The lawsuit is not the first Facebook has filed this year against a Hong Kong company.
TikTok has hired away more than two dozen employees from Facebook since 2018.
The case is the latest in a series of offensives against Chinese companies found to be injecting malware in apps for financial gain.
Tik Tok was downloaded more than Facebook in the US last month.
Zuck’s small group plan won’t solve misinformation. It will just sweep it under the rug.
Whether Bytedance can make it in the US market is still up in the air.
Facebook said that it would “carefully” consider privacy and free expression.
At 663 million downloads in 2018, TikTok surpassed Instagram and is catching up to Facebook.
The app has seen its installs increase by 237% year-on-year.