The Atmosphere Is Already Here

Most people who join Bluesky think they're signing up for a social network. They're not wrong — but they're missing the bigger picture. Bluesky is a client: a single application built on top of something far more interesting. That something is called the AT Protocol, and the ecosystem of apps, services, and infrastructure that runs on it has a name too: the Atmosphere. This distinction matters. The web didn't become useful because one browser existed. It became useful because the protocol underneath was open. The same logic applies here. And in 2026, with a new European infrastructure initiative called Eurosky now live, the Atmosphere just got a lot more interesting, and a lot more relevant for anyone who cares about where their data lives. What the AT Protocol actually is The Authenticated Transfer Protocol was created by Bluesky PBC, but it was explicitly designed to be owned by no one. The separates three things that Big Tech has spent fifteen years fusing together: identity, data storage, and the application layer. On most platforms, these are inseparable. Your Twitter account is now X's. Your Instagram posts live on Meta's servers. If the platform shuts down, disappears, or simply decides to change the rules, you lose everything. The AT Protocol breaks this model. Your identity is a handle; something like @yourname.yourdomain.com. That identity is cryptographically tied to a Personal Data Server (PDS): a place where your posts, your profile, your connections, and your content actually live. Any application that speaks AT Protocol can talk to your PDS. You're not locked to any single app. You can switch clients the way you switch email apps without losing your inbox. > "The social part has been surgically removed by Big Tech. The real opportunity here is to bring the social back into social media." That quote is from Sebastian Vogelsang, co-founder of Eurosky (and CEO of Flashes) and it captures exactly why this architecture is significant. Lexicon, the schema language built into AT Protocol, means apps can understand each other's data. The result is an ecosystem where building a new social experience doesn't require building a new walled garden, you just connect to what already exists. --- The ecosystem Bluesky is one client among many This is the single most important thing to understand about the Atmosphere: Bluesky — the app, the blue butterfly logo, the thing that 40 million people signed up for — is just one way to access the network. It is the reference client built by Bluesky PBC, and it is excellent. But it is not the only door. The AT Protocol currently has over 40 million users. Those users' data doesn't belong to Bluesky, it lives across thousands of personal data servers. Other apps can read it, write to it, and build entirely different experiences on top of it. This is what makes what's happening right now so extraordinary: a community of developers is building a parallel internet, one application at a time, all connected by a shared protocol. That's the architecture. Now let's look at what's actually being built on top of it. Six applications rewriting the rulebook - Bluesky Alternative to: X / Twitter The reference client for the AT Protocol. Chronological feeds, custom algorithms you choose yourself, no engagement-bait amplification. Not owned by a billionaire. The place where 40 million people already are — and the proof that the open model can reach mass adoption. Visit Bluesky - Flashes Alternative to: Instagram A Berlin-based photo-sharing app built on AT Protocol by the same team behind Eurosky's co-founding. Posts appear chronologically on Bluesky too — same identity, different interface. No algorithmic feed manipulation, no hidden ad targeting, no Meta. Visit Flashes - Sifa.ID Alternative to: LinkedIn Professional identity on the AT Protocol. Built by Dutch developer Guido X Jansen under Singi Labs, Sifa (Swahili for "reputation") lets you own your career narrative – career history, skills, endorsements – all on your own PDS, not on Microsoft's servers. Hosted on Hetzner in Germany. If you already have a Bluesky account, you already have a latent Sifa profile. Visit Sifa.ID - Germ DM Alternative to: WhatsApp / FB Messenger End-to-end encrypted messaging, launched natively inside Bluesky in February 2026. Built on Messaging Layer Security (MLS), the new IETF standard. No phone number required — your ATProto handle is your identity. Messages can't be decrypted by anyone, including Germ or Bluesky themselves. Visit Germ Network - Popfeed Alternative to: Letterboxd / Goodreads Track, review, and discuss the films, shows, books, games, and music that define your cultural life — all in one place, all connected to your AT Protocol identity. Sign in with your existing Bluesky or Atmosphere account. Your reviews live on your PDS, not on a startup's private database. Visit Popfeed - Recipe Exchange Alternative to: Paprika 3 A community-driven recipe sharing layer built on the Atmosphere. For Paprika 3 users (one of the most beloved recipe management apps) Recipe Exchange brings the social dimension that's always been missing: sharing recipes with your actual network, not strangers optimising for virality. Visit Recipe Exchange What these six applications have in common is not just a shared protocol. They share a conviction: that the social graph you've built shouldn't be owned by the platform you happen to have signed up to first. Your connections, your content, your identity; they belong to you. --- European infrastructure Eurosky: sovereign infrastructure for the open web Here is where the story gets specifically European — and specifically urgent. Eurosky is not a social network. It's infrastructure. Specifically, it's a Personal Data Server provider operating in the European public interest, housed under Stichting Modal, a Dutch non-profit that grew out of the Free Our Feeds campaign. Their servers run on Hetzner infrastructure in Falkenstein, Germany. Every aspect of their operation is governed by European law — GDPR, the Digital Services Act, no foreign holding entities, no US jurisdiction. What this means practically: if you create an account at eurosky.social, or move your existing AT Protocol account there, your posts and profile live on European servers, subject to European law. A foreign government cannot press a "kill switch" to deplatform you. Your data cannot be subpoenaed under US law. And if Bluesky PBC — the American company — were to shut down tomorrow, the protocol would continue and your Eurosky data would remain fully intact and accessible through any AT Protocol-compatible application. Eurosky has announced a partnership with Igalia to develop key infrastructure for the open social web. Their roadmap includes building a shared content moderation system that European app developers can license — reducing the compliance burden for startups trying to navigate the DSA and similar legislation while competing with platforms that have thousands of trust-and-safety engineers. > Around €25 billion a year are funnelled to Big Tech through social media advertising revenue alone. These old monopolies are fuelling new ones — in cloud and AI — draining present and future economic value from European businesses and economies. That framing, from Eurosky co-lead Sherif Elsayed-Ali, positions this not as a cultural project but an economic one. Europe's digital sovereignty conversation has too often stayed at the level of regulation — what to prohibit, what to fine. Eurosky is part of a shift toward building actual alternatives: infrastructure that European startups can build on, rather than renting capacity from the platforms they're trying to compete with. Why this is a structural shift, not a feature The pattern I keep coming back to is this: every capability in the Atmosphere is modular. Germ didn't wait for Bluesky to build encrypted messaging, they built it, integrated with ATProto, and Bluesky added a badge to profiles. Sifa didn't need LinkedIn's API access, they used the open lexicon system and built their own schema. Flashes didn't negotiate a data partnership with Instagram, they just built on the same identity layer. On centralised platforms, new features come from the platform, or not at all. On the Atmosphere, they come from the community. That is a structurally different model and it's one that Big Tech, for all its resources, cannot easily replicate, because replication would require giving up the control that makes their business model work. This is also why Eurosky matters beyond the sovereignty argument. When European startups build on AT Protocol infrastructure that's hosted in Europe, governed by European law, and backed by European non-profit governance, they're not just building ethically, they're building on a foundation that can't be pulled from underneath them by a policy change in San Francisco or a geopolitical event in Washington. --- Get Started Your move: join the Atmosphere on European terms There are two ways to get your identity into the Atmosphere with a Eurosky account. Both lead to the same place: an AT Protocol handle at @yourname.eurosky.social, stored on European servers, usable across every app described in this article. - New to the Atmosphere? Register directly at eurosky.tech/accounts. It's free, accounts are low-cost to run and Eurosky operates in the public interest. You'll get a PDS hosted in Germany, governed by EU law, and ready to use with Bluesky, Flashes, Sifa.ID, Popfeed, Germ DM, and every other AT Protocol-compatible app in the ecosystem. - Already on Bluesky? You can migrate your existing account – including your followers and content – to Eurosky without losing anything. Account migration is one of AT Protocol's core features: your social graph travels with you. Head to move.eurosky.tech and follow the migration steps. Either way, you're not choosing a platform. You're choosing where your data lives. The apps you use don't change. The conversations you have don't change. What changes is the jurisdiction, the governance, and the degree to which your digital presence is yours. The Atmosphere is already here. The question is which part of it you build your presence on. Join the Atmosphere on European terms. 💡 Create a new eurosky.social account, or migrate your existing AT Protocol identity to European infrastructure. Free, sovereign, and yours to keep. --- Eurosky Infrastructure Hosted on Hetzner, Falkenstein (Germany). Governed by EU law. Operated under Stichting Modal, a Dutch non-profit. Partnered with Igalia for infrastructure development.