Bluesky has added almost a million users one day after opening to the public

Bluesky, the open source Twitter alternative, has seen a surge in new users just one day after opening its platform up to the public. The service has gained more than 850,000 users bringing its total sign-ups to just over 4 million.

The service had been in an invitation-only beta for about a year and had grown to just over 3 million users when it officially opened to the public. It currently has close to 4.1 million sign-ups, according to an online tracker. “Things are rolling over here,” Bluesky CEO Jay Graber wrote in a post on X.

The surge in new users suggests that there is still ample curiosity about the Jack Dorsey-backed platform that began as an internal project at Twitter in 2019. It also indicated that Meta hasn’t entirely cornered the market for a text-based Twitter alternative. The company’s Threads app has grown to 130 million monthly users, Meta announced last week.

Graber has said that Bluesky intended to grow at a slower pace so that it could build it the platform, and the underlying protocol, without the added pressure sudden surges in growth can cause. Some of those concerns were borne out over the last day as the spike in activity led to some technical issues on the site, including problems with the app’s custom feeds and a brief outage overnight. The outage was resolved within a couple hours, according to the company.

Much of Bluesky’s future success will hinge on whether it can maintain new growth and keep the interest of all its new users. Threads also saw an initial spike in new users, only for it to drop-off before eventually rebounding.

Though Bluesky may look a bit like Threads or X, it’s a fundamentally different kind of platform and part of the growing movement for decentralized social media. Its open-source protocol functions like a “permanently open” API, according to Graber, and the site already has dozens of developers building their own experiences. Bluesky also offers more customization features for users, with features like custom algorithms and the ability to choose your own content moderation settings.

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