Yes, as of April 2018, you can now apply with a co-borrower for a SoFi Personal Loan.
While adding a co-borrower is not required, it may help you qualify for a loan or qualify for a lower interest rate. However, both borrowers will be jointly responsible for repaying the loan.
In addition, the review process with a co-borrower may take an extra one to two weeks. Please note that co-borrowers must live at the same address as the primary applicant.