What Is Bluesky? A Complete Beginner's Guide

Bluesky is a social network for short public posts that runs on an open standard rather than a company's private rulebook. If you have used Twitter, it will feel immediately familiar: you write posts, follow people, reply, like, and repost. What sits underneath is genuinely different, and that difference is the reason people keep asking what Bluesky actually is. This guide explains it without jargon, covers how it works, and helps you decide whether to join.

Where Bluesky came from

Bluesky started inside Twitter. In 2019, then-CEO Jack Dorsey announced funding for a small independent team to research an open standard for social media, with the idea that Twitter might eventually run on it. The project was spun out as a separate company, and after Twitter's 2022 ownership change, Bluesky continued entirely on its own as Bluesky Social PBC.

The app launched in private beta in 2023, when invite codes became briefly famous as a scarce commodity, and opened to everyone in February 2024. Growth has arrived in waves, usually triggered by policy or product changes at other platforms that pushed people to look for alternatives.

How Bluesky works: the AT Protocol explained simply

The important idea behind Bluesky is that it separates things that are normally bundled together inside one company. On a traditional platform, one organisation controls your identity, stores your data, decides what your feed shows, and sets moderation rules. On Bluesky those are separate layers built on the AT Protocol.

In practice this means three things that matter to ordinary users:

• Your identity is portable. Behind your handle sits a permanent identifier called a DID. Your handle is just a readable alias pointing at it, which is why you can change your handle, or move your account to a different hosting provider, without losing followers or posts.
• Your feed is a choice. Because the algorithm layer is separate, anyone can publish a feed, and you subscribe to the ones you want. There is no single hidden algorithm deciding what everyone sees.
• Your data is public and addressable. Public posts live in an open repository that other apps can read, which is why an ecosystem of third-party clients and tools exists at all.

You do not need to understand any of this to use Bluesky. It matters because it explains why Bluesky behaves differently from platforms that look similar. If you want the deeper version, we cover it in what the AT Protocol is and why it matters.

What using Bluesky is actually like

The interface will not surprise anyone who has used a microblogging app. Posts are text-first with a 300-character limit, and you can attach up to four images, a video, or a GIF. You follow accounts, and replies form threaded conversations. Reposts and quote posts both exist, as do likes.

The main visible difference is the feed selector at the top of the screen. Alongside your chronological Following feed, you can pin custom feeds and switch between them. Many people run a small set: Following for people they know, a topic feed for an interest, and perhaps a discovery feed for finding new accounts.

Custom feeds

This is the feature longtime users tend to name first when asked what makes Bluesky worthwhile. A feed is just a program that decides which posts to show, and anyone can build and publish one. There are feeds for specific topics, languages, communities, art, science, and countless niches, plus algorithmic ones that surface popular posts from your extended network. If you dislike a feed, you unsubscribe and it stops affecting you. Our guide to custom feeds covers how to find, use, and create them.

Starter packs

New accounts on any social network face the same problem: an empty timeline is boring, and finding people to follow is slow. Starter packs solve this by letting anyone assemble a shareable list of accounts and feeds around a theme, which a newcomer can follow in one click. It is one of the more effective onboarding ideas in social software, and we explain it in our starter packs guide.

Moderation you control

Bluesky runs a baseline moderation service, and on top of it you can subscribe to independent labeling services that annotate content according to their own standards. You choose which to trust and whether each label hides, blurs, or simply warns. You can also build and share mute and block lists. The result is more control than most platforms offer, explained further in our guide to moderation lists and labelers.

How Bluesky compares to other networks

Two comparisons come up constantly.

For the full breakdown, see Bluesky vs Twitter and Bluesky vs Mastodon.

How to get started on Bluesky

1. Create an accountDownload the Bluesky app on iOS or Android, or go to bsky.app in a browser. Sign up with an email address. No invite code is needed.
2. Pick a handleYou get a free handle ending in .bsky.social. If you own a domain, you can use it as your handle instead, which doubles as verification. Check availability with our handle checker.
3. Fill in your profileAdd an avatar, a short bio, and a banner. Accounts with complete profiles get followed back far more often than blank ones.
4. Follow a starter packSearch for a starter pack in a topic you care about and follow it. Your timeline becomes useful within minutes rather than weeks.
5. Post and replyIntroduce yourself, then reply to others. Replies are the single fastest way to be noticed on Bluesky, because conversation is what the culture rewards.

Is Bluesky worth joining?

An honest answer depends on what you want. Bluesky is a good fit if you liked early Twitter's conversational feel, if you want a chronological timeline by default, if you care about being able to move your account without starting over, or if the idea of choosing your own algorithm appeals to you. The community is noticeably more willing to talk to strangers than larger networks, partly because it is smaller.

It is a weaker fit if you need the audience size of a major platform, if you rely on brands and institutions that have not joined, or if you want features that remain limited, such as native scheduling or long-form posts. Bluesky is still developing, and some gaps are filled by third-party tools rather than the app itself. Scheduling is a good example, which we cover in how to schedule posts on Bluesky.

For most people curious enough to be reading this, the sensible move is simply to try it. It is free, it takes a few minutes, and you can decide after a week of actually using it.

Frequently asked questions

What is Bluesky in simple terms?

Bluesky is a social network for short public posts, similar in feel to early Twitter. The difference is that it runs on an open standard called the AT Protocol, so your identity and data are portable and the algorithm shaping your feed is something you choose.

Is Bluesky free to use?

Yes. Creating an account and using Bluesky is free. No subscription is required to post, follow, or use core features.

Who owns Bluesky?

Bluesky Social PBC, a public benefit corporation. It began as a Twitter-funded research project in 2019 and later became independent. Because it runs on the open AT Protocol, the underlying network is not owned the way a closed platform is.

Is Bluesky the same as Mastodon?

No. Both are decentralised but use different standards. Mastodon uses ActivityPub with federated servers, while Bluesky uses the AT Protocol with portable identity. Bluesky is generally easier to join since you do not choose a server first.

Do I need an invite code to join?

No. Invite codes were required during the early beta, but Bluesky opened to the public in February 2024. Anyone can sign up with an email address.

How many people use Bluesky?

Bluesky passed 40 million registered users as of 2026. Growth has come in waves, typically after major changes at other social platforms.