Capacity control

Stop responses when full.

Use Google Forms' native response limit for a simple total cap. Use FormGuard when the full-form workflow also needs choice quotas, owner alerts, waitlist messaging, and a repeatable pre-launch test.

Close rule Capacity 100 responses Fallback Waitlist link Owner alert Enabled

This form is now full. Please use the waitlist link if you still need help.

Quick answer

Google Forms now supports native form-level response limits. If that is all you need, start there. Use FormGuard when capacity control also needs choice quotas, owner alerts, waitlist messaging, or a guided copied-form test.

Three-part setup

1Set the cap

Choose the response count that should close the form, using native Google Forms for a simple total limit.

2Write the message

Tell late visitors whether the form is full, closed, or moved to a waitlist.

3Notify the owner

Alert the operator when capacity is reached.

Good fit and boundary

Good fit

RSVPs, workshops, classes, volunteer forms, and internal signups with lightweight capacity limits.

Boundary

Google Forms is not a strict reservation, ticketing, payment, or inventory system. Use buffers for high-demand signups.

Next step

FAQ

Can Google Forms stop responses when full?

Yes for simple form-level limits: use the native Google Forms response limit. Use FormGuard when the workflow needs choice quotas, owner alerts, waitlist messaging, or a guided add-on setup.

Can I show a message after the form is full?

Yes. Use a closed-form message with one clear next step, such as a waitlist link.

Does this prevent all overbooking?

No. Google Forms is not transactional, so high-speed submissions may still need a buffer and manual confirmation.