Talk about a Tinder date gone wrong.

Female-friendly dating app Bumble is suing Tinder’s parent company, Match Group, for $400 million, claiming that Match not only stole its trade secrets after courting it in merger talks, but also bad-mouthed Bumble in a nasty lawsuit after negotiations fizzled.

That was after Bumble rebuffed Match’s $450 million buyout offer last year, dismissing it as a lowball bid, according to Bumble’s suit filed Wednesday in Texas state court.

Two weeks earlier, meanwhile, Match had sued Bumble, accusing it of trying to copy Tinder’s features “and build a business entirely on a Tinder clone, distinguished only by Bumble’s women-talk-first marketing strategy.”

The dating conglomerate accused Bumble of copying Tinder’s “world-changing, card-swipe-based, mutual opt-in premise” and said Bumble poached two Tinder employees to steal confidential features.

Bumble countered in its Wednesday suit that Match’s legal action was a baseless attempt to harm Bumble by scaring away potential investors. Bumble also said that during the acquisition talks Match induced the production of confidential information solely for “the financial benefit of its dating app businesses.”

Bumble was founded by Whitney Wolf Herd, a co-founder of Tinder who left the company in 2014 to start her female-oriented dating app. That was after she reportedly won a $1 million settlement over sex-harassment allegations against Tinder co-founder Justin Mateen.

Both Tinder and Bumble allow users to swipe right or left to signal their interest or lack of it in meeting prospective partners. Unlike Tinder, conversations on Bumble between heterosexual matches can only be initiated by women.