Jack Dorsey’s new Twitter alternative, Bluesky, is now available in closed beta on the App Store. The invite-only app could soon join a crowded field of budding Twitter competitors, including Mastodon.Interested users can submit their email addresses to join the waitlist. The Bluesky app reportedly borrows heavily from Twitter. However, it includes minor differences like “What’s up?” in place of “What’s happening?” along with a simplified process of creating a post (which can also include photos) by selecting a plus button. Otherwise, it has familiar features like searching for and following users and viewing their posts on a Home timeline.Bluesky began in 2019 as a Twitter-funded side project. Dorsey, who co-founded Twitter and was still CEO when the initiative started, saw it as a more open alternative to an increasingly centralized Twitter. Then, Bluesky spun off as its own company in 2021. Dorsey has said he believes social media should be free of corporate or gov