Who made tic-tok?

TikTok (Chinese: 抖音; pinyin: Dǒuyīn) is a Chinese video-sharing social networking service owned by ByteDance. It was launched in September 2016 as a Chinese-language app under the name Douyin, and later launched internationally in 2017 as TikTok. TikTok allows users to create and share short videos, with various features such as filters, effects, and music.