You can RSVP to an online event using a number of online tools such as Facebook Events, Eventbrite, Upcoming and Evite, depending on the tool the organizers choose. These online RSVP tools allow you to choose yes, maybe or no options to inform organizers whether or not to expect your participation in an online event.
RSVP tools help organizers to get a headcount of attendees, gather information, enter the details into a database and send follow up emails. Evite is a simple tool that allows you to respond to an invitation to an online event by selecting yes, no or maybe. It also allows you to see the total number of people attending. Upcoming also allows you to publicly state whether you are attending an event or not. You can comment on the event and see who among your friends is attending.
Facebook events uses the social network to help people respond to invitations. The organizer creates a page with information on a specific event, and invites potential attendees. You can select yes, no or maybe, and you can even write on the event's wall. You may receive reminders as the event date draws closer. Eventbrite is ideal for both free and paid online events. If the event requires you to pay, you can do so securely using your debit or credit card or using online payment processors such as PayPal.