Arbiter, Inc.
Decision, safety, and infrastructure for the work that has to be right.
A multi-industry company building across five regulated and high-stakes domains. One operator, building in the open.
A decision a regulator can replay.
Building neutral trust and compliance infrastructure for money, autonomous agents, and cross-border trade — wherever a high-stakes call must be made and later proven. Each decision produces a signed, tamper-evident record an examiner can verify independently: who decided what, on whose authority, and that the record has not changed since.
Cold storage that reaches the last village.
Developing solar-powered cold-storage infrastructure for the places the electrical grid does not reach. Up to a third of a smallholder harvest spoils before it can be sold, for want of refrigeration. The work is a pay-as-you-go cold chain at village scale, so a farmer’s crop becomes income instead of waste.
Tell a real voice from a synthetic one.
Developing systems that detect cloned and synthetic voices in real time, to stop the fastest-growing fraud of the decade: the scam phone call. The work spans the whole kill-chain — verify the voice is human, defend the call while it is happening, and help victims recover afterward — and runs on the device, so the audio never has to leave it.
Catch the error before the claim is denied.
Two efforts. The first reads the documents healthcare runs on before a human has to, catching the errors that get a claim denied at submission rather than months later. The second is early-stage research toward giving a voice back to people who have lost the ability to speak, through a silent-speech neural interface.
Where capability and calibration diverge.
Research into a counter-intuitive failure of large models: a system can grow more capable at a task while growing worse at knowing when it is wrong. The work is to measure that gap rigorously, and to harden models against the structured perturbations that exploit it.
The company
One operator. Five domains. Built in the open.
Arbiter builds decision, safety, and infrastructure for regulated and high-stakes domains: places where being wrong is expensive and someone is required to be right.
It is solo-operated. No revenue, funding, or customers are claimed anywhere. Each domain is at an honest stage, stated plainly: shipping, in development, or research.
The unifying idea is the same in every domain. Take an ambiguous input, apply the rules, make the call, and keep proof a third party can check.
The operator
Dayeon Kang
I’m the founder and sole operator of Arbiter — a developer, quantitative researcher, and civic-technology builder. I design, build, and ship across all five domains myself, from the cold-chain hardware thesis to the cryptographic trust rails to the AI-safety research.
My method is the same everywhere: I find a place where a high-stakes decision is made badly or slowly, build the system that makes it well, and keep proof it was right. I work in the open and ship one venture at a time, honest about what is real and what is still being built.