› 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 produce end-to-end IT integration, support, and consulting solutions
Empowering ambitious businesses with high-fidelity cyber security, seamless hybrid-cloud integration and ironclad, London-based technical support infrastructures.
powered by best-in-class technology
› what we do
One London partner for managed IT, cyber security & cloud
From day-to-day helpdesk and Microsoft 365 to 24/7 cyber security, resilient networks and business-grade connectivity — CLI Secure keeps every layer of your technology running, secured and accountable to a single London-based team.
CLI 360 — your whole IT estate on one pane of glass
Support, security, cloud and automation converge in a single managed platform. Real-time visibility for you, proactive action for us — no more logging into ten different tools.
- Live asset & security dashboard
- Automated patching & compliance
- Unified device & cloud inventory
- vCIO roadmap & quarterly reviews
99.98%
1,204
98%
3
4min
average response time
99.98%
uptime across managed clients
24/7
London-based helpdesk
5000+
endpoints under management
› how it works
Onboarding without the drama
A proven four-step path from first audit to a fully managed, continuously optimised IT estate.
Discover
We audit your estate — devices, licences, security posture and the gaps nobody told you about.
Onboard
Zero-downtime transition. We document everything and deploy monitoring across your fleet.
Manage
Proactive patching, 24/7 monitoring and a helpdesk your team will actually enjoy calling.
Optimise
Quarterly reviews with a dedicated vCIO to keep IT aligned with where the business is heading.
Why teams switch to CLI Secure
Actually responsive
A 4-minute average response and a helpdesk that picks up the phone.
Security by default
EDR, MDR and 24/7 SOC baked in — not sold as an afterthought.
Aligned to growth
A dedicated vCIO who plans IT around your business, not the other way round.
One accountable partner
From cabling to cloud, no more finger-pointing between vendors.
4.9 / 5 · trusted by London businesses
For over three years, CLI Secure has provided international support for our FortiGate network security across our London, Frankfurt and Luxembourg offices. The maintenance runs flawlessly, and having one trusted partner covering every site gives us real peace of mind
Meric Kayan
Esas Holding
They renewed our entire network, wireless and phone infrastructure end to end, and set us up with fully redundant internet so we're never offline. Their support is remarkably fast too — issues are resolved almost the moment we raise them.
Ilhan Keles
The Petersham Hotel
CLI Secure built our data centre from the ground up and has looked after it ever since. In over two years we've had zero unplanned downtime — their team catches issues long before they ever reach us.
Burkay Yapicioglu
FastPanda
› who we help
Trusted across regulated industries
From law firms and FCA-regulated finance to healthcare, education and retail, CLI Secure delivers compliant managed IT, cyber security and connectivity that stands up to audits, insurers and the demands of a growing London business.
Legal
Secure, compliant IT for law firms and chambers.
Finance
Resilient infrastructure for FCA-regulated firms.
Healthcare
Data-protected systems for clinics and practices.
Retail & Hospitality
Connected stores, tills and Wi-Fi that scale.
Education
Safe, managed IT for schools and colleges.
Professional Services
Reliable IT for agencies and consultancies.
› insights
From the CLI Secure blog
› common questions
Managed IT & cyber security, answered
Everything a London business asks before switching IT partner. Still unsure? Talk to a real engineer →
Our managed IT service covers your entire estate — a 24/7 London-based helpdesk, proactive monitoring and patching, Microsoft 365 and cloud management, backup and disaster recovery, cyber security, network and connectivity, plus a dedicated vCIO for strategy. One accountable team, one predictable monthly fee.
We answer with a 4-minute average response time and resolve the majority of issues remotely the same day. Managed clients get 24/7 cover, so critical incidents are handled at any hour by real UK engineers — never an offshore script.
Yes. Security is built in, not bolted on. Every managed plan includes endpoint protection (EDR), email and identity security, and 24/7 monitoring from a real UK Security Operations Centre, aligned to Cyber Essentials and ISO 27001.
Absolutely. Our onboarding is designed for zero downtime — we audit your estate, document everything, deploy monitoring and migrate services out of hours, so your team keeps working throughout the transition.
No. We earn your business every month with responsive support and clear reporting. Flexible terms mean you stay because the service is genuinely good, not because a contract traps you.
› let's talk
Ready to hand off the IT headaches?
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 →