What Bluesky actually is, and what the protocol changes
Bluesky has nearly 46 million registered accounts and about 3 million daily actives. The interesting part is not the size — it is that your account, your feed and your content filters are three separate things.
8 minute read
The short version, and why the protocol part matters
Bluesky is two things at once, and most explanations only describe one of them. It is a text-first social app that feels a lot like Twitter did around 2012: posts cap at 300 characters, you can attach images or video up to three minutes, and you reply, repost and follow. It is also the largest application built on the AT Protocol, an open specification for social networking that the same company develops. The app is easy to describe and easy to leave. The protocol is the part that makes Bluesky structurally different from Threads, X or Instagram, because it splits your account, your feed and your content filters into three separate things that do not all have to be run by Bluesky. Whether that separation is worth anything to you is the real question, and it depends entirely on what you are using social media for.
What the AT Protocol actually is
Strip out the jargon and there are three moving parts. Your personal data server holds your repository — your posts, your likes, your follow graph — and handles your login and your signing keys. A relay crawls every server in the network and emits one combined stream of everything happening on it. An AppView subscribes to that stream, builds the indexes that make a timeline or a search result possible, and serves them back to the app on your phone. Bluesky's federation architecture documentation lays this out plainly. In the ordinary case Bluesky runs all three for you and you never think about any of it. The design point is that each piece can be run by someone else, and your identity — a decentralised identifier, or DID — is deliberately not owned by whoever happens to be hosting you.
Portability: what it buys you, and what it does not
Because your identity is a DID rather than a row in one company's user table, moving hosts is defined behaviour rather than a favour. You export your repository, point the DID at a new personal data server, and your posts, your follows and — the part that matters — your followers come with you. Nobody has to re-follow you. There is no equivalent on any Meta property. Be clear about the limit, though, because this gets oversold. Portability protects you from a hosting decision, not from an audience decision. If everyone you talk to stays on the main Bluesky AppView and you do not, you have kept your data and lost your room. It is insurance against a platform turning on you, rather than a benefit you feel in any given week.
Your handle is a domain name, which is the underrated part
Every new account is handed something.bsky.social, which reads as provisional and is trivial to impersonate. You can replace it with a domain you already own: request a token in settings, add it as a DNS TXT record at your registrar, confirm in the app. It takes about fifteen minutes and costs nothing beyond the domain you were already paying for. The result is a kind of proof. Only the person who controls DNS for a domain can put that domain in their handle, so a handle matching your website verifies itself without anyone approving it. News organisations use this at scale, putting every journalist on the masthead domain. If you run a site of any kind, this is the highest-value thing you can do on Bluesky and it is a one-afternoon job.
Custom feeds are not the same thing as an algorithm
Bluesky introduced custom feeds in July 2023 and they remain the feature that most changes daily use. A feed generator is a service that reads the network stream, applies whatever rule its author wrote, and hands back a list of posts. You subscribe, and it shows up as a tab beside your following feed, more like a channel than a setting. Some are plain keyword filters; some are ranked recommenders built by hobbyists. The meaningful difference from a conventional feed is not that these are better — most are considerably worse — but that you picked them, you can tell roughly what they do, and you can leave in one tap without arguing with a black box. You can pin several and read the same network through different lenses.
Moderation as a marketplace of labellers
Moderation on Bluesky is stackable, to use the platform's own term. Independent services called labellers annotate content with labels, and your app decides what each label does: hide the post, blur it, show a warning, or nothing at all. Anyone can run one using Ozone, the tool Bluesky open-sourced in March 2024 and uses for its own moderation. You subscribe to labellers roughly the way you follow accounts. One thing gets misreported constantly: this is not opt-out moderation. Bluesky's own moderation always applies inside the Bluesky app, and everything shown there has to meet Bluesky's community guidelines. What the system lets you add is more filtering, or a niche service that catches things a general-purpose team never would. Layers on top, not a route underneath.
Verification: two systems, neither of them for sale
Bluesky spent its first two years arguing that domain handles made badges unnecessary, then shipped badges anyway in April 2025. Two systems now run side by side. Bluesky verifies notable accounts directly and shows a blue check, and Trusted Verifiers — organisations vetted by Bluesky, with The New York Times named at launch — carry a scalloped badge and can verify their own people. Tapping a check tells you who issued it, which is more information than any other network gives you. Neither badge can be bought, and neither buys reach; you apply through a form and wait. Domain handles still sit alongside all of this and still do most of the practical work of proving that an account is who it says it is.
How big it is, and where it earns your time
Be blunt about scale: the registration figure is the one everyone quotes and the least useful. Bluesky's public stats showed close to 46 million registered accounts in August 2026. Similarweb's measurement of actual mobile usage, reported by TechCrunch, found 10.4 million monthly actives in June 2026 and roughly 3 million daily — against 147 million daily on Threads. There is no ad auction and no creator payout scheme, so nothing you post there converts to money on the platform itself. Treat Bluesky as a cheap secondary channel where a specific audience already lives, not as a growth engine. Claim the domain handle, add it to whatever queue already handles your other accounts, and if you are already cutting a long recording into clips, one extra landscape export under three minutes costs almost nothing. FrameOS can produce those alongside your vertical cuts — 300 credits for 3 days · no card.
FAQ
What is Bluesky in simple terms?
A text-first social app, similar in feel to early Twitter, with a 300-character post limit and video up to three minutes. Underneath it runs on the AT Protocol, an open specification that keeps your identity, your feed and your content filters as separate components, any of which can be run by someone other than Bluesky.
How many people actually use Bluesky?
Registrations were near 46 million in August 2026, but that counts anyone who ever signed up. Similarweb measured 10.4 million monthly active mobile users in June 2026 and around 3 million daily in July, down roughly a quarter year on year. Threads, on the same measurement, had 147 million daily actives.
What is a custom feed on Bluesky?
A feed built by anyone, not just Bluesky. A feed generator reads the network's post stream, applies its author's rules, and returns a list you subscribe to. Subscribed feeds appear as tabs next to your following feed, so you can pin several and switch between them. Bluesky launched them in July 2023.
Does the Bluesky blue check mean anything?
It means Bluesky or a Trusted Verifier confirmed the account, and tapping the badge shows you which. It cannot be purchased and does not affect reach. A domain handle does a similar job through DNS: only the domain's owner can set it, so a handle that matches a known website is self-verifying.
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