FUEL CYCLE by Passenger - Think Passenger builds online platforms that allow brands to connect, create and communicate with key stakeholders.

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

Mobilize - Mobilize is a scalable messaging app built for large groups.

Event Hunt - Startups and Tech Events Curated By Locals

Higher Logic - Private, secure online communities that stimulate conversation and ignite engagement.

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