Sarah Selim

UrbanSitter, Inc. operates a community match service for parents and babysitters who connect online through Facebook and existing networks. Its site enables parents to search, book and review trusted sitters within minutes. The firm helps parents to see profile pictures and video of sitters and availability, hourly rates and typical response times are also outlined. The company was founded by Andrea M. Barrett, Hadar Wissotzky, Lynn Perkins, and Daisy Downs in 2011 and is headquartered in San Francisco, CA.

City Year, Inc. offers school-based service and leadership programs. It support students by focusing on attendance, behavior, and course performance through in-class tutoring, mentoring, and after school programs that keep kids in school and on track to graduate. The company was founded by Miuchael Brown, Alan Khazei, Jennifer Eplett Reilly and in 1988 and is headquartered in Boston, MA.

The Thiel Foundation awards grants to groups that empower people to improve their lives, champions organizations and individuals who expose human rights abuses and authoritarianism. It programs include The Thiel Fellowship, Breakout Labs and Imitatio. The company is headquartered in San Francisco, CA.

Wikimedia Foundation, Inc. operates online collaborative wiki projects. The firm is a nonprofit charitable organization dedicated to encouraging the growth, development and distribution of free, multilingual, educational content, and to providing the content of wiki-based projects to the public free of charge. Its projects include Wikipedia, Wiktionary, Wikiquote, Wikibooks, Wikisource, Wikimedia Commons, Wikispecies, Wikinews, Wikiversity, Wikimedia Incubator, and Meta-Wiki. The company was founded by Jimmy Donal Wales in 2003 and is headquartered in San Francisco, CA.