How TikTok grew from a fun app for teens into a potential national security threat

TikTok has been around a long time and gradually became powerful since its launch as Musical.ly.

If it feels like TikTok has been around forever, that's probably because it has, at least if you're measuring via internet time. What's now in question is whether it will be around much longer and, if so, in what form?

Starting in 2017, when the Chinese social video app merged with its competitor Musical.ly, TikTok has grown from a niche teen app into a global trendsetter. While, of course, also emerging as a potential national security threat, according to U.S. officials.

On April 24, President Joe Biden signed legislation requiring TikTok parent ByteDance to sell to a U.S. owner within a year or to shut down. TikTok and its China-based parent company, ByteDance, filed a lawsuit against the U.S., claiming the security concerns were overblown and the law should be struck down because it violates the First Amendment.

The Supreme Court on Friday unanimously upheld the federal law banning TikTok, and the popular short form video service went dark in the U.S. — just hours before the ban was set to begin.

Here's how TikTok came to this juncture:

ByteDance is founded in China by entrepreneur Zhang Yimin. Its first hit product is Toutiao, a personalized news aggregator for Chinese users.

Startup Musical.ly, later known for an eponymous app used to post short lipsyncing music videos, is founded in China by entrepreneur Alex Zhu.