Cyber security

Aspida Management Services Limited offers compliance, risk management, and corporate governance services as part of the Aspida Group.

Guernsey AML and regulatory compliance consultancy, trading as Horsepool Group, offering outsourced compliance services and training.

The Channel Islands' largest IT services company, offering managed IT, cloud, cybersecurity, and connectivity services.

Channel Islands business solutions group offering IT, payroll, and managed services through subsidiaries Sigma IT, Sigma Pay, and Fultura.

Guernsey's main telecommunications provider, offering mobile, broadband, landline, and IT services under the Sure by Beyon brand.

Sure's B2B division, providing connectivity, cloud, and managed services across the Channel Islands and Isle of Man.

Guernsey cyber security firm offering penetration testing, digital forensics, and security advisory services.

GFSC-registered chartered accountancy and audit firm in St Sampson, part of Baker Tilly International.

Fultura Limited provides managed cyber-security, network monitoring, hosted desktops, and IT support across the Channel Islands and UK, as part of Sigma Group since 2023.

GFSC-licensed corporate services and company secretarial provider in St Peter Port, part of Horsepool Group.

Managed IT and cyber security services company, part of the Zenzero group, with offices in Guernsey, Jersey, and Dubai.

Guernsey managed IT services and cybersecurity company, established in 2024, serving Channel Islands businesses.

IT support and cybersecurity company established in 1990, serving businesses and home users across the Channel Islands.

Big Four professional services firm offering audit, tax, and advisory services across the Channel Islands.

IT professional in St Peter Port specialising in cybersecurity, Windows Server Administration, and Microsoft 365.

The Guernsey branch of EY, a Big Four professional services firm offering assurance, consulting, tax, and strategy and transactions services from St Peter Port.