LogLogic, which helps companies collect and report on IT log data, has raised $13.5 million in a fourth round of funding.

The funding was led by Focus Ventures and also included Sequoia Capital, Telesoft Partners, Worldview Technology Partners and Invesco Private Capital It brings LogLogic's total funding to $47.7 million.

The company says it can help companies manage logs for firewalls, routers, servers and applications. LogLogic is the largest independent vendor in the "log management" market, which is growing due to new mandates and regulations such as the Payment Card Industry Data Security Standard, as well as a need to lower costs through automated tracking. LogLogic added 160 customers last year, bringing its total customer base to more than 400. Since its founding in 2002, the company has grown by more than 100 percent each year.

LogLogic also claims to differentiate itself from competitors through its open management platform, which allows other companies to design their own applications.