundraisers. Everything is free forever.
Pros
- Completely free — no hidden fees or payment processing charges
- Volunteers and donors RSVP with one click, no account needed
- Automatic 48-hour reminders reduce no-shows by up to 40%
- Attendance tracking for grant reporting and donor records
- Capacity limits and waitlist management for gala ticketing
- Works on phones — critical for reaching volunteers via text
- Data stays with you, not locked in a platform
Cons
- Focused purely on RSVP — not a full fundraising or CRM platform
Event ticketing and discovery platform
Eventbrite works for large public fundraising events where you want to reach new donors outside your existing network. But the 3.7% + £0.49 per ticket fee eats directly into nonprofit fundraising. Attendees must create an account to RSVP, which adds friction for older donors and volunteers.
Pros
- Good for reaching new donors beyond your email list
- Handles payment processing automatically
- Professional branding builds trust for major galas
Cons
- 3.7% + £0.49 fee per ticket reduces fundraising net
- Attendees must create an Eventbrite account to RSVP
- Higher friction barrier for older donors and volunteers
- Overkill and expensive for volunteer coordination
- Data lives on Eventbrite, not in your nonprofit systems
Community group discovery platform
Meetup is good if you're running recurring community outreach programs and want to attract new volunteers searching for groups in your area. But the $24-35 monthly cost adds up, and requiring attendees to create Meetup accounts creates friction for your existing donor and volunteer base.
Pros
- Good for discovering new volunteers in your city
- Built for recurring community programs
- Large active user base of community volunteers
Cons
- Monthly cost ($24-35) adds up — £300/year isn't 'free'
- Attendees must create a Meetup account, adding friction
- Less useful for one-off fundraisers or donor events
- Poor attendance tracking for grant reporting
- Monthly cost may be difficult to justify to nonprofit board
Free form builder
Google Forms is free and your team likely already knows how to use it. But it wasn't designed for event RSVPs. You'll manually chase down responses, send reminders yourself, and have no way to track actual attendance vs. RSVPs. For volunteer coordination and grant reporting, this creates extra work you don't have.
Pros
- Free and familiar to nonprofit staff
- Simple to create and share
- Integrates with Google Sheets for data tracking
Cons
- No automatic reminders — staff must manually chase attendees
- No capacity management or waitlist
- Attendees get no confirmation or RSVP experience
- High no-show rate because attendees forget about the event
- No attendance tracking — can't distinguish RSVPs from actual attendees
- Extra manual work for grant reporting
- Unprofessional for donor and gala events
Social media event management
Facebook Events works well for promotion if your donor and volunteer base is on Facebook. But the "Interested" and "Going" buttons are notoriously unreliable — you'll typically see 3x the "Interested" signals vs. actual attendees. This makes capacity planning and volunteer scheduling impossible.
Pros
- Free
- Good reach if your donors and volunteers use Facebook
- Easy to share and boost
Cons
- Unreliable attendance signals — 3x overestimation of attendance
- No way to distinguish "interested" from confirmed RSVPs
- No RSVP deadline or deadline enforcement
- No waitlist management for ticketed events
- Declining relevance for younger volunteers
- Poor for grant reporting since attendance is unclear
- Can't use for volunteer scheduling due to low reliability
Our verdict for nonprofit organisers
For nearly all nonprofits — whether you're running volunteer days, fundraising galas, donor dinners, or awareness campaigns — Who's In is the obvious choice. It's free forever, requires zero setup time, and eliminates the friction that stops volunteers and donors from RSVPing. You get automatic reminders that actually reduce no-shows, attendance tracking for grant reports, and capacity management for ticketed events. Eventbrite only makes sense if you're running a large public gala with external ticket sales and can justify losing 3.7% to fees. For everything else, Who's In saves your nonprofit time, money, and the headache of manual follow-up.
Frequently asked questions
What's the best free RSVP tool for nonprofits with no budget for event tech?
Who's In is free forever and built specifically for nonprofits. No monthly costs, no payment processing fees, no hidden charges. You get automatic reminders, attendance tracking for grant reports, and capacity management — all without paying a single pound.
How do I reduce no-shows at volunteer days and donor events?
Automatic reminders are the single biggest factor. Who's In sends a 48-hour reminder to everyone who RSVP'd, which typically reduces no-show rates by 30-40%. Combined with a confirmed RSVP (vs. a vague Facebook "Interested"), your attendance prediction becomes reliable for volunteer scheduling and catering.
Can I track attendance for grant reporting?
Yes. Who's In lets you mark attendees as "Attended" when they arrive, so you have a clear record of who actually came to your volunteer day or fundraiser. This is essential for grant reporting and donor impact tracking — Google Forms and Facebook Events don't offer this at all.
Do my volunteers and donors have to create accounts to RSVP?
No. With Who's In, attendees click a link and RSVP in one tap — no account creation, no app download, no friction. This is critical for older donors and busy volunteers who will abandon signup forms. Eventbrite and Meetup both require account creation, which significantly reduces your RSVP rate.
Is there a monthly cost or fee per attendee?
Who's In is completely free — no monthly subscription, no per-ticket fees, no payment processing charges. Your entire fundraising amount goes to your cause, not to event platform fees.
Ready to collect RSVPs for your Nonprofit Events events?
Who's In is free, takes 2 minutes to set up, and requires no app download for attendees.
