The Someland Foundation, formerly known as the Sara and Evan Williams Foundation, is a left-of-center grantmaking foundation founded and financed by Evan Williams, the billionaire co-founder of Twitter, and his wife, Sarah Williams.
The Foundation keeps a low profile and has no website. In 2018, philanthropic manager Abbey Banks became the Foundation’s executive director. 
Evan and Sara Williams
Evan Williams is a co-founder and original board member of Twitter. He served as CEO for less than a year before stepping down in 2010 to focus on product development. In 2012, he founded the online publishing platform Medium. In the late 2010s, he began steadily divesting his ownership of Twitter, selling 30% in 2017, and almost half of what was remaining in 2018 down to less than 2% of the company.  In 2019, he stepped down from the Twitter board.
Sara Williams was an interior designer for commercial spaces and has served as the president of the Someland Foundation since its establishment.  Together, the Williamses have an estimated net worth of $2.3 billion. 
Evan and Sara have contributed to Democratic PACs, organizations, and candidates. In 2012, Evan donated $10,000 to End the Gridlock, a Democratic PAC.  In 2013, together they gave nearly $100,000 to the Democratic National Committee.  In 2015, Evan donated $2,700 to the Democratic presidential campaign of Lawrence Lessig (D-MA). 
The Someland Foundation is solely funded by contributions from Sara and Evan Williams and the gains from endowment investment. A significant portion of these contributions came in the form of gifted Twitter stock. 
The Foundation was established in 2011 with two donations from Sara and Evan Williams totaling $20 million.  In 2014, they donated another $10 million, in 2015 another $62 million, in 2017 another $29 million, and in 2018 an additional $100 million which largely came from Evan Williams divesting almost half of his 3.9% stake in Twitter.  As of 2018 (the last year tax returns are available), Sara and Evan Williams have given $221 million to the Foundation.
The Someland Foundation primarily funds left-of-center nonprofit advocacy groups. In 2018, the Foundation gave:
- $11 million to the American Civil Liberties Union (ACLU)
- $1.5 million to the Center for Reproductive Rights
- $1.5 million to the Sierra Club Foundation
- $1 million to the National Redistricting Foundation
- $500,000 to the Voter Participation Center
- $450,000 to Nextgen Climate America
- $250,000 to the Barack Obama Foundation
- $200,000 to the Electronic Frontier Foundation
- $25,000 to Neo Philanthropy
The Foundation also funds numerous nonpartisan education organizations, including the Nueva School and 826 Valencia, a nonprofit which supports underfunded students.  In August 2020, the Foundation gave $10 million to the San Francisco Unified School District, which had received funding from the Foundation since 2015. The funds aim to eliminate the “digital divide” between students with and without the infrastructure for online-based education. 
In April 2020, the Foundation gave $50,000 to SF New Deal, a nonprofit providing relief funds to individuals and small businesses in San Francisco impacted by the COVID-19 pandemic. 
In September 2020, the left-of-center grantmaking Libra Foundation announced the creation of a $36 million fund to support Black Lives Matter-aligned organizations. The Someland Foundation has been announced as one of the project’s funders, along with the William and Flora Hewlett Foundation and the JPB Foundation among other left-of-center nonprofits.