we built cairn because knowledge shouldn't need a wifi password.

cairn is a modular, solar-powered, offline AI knowledge system. we make hardware and software that preserves and transmits human knowledge when infrastructure fails.

the story

we started with a question: what happens to everything you know when the power goes out?

not the theoretical version. the real one. you're in a cabin. or a shelter. or just somewhere the cell towers don't reach. someone is hurt, or the water looks wrong, or you need to grow food for the first time in your life.

your phone is dead. the internet doesn't exist anymore. what do you actually know?

most people's answer is: not enough. and that's not their fault — we've outsourced knowledge to the cloud. it's convenient until it isn't.

cairn is the fix. a complete AI-powered knowledge system that runs on a raspberry pi, charges from a solar panel, and contains 120GB of the most important things humanity has learned about survival, medicine, engineering, agriculture, and rebuilding.

no internet. no subscription. no dependency on any company, including ours.

cairn device glowing in darkness — knowledge preserved

"knowledge should be owned, not rented."

no subscriptions. no cloud lock-in. you buy it, you own it. if our company disappears tomorrow, your cairn still boots.

"repair is a right, not a feature."

every cairn product uses thumb screws you can turn with your fingers. every design is published. every schematic is open. you can fix what you own.

"everyone deserves every pathway."

buy our software. build it yourself from our open BOMs. or buy it pre-built with premium engineering. we support all three because self-reliance means choice.

everything is open.

we publish every BOM, every STL file, every wiring diagram, every line of firmware. not because it's trendy — because our product is for people who need to survive, and survival shouldn't depend on our permission.

github build guides stl downloads

built on the raspberry pi ecosystem.

we chose raspberry pi because it's the most widely available single-board computer on earth. 50 million units sold. available in 100+ countries. every part is sourceable, replaceable, and understood by millions of people. when your survival depends on your tools, the tools should be made of common parts.

pi 5 compute nvme storage lifepo4 power lora mesh esp32 sensors 120gb knowledge cairnos linux

design philosophy

we looked at every survival product on the market. they all look like call of duty designed them.

we believe gear for the worst day of your life should be the best-designed thing you own. when you're stressed, scared, and exhausted, beautiful tools inspire confidence. ugly tools inspire doubt.

cairn is designed by teenage engineering's principles: honest materials, visible engineering, function creates form. aluminum that ages with dignity. amber accents you can find in the dark.

cairn design materials — aluminum, thumb screw, polycarbonate macro detail

for investors & partners

if you're an investor or partner.

$14B

prepper market size

9.5%

CAGR growth

23M+

self-identified preppers

cairn sits at the intersection of a $14B prepper market growing at 9.5% CAGR, a 23M+ audience of self-identified preppers, and a product category — offline AI hardware — that no one has built properly yet.

our closest competitor sold 5,000 units with no AI capability. we have AI, mesh comms, modular hardware, and the only product in the category that looks like it was designed this century.

hello@cairn.sbs