Tenacity keeps small and growing businesses running across Sheffield, Leeds, Manchester, Nottingham and Derby, with one team that actually answers the phone.
One partner instead of five separate suppliers.
Everything under one roof, from one local team. Take what you need now, and add the rest as you grow.

Fast, friendly IT support from a local team, plus proactive monitoring so less goes wrong in the first place.
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Modern cloud phone systems, and AI that answers, routes and handles calls so your team can focus on customers.
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Business-grade broadband and leased lines we supply, install and support, with one number to call when it matters.
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Always on protection for your business, watched over by real people. From EDR and MDR to identity, MFA and disaster recovery, we keep the threats out and keep you running.
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Microsoft 365, cloud backup and migrations done right, so your business works securely from anywhere.
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More than picking tools. We help you build an AI strategy, then design, deploy and run the workflows that genuinely save your team time and money.
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Off the shelf software not quite fitting? Our in house development team builds the custom apps, dashboards and automations that make your business run better.
Learn more →Two decades of keeping businesses running, with real people on real tickets and response times measured in minutes, not days.
People worry about changing IT provider about as much as changing banks. Honestly, it is usually a lot simpler, and most businesses are switched over in under a day.
Don’t take our word for it, here’s what clients who’ve worked with us for years have to say.
We have trusted the IT systems of several of our businesses to Liam McNaughton and his brilliant team at Tenacity IT Ltd for over 20 years. During this time Liam has specified and installed several cost effective new server-based, multi-user IT and VOIP telephony systems, as well as maintaining and upgrading systems along the way. Tenacity IT’s technical ability, professionalism and speed of response has always been excellent and we remain a very happy client!
The service and support has been excellent down the years whether it be daily support or project work to improve the system. We trust Tenacity. You can too.
You don’t want an IT department. You want IT that just works, and someone to call when it doesn’t.
Based in Sheffield, on the road across the North. When you need hands-on help, we come to you.
No jargon, no condescension. We explain what’s going on in a way that actually makes sense.
We monitor and maintain your systems so problems get fixed before you even notice them.
IT, phones, internet, security and cloud under one roof. One team, one number, one invoice.
The questions we hear most from owners and managers across the region, answered honestly.
Yes. Real people, based locally, who pick up the phone and already know your setup, no call-centre scripts or ticket black holes.
Absolutely. We’re on-site across Sheffield, Rotherham, Leeds, Manchester, Nottingham and Derby whenever hands-on help is the right call.
Not at all. Small and mid-sized businesses are exactly who we’re built for. You get enterprise-grade IT, sized and priced for your team.
IT support, phones, internet, security and cloud, one partner instead of five suppliers blaming each other when something goes wrong.
Plain-English advice on the questions we get asked most, from IT support costs to the 2027 phone switch-off.

On SysAdmin Day we explain the unseen work that keeps your systems reliable, from backups and patching to firewalls, and thank the team who do it every day.
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Almost every Sheffield business can now get FTTP full fibre. We explain your options, from enhanced FTTP to CityFibre leased lines, and how to check coverage.
Read more →Per-user, per-device or fixed fee? Here is what managed IT support really costs a UK small business, and how to compare quotes fairly.
Read more →Headquartered in Sheffield and supporting businesses right across the North and Midlands.
Pick up the phone and talk to a local engineer, no forms, no hold-music marathons.