Elon Musk will not sit aside while Meta’s new killer app Threads amasses tens of millions of users. A potential legal battle looms.

Twitter is considering sueing Meta over “systematic, willful, and unlawful misappropriation of Twitter’s trade secrets and other intellectual property,” a leaked letter by Musk’s lawyer Alex Spiro reveals.

“Competition is fine, cheating is not,” Elon Musk tweeted.