From zero trust to one verdict.
Zero Door weighs every binary, library and package on your servers against the original, and backs each verdict with evidence your auditor can check offline. Built for regulated and air-gapped server fleets.
A server produces thousands of changes a day. You should hear one voice.
Package updates, log rotation, temp files, a real implant: they all look like change. Zero Door asks a different question of each one: is it legitimate? Signed by whom, shipped in which package, seen where before, and does what runs in memory match what sits on disk. It speaks only when the answer is no.
Four rules, each with its proof.
Each is a refusal or a promise you can measure, and each links to the place where you can check it.
The first scan weighs every binary, library and package already on the host against the original. A baseline records what is there; it does not bless it.
See the proof: Nothing is trusted for having been there yesterday.Evidence leaves as a signed bundle with its own verifier. It checks offline, with no account and no call to our servers.
See the proof: Evidence checks out without us.Every change is weighed first: is it the original, which package shipped it, which process wrote it, was it inside a change window. A Windows update folds into one alert per server.
See the proof: Change is a question, not an alert.The self-hosted build is the same product: an offline signed licence, signed updates you carry in, a local copy of the legitimacy database. What needs a route out is named and off: reputation lookups and trusted timestamping.
See the proof: Every detection runs behind your air gap.
Zero Door
File integrity that checks legitimacy, plus software intelligence and compliance evidence, for regulated fleets. Air-gapped on-premises or EU-resident SaaS, one codebase.
Discover Zero DoorBy estate
What we found
- REInside Symbiote: malware deep dive
- Red teamAttacking kiosk devices
- Red teamWardriving, field notes
Prove it on your own servers.
A 30-minute walkthrough on a fleet like yours, or a pilot behind your own air gap. No slides.