Tenders
NL Groot onderhoud Kunstwerken Civiel — closes 8 Jan NL Elektrificatie pompstation Markelo — closes 16 Dec NL Dijkversterking Venlo 't Bat — closes 11 Dec NL 31215382: Vervangen aandrijflijnen bovenstroomse schuif Hollandsche IJsselkering — closes 17 Feb NL DWZ Wranghe – Realisatie WTB — closes 2 Dec NL Selectie uitvoerende partijen bibliotheek Schalkwijk, — closes 11 Dec NL WMO woningaanpassingen 2027 — closes 7 Jan NL Nieuwbouw en verbouw KC Meeuwensingel — closes 30 Nov NL Raamovereenkomst Migratie regeltechniek in & aan het Amsterdam UMC v3 — closes 11 Nov NL Groot Onderhoud VRI's 2027-2030 — closes 7 Dec NL Raamovereenkomst Duurzaamheid en EML-maatregelen — closes 9 Dec NL 43201 | Vervangen noodverlichting Walterboscomplex en Quintax te Apeldoorn — closes 6 Nov NL Groot onderhoud Kunstwerken Civiel — closes 8 Jan NL Elektrificatie pompstation Markelo — closes 16 Dec NL Dijkversterking Venlo 't Bat — closes 11 Dec NL 31215382: Vervangen aandrijflijnen bovenstroomse schuif Hollandsche IJsselkering — closes 17 Feb NL DWZ Wranghe – Realisatie WTB — closes 2 Dec NL Selectie uitvoerende partijen bibliotheek Schalkwijk, — closes 11 Dec NL WMO woningaanpassingen 2027 — closes 7 Jan NL Nieuwbouw en verbouw KC Meeuwensingel — closes 30 Nov NL Raamovereenkomst Migratie regeltechniek in & aan het Amsterdam UMC v3 — closes 11 Nov NL Groot Onderhoud VRI's 2027-2030 — closes 7 Dec NL Raamovereenkomst Duurzaamheid en EML-maatregelen — closes 9 Dec NL 43201 | Vervangen noodverlichting Walterboscomplex en Quintax te Apeldoorn — closes 6 Nov

03 — Time travel & attribution

The bid, as of
any moment.

Come back from two days on site and see exactly what moved. Steinlog keeps the full history of the bid — every version of every document, every reassignment, every price change — attributed to a person and a time, and lets you replay it to any point.

The bid as of 2026-03-26 · 15:51 sample project

BID VERSION

v2.6

DOCUMENTS

61

OPEN TASKS

0

CHECKLIST

14/14

Every requirement complete. Submitted a day ahead of the moved deadline.

The same view, in the product demo project · live tender data
The time travel view in the product: the demo bid replayed to event #22 of 39 — the readiness check had not been run yet at that point, and every document is listed at its version with its sha256 hash.

Who, what, when

Managers don't ask.
They look.

“Who moved the pile spec?” “When did the partner see the BOQ?” On a bid worth millions, these aren't accusations — they're the questions a lead has to answer. Steinlog answers them from the record, not from memory.

The provenance log — every event, attributed demo project · live tender data
The provenance timeline: hash-chained events #24 to #39 — tasks created, assigned and completed, ending in a readiness check that failed — each attributed to a person or the system, with a timestamp and a chain hash.

Captured from a working demo bid room on live tender TN-431836. The readiness check failed here, on the record — that is the point: nothing fails silently.

Full history export

The whole bid,
in one archive.

Every version, change and access, exported as a single archive — for a clean handover to the delivery team, an internal audit, or the procurement dispute you hope never comes. The history is kept append-only, so the export reflects what actually happened, in order.

export · N2 Ring Road — Lot 4 ready
  • event log 2,847 entries
  • document versions 61 files · 214 revisions
  • access log incl. partner reads
  • completeness results 14/14 at submission

Delivered as a downloadable archive. Litigation is the rare case — the common one is a manager who wants the full picture in five minutes.

Time travel

Stop reconstructing
what happened.

See it replay on one of your own past bids. Bring the files; we'll load them.

ennl