Apto sells a contact management system for keeping track of leads and deals, and for administrative tasks like invoicing. The company advertises a package starting at $90 per month.
The company moved its headquarters from Houston to Denver in 2015.
Founded in 2012, Apto has raised nearly $9 million, according to SEC filings. Last year, it was one of 15 Colorado companies to make the Inc. 500 list, growing 2,079 percent over three years with an annual revenue of $2.2 million.