Cloudflare ranked TikTok the most popular website of 2021, surpassing. Morning Consult named TikTok the third-fastest growing brand of 2020, after Zoom and Peacock. In October 2020, TikTok surpassed 2 billion mobile downloads worldwide. Since their launches, TikTok and Douyin have gained global popularity. Douyin includes an in-video search feature that can search by people's faces for more videos of them, along with other features such as buying, booking hotels, and making geo-tagged reviews. The two products are similar, but their features are not identical. Their servers are each based in the market where the respective app is available. TikTok and Douyin have almost the same user interface but no access to each other's content. It launched in 2017 for iOS and Android in most markets outside of mainland China however, it became available worldwide only after merging with another Chinese social media service, Musical.ly, on 2 August 2018. TikTok is an entirely separate, internationalized version of Douyin, which was released in the Chinese market in September 2016.

It hosts user-submitted videos, which can range in duration from 3 seconds to 10 minutes. TikTok, also known in China as Douyin ( Chinese: 抖音 pinyin: Dǒuyīn), is a short-form video hosting service owned by the Chinese company ByteDance.

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