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Delivering technology solutions that drive productivity and boost profitability
At C5 Alliance, we help businesses across the Channel Islands manage IT services with confidence.
Our managed service offering is built on reliability, security, and flexibility — so you can focus on delivering value to your clients while we take care of the infrastructure behind it.
Whether you’re migrating to the cloud, strengthening cybersecurity, or improving uptime, our IT Services team delivers SLA-backed support and 24x7x365 performance monitoring to keep your organisation running smoothly.
Our Locations

Guernsey
No. 1 The Plaza, Elizabeth Avenue, St. Peter Port, Guernsey, GY1 2HU

Jersey
Windward House, La Route de la Liberation, St Helier, Jersey, JE1 1BG