WASHINGTON — BerlinRosen Holdings has bought Boston-based tech shop Inkhouse.

Inkhouse, founded in 2007 by CEO Beth Monaghan, has more than 140 people in offices across seven cities.

The firm works in sectors including technology, AI, healthcare, education, venture capital, climate tech and consumer clients among others. Clients include Databricks, Dialpad, ForgeRock, Harvard University’s Saul Zaentz Early Education Initiative, Incredible Health, The Markup, Raytheon, VMware, Xerox and ZwitterCo.

"As we sit at the cusp of the next phase of technological advancement — AI, climate tech, healthcare, space and more — this is a moment to invest in our future with new capabilities and partnerships to anticipate what’s next. It would be difficult to overstate my admiration for what BerlinRosen is building,” Monaghan said.

The investment in Inkhouse is the latest step in BerlinRosen’s rapid expansion, bringing the agency’s collective size to more than 600 staffers in the US and Europe. Over the last year, Berlin Rosen has made majority investments in Derris, Glen Echo Group, M18 and Onward. It also has opened a new office in Amsterdam.