IT advisory & assurance

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.

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

Guernsey accountancy firm offering accounting, tax, payroll, and business advisory services to businesses of all sizes.

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

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.