Six women who were drugged and raped or sexually assaulted by the same Denver cardiologist filed a lawsuit against Match Group Tuesday, accusing the world’s largest dating app company of “accommodating rapists across its products” through “negligence” and a “defective” product.

The women, backed by four law firms, said that by allowing known abusers like Stephen Matthews to remain on its apps, Tinder and Hinge, even after they are reported for rape, the company fostered a breeding ground for “sexual predators.”