Four communications companies are among Inc. magazine’s ranking of the 10-fastest-growing companies in Baltimore.

Promotional items company IVY Services, LLC is ranked No. 5 with $7.1 million in revenue and a three-year growth rate of 245 percent. The company is headed by Vicki Young, president and CEO;

Ranking No. 6 is Groove, the marketing, web design and development agency with 2014 revenue of $4.2 million (194 percent three-year growth rate). Ethan Giffin is CEO;

No. 7 is Planit, the agency headed by Matt Doud and Ed Callahan, with 17.8 million in revenue and a 188 percent three-year growth rate;

The eighth fastest growing company on Inc.’s Baltimore list is Mindgrub, with $4 million in revenue and a 178 percent growth rate. Todd Marks is president and CEO.

Each year, Inc. ranks the fastest-growing private companies in America and publishes its list of the top 5,000.