Eight of the island's 60 IT & technology firms offer advisory and project work rather than hands-on operations — two Microsoft-platform shops, three AI-led practices (Sofsync, Islands AI, Concise), two bespoke-software houses, and Calligo on the data-privacy side. C5 Alliance holds five of Microsoft's six Solutions Partner designations. —
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Castel·Est. 1998
✦Oldest in this niche
Esri Gold Partner providing mapping and software solutions, including GIS, bespoke software development, data supply, and data capture, from Castel.
St Saviour
Consultancy that helps organisations design, build and improve software, AI and digital solutions, offering practical AI strategy and implementation in St Saviour.
St Peter Port·Professional services·Est. 2006
Software development firm formed in 2006, offering IT project management, business process change, and training for financial and commercial sectors.
St Peter Port
Computer consultant that has been ISO certified since 2018 and will provide IT support for States of Guernsey staff from 1st August 2025.
St Peter Port
Business management consultant combining data science, privacy, security and engineering with machine learning and cloud platforms.
St Sampson
IT consultant offering services in reporting, automation of routine work, AI assistants, and AI agents.
Vale
Cyber Essentials certified, providing managed IT services, cyber security, Microsoft Cloud, procurement and strategic consultancy in Vale.
St Peter Port
Firm that designs, builds, and operates AI systems for organisations, providing automation, voice, and compliance AI for GFSC-regulated Guernsey firms.