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Muster vs Gas Engineer Software: Full Comparison for UK Gas Engineers

Muster and Gas Engineer Software both serve UK gas engineers. Gas Engineer Software (used by 6,000+ businesses) focuses on gas certificates (CP12s), Gas Safe tracking, invoicing, and job scheduling at £18-30 per user per month. Muster starts at £179/month flat rate and includes everything Gas Engineer Software does — CP12 generation, Gas Safe tracking, quoting, invoicing, scheduling — plus AI receptionist (24/7 call answering), GPS fleet tracking, RAMS generation, training platform, call recording, AI bid writing, customer portal, WhatsApp messaging, Pay by Bank, subcontractor management, and FM capabilities. For a team of 5 engineers, Gas Engineer Software costs £90-150/month while Muster costs £179/month with 10× more features. Last updated: March 2026.

Comparison

Muster vs
Gas Engineer Software

Gas Engineer Software does certificates and invoicing for 6,000+ UK businesses. Muster does everything they do — plus AI receptionist, GPS tracking, RAMS, training, and call recording.

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Why gas engineers switch

Gas Engineer Software is great for certificates. But your business needs more than certificates.

Missed calls

You're under a boiler when the phone rings. AI Receptionist catches every call, 24/7.

No GPS tracking

For multi-van operations, you need to know where your engineers are. Muster shows live locations.

Five apps for one business

Cert app + scheduling app + GPS + answering service + RAMS templates. Muster replaces all five.

Feature comparison

Gas Engineer Software matches on 5 features. Muster has 10 more.

FeatureMusterGES

Gas safety certificates (CP12)

Both generate CP12s from job data

Gas Safe & ACS tracking

Both track Gas Safe registrations

Quoting & invoicing

Both send professional quotes and invoices

Job scheduling

Both offer calendar-based scheduling

Mobile app

Both have iOS and Android apps

AI receptionist & call recording

24/7 call answering — never miss a boiler breakdown

GPS fleet tracking

Live van locations, route history, mileage

Built-in RAMS generation

Risk assessments in 2 clicks

Training platform

Videos, quizzes, certs per engineer

AI Bid Writer

Win commercial gas contracts with AI-written tenders

Customer portal

Customers book services and view certs online

WhatsApp Business messaging

Job updates via WhatsApp

Pay by Bank (0.7% + 30p)

Cheaper than card fees for on-site payments

Subcontractor management

CIS verification and sub portal

FM capabilities

Multi-site, SLAs, planned maintenance

Pricing at different team sizes

Gas Engineer Software is per-user. Muster is flat rate.

TeamGES Pro (£30/user)MusterExtra features in Muster
1 engineer£30/mo£179/moAI, GPS, RAMS, training, calls
3 engineers£90/mo£179/moAll the above for the whole team
5 engineers£150/mo£179/moOnly £29/mo more for 10× the features
10 engineers£300/mo£349/moMuster is CHEAPER at this size

Muster vs Gas Engineer Software — frequently asked questions

Can Muster do everything Gas Engineer Software does?+
Yes. Muster generates CP12 gas safety records, warning notices, and tightness test certificates. It also tracks Gas Safe registration, ACS categories, and expiry dates for every engineer. Plus it adds AI receptionist, GPS fleet tracking, RAMS generation, training platform, call recording, bid writing, customer portal, and WhatsApp messaging — none of which Gas Engineer Software offers.
How much does Gas Engineer Software cost vs Muster?+
Gas Engineer Software charges £18-30 per user per month. For a sole trader that's great value for certificates alone. For a team of 5, it's £90-150/month. Muster Starter is £179/month flat rate for up to 9 people, but includes everything Gas Engineer Software does plus GPS, AI receptionist, RAMS, training, compliance, and call recording. Most gas businesses with 3+ engineers find Muster cheaper per feature.
Can I migrate my certificates from Gas Engineer Software?+
Yes. Muster offers a white-glove migration. Your customer records, job history, and certificate data are imported. You can export from Gas Engineer Software and we handle the import — typically completed in 1-2 weeks.
Does Muster work for sole trader gas engineers?+
Absolutely. The AI receptionist is especially valuable for sole traders — it answers calls when you're on a boiler, books the job, and texts you the details. No more missed calls while your hands are full. Even our Starter plan is affordable for sole traders who want to stop juggling five separate apps.
Does Muster track Gas Safe and ACS qualifications?+
Yes. Muster tracks Gas Safe registration numbers, ACS categories (CCN1, CKR1, CENWAT, etc.), and expiry dates for every engineer. You get alerts 90 days, 30 days, and 7 days before any qualification lapses. For businesses with multiple engineers, the compliance dashboard shows everyone's status at a glance.

Last updated: March 2026

Certificates are one feature of fifty

See what happens when your cert app also answers calls, tracks vans, generates RAMS, and wins tenders.

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