Field service software vs construction software: a UK guide

Field service software is built around the visit: an engineer, a van, a time slot and a form at the end. Construction software is built around the project: a priced scope, a contract, a programme, stage payments, variations and a final account. Both send quotes and invoices, which is why they get confused. Under the bonnet they're solving different problems.

If most of your income comes from servicing, breakdowns and planned maintenance, you want field service software, and the UK has some strong options. If most of it comes from extensions, refurbishments, fit-outs and new builds, you want construction software. If you do both, decide which side pays the bills, and read the section on mixed firms below.

The work is different, so the software is different

Field service tools are brilliant at the service visit column. They'll get the right engineer to the right boiler with a certificate ready to sign. Ask most of them to run a twelve-week extension with three variations, a 5% retention and a CIS subbie, and you'll start finding gaps.

The big four UK field service platforms

These are the names that come up when a UK contractor shops for job software. All four are capable. All four are built for field service work first.

Prices checked October 2026: Commusoft plans, Simpro blog, Joblogic pricing, BigChange and EstiMate pricing. We couldn't find BigChange's VAT basis, and Commusoft and Simpro don't publish prices. EstiMate is per business: £0, £15.99 or £39.99 a month, no contract, and those prices are what you pay. Those plans are one office login; team seats with roles are on EstiMate Corp, from £249 a month.

A line on each, with what they do well:

• Commusoft covers scheduling, dispatch, certificates and service plans, with a native reverse charge option on invoices (Commusoft blog). Office staff, managers and engineers all need a licence (Commusoft FAQs).
• Simpro is the closest of the four to project work, with progress claims, retentions and variations built in (Simpro) and a take-off tool for PDF drawings (Simpro marketplace).
• Joblogic does planned maintenance, certificates and compliance forms, and syncs live with Xero, QuickBooks and Sage 50 (Joblogic support).
• BigChange bundles job management with hard-wired vehicle tracking, and its Plus plan adds a rugged tablet or phone (BigChange). Simpro Group bought it in October 2024 (Simpro).

Where field service software is better

Be straight about this, because picking the wrong category costs more than any subscription.

• Dispatch and routing. If an office books dozens of visits a day across a fleet, you need a scheduler built for it. EstiMate isn't a dispatch or route-planning tool.
• Planned maintenance and certificates. Joblogic and Commusoft are built around repeat servicing and the paperwork that comes with it.
• Vehicles and devices. BigChange tracks vans and can supply the hardware.
• Live accounting links. Joblogic's live sync with Sage 50, Xero and QuickBooks is deeper than EstiMate's export files in Xero and QuickBooks formats.

A 30-engineer boiler servicing company should buy field service software. We'd tell them that to their face.

Where construction software is better

We searched each of the four vendors' sites in October 2026 for the things a building job runs on. Here's what we found, and didn't:

• CIS deductions. We couldn't find them at Simpro, Joblogic or BigChange, and couldn't confirm them at Commusoft.
• A building contract with e-signature. All four capture a signature on a quote or job. None had a contract builder that we could find.
• Variations. Simpro has them. We didn't find them at the other three.
• Site diary and snagging pins on drawings. We didn't find either at any of the four.
• Planning-application and tender leads. We couldn't find these at any of them.

That's not a knock on them. Their focus is the service visit. EstiMate's is the project. You price the job, send a quote the client accepts online, and turn it into a contract and programme. You run it with a site diary, RAMS, variations the client approves from a link, and snagging with numbered pins on Pro. Then you invoice, get paid by card through Stripe, and see P&L, VAT figures and the CIS register in the Accounts tab. It's all in our construction project management software, and the variations side is explained properly in our guide to pricing extras and getting paid.

Smaller job apps like Tradify and Fergus sit somewhere in between. We cover those in job management app or construction software.

If you do both

Plenty of UK firms straddle the line: a building services contractor with maintenance contracts and a few fit-outs a year, or a builder who does reactive repairs for a letting agent between extensions.

The honest rule is to run the software that matches the bigger share of your revenue and the bigger share of your risk. Service revenue is predictable and low risk per job. Project revenue is lumpy, and one badly managed variation can wipe out the margin on the whole job. If projects are a third of turnover but most of your arguments, construction software probably earns its keep. You can run the odd service visit in EstiMate as a small job; you can't easily run a twelve-week project in a tool built for visits.

If you want the head-to-head on one of these, our Joblogic vs EstiMate comparison goes through it line by line.

A five-minute test

1. Pull your last 20 invoices.
2. Mark each one as a visit or a project.
3. For the projects, count how many had a variation, a stage payment, retention or a CIS deduction.
4. If most of your 20 are visits with a certificate attached, shortlist a field service platform and ask each for a written quote, including contract length.
5. If most are projects, open a free EstiMate account (no card, no time limit, three jobs a month) and run your next one through it.

Start free and see what your projects look like in software built for them.