Compass has had enough with Zillow's efforts to force real estate listings to be posted on their platform or else.

Real estate brokerage company Compass has filed a lawsuit against Zillow, claiming the popular real estate website is refusing to accept home listings for properties that have been initially advertised for sale elsewhere.

Compass has officially brought a long-simmering real estate dispute into the courtroom. On Monday, the real estate brokerage sued home-search website Zillow, accusing it of engaging in an anticompetitive conspiracy to maintain its dominance over digital home listings.