Founded in 2010, Mosaic created its initial business model using crowdfunding principals to offer loans for commercial solar development projects.

[4][5] Billy Parish, Dan Rosen, Arthur Coulston, and Steve Richmond originally started Mosaic to facilitate crowdfunding of loans for solar development projects.

[8] In January 2013, Mosaic launched an online platform to let individuals invest US$25 or over in specific solar projects while earning a 4.5% annual return.

[9] Mosaic provided capital to developers at a 5.5% interest rate, took a 1% fee, and investors could expect a full return of their investment in nine years.

In 2019, Mosaic introduced a product to enable the purchase of solar with other bundled improvements, including roofs, windows, and doors.

[16] In 2020, the company introduced a first-of-its-kind sustainable home improvement loan with up to 18 months of deferred interest and payments followed by repayment terms up to 25 years.