Cryostasis and Cryonics: How It Works and Why Thousands Have Signed Up
A futuristic idea that has already attracted thousands
Cryostasis, often discussed through the related field of cryonics, is one of the most provocative ideas in modern science and longevity culture. The concept is straightforward, even if the implications are enormous: after a person is declared legally dead, their body or brain is preserved at ultra-low temperatures in the hope that future medicine may one day repair the original damage and restore life. No one has yet been revived from cryonic preservation, so this remains a speculative practice rather than an established medical treatment.
Even so, cryostasis is no longer a fringe thought experiment with only a handful of followers. Based on figures currently published by major cryonics organizations, hundreds of people have already been cryopreserved, and several thousand more have signed up, joined, or arranged for preservation in advance.
What is cryostasis?
In everyday use, people often say “cryostasis” to describe the broader ambition of preserving a human being at extremely low temperatures. In practice, the real-world organizations offering this service usually use the term cryonics or cryopreservation. The idea is to preserve the brain’s physical structure as carefully as possible after legal death, on the assumption that memory, identity, and personality are encoded in that structure. Supporters argue that future technology might eventually be able to repair what current medicine cannot.
That does not mean cryostasis is proven. It is better understood as a wager on future science. People who choose it are not buying certainty; they are buying a possibility, however remote, instead of accepting burial or cremation as the final full stop.
How many people have chosen cryostasis?
This is where the topic gets slippery, because “chosen cryostasis” can mean two different things.
One group includes people already cryopreserved after legal death. The other includes living members or contract holders who have made arrangements for future preservation. Those two categories should not be confused.
People already cryopreserved
The largest organizations currently publishing figures report the following totals:
Alcor says it has 252 cryopreserved patients.
Cryonics Institute lists 268 patients in its membership statistics.
Tomorrow Bio says it has 20 cryopreserved patients.
KrioRus says it has cryopreserved 106 people.
Taken together, those published figures add up to 646 cryopreserved people. Because reporting standards differ between organizations, the safest phrasing is that the real number is in the hundreds and likely above six hundred based on current provider disclosures.
People who have signed up or made arrangements
The wider pool is much larger:
Alcor reports 1,535 members.
Cryonics Institute lists 1,995 members in its March 2025 statistics.
Tomorrow Bio says it has 1,000+ members.
KrioRus says more than 600 people have signed cryopreservation contracts.
That puts the currently published total at more than 5,100 people worldwide who have joined, signed, or arranged for cryonic preservation through these major providers. Because organizations use slightly different definitions for “member,” “contract,” and related categories, it is most accurate to say that at least several thousand living people have actively chosen cryostasis in principle.
Why do people choose cryostasis?
The people drawn to cryostasis are usually motivated by one of three impulses.
The first is medical hope. Many supporters see cryonics as a bridge to future therapies that do not exist yet. The second is philosophical refusal. They reject the idea that death should be accepted merely because present-day medicine has run out of options. The third is probabilistic thinking: if burial offers no chance of revival, even a tiny speculative chance can seem worth pursuing.
This is why cryostasis attracts a peculiar coalition of technologists, futurists, longevity enthusiasts, and people who simply cannot make peace with finality. It is part science, part faith in innovation, and part existential rebellion.
Is cryostasis real science or science fiction?
The honest answer is: it is real as a preservation practice, but unproven as a path back to life. Organizations do exist. Bodies and brains are being preserved. Contracts are being signed. Facilities are operating. But there is still no demonstrated method for reviving a cryopreserved human being.
That distinction matters. Cryostasis is not fictional in the sense that nobody is doing it. Yet it remains radically speculative in its ultimate promise. The entire enterprise depends on future breakthroughs in tissue repair, neuroscience, and regenerative medicine that have not yet arrived.
The bottom line on how many people chose cryostasis
So, how many people have chosen cryostasis?
A careful, current answer is this: more than 600 people have already been cryopreserved, and more than 5,000 others have signed up, joined, or arranged for preservation through major organizations.
That is still a tiny minority of humanity, but it is far beyond the level of curiosity or novelty. Cryostasis has become a small, durable movement populated by people willing to make the strangest bet of all: that death, properly managed and deeply chilled, might one day be negotiable.
What do you think: is cryostasis a rational scientific gamble or simply a modern myth wrapped in liquid nitrogen?
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