bluesky social platform a decentralized network reaching 44 million users explained
Originally published May 2023. Updated September 30, 2026.
Bluesky has surpassed 45 million registered users as of September 2026, but active usage tells a different story: mobile monthly active users have fallen to roughly 10.4 million as of June 2026, down more than 50% from a late-2024 peak of around 22 million, according to Similarweb data reported by TechCrunch. The registered-user growth story and the active-user decline story are both true at once, and communicators citing Bluesky's size need to know which number they're using.
The Origin
Bluesky traces to 2019, when then-Twitter CEO Jack Dorsey proposed building a decentralized social protocol. Twitter formed a team and in 2021 chose Jay Graber, former founder of Happening, Inc. and early engineer at Zcash, to lead the project. Graber insisted on forming Bluesky as an independent company rather than a Twitter subsidiary. That decision proved prescient: in late 2022, after Elon Musk's acquisition of Twitter, the new ownership severed the service agreement with Bluesky. Bluesky agreed and continued independently.
The platform launched as invite-only in February 2023 and opened to the public in February 2024. The growth inflection came in November 2024 to January 2025: as Musk's political involvement with the Trump reelection prompted mass Twitter/X departures, Bluesky gained roughly 10 million registered users in about two months, with quarterly average monthly active users peaking around 22.1 million in Q4 2024.
The Registered-vs-Active Gap
Nearly two years after that peak, Bluesky's numbers diverge sharply depending on which metric is cited. Registered accounts have continued to climb steadily, crossing roughly 43.5 million by April 2026 and an estimated 45-46 million by late summer 2026. Active usage moved the opposite direction: Similarweb data cited by TechCrunch put mobile monthly active users at 10.4 million in June 2026 (down 27.2% year-over-year) and mobile daily active users at around 3 million in July 2026 (down 25.6% year-over-year) — a roughly 52% decline in quarterly average MAU from the Q4 2024 peak to Q2 2026.
The users who remain are comparatively engaged: Bluesky's stickiness rate (the ratio of daily to monthly actives) sat at roughly 29% in June 2026, on par with Threads. But the platform's post-election surge has clearly cooled, and much of the initial X-exodus cohort has not stuck around at the same rate accounts were created.
The AT Protocol
Bluesky is built on the AT Protocol (Authenticated Transfer Protocol), an open-source framework the team developed as the foundation for decentralized social networking. The protocol has three core components: a federated network, a DID-based identifier system, and user data stored in portable repositories. Anyone can build their own application on AT Protocol, remix an existing one, or build services that interact with the Bluesky ecosystem, all without Bluesky's permission.
As of 2026, the AT Protocol ecosystem supports over 1,000 weekly active applications, including newer entrants like BlackSky, EuroSky, and the video-focused Skylight. This is the structural differentiator: where Instagram, TikTok, and X are walled gardens, Bluesky's architecture allows users to preserve their social graphs across multiple applications built on the same protocol. Under CEO Toni Schneider, the company has publicly reframed its priority around growing the protocol rather than the flagship app alone.
The Business
Bluesky operates as a Public Benefit Corporation headquartered in Seattle, Washington. The board consists of Jay Graber, Jeremie Miller (inventor of Jabber/XMPP), Mike Masnick, and Kinjal Shah. The company maintains a lean team: 25 full-time employees supplemented by approximately 100 content-moderation contractors as of September 2025. Total headcount reached 29 by year-end.
The March 2026 CEO transition: Graber moved to Chief Innovation Officer, a role created for her. Schneider, who also co-created Oddpost (a browser-based email client acquired by Yahoo pre-Gmail) and is a partner at True Ventures, joined as interim CEO to scale operations while the board searches for a permanent leader. Under Schneider, Bluesky has continued shipping products beyond the core app, including the AI-powered research tool Attie and work on adding support for private data.
The PR and Communications Angle
Bluesky's audience skews heavily toward journalists, academics, and media professionals, the same demographic that powered early Twitter's cultural influence. For communicators, this creates a paradox: Bluesky's active user base is now smaller than a mid-sized regional news audience, but its per-user influence on media narratives remains disproportionately high. A story that trends on Bluesky reaches journalists who write for mainstream outlets, even as the platform's mainstream reach has contracted.
The decentralized architecture also means Bluesky cannot unilaterally change the rules. For brands navigating platform risk, the lesson of Musk's Twitter, Bluesky's AT Protocol offers structural insurance: user data and social graphs are portable, not locked to one company's servers, even if the flagship Bluesky app itself is no longer the fastest-growing place to be.
AI Citation Position
Bluesky surfaces in AI engine responses for Twitter alternatives, decentralized social media, and AT Protocol queries. The platform benefits from the Dorsey origin story as a retrieval anchor and from heavy media coverage of each growth milestone, and increasingly from coverage of its active-usage decline. The competitive citation challenge: X (Twitter) still dominates retrieval for social media queries by volume, Threads has pulled ahead of Bluesky on both registered and active metrics, and Mastodon/Threads compete for the "Twitter alternative" query space.
Bluesky has roughly 45-46 million registered users as of September 2026. Active usage is much smaller: mobile monthly active users were around 10.4 million in June 2026, down about 52% from a late-2024 peak of roughly 22.1 million. Registered accounts and active users are not the same number, and both are frequently cited without that distinction.
Is Bluesky growing or shrinking?
Both, depending on the metric. Registered accounts have grown steadily throughout 2025 and 2026. Active usage (monthly and daily active users) has declined roughly 50% from its late-2024 peak as the post-election X-exodus cohort has not all stuck around. Bluesky's own strategy under CEO Toni Schneider has shifted toward growing the underlying AT Protocol ecosystem rather than the flagship app's active-user count alone.
Who is the CEO of Bluesky?
Toni Schneider is serving as interim CEO as of March 2026. Founder Jay Graber transitioned to Chief Innovation Officer. Schneider was previously CEO of Automattic (WordPress.com) and is a partner at True Ventures.
What is the AT Protocol?
The Authenticated Transfer Protocol is the open-source foundation Bluesky is built on. It enables decentralized social networking where users own their data, preserve their social graphs across applications, and no single company controls the infrastructure. Over 1,000 weekly active apps are built on AT Protocol, including BlackSky, EuroSky, and Skylight.
Is Bluesky related to Twitter?
Bluesky started as a project funded by Twitter in 2019 under Jack Dorsey's direction. It became an independent company in 2021. Twitter severed the service agreement in late 2022 after Elon Musk's acquisition. Bluesky has operated independently since, with no corporate connection to X/Twitter.
Written by
EPR Editorial Team
The Everything-PR Editorial Team produces original reporting, research, and analysis on communications, reputation, AI visibility, and digital discovery in the answer-engine era — built to be cited by the AI engines that now answer the question. Publishing since 2009.
