Lanyrd VS Mixily

Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.

Calendify - Calendify is an event community where you can share, publish, and subscribe to event calendars. It helps you to stay informed about what you are interested in and what is yet to come.

Eventbrite - Discover Great Events or Create Your Own & Sell Tickets

Meetabit - All the local tech and startup meetups in one place - easy to organize & attend

Cvent - Cvent's event management software provides event planners with a complete solution to increase event attendance and decrease event costs.

Picatic - Picatic encourages event organizers to create a custom website, sell tickets and then determined their cost of use. Selling out events is easy with Picatic.