Bid prep for EU construction & engineering · PL + DE
You bring the tender.
The bid builds itself — and shows its work.
Bring the buyer's tender documents. The agents extract the requirements, draft the paperwork, and check what blocks submission — and show their work: every number traces back to a human or a cited source. You sign and submit, and leave with a ready-to-file package.
Upload tender documents
Drag & drop — Word, Excel, PDF, GAEB
Your data stays yours
Built for construction & engineering
Not a horizontal tender tool with a construction tab. Steinlog does one thing — public construction and engineering bids — and goes deep where they're won or lost.
GAEB & Excel BOQs
Native to the bill of quantities — GAEB DA-XML (.x83 / .x84) in Germany, Excel and .ATH in Poland. Not a generic upload box.
Civil-works consortia
Cross-company joint bids with per-partner ESPD and a hard wall between competitors — how roads, bridges and buildings actually get bid.
Signature tier, per notice
QES mandatory above the Polish threshold; Textform by default in Germany. Computed from the notice, never guessed.
Today
Right now, the bid lives in four places that can’t prove anything.
The bill of quantities in a spreadsheet on someone’s desktop.
Tender documents as email attachments — which version, nobody’s sure.
Partners coordinated over WhatsApp, phone calls, and trust.
The signature tier guessed, not computed — a wrong default voids the bid.
One room instead. Built together, gated before you submit — and you leave holding the record.
How it works
From a pile of tender docs to a signed bid — in five steps.
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Upload the tender
Drop the buyer's documents in — Word, Excel, PDF, GAEB. Steinlog reads and organises them for you.
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Understand it in minutes
Ask X-Ray anything — requirements, deadlines, the signature tier — and get answers cited to the exact clause.
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Price it — your numbers
The bill of quantities is laid out and drafted. You set every binding price: the AI proposes, you own.
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Check what blocks submission
The gate computes a single GO / NO-GO and lists exactly what's missing — so you can't submit an incomplete bid.
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Sign & submit
Leave with a sealed, timestamped, submission-ready package. You sign and submit through the portal; the receipt comes back in.
- R-7.2 SWZ §7.2 · signature tier QES required
- BOQ 1.2 Foundations · € 4 200 human · estimator
- EVT 0242 draft · cover letter ai · grok-4.3 · b17d04…
- PKG ASiC-E · manifest sealed QTSP ✓ · receipt ✓
- ASiC-E · manifest sealed
- QTSP · qualified timestamp
- Portal receipt · ingested
What you leave with
A sealed package
ASiC-E manifest, qualified timestamp, and the portal receipt — the artifact you can hand a tribunal.
A walkable record
Every line traces to who set it, the clause it cites, and the version it supersedes.
A computed gate
The signature tier and every blocker computed per notice — never guessed.
03 · Bid room
Same room. Expanding radius.
“Solo” was never single-user — it was single-company. A bid is a team sport from the first hour, and the same room widens to your partners when you consortium up.
See how it worksPartners
- ML Mostostal Łódź S.A. Lead
- TF Tiefbau Frankfurt GmbH Partner
Priced by
- BOQ 1.2 · Foundations € 4 200 ML
- BOQ 2.1 · Steel superstructure Confidential € •••• TF
- BOQ 3.4 · Deck & waterproofing Confidential € •••• TF
Trust shelf
EU-pinned
Never on your data
Hash-chained · attributed
eIDAS AdES / QES
ISO 27001 — on track
03 · Questions
Do you submit the bid for us?
No. We assemble, validate, and package; you sign and submit through the official portal. We ingest the receipt back — submission stays a human act.
Does the AI set our prices?
Never. The AI proposes and overlays; every binding price is a human event, enforced at the database layer.
Where is our data?
EU-pinned end to end — storage, compute, logs. Your confidential pricing never leaves EU infrastructure, and we don’t train models on your data.