RSVPify

RSVPify in Chicago offers is an event registration and ticketing platform, which the vendor states drives millions of events for companies, couples, non-profits, and event planners around the globe. It enables users to create custom online RSVPs, and restrict respondents to a guest list, add invite-only Secondary Events, collect detailed information with custom questions, embed RSVPify on a 3rd-party website, create seating charts, and customize a guest's RSVP experience with settings and design options.

RSVPify starts at $24.