Mobilize - Mobilize is a scalable messaging app built for large groups.
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Crowded Communities - The all-in-one community platform.
Bylde - Bylde is a SaaS platform you can use to Start, Manage and Grow your groups and communities.
NationBuilder - The world's first platform for leaders, handcrafted from scratch to help you grow your community and lead them to action.
CitySocializer - Join citysocializer today to have fun with a new local, social crowd ▫ Make the most of your free time, any time ▫ See what groups are doing together in your city and join in ▫ Get invited out by others to do things that match your interests ▫ Meet …