How can my guests add themselves to the rsvp without us having to send invites or input their names in the guest list?

Hi Mary! This isn't possible on WeddingWire's platform - you'll need to add each guest individually by name (including plus ones as "Smith Guest") in order for them to RSVP!

If you have more questions please reach out to our Customer Support Team at help@weddingwire.com.

Mary, I sent you a message

Theknot.com rsvp tool allows this for plus-ones. But you’d have to know the primary guest’s name, so they could search for their name and then add their plus one’s name in.
Another option is to use postable.com which is a great tool for information gathering. You just need their phone number or email, and they input their info and their spouse’s info, address etc in. From there you can use that info for your invites and RSVPs

View Quoted Comment Hi, follow up question! Do I have to have the addresses in the guests information on wedding site for them to be able to rsvp or can I just input their name? Hope to hear from you, thanks!

View Quoted Comment

You just need to have their name on your guest list for them to be able to RSVP!!

View Quoted Comment Awesome thanks! How does it work with plus ones that I don’t really know their names? Like say I put in someone’s just first name, would that work or no? Thanks!

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Here's how I'd recommend adding them! If you are giving "John Doe" a plus one, add their plus one to the guest list as "Guest Doe" - that way when John Doe searches his last name to RSVP both guests will show up!