For main contractors · £2m to £50m

What happens to your tender the day you win the job?

In most firms, someone re-keys it. The bill becomes a new spreadsheet, the quotes go back into an inbox and the programme is rebuilt from scratch. ConstructEther carries one record from tender pack to final account, in the office and on site through the app, with AI doing the drafting and your team approving every step.

Let us show you a platform that never stops evolving, and help shape what it becomes.

No migration of live projects Beta access for Founding Partners only
5
Engines on one record
1
Record, tender to final account
45
Years inside commercial teams
3
Main contractor places open
The rollout, dated

Four places a main contractor loses margin, and the engine that closes each.

Tender EnginePartner beta

Senior hours spent measuring before you know the bid is worth it

Reads the whole pack and lists the gaps as RFIs before anyone prices. Take-off with the working shown, a bill of quantities grounded in NRM2 against your own rate libraries, enquiries out and quotes levelled line by line. We never supply the rates and never price the job for you.

Commercial EngineBeta Nov 2026

A CVR that describes a month already gone

The tender becomes the budget, so cost control, subcontract orders, applications, payment and pay-less notices, variations and the final account all run from the bill you priced.

Project & Document ManagementBeta Nov 2026

Site and office working from different numbers

Site diaries, progress and programmes captured on the phone. Drawing and document registers, RFIs and instructions controlled in one place, against the same record the commercial team uses.

Compliance EngineBeta Nov 2026

Gateway evidence assembled after the fact

Building Safety Act golden thread architecture, designed-in: versioned, hash-verified documents and an audit trail on every AI call, captured as the work happens. We do not certify compliance.

One project record

Measured once. Carried all the way to the final account.

The quantity your estimator approves at tender carries into the contract, the budget and the programme, is tracked on site through the diaries, drives the CVR, prices the variations, settles the final account and sits in the evidence. Nothing re-keyed. Nothing rebuilt.

  1. 01
    Tender
    Measured and priced
    Tender Engine
  2. 02
    Contract
    Won, signed and set up
    Commercial Engine
  3. 03
    Budget
    The bill becomes the budget
    Commercial Engine
  4. 04
    Programme
    Built from the tender, tracked on site
    Project Management Engine
  5. 05
    Site records
    Diaries, progress and capture from the phone
    Project Management Engine
  6. 06
    CVR
    Current, not a month old
    Commercial Engine
  7. 07
    Variations
    Priced against the original measure
    Commercial Engine
  8. 08
    Final account
    Agreed from the same numbers
    Commercial Engine
  9. 09
    Evidence
    Captured as the work happens
    Compliance Engine

It replaces the joins between Bluebeam, CostX, Microsoft Project, Procore, SharePoint and the CVR spreadsheet, where a quantity gets re-keyed under deadline.

On site, in the app

Site records captured where the work happens, on the phone in your pocket.

The ConstructEther app puts the site side of the job on the phone: diaries, photos, progress and approvals, all landing on the same project record the commercial team works from. No second system, no end-of-week upload, nothing typed twice.

  • Site diariesLogged on site each day, against the job, not typed up at the end of the week.
  • Photos and site recordsTaken on the phone and filed straight to the project record, where the commercial team can find them.
  • Progress against programmeUpdated from the site and seen in the office the same day.
  • Approvals and instructionsReviewed and signed off on the phone, with the same audit trail as the desktop.
  • Drawings and documentsThe current revision in your pocket, not last month's printout.
  • Access by roleEach person on site sees what their role needs, and nothing more.
Beta Nov 2026Same login, same record, same role-based access as the desktop.

Illustrative interface

The demo

A real tender, priced end to end, in thirty minutes.

No slides. We run a tender already priced in ConstructEther, the one closest to your type of work, with every function working. Your own tender is priced with you in week one of onboarding.

Book a 30-minute demo
  1. 0–3Minutes
    Your numbers
    Tenders a month, estimators, tools, and the last tender that went out late.
  2. 3–18Minutes
    The Tender Engine, end to end
    Pack analysis and the RFI list, take-off with the working shown, the NRM2 bill against a rate library, enquiries out and quotes levelled, the programme and the tender workbook.
  3. 18–24Minutes
    The won job, carried into delivery
    The Commercial Engine, the Project Management Engine and the mobile app, running on the same record.
  4. 24–27Minutes
    Who approves, who sees what
    Human approval on every output, role-based access, the AI request log and the three agent levels.
  5. 27–30Minutes
    A start date
    Founding Partner terms, and a proposal in your inbox within 48 hours.
Humans decide

AI does the admin. You make the call.

ConstructEther reads the pack, measures the drawings and drafts the bill, the letters and the CVR. Nothing leaves it until a named person on your team has checked it and signed it off, and every step sits on the record.

1
AI drafts
Take-offs, bills, levelled quotes, RFIs and letters, with the working shown.
2
Your team checks
Queries raised and answered against the drawing the number came from.
3
A named person approves
Nothing reaches a submission, an application or a pay-less notice without sign-off.

Illustrative interface

Your rates, tenders and margins, held the way a commercial director would want them.

Access by role

Estimators see the packages they price. A subcontractor sees only its own enquiry. Directors see margin and risk.

UK or EU residency

Each customer's data held in UK-only or EU-only regions, set per account.

Never used to train AI

Your rates, tenders and margins train nobody's model, ours included.

Every AI request logged

By token, document and user, and exportable by you whenever you ask.

Encrypted throughout

In transit and at rest, across every engine and the mobile app.

Always yours to take

Full export of your live data, free, at any time.

AI agents that take on more, never the sign-off.

Level 1 · Ask

Answers questions from the live record: where a drawing sits, what a package is running at, what changed this week.

Level 2 · Act

Files documents, updates registers and drafts RFIs and letters, each waiting for your approval.

Level 3 · Delegate

Takes tasks from the task board, from a take-off to a CVR draft, each held for human verification before issue.

Any output containing rates, quantities or a contractual position is a draft until a quantity surveyor approves it.

Why start before full launch

The record builds one job at a time. Start now and, while others are still deciding, yours is already running.

There is no migration of live projects, by design. Each new tender starts in ConstructEther and stays there, so the record you hold at full launch is the record you started building. Until then, the only way in is a Founding Partner place.

Week 1

Your own first live tender, priced

Rate libraries, bill templates, users and roles set up, then a live tender from your pipeline run through the Tender Engine with us on the call.

Week 4

Your first won job in the Commercial Engine

The bill becomes the budget. Quotes, programme and subcontract orders carry across without a quantity typed twice.

Week 6

Your supply chain on the portals

Subcontractors receive enquiries and submit quotes and applications on free portal seats. Clients see a live cost position.

Founding Partner terms, until the places are filled

Five main contractor places · 3 open
5
Staged payments

One on signature, then one as each part goes live. Nothing is paid for a part before it works.

25%
Below list, for life

From month nineteen, for as long as you remain a customer. The only discount we offer.

7%
Annual rise cap

List prices rise at full launch in Q1 2027. Customers already on the platform are capped.

Built by operators

Forty-five years inside commercial teams, built into the record.

JE
John Ellis
Founder and Chief Executive

Twenty-five years in UK construction, starting on the tools before qualifying as a quantity surveyor. Thirteen of those years in commercial roles across Mace, Morgan Sindall, Esh Group, Elliott and Modulaire, and Lindum, delivering in excess of £275 million of construction works. He founded ConstructEther to give main contractors one record from tender to final account, instead of stitching seven tools together and hoping they talk to each other.

AE
Andrew Elsworth
Co-Founder and CFO · MCIOB

Over twenty years from trainee surveyor to Commercial Director, across subcontractor and main contractor tiers. He co-founded a contracting business and scaled it to £5m turnover in three years, and now runs his own commercial and project management consultancy. Andrew pressure-tests every commercial workflow in the platform, preconstruction through final account.

The questions you will ask

Straight answers, no vendor waffle.

If your question is not here, we will handle it on the demo call. No script, no offer to check with the team.

When can we use the whole platform?
The Tender Engine is in beta with our Founding Partners now. The Commercial, Project Management, Document Management and Compliance Engines and the mobile app enter beta in November 2026. From there the platform keeps evolving, release by release, and Founding Partners help decide what comes next. They start on the Tender Engine, and each engine switches on in their account as it enters beta.
Does it work on site, or only in the office?
Both. The ConstructEther app puts site diaries, photos, progress, approvals and the current drawings on the phone, and everything captured on site lands on the same project record the office works from. The app enters beta in November 2026 alongside the Project Management Engine.
Do we have to move our live projects across?
No. Live projects finish where they are. New tenders start in ConstructEther and stay there, so the record is clean from the first page of the pack, and you never pause bidding to adopt it.
Will you price one of our tenders before we sign?
The demo shows a tender like yours priced end to end. Your own is priced with you in week one of onboarding, and under Founding Partner terms you pay for each part only once it works.
What does it cost?
While places remain, Founding Partner terms apply: staged payments tied to go-live, then 25% below list for as long as you are a customer. Published tiers follow at full launch. Client and supply-chain seats are free on every tier.
How does it work with our accounts system?
ConstructEther is the commercial layer, not the accounts ledger. Your finance team keeps the ledger it knows. Integrations with the major UK packages are on the roadmap rather than available today. Bring your system to the demo and we will tell you plainly where it sits in the plan.
How is our data handled?
Access is role based, with encryption in transit and at rest. Your data is held in UK-only or EU-only regions, it is never used to train a model, and every AI request is logged by token, document and user, exportable by you. You can take a full export of your live data at any time, free.
Can I trust a number the AI produced?
Every quantity carries its working, traced to the drawing it came from. Nothing is committed on your behalf. Any output containing rates, quantities or a contractual position is a draft until a quantity surveyor approves it.
Five main contractor places · 3 open

Start on your next tender, before full launch.

Thirty minutes, no slides, a real tender priced in front of you. If it fits, your own goes live in week one.

Founding Partner terms close when the places are filled.