› connectivity & telecoms
leased lines & wan
Leased LinesDedicated, uncontended fibreDedicated Internet AccessGuaranteed, SLA-backedFTTP & Full FibreUltrafast full fibreSD-WANIntelligent multi-site WANMulti-Site ConnectivityOne secure networkBackup ConnectivityAutomatic 4G/5G failovermobile
Business MobilesO2, Vodafone & EE airtimeSIM Only DealsFlexible 30-day & 24-monthMobile Broadband4G / 5G data-only SIMsStatic IP SIMsFixed IP for IoT & failovertelecoms
Cloud Hosted PBXVoIP phone system, powered by VoipingerSIP TrunkingConnect your PBX, cut call costsMicrosoft Teams PhoneCalling inside TeamsBusiness Phone NumbersLocal numbers in 145+ countriesCRM Integration250+ apps, click-to-dialAI Receptionist24/7 AI voice agentAI Contact CenterAI voice & chat at scale› cyber security
Wifinger
Our own guest Wi-Fi platform: a branded login page on the access points you already have, plus consent, analytics and marketing — designed, installed and managed by us.
Explore guest Wi-Fi› design · deploy · support
› surveillance & data infrastructure
We're an IT company offering budget-friendly enterprise solutions. Our portfolio enables organisations of every size to leverage the full power of technology to improve business performance.
› our story
CLI Secure began over 15 years ago with a simple belief: enterprise-grade IT shouldn't be reserved for enterprises. What started as a small London helpdesk — a handful of engineers answering calls and fixing problems the same day — has grown into a full-service IT, cyber security and telecoms partner trusted by businesses right across the UK.
Along the way we've weathered every shift the industry has thrown at us — the move to the cloud, the rise of remote and hybrid work, and an ever-changing threat landscape. Through all of it, one thing has never changed: we treat your technology as if it were our own, and we measure our success by how much easier we make your working day.
Today, with more than 15 years of hands-on experience and partnerships with the world's leading vendors, our team designs, builds and manages secure digital environments end-to-end — so innovation, collaboration and growth come naturally to the businesses we look after.
Onsite & remote IT support
Correctly set up, optimised & maintained infrastructure
Exceptional service, support and guidance throughout
500+
projects delivered
1,000+
happy customers
15+
years of experience
2 hrs
typical setup time
Associated companies & brands
› excellence team
Highly trained engineers and consultants dedicated to delivering the best possible service.
We support every aspect of your IT — from design and implementation to ongoing management.
Every business is different, so we tailor solutions to your exact requirements.
We identify and address potential issues before they become major problems.
Strategic partnerships with Fortinet, Cisco and Microsoft for the latest technology.
Committed to exceptional service so you always receive the highest care and attention.
› why clients choose us
Always available to answer queries and advise on how we can help.
A concise, plain-English IT policy that's easy for your whole team to understand.
End-to-end management so you can focus on what matters most — your business.
We review and evaluate your existing IT and recommend how to improve performance.
Reliable, secure and robust systems built around your organisation.
IT strategies designed and implemented around your specific needs.
We're with you every step of the way, adapting your strategy as you grow.
See pricing before you sign — never locked into hidden fees or terms.
› let's talk
Leave your details and a London-based engineer will call you back — usually within one business hour. No sales scripts, no obligation.
Or explore Managed IT →