Drama heats up between dating apps.

Tinder, which belongs to Match Group, sues its competitor Bumble, alleging patent infringement and intellectual property abuse.

The lawsuit alleges that Bumble “copied the principle of mutual acceptance of Tinder, which changes the world and which is based on the map.”

It’s complicated because Bumble was founded by CEO Whitney Wolfe, who was also co-founder of Tinder. She ended up suing Tinder for sexual harassment.

Yet, Match did not let history prevent it from trying to buy Bumble hotter than hot. As emphasized by Axios’ Dan Primack, this lawsuit may actually try to force the hand for an agreement.

(This would not be the first time that a dating site would pursue another one and buy it.) JDate did it with JSwipe.)

I have, uh, tested both Tinder and Bumble and they are similar. Both allow you to glide on nearby users with limited information like photos, age, school and employer. And users can only discuss if both opt-in.

However, Tinder has developed more reputation as a “hookup” app and Bumble does not seem to have the same image, largely because it requires women to initiate the conversation, thus setting the tone.

We asked the companies’ opinion.