The Election Security Project is a left-of-center advocacy project of New Venture Fund, a nonprofit controlled by the for-profit consulting firm Arabella Advisors.  It is unclear if “Election Security Project” has existence other than as a trade name of NVF. 
The New Venture Fund’s trade name for the Election Security Project will expire on April 1, 2021.  The New Venture Fund has more than 30 registered trade names, some operating as functioning semi-independent groups with a staff and website. Others seem to be only a registered name.
The Arabella Advisors nonprofits are sponsors of nominal advocacy groups. These groups have a website and are established to affect a particular issue, and then disappear. 
New Venture Fund
For more information, see New Venture Fund.
The New Venture Fund is a fiscal sponsorship that makes grants to various left-of-center advocacy organization. The NVF has focused on social and environmental activism. It has issued grants for global health, disaster recovery, education, and the arts. 
The New Venture Fund is the largest nonprofit in the network of four nonprofits created and managed by Arabella Advisors. The other nonprofits are the Hopewell Fund and the Windward Fund, both 501(c)(3) organizations, and the Sixteen Thirty Fund, a highly politically active 501(c)(4). 
A January 2020 profile of Arabella Advisors’ network by Inside Philanthropy noted that the company “handles over $400 million in philanthropic investments and advises on several billion dollars in overall resources.”