Tides Foundation is an American public charity and fiscal sponsor working to advance progressive causes and policy initiatives in areas such as the environment, health care, labor issues, immigrant rights, LGBTQ+ rights, women's rights and human rights. It was founded in San Francisco in 1976. Through donor advised funds, Tides distributes money from anonymous donors to other organizations, which are often politically progressive. It manages two centers in San Francisco and New York that offer collaborative spaces for social ventures and other nonprofits.
Since 1996, Tides has overseen the Tides Center, which is an incubator for smaller progressive organizations. In 2004, Tides formed the Tides Shared Spaces offshoot which specializes in renting office space to nonprofit tenants. As of 2008, the umbrella organization for these entities was the Tides Network.

History
Tides was founded in 1976 by Drummond Pike, who worked with Jane Bagley Lehman, heir to the R. J. Reynolds Tobacco Company fortune. In the chapter entitled "The Givers" in his 2017 publication by the same name, The Givers: Wealth, Power, and Philanthropy in a New Gilded Age, which is a more recent edition of his 2010 book, Fortunes of Change: The Rise of the Liberal Rich and the Remaking of America, David Callahan wrote that Pike was an "entrepreneurial activist" and that Pike and his "wealthy friends" teamed up" to create Tides which "used donor-advised funds to direct resources to progressive causes." Callahan, who is the co-founder of the think tank Demos, contrasted this with a similar approach taken by Donors Trust, an American non-profit donor-advised fund that was founded in 1999 to safeguard the "intent of libertarian and conservative donors".

Lehman served as the chair of the organization from its founding to her death in 1988. Tides was conceived as a nationally oriented community foundation, and founded out of Pike's frustration with established philanthropy's perceived neglect of progressive issues. He envisioned using fiscal sponsorship for progressive political activism. Fiscal sponsorship uses a tax-exempt charity to provide financial support to a non-exempt project or organization, therefore lending it tax exemption as long as the charity retains control of the way its funds are spent. He served as its CEO until he was replaced by Melissa L. Bradley in 2010.

Pike founded a Canadian version of the organization, Tides Canada, in 2000. Tides Canada, which is based in Vancouver, makes grants through its foundation and has a charity that supports environmental and social justice projects. It consists of the Tides Canada Foundation and the Tides Canada Initiatives Society.
By 2009, Tides allocated $75 million per year in donor money, most of which went to fund progressive political causes. In 2011, Tides received about $90 million in funding, and awarded about $96 million to various individuals and organizations.
In 2021, Democratic Senator Sheldon Whitehouse described the Tides Foundation as an instance of "Democratic dark money", which he said mirrored – and had caught up with – similar organizations exercising covert influence on the Republican side.
Services
Tides makes charitable contributions through donor-advised and collective action funds and provides consulting, investment, fiscal management services, and collaborative workspaces for their partners in their New York City and San Francisco offices.
Donations
Organizations that began as projects of Tides include Campaign to Defend the Constitution, Higher Education Recruitment Consortium, People for the American Way, Pew Internet and American Life Project, Rockridge Institute, Social Venture Network, Urgent Action Fund, and V-Day. The Tides website lists 130 current grantees. As Tides is a public charity, it allows sponsors to donate money to different organizations—including for-profit as well as nonprofit entities—through donor-advised funds. Donor-advised funds are funds held in accounts by nonprofit organizations, like Tides, that then make grants to third-party entities on the donor's behalf. Organizations that have partnered with Tides to setup these funds include Girl Rising and the Humble Bundle.
In 2000, Tides launched a program called "Bridging the Economic Divide." It focused on funding living wage campaigns and economic justice coalitions. Tides also launched the Tides Death Penalty Mobilization Fund, which supports the anti-death penalty movement. The Michigan Partnership to Prevent Gun Violence was founded with support from Tides.
Tides has received at least $3.5 million from liberal financier and political activist George Soros.





