NationBuilder
NationBuilder’s mission is to build the technological, educational, and community infrastructure for a world of creators by helping leaders develop and organize thriving communities. Leaders of campaigns, parties, brands, nonprofits, advocacy groups, and universities use NationBuilder software to grow their communities and drive their people to action. Since its launch in 2011, our software has served more than 150,000 leaders in over 100 countries around the world.
https://nationbuilder.com/