Startup building software that helps airlines upsell customers raises $25M by Nate Bek on July 19, 2022July 19, 2022 at 12:54 pm Gordian Software, which builds tech that helps airlines and travel websites upsell customers with add-on features, raised $25 million. The Bellevue, Wash.-based startup was founded in 2017 by Stephen Grabowski… Read More