2 of 5
Cost: One-time fee starting at $35
Standout feature: As its name suggests, this service simultaneously builds an app based off your desktop design, meaning guests can download it to instant-message one another.
3 of 5
Cost: Free, but a $7/month upgrade gets you more bells and whistles
Standout feature: Ask guests where you should honeymoon, or test them on how well they know you. There are polls and quizzes galore.
4 of 5
Cost: Free for basic service; $15/month includes more themes plus a personalized domain name
Standout feature: Some of the most sophisticated and beautiful templates out there, with what seems like limitless ways to customize each one.
5 of 5
Cost: Free; more options for a one-time fee of $20
Standout feature: Integrates your Facebook profile and those of guests, who can then get to know one another before the wedding.