ExactTarget said its revenue grew 52 percent in the first quarter over a year ago and that it closed on $30 million in venture financing to fund operations and do acquisitions.

The Indianapolis marketing software company said the latest round of financing was led by Technology Crossover Ventures of Palo Alto, Calif. The money will be used to “fund key acquisitions, enter new global markets, expand its operations across North America, Europe and Asia Pacific, and further accelerate innovation of its real-time interactive marketing technology,” the company said.

In the past 24 months, ExactTarget bought three companies and added 500 employees.

ExactTarget, which is backed with venture capital, has posted revenue increases in 41 consecutive quarters. It had 2010 revenue of $134 million.