What is Bluesky? Everything to know about the X competitor

Is the grass greener on the other side? We’re not sure, but the sky is most certainly bluer. It’s been two years since Elon Musk purchased Twitter, now X, leading people to set up shop on alternative platforms. Mastodon, Post, Pebble (two of which have already shuttered operations) and Spill have been presented as potential replacements, but few aside from Meta’s Threads have achieved the speed of growth Bluesky has reached.

As of February 2025, Bluesky has surpassed 30 million users. Its growth stems from several policy changes at X, including a heavily criticized change to the block feature and allowing third party companies to train their AI on users’ posts, which helped the app soar to the top of the U.S. App Store. Bluesky also saw a big boost following the results of the 2024 U.S. presidential election (which also contributed to an X exodus by Taylor Swift fans). But while the number is promising, the growth has slowed — and the network has a lot of catching up to do to compete with Threads’ 275 million monthly active users.

Below, we’ve compiled the answers to some of the most common questions users have about Bluesky. And if you’ve made the switch, you can follow TechCrunch here as well as our team with our Starter Pack.

What is Bluesky?

Bluesky is a decentralized social app conceptualized by former Twitter CEO Jack Dorsey and developed in parallel with Twitter. The social network has a Twitter-like user interface with algorithmic choice, a federated design and community-specific moderation.

Bluesky is using an open source framework built in-house, the AT Protocol, meaning people outside of the company have transparency into how it is built and what is being developed.

Dorsey introduced the Bluesky project back in 2019 while he was still Twitter CEO. At the time, he said Twitter would be funding a “small independent team of up to five open source architects, engineers, and designers,” charged with building a decentralized standard for social media, with the original goal that Twitter would adopt this standard itself. But that was before Elon Musk bought the platform, so Bluesky is completely divorced from X.

As of May 2024, Dorsey is no longer on Bluesky’s board. Bluesky is now an independent public benefit corporation led by CEO Jay Graber.

How do you use Bluesky?

Upon signing up, users can create a handle which is then represented as @username.bsky.social as well as a display name that appears more prominent in bold text. If you’re so inclined, you can turn a domain name that you own into your username — so, for example, I’m known on Bluesky as @amanda.omg.lol.