Credit Karma has begun offering on-demand access to credit reports from Equifax.

San Francisco-based Credit Karma currently offers free credit reports from TransUnion on its personal finance platform. As of Dec. 29, registered users will be able to track and compare credit reports from two national credit bureaus.

"Historically, getting your credit scores or reports from more than one bureau for free on more than an annual basis can be complicated, yet access to this information is critical for consumers" said Ken Lin, Credit Karma's chief executive, in the release.

Credit Karma has 30 million users, according to the release.