Your tools don't talk. Your leads go cold. We fix both.
The Sentinel Systems is a UK automation and integration agency for service businesses in the UK, US and Canada. We connect the tools you already use - CRM, calendar, accounting, job software - so leads get answered and busywork disappears. Then we watch it all, 24/7.
Tools we work with: HubSpot, GoHighLevel, Zoho, Pipedrive, Jobber, JobNimbus, Stripe, Airtable, n8n, Zapier, Make, Google Workspace, Slack, QuickBooks, Xero, Twilio, Supabase, OpenAI, Claude
01 / Leads go cold
Leads go cold.
Enquiries from ads, forms, calls and DMs sit unanswered. By the time you reply, they've booked someone else.
02 / Busywork eats the week
Busywork eats the week.
Your team re-types data, chases follow-ups and builds reports by hand. Every week. Forever.
03 / Tools don't connect
Tools don't connect.
CRM, calendar, accounting, email, spreadsheets and job software all live in their own little silos.
04 / Automations break silently
Automations break silently.
Something stops working on a Tuesday. Nobody notices until a customer complains on Friday.
02 - Who we help
Service businesses whose tools don't talk.
HVAC, plumbing, roofing and electrical firms. Clinics. Estate agents. Coaches and consultants. Agencies. And anyone else drowning in repetitive admin - copying data between apps, slow replies, missed calls, forgotten follow-ups.
03 - What we do
Four steps. One team.
You own everything at the end.
01 - Audit
Audit
We map how leads, jobs and data move through your business today - and where time and money leak out.
02 - Build
Build
We automate and connect the tools you already use, or set up a better system where it's needed. No forced platform switch. No lock-in. You own everything.
03 - Launch & train
Launch & train
Tested, documented, and handed over with a short video walkthrough for your team.
04 - Monitor & improve
Monitor & improve
Sentinel watches your automations, fixes problems before they hurt, and we keep adding improvements every month.
04 - Services
Never miss a lead again.
- 01 -
Free Automation Audit
30 minutes. A short plan with your 3 highest-value automations.
Free - 02 -
Never Miss a Lead
Our flagship system for service businesses. Live in about 7–14 days.
From - 03 -
Custom automation & integration
Connect any systems. Kill the copy-paste.
From - 04 -
AI assistants
Chat agents that answer, qualify and book - around the clock.
Fromsetup - 05 -
Data cleanup & migration
Clean, merge and move your data without losing history.
From - 06 -
Custom apps & dashboards
Client portals, internal tools and live reporting.
From
05 - Proof
- Projects delivered
- 138.
- Projects delivered
- Build hours
- 1,300+.
- Build hours
- Businesses & agencies served
- 75.
- Businesses & agencies served
- Countries: UK, USA, Canada
- 3.
- Countries: UK, USA, Canada
06 - Sentinel
We watch it, so you don't have to.
Sentinel monitors every automation we build, fixes problems before they hurt and keeps improving things each month.
07 - Selected work
Things we've built.
What we hear before we start
- We lose leads every weekend.
- Our CRM and job software don't talk.
- Someone spends Friday copying data into spreadsheets.
- We only find out it's broken when a customer complains.
- Missed calls just… disappear.
08 - Why us
No fluff. Real systems.
- 01 -
Real systems, not just Zaps
APIs, scripts, custom apps and data pipelines - whatever the job actually needs.
- 02 -
Tool-agnostic
We pick what fits your business, not what pays us a commission.
- 03 -
You own it
Every account, line of code and document belongs to you.
- 04 -
Clear and straightforward
Fixed quotes before work starts. Plain-English updates. A UK company with US and Canada time-zone cover.
- 05 -
Two hands-on partners
You talk to the people who actually build it. No account managers in the middle.
Ready to stop doing it by hand?
A free 30-minute audit. We review your tools and send a short plan with your three biggest wins.