Estimating services, a freelance QS or AI estimating? An honest comparison
Updated
If you are weighing up estimating services or a QS (freelance, per-tender, or a part-time hire) against AI estimating, here is the comparison without the sales gloss: Nexley replaces the measurement and bill-production work that makes up most of what small contractors actually buy from a QS, on a flat monthly subscription instead of a fee per tender. It does not replace contractual advice or dispute work, and this page says so plainly.
- Honest scope, stated below
- Flat monthly, not per bid
- 7-day free trial
What you are actually buying when you buy QS time
For most subcontractors and small main contractors, the invoice from a QS or an estimating service covers a familiar bundle: take-offs measured from the drawings, a bill of quantities assembled to NRM2, rates applied, and the tender documents brought to a standard a main contractor's commercial team will take seriously. It is skilled work — and it is also, overwhelmingly, measurement and document production rather than judgement. One contractor we work with paid £1,200+VAT for exactly that bundle on a single tender, and the bid lost. The fee was owed regardless.
That is the structural problem with per-tender QS fees: the cost scales with how often you bid, so the fee itself becomes a reason to bid less — which is backwards for a firm trying to grow.
Side by side, fairly
| The work | External QS or estimating service | Nexley |
|---|---|---|
| Take-offs from drawings | Yes — days of turnaround, priced per tender | Yes — same day, itemised and traceable to each drawing, unlimited tenders |
| NRM2 bill of quantities | Yes | Yes — priced from your own rates, reviewed by you |
| Tender document assembly | Yes | Yes, including drafted quality and social value answers |
| Contractual advice, claims, EOT disputes | Yes — this is where a chartered QS earns the title | No. Engage a professional; Nexley keeps the records tidy |
| Cost | Per tender or per day, win or lose | Flat monthly, everything included, win or lose |
What Nexley honestly does not do
A good QS is also a commercial adviser: interpreting JCT and NEC terms, valuing loss and expense, fighting an extension of time claim, standing behind a final account negotiation with professional weight. Nexley does none of that, and a page that claimed otherwise would deserve your distrust. If your work involves regular contractual disputes or complex claims, you will still want a professional on call — you will simply stop paying professional rates for measurement. What Nexley gives that arrangement is better raw material: measured quantities, approved variations and a clean paper trail, which is what your QS would have asked you for anyway.
The practical middle ground most firms land on
Bring the routine estimating in-house with AI tendering and estimating and take-offs, bid on more work because losing no longer carries a fee, and keep a chartered QS for the moments that genuinely need one. The economics are covered further in our guide to quantity surveyor cost — and the trial means you can run a live tender through Nexley before deciding anything.
Run a real tender through itRun one tender through Nexley first
7 days free, then £799 a month. No contract.
Does what it says really. Compared to what I'd have to pay someone to do everything they're looking after, it's worth it.”
