Bluesky is a decentralized social media platform built on the AT Protocol (Authenticated Transfer Protocol), originally incubated inside Twitter under Jack Dorsey in 2019 and spun out as an independent company in 2021. The platform opened to the public in February 2024 and reached approximately 30 million users by 2026 through sustained migration from X (formerly Twitter) following ownership and policy changes. The reference on what Bluesky actually is, how the AT Protocol works, who is on the platform, and what the implications are for communications and marketing.
How Bluesky Differs from Twitter / X
Decentralized protocol
Bluesky operates on the AT Protocol — an open standard that allows multiple servers to interoperate. Users can in principle move accounts between providers, run their own servers, and select among competing moderation services. The protocol architecture is closer to email or to Mastodon's ActivityPub than to a traditional centralized social network.
Algorithmic choice
Users can select among multiple algorithmic feeds rather than being served a single platform-controlled feed. The choice includes chronological feeds, topical feeds maintained by users, and various engagement-ranked alternatives.
Moderation architecture
Bluesky operates a baseline moderation service alongside the ability for third parties to operate additional moderation services users can subscribe to. The architecture is intended to produce more user control over the content environment than centralized platforms allow.
Funding model
Bluesky is a Public Benefit Corporation. As of 2026 the platform operates without traditional advertising; revenue comes from optional subscription tiers and the company's broader infrastructure work on the AT Protocol.
Who Is on Bluesky
Bluesky's user base skews toward journalists, writers, academics, technology professionals, and policy commentators — the cohort that migrated most aggressively from X following 2022-2024 changes. Politicians, public health officials, and government accounts established sustained presence. Major media outlets (The Guardian, The New York Times, The Washington Post, NPR) maintain accounts. The platform is meaningfully smaller than X but covers an audience that overlaps substantially with high-engagement information consumers.
Why Brands and Communicators Should Care
Journalist concentration
Reporters in technology, politics, science, and culture beats moved to Bluesky in substantial numbers. Pitching journalists who maintain primary platforms on Bluesky requires understanding how the platform works.
AI engine retrieval
ChatGPT, Claude, Gemini, Perplexity, and Google AI Overviews retrieve content from social platforms when answering questions about people, brands, and events. Bluesky content is indexed and retrieved. Brand presence on the platform contributes to AI engine visibility in the same way other social presence does.
Crisis communications surface area
Conversations about brands happen on Bluesky regardless of whether the brand maintains presence. Monitoring the platform alongside other channels is now part of standard crisis-response infrastructure.
How Brands Should Approach the Platform
Maintain claimed handles — reserve the brand name and CEO names even if not actively posting
Build presence selectively — not every brand needs sustained Bluesky activity; many do
Match platform tone — Bluesky culture skews toward substantive discussion rather than promotional posting
Monitor for brand mentions — the platform's smaller scale does not eliminate reputational risk
Engage journalists who maintain presence — the journalist-pitching layer increasingly requires Bluesky literacy
The Bottom Line
Bluesky is a decentralized social platform built on the AT Protocol with approximately 30 million users as of 2026 and a user base concentrated among journalists, writers, academics, and policy commentators. The platform matters for communicators because journalists migrated there, because AI engines retrieve content from it, and because brand conversations happen there regardless of brand presence. The platform does not replace X but adds a category-relevant surface that disciplined communications operations now monitor and engage.
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.
