The idea has been circulating for nearly two decades: build permanent, autonomous communities on the ocean, beyond the jurisdiction of any existing government, and use them as laboratories for new forms of governance, economics, and society. Peter Thiel put up $500,000 in seed money in 2008. The Seasteading Institute was founded that year by Patri Friedman—grandson of Milton Friedman—and Wayne Gramlich, a retired Google Brain engineer. The original plan was to float a prototype in the San Francisco Bay by 2010 and have an operational seastead by 2014. Neither happened. A deal with French Polynesia for a floating island in protected territorial waters collapsed in 2018 after a change in government. A cruise ship purchased in 2020 to serve as a floating residence in Panama was resold in 2021 after failing to obtain insurance. A startup called Blueseed that planned to anchor a ship near Silicon Valley as a visa-free tech incubator quietly died.
In 2026, nobody has built a country on the ocean. But several people are living on the ocean in structures that didn’t exist five years ago, and the distance between “floating house” and “floating community” is shorter than it used to be.
What actually exists right now
Ocean Builders, founded by Grant Romundt, has built and deployed the SeaPod—a floating smart home elevated above the waterline on a single steel column, anchored off the coast of Panama. Romundt lives in one. As of late 2024, he was showing it at conferences with photographs rather than renders, which in the seasteading world constitutes a major milestone. The SeaPod is solar-powered, collects rainwater for drinking water, and is stable enough that Romundt describes the experience as indistinguishable from being on land. The more advanced Alpha Deep model, deployed a few kilometers offshore, includes a Jet Ski lift, an underwater room where fish swim past your window, and sufficient stability to host a helicopter on its roof.
These are real structures occupied by real humans in real water. They are not a country. They are not a community. They are luxury floating homes for people with the resources and inclination to live on the ocean, priced and positioned as high-end real estate rather than governance experiments. Ocean Builders’ CEO declared the Alpha Deep “the first seastead that is now viable to be put in international waters,” which is a meaningful engineering claim and a meaningless political one—viability in international waters doesn’t confer sovereignty, legal identity, or the ability to operate outside the jurisdiction of the flag state under which the vessel is registered.
ArkPad, a company building modular floating structures in the Philippines, opened its Samal Reef Resort in September 2025—solar-powered floating glamp houses on an aquaculture platform that hosts guests, events, and owner stays. A second location near Próspera in Honduras is planned, with construction contingent on Q2 2026 timelines. ArkPad’s model is floating hospitality—hotels, restaurants, bars that extend waterfront businesses onto the water—rather than floating sovereignty. The Seasteading Institute promotes it as a stepping stone toward permanent ocean communities.
Seastead.ai is designing single-family mobile seasteads—solar-electric floating homes whose owners can choose which legal jurisdiction they’re under by physically moving between territorial waters. Arktide, a Florida-based company, is developing affordable floating structures while competing in the $100 million Carbon Removal XPRIZE through ocean-based carbon sequestration. Ventive Floathouse is building modular structures “capable of flourishing at sea permanently” with the stated goal of organizing them into independent floating cities.
None of these projects have achieved political autonomy. None have been recognized as a sovereign entity by any nation. Most are operating within the territorial waters and legal frameworks of existing countries—Panama, the Philippines, Honduras—not in international waters where the sovereignty question would actually arise.
OCEANIX Busan: The UN-backed version
The project that gets the most institutional credibility is OCEANIX Busan—a collaboration between OCEANIX (a New York-based floating architecture company), Bjarke Ingels Group (one of the world’s most prominent architecture firms), Samsung’s SAMOO architects, and UN-Habitat. Announced in 2021, unveiled at the UN in 2022, OCEANIX Busan is designed as the world’s first prototype sustainable floating city: three interconnected hexagonal platforms made of Biorock (a limestone material that’s buoyant and harder than concrete), housing 12,000 residents and visitors, generating 100 percent of its operational energy through photovoltaic panels, producing its own food and fresh water through closed-loop systems.
The estimated cost is $200 million. Construction was supposed to begin in 2023. It didn’t. The first platforms were supposed to be in the water by 2025. They weren’t. OCEANIX’s CTO, Marc Collins Chen—who previously helped facilitate the failed French Polynesia deal while working in that government—said in 2025 that construction would start in 2026. Whether that timeline holds is an open question. OCEANIX says it’s in talks with at least 10 other governments about similar projects.
The critical distinction between OCEANIX Busan and the libertarian seasteading vision is that OCEANIX Busan is explicitly not an exercise in political autonomy. It’s a climate adaptation prototype—a demonstration that floating infrastructure can provide new, flood-resistant land for coastal cities threatened by rising sea levels. It would operate within South Korean jurisdiction, under South Korean law, governed by Busan’s municipal authority. The floating city concept originated at a UN roundtable, has UN endorsement, and is being pitched as a tool for existing governments to manage climate displacement rather than a tool for individuals to escape existing governments. It’s the opposite of what the Seasteading Institute originally envisioned.
N-Ark, a Japanese consortium, has proposed a floating “healthcare city” for 10,000 people, with construction hopes targeting 2030. The Maldives Floating City—a joint venture between the Maldivian government and Dutch Docklands—has been in various stages of planning and promotion since 2012. Neither has broken ground.
The sovereignty problem nobody has solved
The entire seasteading premise depends on a legal claim that doesn’t hold up under the law as it currently exists. The UN Convention on the Law of the Sea establishes that a country’s Exclusive Economic Zone extends 200 nautical miles from shore. Beyond that are the high seas, which are not subject to the sovereignty of any state—but they are subject to international law, including the law of the sea, admiralty law, and the laws of whatever flag state a vessel is registered under. A floating structure in international waters is not a sovereign entity. It’s a vessel, subject to the jurisdiction of its flag state and to the international legal framework that governs maritime activity.
The Seasteading Institute’s current strategy, as of 2026, is to pursue a maritime flag—essentially getting a nation to recognize seasteads as a new class of vessel with a specific legal status. They describe this as “a glorious legal hack” and are raising roughly $473,000 to fund the first year of developing a Seastead Classification Society that would certify seasteads as safe and recognized by the “family of nations.” The five-year plan is to create a classification framework that maritime insurers and flag states would accept, which would at minimum allow seasteads to operate legally on the ocean even if they don’t achieve sovereignty.
Whether any nation would issue a flag to a structure whose explicit purpose is to operate outside government control is a question that answers itself. Flag states derive authority from the fact that flagged vessels must comply with their laws. A flag of convenience that provides protection without requiring compliance would undermine the entire flag-state system that maritime law depends on. The legal infrastructure for seasteading as a form of political autonomy doesn’t exist, isn’t being built by any government, and isn’t obviously in any government’s interest to create.
Why it keeps not happening
Gramlich, the Seasteading Institute’s co-founder, identified the core problem years ago: “It’s not a political problem. You can practice any kind of government you want, but you have to have the technology first.” The technology—at least for individual floating structures—now exists. SeaPods float. ArkPads float. OCEANIX’s designs are engineered to withstand Category 5 hurricanes. The engineering is solvable.
What isn’t solvable through engineering is the economic model. Living on the ocean is expensive. Supply chains for food, medical care, construction materials, and repairs all require proximity to land-based infrastructure. The further you get from shore, the more everything costs—and the entire point of seasteading is to be far from shore. The Seasteading Institute’s pivot from open-ocean libertarian sovereignty to protected-water floating real estate within existing nations is a tacit acknowledgment that the economics only work close to land, which is precisely where the legal autonomy doesn’t exist.
The dream of building a country on the ocean isn’t dead. It’s just migrated from “build an autonomous civilization in international waters” to “build luxury floating houses near existing cities under existing laws and call it a movement.” The structures are impressive. The engineering is real. The political vision that launched the whole thing—governance experimentation beyond the reach of existing states—is further away than it was when Thiel wrote the check in 2008, because every practical success has required moving closer to land and deeper into existing legal frameworks.
We cover seasteading alongside intentional communities, planned cities, and the history of attempts to build better societies from scratch across our Utopian Societies course—including why the projects that promise to escape existing systems keep discovering that the systems are harder to escape than the ocean is to float on.