Mastodon has said it will pay $2bn for Twitter and Facebook, following a successful initial public offering in the US.
The news comes after Mastodon, which launched in 2014 as a community of musicians and fans, raised $2.2bn (£1.6bn) in a Series A round in September.
Mastodon’s acquisition of Twitter and Instagram will provide the social network with an extra $2 billion a year, according to the company.
Twitter, a social network built by Twitter Inc, has grown to become the most popular news app in the world with more than 1.5 billion monthly active users.
Instagram has also expanded its reach and attracted a number of celebrities and brands, including Beyoncé, Rihanna, Drake and Madonna.
Twitter has been the subject of numerous investigations, with some of the most recent being launched by the US government last year.
“We have a great partnership with Twitter, and this acquisition of Mastodon will help us create a new and innovative social media platform that will make it easier for people to share their ideas and share their stories,” Mastodon co-founder and chief executive Dave Cheney said in a statement.
“We are excited about the opportunities this acquisition will bring to our business.”
Twitter and Mastodon said Mastodon would be led by the company’s new chief executive, Chris Lattner, who previously worked at Facebook.
Lattner is the first person to head up the social media company, which Mastodon founded in 2014.
Facebook said it was excited to join Mastodon as a strategic partner, adding: “Mastodons leadership will be focused on making the Mastodon platform as great as it can be, both as a service and as a platform for community engagement.”
Mastodon is owned by Twitter.
Shares in Mastodon rose nearly 3 per cent on Thursday, after the news broke.
On Wednesday, Mastodon raised $1.2 billion in a $3bn Series A funding round led by Tiger Global Management, and the company said it would use the money to expand its business and expand its presence.