Security & data residency

Your bid never leaves the EU.

Confidential pricing is the most sensitive thing you’ll put in Steinlog — so the whole system is EU-pinned, and built to keep your data yours.

Trust shelfPosture · last reviewed 2026·06·20

Data residencyEU-pinnedDatabase · file storage · real-time · logs · AI inference

Model trainingNever on your dataAI scoped to a single bid; EU-resident inference

IsolationRow-level securityCompeting bidders hard-isolated · graded, opt-in inside a consortium

IntegrityHash-chained · attributedAppend-only; sealed with a qualified timestamp at submission

SignatureseIDAS AdES / QESTier computed per notice, never defaulted

CertificationISO 27001 — on trackDPA + subprocessor list before any real bid data

Honest posture: the log is tamper-evident, not tamper-proof — the legally-probative claim attaches to the timestamped, signed package. A full DPA and subprocessor list will be published before any real bid data is processed.

Build the first provable bid with us.

We’re onboarding a handful of Polish and German construction firms as design partners. Bring a live tender; we’ll build the loop around it.

Become a design partner

EU-hosted, end to end
No model training on your data
eIDAS-ready — AdES default, QES on demand
No sales call to start