Increased sales to larger customers and an expanding international presence helped Interactive Intelligence Group Inc. boost profit and revenue in its latest quarter.

The Indianapolis business-communications software firm on Monday reported second-quarter revenue of $52 million, up 34 percent from the same period last year.

Excluding certain charges, quarterly profit was $6.3 million, or 32 cents per share, beating analysts’ estimates by a penny per share.

In the year-ago period, the company reported profit of $5 million, or 27 cents per share.

“We are executing on our primary strategic initiatives,” founder and CEO Donald E. Brown said in a prepared statement. “We are moving up market with more sales to larger customers, rapidly increasing revenues from our cloud-based solutions, successfully expanding our presence internationally, performing well in our targeted vertical markets, and seeing increased interest in our process automation capability.”

For the first six months of the year, Interactive Intelligence increased revenue 35 percent, to $73.8 million. Profit grew 31 percent, to $14 million.

Interactive Intelligence stock closed Monday at $36.68 per share, its highest closing price since May 2.