Built for UK commercial M&E tenders

Every tender revision reconciled to the price before the bid goes out.

BidDelta turns revised tender documents into one evidence-linked working register, so estimators can see what is priced, qualified, queried—or still unreviewed.

Start the £99 pilot →See the worked example

Three founding-pilot places · £99 credited toward a future licence

TENDER REVIEWHawthorn House — Rev C
Due 22 Aug
14changes found
12resolved
2need review
ME-07

AHU schedule updated

PRICED
EL-12

Containment route revised

QUALIFIED
SP-04

Fire-stopping note added

QUERIED
DR-18

Plantroom layout Rev C

UNREVIEWED
Source: drawing M-401 Rev C · page 4Evidence linked

The expensive question is not
“Did we spot the revision?”

01

Was the change carried into the price?

02

Was it qualified or raised as an RFI?

03

Can the team prove what was checked?

A controlled pre-submission check

From revised pack to a defensible handover.

BidDelta keeps the commercial decision with your team while making the admin visible, structured and auditable.

1

Send the pack

Previous and current tender documents, pricing sheet and addenda.

Input
2

Review the delta

Relevant changes are logged with document, page and discipline references.

Evidence
3

Reconcile the price

Each item is marked priced, qualified, queried or unreviewed.

Decision
4

Hand over cleanly

Receive a concise summary of unresolved items before submission.

Control

What the evidence looks like

Every decision points back to its source.

No mystery confidence score. No black-box recommendation. The working file shows the document, page, revision, commercial action and owner.

  • PRICEDIncluded in the tender price
  • QUALIFIEDCovered by a clear qualification
  • QUERIEDRaised for clarification
  • UNREVIEWEDStill needs an estimator decision
Worked example — synthetic data
Synthetic BidDelta workbook example showing tender revisions, commercial actions and source references
Illustrative example only. Customer documents are reviewed privately.

Start now

Pick the fastest route to control.

ASSISTED SERVICE3 pilot places

BidDelta Express

£99founding pilot

We run one live tender revision review with your estimator and return the working register plus handover summary.

  • One current commercial M&E tender
  • Page-linked revision and addendum register
  • Price-reconciliation status for every item
  • Final unresolved-items handover
  • £99 credited to any future licence
Pay £99 securely →Secure checkout by Stripe · Questions first? Email us
DO-IT-YOURSELF

Revision Control Kit

£39one-off

A ready-to-use workbook for teams that want the control method without the assisted review.

  • Revision and addendum registers
  • Price-reconciliation tracker
  • RFI and qualification log
  • Handover summary dashboard
  • Worked example and quick-start guide
Buy the kit for £39 →Secure checkout by Stripe · Questions first? Email us

Human-reviewed by design

A control layer—not contractual or design assurance.

BidDelta is an AI-assisted administrative comparison. Your estimator reviews every finding and remains responsible for pricing, design interpretation, qualifications and submission decisions.

Founding pilot

Put one live revision through BidDelta before your next deadline.

Start the £99 pilot →

One-off secure payment · No subscription required