Real estate tech firm Knock raises $400M

Knock, a startup that helps customers find a new home, has received a $400 million investment to support a national expansion plan and hiring spree.

The New York-based company received new funds in a Foundry Group-led series B financing round. Knock expects to use the capital to double its 100-person headcount.

Other investors who participated in the effort include Company Ventures and existing investors RRE Ventures, Corazon Capital, WTI and FJ Labs.

Sean Black, co-founder and CEO of Knock,…