ByteDance launched Douyin in China, first under the name A.me, then renamed Douyin later in 2016. The app’s short, vertical videos and swipe-based feed became the model for TikTok’s later international rollout.
ByteDance launched TikTok as the overseas version of Douyin, marking the start of TikTok’s global expansion strategy. This created two parallel apps—Douyin for China and TikTok for the rest of the world—operating separately even though they look similar.
ByteDance bought Musical.ly, a popular lip-sync video app with a large teen user base outside China. The acquisition gave ByteDance an established international community and helped accelerate TikTok’s growth in the U.S. and Europe.
TikTok and Musical.ly were merged into one app, and users’ existing accounts and data were consolidated under the TikTok name. This merger helped turn TikTok into a single global platform (outside China), combining TikTok’s feed design with Musical.ly’s creator community.
U.S. regulators said the app (then known as Musical.ly/TikTok) violated COPPA, a U.S. children’s privacy law, by collecting personal information from kids under 13 without proper parental consent. The settlement pushed TikTok to change its approach to age-related protections and children’s accounts.
India announced a ban on TikTok and dozens of other Chinese-linked apps, citing security and privacy concerns during heightened India–China tensions. Because India had been one of TikTok’s largest markets, the decision became a major example of how geopolitics could quickly reshape platform access.
President Donald Trump signed an executive order directing the U.S. government to prohibit certain transactions with ByteDance, citing national security concerns. This was an early peak in U.S. regulatory pressure and helped set the stage for later divestment demands and court challenges.
A separate order required ByteDance to divest interests tied to TikTok’s U.S. operations, based on a national security review by CFIUS (the U.S. committee that reviews foreign investments). The order framed TikTok’s U.S. data and ownership structure as a key government concern.
TikTok launched Stitch, a tool that lets users clip part of another person’s video and incorporate it into their own. Along with Duets, Stitch encouraged “remix” culture—content that responds to, explains, or challenges another video—shaping how trends and commentary spread on the platform.
TikTok named Shou Zi Chew as CEO, after a period of leadership turnover during intense U.S. political scrutiny. The appointment signaled a focus on managing global growth while responding to regulatory and trust challenges, especially around data handling and security.
President Joe Biden revoked and replaced several Trump-era executive orders that had sought to block transactions with TikTok and other foreign-linked apps. The shift did not end U.S. security concerns, but it changed the approach from immediate bans toward broader, ongoing reviews and criteria.
TikTok announced it had reached 1 billion monthly active users, showing that the app had become a major global social platform. The milestone helped confirm that short-form video was no longer niche and pushed competitors to expand similar products.
The U.S. enacted the No TikTok on Government Devices Act, prohibiting TikTok on federal government devices. The law reflected growing concerns about cybersecurity and foreign-linked apps in government settings, and it helped spur similar restrictions elsewhere.
The European Commission told staff to remove TikTok from corporate devices and some personal devices connected to Commission systems, citing cybersecurity concerns. The move signaled a wider European shift toward treating TikTok as a security and governance issue, not only a media platform.
Ireland’s Data Protection Commission fined TikTok €345 million after an inquiry focused on how the platform handled children’s data, including default settings and transparency during the reviewed period in 2020. The decision showed how TikTok’s growth brought stronger enforcement under EU privacy rules and increased pressure to redesign safety and privacy defaults.
TikTok's global expansion, platform features, and regulatory challenges (2016–2023)