SignUpGenius

SignUpGenius provides sign-up sheets, fundraisers, event ticketing, dues and fee collection, peer-to-peer fundraising, online stores, forms and waivers, and group gift coordination for organizers and volunteer groups. It states that more than 70 million people use the platform, with examples including Stanford University coordinating 350 volunteers and raising $250,000, the Dallas Cup organizing 25 committees and 3,000 volunteers, and the Head of the Hooch Regatta coordinating 500 volunteers across 8,000 volunteer hours.

Advertising on the site runs through programmatic display advertising. Its ads.txt lists 61 ad systems, and Freestar is named as a sales house.