- 1. OVERVIEW
- 2. BigChange vs GES for heating & plumbing
- 3. What are the key differences?
- 4. GES is focused on heating & plumbing
- 5. GES has tools made for heating engineers
- 6. GES offers transparent pricing and an easy setup
- 7. FEATURE COMPARISON
- 8. Between BigChange and Gas Engineer Software, what’s right for your heating business?
- 9. Moving from BigChange?
- 10. Start your free trial
- 11. Ask us to import your data
- 12. Quick & easy onboarding
- 13. IN DETAIL
- 14. Where GES wins as the heating business platform
- 15. GES is easy to set up and transparent with their pricing
- 16. Import readings from your flue gas analyser into gas certificates
- 17. 2,300+ boiler manuals available to reference on the app
- 18. Tools & calculators made for heating engineers
- 19. GES is more than a tool. It’s a proven way to run your heating business
- 20. How to know which one actually fits your business
- 21. You’re running an enterprise, multi-trade business
- 22. Heating and plumbing is the whole business
- 23. TRY GES FOR FREE
- 24. Try GES for free
- 25. BigChange vs Gas Engineer Software: FAQs
- 1. OVERVIEW
- 2. BigChange vs GES for heating & plumbing
- 3. What are the key differences?
- 4. GES is focused on heating & plumbing
- 5. GES has tools made for heating engineers
- 6. GES offers transparent pricing and an easy setup
- 7. FEATURE COMPARISON
- 8. Between BigChange and Gas Engineer Software, what’s right for your heating business?
- 9. Moving from BigChange?
- 10. Start your free trial
- 11. Ask us to import your data
- 12. Quick & easy onboarding
- 13. IN DETAIL
- 14. Where GES wins as the heating business platform
- 15. GES is easy to set up and transparent with their pricing
- 16. Import readings from your flue gas analyser into gas certificates
- 17. 2,300+ boiler manuals available to reference on the app
- 18. Tools & calculators made for heating engineers
- 19. GES is more than a tool. It’s a proven way to run your heating business
- 20. How to know which one actually fits your business
- 21. You’re running an enterprise, multi-trade business
- 22. Heating and plumbing is the whole business
- 23. TRY GES FOR FREE
- 24. Try GES for free
- 25. BigChange vs Gas Engineer Software: FAQs
BIGCHANGE ALTERNATIVE
BigChange vs
Gas Engineer Software
BigChange is a large field service platform made for multi-trade businesses. Gas Engineer Software is built specifically for heating & plumbing.
Where BigChange can be configured for gas businesses, GES is gas-native with workflows designed around the work a UK heating & plumbing business does.
OVERVIEW
BigChange vs GES for heating & plumbing
What are the key differences?
-
1
GES is focused on heating & plumbing
Where BigChange is made for all the trades, Gas Engineer Software is built for heating & plumbing, and nothing else.
This means the app is designed to work the way you work, isn't cluttered with features for other trades, and stays cost-effective.
-
2
GES has tools made for heating engineers
From a gas rate calculator to a pipe sizing calculators and even 2,300+ boiler manuals with boiler AI Assist, GES is genuinely useful for the engineer out on the tools.
Combine this with all the certificates, scheduling, quoting, and invoicing being done in the same job management app.
-
3
GES offers transparent pricing and an easy setup
BigChange requires you to get in touch to learn more about their pricing plans and how much they cost.
GES shows everything on the pricing page, and has a simple setup with a 14-day free trial you can start yourself in seconds.
FEATURE COMPARISON
Between BigChange and Gas Engineer Software, what’s right for your heating business?
Where the two line up (as of September 2026).
| Features | BigChange | Gas Engineer Software |
|---|---|---|
| On the tools | ||
| Built for heating & plumbing | Multi-trade, general FSM | |
| UK gas & oil certificates | ||
| Flue gas analyser integrationReadings straight into the certificate | Kane, Anton & TPI | |
| Boiler manuals in the app | 2,300+ manuals | |
| AI boiler assistant | ||
| In-app gas rate calculator | ||
| In-app pipe sizing calculator | ||
| Saved appliance detailsPre-filled on the next visit | ||
| Getting paid | ||
| Quotes, estimates & invoices | ||
| Take payment on site | Crezco | |
| Payment feeWhat it costs to get paid | Not published - custom contracts | £1 flatAny invoice size |
| Xero integration | ||
| Sage integration | ||
| QuickBooks integration | ||
| Running the business | ||
| Scheduling & calendar | ||
| Job management | ||
| Customer management (CRM) | ||
| Team & user management | ||
| Automated service reminders | ||
| Vehicle tracking & timesheets | ||
| Customer portalCustomers log in to track jobs | ||
| Subcontractor management | ||
| Trying it, and paying for it | ||
| UK-based support team | ||
| Simple setup process | Must go through their demo & support channel | Free to try in minutes |
| Free trialUse it before you commit | Demo only | 14 days, no card |
| Price | Not published | £18–£31Per user, per month |
| Minimum contract term | Set in your contract | NoneCancel any time |
| Try GES today: Start free trial |
Compiled from bigchange.com and gasengineersoftware.co.uk, September 2026. BigChange does not publish prices, plan names or contract terms — ask them directly. Both companies change their products, so check before you decide.
Moving from BigChange?
We can help you import all your data and get started without hassle. Just let us know as you sign up and we’ll get you sorted.
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Ask us to import your data
Send us your customers, addresses, and service dates and we’ll bring it all across for you in one go.
Quick & easy onboarding
There's no need for a complex onboarding and setup process. If you need help, our UK support team is always available to help.
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IN DETAIL
Where GES wins as the heating business platform
Both GES and BigChange are solid job management software options, but GES wins for it’s heating & plumbing-specific approach and ease of setup. GES treats gas & oil work as a core part of the workflow, with tools that help engineers in the field.
GES is more than a tool. It’s a proven way to run your heating business
Easy to use & set up
It takes minutes to set up & learn Gas Engineer Software.
Grows with your business
Add users as you grow, and manage teams effectively.
Reliable & proven system
Save hours & fill your diary with repeat work from reminders.
How to know which one actually fits your business
You’re running an enterprise, multi-trade business
- You run a fleet, and want vehicle tracking, driver behaviour and dashcams in the same system
- Risk assessments and method statements are part of every job you do
- You push work out to subcontractors and need to manage that network
- You need a REST API to wire it into the rest of your systems
Heating and plumbing is the whole business
- Heating & plumbing is what you do, not just a department
- You want a no-fuss software that gives you exactly what you need
- You value tools made for heating engineers like boiler manuals, calculators, and FGA integrations
- You want to get up and running fast, not go back and forth to work out a contract
- You value flexible, transparent pricing
TRY GES FOR FREE
Try GES for free
Try GES, create certificates, and more in a 14-day free trial. Learn more about switching to GES.
- Try every feature during your trial
- Ask us to import your customers
- Free onboarding call included
- No credit card required
BigChange vs Gas Engineer Software: FAQs
Anything we haven't covered? Talk to our team.
What is the main difference between BigChange and Gas Engineer Software?
BigChange is multi-trade software. It covers multiple industries and carries a lot of enterprise machinery with it: fleet telematics, driver behaviour, subcontractor networks, method statements.
Gas Engineer Software is built for UK heating and plumbing businesses and nothing else. If what you want is a straightforward way to run a job from the first quote, through the certificate, to the final invoice, that's the whole product here rather than one module of something much bigger.
Do BigChange offer a trial like GES?
No. BigChange runs on demos and quotes — you book a call, get shown round the system, and get a price back afterwards. There's no self-serve trial to sign up for.
GES is 14 days with every feature and no card details. You can sign up now and issue a real gas safety record on your next job without any complex processes. Demos and training are still available for free.
Is BigChange or GES more cost-effective for a heating & plumbing business?
We can only answer half of that honestly. BigChange doesn't publish pricing, so the only way to find out what you'd pay is to request a quote and see what comes back.
GES is £18 to £31 per user a month, on the pricing page, with no setup fee and no minimum term. For a heating or plumbing business the honest question is what you'd actually use — a platform built around fleet telematics and subcontractor management is a lot of software to be paying for if what you need is certificates, scheduling and invoices.
Do you need to purchase a plan to try GES?
No. The 14-day trial needs no card details and no plan picked up front. You get every feature for the trial, including the certificates, scheduling, invoicing and the boiler manuals.
If it doesn't suit the way you work, do nothing and it stops on its own. Nothing to cancel, nothing taken.
What is the setup process like with GES?
Minutes rather than weeks. Sign up, add your company details and logo, and you can issue a certificate the same afternoon — there's no implementation project and no templates to build first.
There's a free onboarding call if you'd rather be walked through it, and our UK team will help bring your existing customer list across so you're not retyping anything. Phone, email and message support comes with every plan, not just the top one.