· IT Support
PSTN switch-off checklist: what to check before 31 January 2027
Traditional phone lines go digital on 31 January 2027. A device-by-device checklist for businesses: alarms, lifts, card machines, door entry, fax and more.
Certified and accredited
See our trust centre
Managed IT and cyber security from one team.
We look after your systems day to day and keep them secure, for companies, schools and charities across the UK.
We're also an IASME Certification Body, so we certify Cyber Essentials and Cyber Essentials Plus ourselves.
Trusted by
Our services.
Support for the systems you run today, and advice on what comes next.
- 94%
- Resolved on first contact
- 5,000+
- Users looked after
- 99.9%
- Service uptime
- 20+
- People on the team
Who we work with.
We support organisations across the UK, from growing companies to multi-academy trusts.
Community impact.
Plug the Gap is our sister company, set up to get more people in Norfolk online. It takes laptops organisations no longer need, wipes and refurbishes them, and hands them to people referred by local charities.
120+laptops and devices handed over since 2022
From Plug the Gap's records, November 2026.
Insights.
Guidance from our team on Cyber Essentials, IT support and buying IT.
· Cyber Essentials
Cyber Essentials First Step Fund: how the 75% discount works
How the Cyber Essentials First Step Fund works: 75% off for eligible UK SMEs until 31 March 2027, from £80 + VAT, and how to apply through IASME.
· Cyber Essentials
How much does Cyber Essentials cost?
What sets the cost of Cyber Essentials and Cyber Essentials Plus, from IASME's size bands and your scope to the work to get ready, and how to get an accurate quote.
Why organisations choose Osiris.
Meet the teamSupport within the hour
Every support request is picked up within one business hour.
We certify you ourselves
As an IASME Certification Body, we certify Cyber Essentials and Cyber Essentials Plus directly.
A named consultant
Every client gets a named consultant who stays accountable.
A 24/7 incident line
If something goes wrong out of hours, a senior consultant is on it within the hour.
Talk to us about your IT.
Tell us what you need and we'll reply within one working day.