How Social Media Products Emerge and Develop

 TikTok

 is a social media platform that was developed by the Chinese company ByteDance. It was launched in September 2016 under the name Douyin for the Chinese market and later introduced to the international market as TikTok in September 2017. ByteDance is responsible for producing and maintaining TikTok, and the app has gained widespread popularity for its short-form videos and creative content.

ByteDance is a technology company headquartered in Beijing, China, and it has become one of the world's most valuable startups. Besides TikTok, ByteDance is also known for other popular apps and services such as Douyin (the Chinese version of TikTok), Jinri Toutiao (a news aggregation platform), and others.

WhatsApp

 was developed by WhatsApp Inc., an American technology company founded by Brian Acton and Jan Koum in 2009. The messaging app quickly gained popularity for its simple and user-friendly interface, as well as its focus on end-to-end encryption for user privacy. Brian Acton and Jan Koum worked at Yahoo before they decided to create WhatsApp.

In 2014, Facebook acquired WhatsApp for $19 billion, making it one of the largest technology acquisitions in history. However, both Acton and Koum eventually left WhatsApp and Facebook over disagreements related to issues such as user privacy and monetization strategies. Despite their departure, WhatsApp continues to be owned and operated by Facebook, Inc. (now Meta Platforms, Inc.), and it remains one of the most widely used messaging platforms globally.

Telegram 

was developed by Nikolai and Pavel Durov, two brothers of Russian origin. Nikolai Durov is a mathematician, while Pavel Durov is a computer programmer and entrepreneur. They founded Telegram Messenger LLP in 2013, and the messaging app, known as Telegram, was officially launched later that year.

Telegram gained popularity for its emphasis on privacy and security, as well as its features such as secret chats, self-destructing messages, and cloud-based storage. The Durov brothers have been involved in various technology projects, and prior to Telegram, Pavel Durov co-founded VKontakte (VK), a popular Russian social networking site often compared to Facebook.

It's worth noting that the Durov brothers have been associated with a commitment to user privacy and resistance to government interference, and this philosophy is reflected in the design and features of Telegram.

The term "messenger" 

is quite generic and can refer to various messaging apps or platforms. However, if you're referring to Facebook Messenger, it was developed by Facebook, Inc. Facebook Messenger is a standalone messaging app and platform that allows users to send text messages, make voice and video calls, share media, and more.

Mark Zuckerberg, along with his team at Facebook, oversaw the development and launch of Facebook Messenger. It was originally launched in 2011 as a part of the main Facebook app, but later, in 2014, it was spun off into a separate app to provide a more focused messaging experience. Facebook, Inc. continues to own and operate Facebook Messenger.

Twitter 

was co-founded by Jack Dorsey, Biz Stone, and Evan Williams in March 2006. Jack Dorsey played a significant role in the creation of Twitter and served as the company's CEO in its early years. The idea behind Twitter was to create a platform where users could share short messages, known as tweets, with a maximum character limit.

Since its inception, Twitter has become one of the most popular social media platforms, providing a space for real-time communication, news dissemination, and public discourse. Jack Dorsey, Biz Stone, and Evan Williams are the key figures associated with the development of Twitter, and they have played various roles in the company over the years. Jack Dorsey, in particular, has been involved in multiple technology ventures and has had a significant impact on the development of Twitter. Please note that leadership roles and key figures may change over time.