About
We're building quiet cybersecurity.
Most security tools are loud, technical, and priced for enterprise. Kytheos is designed for the rest of us — and for the teams that want their people to actually understand the threats they face.
Our mission
Guardian, our first product, answers a single question — is this safe? — in plain language. Behind it sit dozens of independent signals: reputation feeds, domain heuristics, credential-path detectors, hash lookups. In front of it sits an AI reasoner that explains, but never fabricates confidence.
The rest of the Kytheos ecosystem — Intelligence, Sentinel, Code, Cloud, Identity, Response — follows the same rule. Signals do the judging. Language does the teaching.
What we believe
Honesty over confidence
We would rather say we don't know than pretend to be sure. Every verdict is traceable to the signals behind it.
Plain language, always
Security tools speak in acronyms. We translate — so a parent, a founder, and an analyst can all read the same report.
Privacy as posture
We don't store submissions. Threat feeds see hashes, never data. Anything else would be a contradiction.
Kytheos is early. Guardian is live.
If you have a suspicious link, email, or file — try it. If you want to work with us or hear when the next module ships, reach us at hello@kytheos.com.