Shanghai-based Xiaohongshu, or RedNote as it is known in English, is a Chinese social media platform growing in popularity as an alternative to TikTok, but with the same security risks.

“It’s not a foregone conclusion that RedNote will suddenly enjoy TikTok’s success and popularity,” Gorman said. “Actually gaining the traction TikTok has is rare. And the size of the national security threat is really proportional to the size of the user base.”

When U.S. users try and use the app, it pauses and they're greeted with the following message: "A law banning TikTok has been enacted in the U.S. Unfortunately, that means you can't use TikTok for now.

TikTok’s app and website effectively shut down in the United States late Saturday just before a nationwide ban against the video-sharing platform came into force. The company showed its millions of American users a pop-up message that thanked President-elect Donald Trump for indicating he will work with the company on a solution when he takes office on Monday.

The court held that the risk to national security posed by the app's ties to China overcomes concerns about limiting speech.

Update: Supreme Court upholds law that could ban TikTok in the U.S. Read more. The start of the weekend marks two days until the social media platform TikTok could be banned in the United States. TikTok's Chinese parent company ByteDance has until Sunday to sell the platform under federal legislation signed into law by President Joe Biden last spring.