Looking for a Gas Engineer Software alternative?
Gas Engineer Software is well-liked, gas-specialist software — if you’re heating-only and happy, it serves you well. The CertBox case is simple: unlimited certificates for £0 instead of £19+/user/month, invoicing included free instead of from the £23 Core tier, and one app that also covers electrical, fire safety and plumbing work.
What each costs
GES includes certificates on all plans — the cheapest is £19 per user per month (£18 on annual billing). Prices exclude VAT. Gas Engineer Software prices read from their public pricing page on 15 July 2026. Check it yourself — if it has changed, tell us and we will correct this page.
What that means per year
Sole trader, certs only
GES Starter: £216–£228/year · CertBox Free: £0
Sole trader, certs + quoting + invoicing
GES Core: £276/year · CertBox Free: £0 (or Pro £119/year with branding + auto reminders)
Why people switch
- Unlimited certificates on the CertBox free plan — GES starts at £19/user/month.
- Quoting, invoicing and card payments are free in CertBox; GES includes them from the £23 Core tier.
- One app for every trade you work in: CertBox covers gas, electrical (including EICRs), fire safety and plumbing. GES is gas, oil and heating only.
- QuickBooks and Xero sync is in CertBox Pro (£14.99/mo) — GES charges £30/user/month for its integrations tier.
Where Gas Engineer Software is stronger
An honest comparison cuts both ways. Stay with Gas Engineer Software if these matter to you:
- A decade-plus of gas-specialist focus, with depth in heating-trade record types.
- A well-reviewed, UK-based phone support team.
- If you never touch other trades and cost isn’t a concern, GES is genuinely good software.
Switching takes an afternoon, not a weekend
1. Export your clients from Gas Engineer Software as a CSV.
2. Import it in CertBox: Clients → Import CSV. Match your columns to ours — any export format works.
3. Or skip both steps: email the export to paddy@certbox.app and the founder sets your account up for you, usually within a day.
And if CertBox isn’t for you, everything exports back out. Read the CertBox data promise.