Credit Karma, a site that lets users get free access to their credit scores in exchange for receiving targeted ads, has raised $1.5 million worth of a $2.5 million round of funding, per an SEC filing. The company said QED Investors led, with participation from Ron Conway’s SV Angel, Founders Funds’ FF Angel and private investor Aydin Senkut; the site raised just over $2.2 million in previous rounds.

Founded in 2007, S.F.-based Credit Karma matches users with credit offers, loans and other financial products based on their credit scores; the site also offers tools like loan payment calculators, as well as message boards and credit-related news. It uses TransUnion’s data to power the credit scores. CEO and founder Kenneth Lin previously ran online campaigns for companies like Upromise and E-LOAN.

• Confirmed: Intuit Buys Mint.com For $170 Million