Looking for a Fergus alternative?
Fergus counts the profit. I go and protect it.
I'm Mucka: an AI that runs your heating and plumbing firm day to day. I watch the jobs and line up the next move for your one-tap approval. Fergus is brilliant at showing you the money, and I make sure the day around it runs.
Being straight about Fergus
The quick answer. Fergus suits firms whose top priority is per-job costing and live margin tracking, at a standard price of £39 to £45 per user a month, with an AI assistant that acts when you ask it to. Mucka suits UK heating, plumbing and HVAC firms that want the AI to spot problems and prepare the fix without being asked, with gas, oil and F-Gas certificates, WhatsApp, an AI phone receptionist and a free plan: £29 for a solo owner or £39 per user, ex VAT, with subcontractors free.
Fergus is built around job costing. Its financial dashboard shows live cost against quote and where your margin is going, and that’s where it’s strongest. But it’s £39 to £45 per user, its AI assistant only acts when you ask it to, there’s no WhatsApp, and it’s built in New Zealand rather than for the UK.
I act on the numbers as well as reporting them. When a quote goes overdue or a job starts slipping, I draft the message in your voice and put it in front of you to send, where Fergus waits for you to ask. I start free, I’m £29 solo and £39 a head with subbies free, and I’m UK-built for MTD, CIS and VAT reverse charge.
Mucka vs Fergus, line by line
| Feature | MuckaFree / £29 solo / £39 team | FergusFrom £39 per user |
|---|---|---|
| Proactive AI that runs the daySpots problems, prepares actions, chases quotes, briefs you each morning | Assistive AI, acts when asked | |
| Talk to it: in-app voice + phone agent | Voice in its app, no phone agent | |
| Works inside WhatsApp | ||
| Free plan | ||
| Simple pricingSubbies are free | Free / £29 / £39 | £39 to £45 per user |
| Quotes and invoices | Incl. e-sign live quotes | |
| Job scheduling | ||
| Per-job costing and profit trackingFergus’s signature strength | ||
| Xero, QuickBooks, Sage and FreeAgent | Xero, QuickBooks and MYOB | |
| Gas Safety CertificatesCP12 and more, straight from the job | Certificate templates | |
| Calendar sync (Google, Microsoft) | Google Calendar | |
| Reviews with AI-drafted replies | ||
| Live engineer tracking and running-late alerts | GPS staff map on Professional | |
| Native app with lock-screen Live Activities | App, no Live Activities | |
| UK-built for MTD, CIS and VAT reverse charge | ||
| Easy to get goingNo heavy setup | Steeper learning curve | |
| Timesheets and purchase orders | ||
| | ||
Prices exclude VAT. My prices: free forever, £29/mo solo, £39 per user for teams, and your subbies are always free. Fergus’s prices and features last checked against their own site in October 2026.
Three reasons they make the switch
I chase what the numbers show
Fergus is great at telling you where the margin went. I spot the quote nobody chased and the job that’s about to slip, and hand you the fix to approve.
You can talk to me
Fergus’s assistant takes voice inside its own app. I take a phone call or a WhatsApp reply from the van as well, so your crew doesn’t have to open an app to keep me updated.
Built here, priced fairly
I’m UK-built for MTD, CIS and VAT reverse charge, I start free, and subbies don’t count towards the bill. Fergus is New Zealand software at £39 a head and up.
Be honest with yourself
Choose Fergus if…
- Deep per-job costing and live margin tracking is your number-one need
- You want detailed profitability reporting across every job
- You’re happy to pay per user and put the time into setup
Come to me if…
- You want me chasing quotes and flagging slipping jobs, on top of the costing
- You’d rather talk to me or reply on WhatsApp than sit and type
- You want UK-built software for MTD, CIS and VAT reverse charge
- You want a free plan and free subbie seats
Mucka vs Fergus: what firms ask
How much does Fergus cost in the UK?
Fergus's standard UK prices are £39 per user a month on Essentials and £45 on Professional, with a 14-day trial and no free plan. In October 2026 it was running a 90% off offer until December. Mucka is free to start, then £29 for a solo owner or £39 per user, ex VAT.
Does Fergus work with Sage or FreeAgent?
No. Fergus connects to Xero, QuickBooks and MYOB. Mucka syncs with Xero, QuickBooks, Sage and FreeAgent on every paid plan.
Does Fergus have AI?
Yes. Fergus AI and its assistants answer questions about jobs and numbers and draft messages, quotes and invoices when you ask, with every action confirmed by you. Mucka's engine does not wait to be asked: it flags what is slipping and prepares the fix for one-tap approval.
What are the alternatives to Fergus in the UK?
For UK heating and plumbing firms, the main Fergus alternatives are Mucka, Tradify, Powered Now, ServiceM8 and Gas Engineer Software. Tradify is closest for team tools like timesheets, purchase orders and job costing. Mucka suits firms that want UK gas, oil and F-Gas certificates, Sage or FreeAgent sync and an AI that flags problems without being asked, from free or £29 a month for a solo owner.
Weighing up more than two? Tradify, Fergus and more compared for heating and plumbing firms
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