Quick Lead vs Gas Engineer Software — certificates + invoicing for £10 flat, not £30 per user.

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GES prices per user, ex-VAT — Starter £18/user/month (on the annual plan; £19 month-to-month), Core £23, Pro £30 (as of July 2026). That's a fair model for a growing gas firm: each engineer gets their own login, schedule and rights.

But if you're a one-person band, "per user" is just your price — and the plan most engineers actually want, the one with Xero, QuickBooks and Sage sync, is GES Pro at £30/user/month before VAT. Quick Lead Pro is £10/month flat and includes every certificate type plus Xero-format CSV export. On that like-for-like, one-person comparison that's about £240 a year (before VAT) staying in your pocket.

That said — and this matters — the £30 GES Pro plan buys you things Quick Lead simply doesn't have yet: analyser Bluetooth import, native accounting sync and Crezco online payments. The honest question isn't "which is cheaper" (Quick Lead is); it's "do you need what the extra £20 buys". Both trials run 14 days, so the cheapest way to settle it is to run both for a fortnight on real jobs.

Credit where it's due, and this is the biggest single reason to pick GES: flue gas analyser Bluetooth import. On GES's integrations page you tap "Import Readings" while building a certificate and your analyser's numbers sync straight in over Bluetooth — with the calibration date captured — from Kane, TPI and Anton analysers (as of July 2026). No transcribing combustion figures, no transposed digits, no missing zeros.

Quick Lead has no analyser integration at all. You read the CO, CO₂ and ratio off your analyser and type them into the CP12 by hand. We're not going to dress that up: if Bluetooth analyser import is a must-have for how you work, GES has it and Quick Lead doesn't.

Where Quick Lead does help on the certificate is the appliance data plate: photograph it and the AI data-plate scan fills make, model, GC number, serial and type into the CP12 appliance row, so you're not retyping a smudged label by torchlight. Different part of the job — but it's the one bit of certificate data entry we've automated.

Most sole-trader work arrives as an email — a landlord, a letting agent, a Checkatrade or MyBuilder lead notification. This is where Quick Lead was built to start. Your dedicated [email protected] address is read by AI, which extracts the contact name, address, phone number, urgency and dates and drafts the job card for you — you confirm with one tap.

GES is strong at what happens after a job is on the books — reminders, chasing, analyser import, accounting. As of July 2026 we found no mention on gasengineersoftware.co.uk of AI parsing inbound lead emails into jobs. If they add it, we'll update this page. It's the one area where the newer tool is arguably ahead.

Getting leads from the platforms? See how the parsing works with Checkatrade leads, MyBuilder leads and letting-agent emails.

Analyser import. Bluetooth import of combustion readings from Kane, TPI and Anton analysers, straight into the certificate with the calibration date. Quick Lead has nothing like it. For many gas engineers this alone decides it.

Accounting. Native sync of customers, invoices and payments with Xero, QuickBooks and Sage on the Pro plan is better than Quick Lead's CSV export. If your bookkeeping runs through Xero daily, this matters.

Getting paid. GES's Crezco integration puts a QR code or pay-online link on every invoice for a flat £1 per invoice, so a customer can pay online and the money lands in your account. Quick Lead lets you invoice, track overdue bills and fire off an AI-drafted chaser — but you can't yet collect the money inside the app.

Automatic customer messaging. Automatic service reminders (on by default) and automatic invoice-payment chasing go out to your customers on your behalf. Quick Lead deliberately reminds you instead — an in-app banner before each CP12 or EICR is due — so you decide when the customer hears from you. If you want fully unattended customer emails, that's a point to GES.

Maturity & scale. GES's homepage says it's trusted by 7,000+ businesses and it's a well-established gas specialist. Quick Lead is newer, founder-run, with a small user base. We think that's a feature (you email [email protected], the person who built it replies) — but it's only fair to say it out loud.