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IT support and IT services in London: providers you can check

As at 14/11/2026, 6 IT providers in London hold the Assurix Trustmark: Astec IT, Conosco, Labyrinth Technology, Little Big Tech, Sereno IT Support Ltd and TET Ltd.

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Assurix Trusted MSP
6
On the Journey
9
Committed
3
Not yet verified
339

Status as at 14/11/2026.

Each meets all 59 controls across security and service. A failure left unfixed for 30 days suspends the Trustmark publicly.

357 listed: 6 Assurix Trusted MSPs, 9 On the Journey, 3 Committed and 339 Not yet verified.

Compare IT providers in London

Before you compare quotes, ask each Assurix Trusted MSP for its Trust Portal link. It shows what Assurix checks and today’s result.

ProviderStatusSectors it listsCertificates it listsFoundedStaffWhat to ask
Astec ITAssurix Trusted MSPHospitality, Public Sector, Retail & E-commerce and 7 moreISO 27001, ISO 90012018, 8 years19Its Trust Portal link
ConoscoAssurix Trusted MSPEducation, Hospitality, Public Sector and 9 moreCyber Essentials Plus, ISO 9001, ISO 14001, ISO 270012002, 24 years28Its Trust Portal link
Labyrinth TechnologyAssurix Trusted MSPLegal, Financial Services, Professional ServicesISO 9001, ISO 27001, Cyber Essentials2001, 25 years16Its Trust Portal link
Little Big TechAssurix Trusted MSPHospitality, Retail & E-commerce, Manufacturing and 6 moreCyber Essentials2021, 5 years10Its Trust Portal link
Sereno IT Support LtdAssurix Trusted MSPEducation, Manufacturing, Non-profit and 3 moreCyber Essentials, Cyber Essentials Plus, GDPR Certified2022, 4 years21Its Trust Portal link
TET LtdAssurix Trusted MSPEducation, Hospitality, Public Sector and 9 moreCyber Essentials, Cyber Essentials Plus, ISO 9001, ISO 14001, ISO 27001, GDPR Certified1985, 41 years100Its Trust Portal link
BTM IT Solutions LtdOn the JourneyManufacturing, Non-profit, Technology and 4 moreCyber Essentials2023, 3 years4What’s left, and when it expects to finish
Gorilla Technology LimitedOn the JourneyPublic Sector, Manufacturing, Non-profit and 5 moreNot listed2001, 25 years15What’s left, and when it expects to finish
IntegrityOn the JourneyRetail & E-commerce, Non-profit, Technology and 4 moreCyber Essentials2012, 14 years4What’s left, and when it expects to finish
NexGen Cyber LimitedOn the JourneyNon-profit, Construction, Healthcare and 2 moreCyber Essentials, Cyber Essentials Plus, ISO 9001, ISO 270012000, 26 years6What’s left, and when it expects to finish
Nutbourne LtdOn the JourneyPublic Sector, Manufacturing, Non-profit and 4 moreCyber Essentials, Cyber Essentials Plus2011, 15 years34What’s left, and when it expects to finish
PDR IT Solutions LtdOn the JourneyTechnology, Construction, Healthcare and 3 moreCyber Essentials, Cyber Essentials Plus2015, 11 years3What’s left, and when it expects to finish
Pensar ITOn the JourneyHospitality, Retail & E-commerce, Manufacturing and 7 moreCyber Essentials, Cyber Essentials Plus1996, 30 years10What’s left, and when it expects to finish
Platform365 LtdOn the JourneyEducation, Hospitality, Public Sector and 7 moreCyber Essentials, ISO 270012005, 21 years20What’s left, and when it expects to finish
Support TreeOn the JourneyRetail & E-commerce, Healthcare, Financial Services and 1 moreCyber Essentials, Cyber Essentials Plus2002, 24 years1What’s left, and when it expects to finish

Status and what to ask come from Assurix. Everything else is what each provider lists on its profile, and Assurix hasn’t checked it.

How this list is made

Listings come from the Assurix Trustmark Directory, as at 14/11/2026. Assurix sets each provider’s status. Towns, sectors, certificates, founding year and staff numbers are what the provider lists. Providers working with Assurix pay a subscription. None of them can change a result, and an Assurix assessor signs off every Trustmark.

Grouped by status, in alphabetical order within each, so every Assurix Trusted MSP is shown equally. Reviews and payments play no part in the order. Assurix Trusted and On the Journey providers are Assurix customers whose status Assurix checks, which is why they come first. Committed providers have signed up with a start date booked.

Assurix Trusted MSP
Independently assessed by Assurix on 59 controls across security and service. It passes all of them, with live evidence from its own tools. A failure left unfixed for 30 days suspends the Trustmark publicly.
On the Journey
This provider is on the journey to becoming an Assurix Trusted MSP. It has connected its tools, and Assurix is collecting evidence against the 59 controls. It doesn’t hold the Trustmark yet.
Committed
Signed up to work towards the Assurix Trustmark, with a start date booked. It doesn’t hold the Trustmark yet.
Not yet verified
Listed, but Assurix hasn’t assessed it. Ask what evidence it can show you.

The 59 controls are 40 security controls aligned to NCSC CAF 4.0 and 19 operational controls built for MSPs.

Before you sign with any provider, read the NCSC’s guidance on choosing a managed service provider, and check a Cyber Essentials certificate on the IASME certificate search.

How the Directory works

Assurix Trusted MSPs 6

On the Journey 9

Committed 3

339 providers Not yet verified

Choosing an IT provider in London

Check, so you don’t switch again in a year.

Nobody has more access to your business than your IT provider, so check its security before you sign.

9 are on the journey to becoming an Assurix Trusted MSP: BTM IT Solutions Ltd, Gorilla Technology Limited, Integrity, NexGen Cyber Limited, Nutbourne Ltd, PDR IT Solutions Ltd and 3 more. 3 are Committed: HTL Support, Tech Ahoy! and Teknite.

Cyber Essentials appears on 154 listings here, ISO 27001 on 99. These are the providers’ own claims. A certificate shows a check passed on one date, so ask to see current evidence.

Providers here most often list Financial Services, Professional Services and Healthcare as sectors they serve. Ask any shortlist for a reference from a business like yours.

How to check an IT provider before you sign

London in numbers

IT providers listed
357
Working with Assurix
6 Trusted, 9 On the Journey and 3 Committed
Listing Cyber Essentials
154 of 357 (43%), 79 of them Plus
Listing ISO 27001
99 of 357 (28%)
Sectors listed most
Financial Services (120), Professional Services (72), Healthcare (62)
Services listed most, after IT support
Cloud & Microsoft 365 (290), Cyber Security (285), IT Consultancy & Strategy (227)
Typical time trading
15 years (median)

Counts from the Directory as at 14/11/2026. Certificates and sectors are what each provider lists.

Questions about IT providers in London

Which IT providers in London are independently assessed by Assurix?

Astec IT, Conosco, Labyrinth Technology, Little Big Tech, Sereno IT Support Ltd and TET Ltd hold the Assurix Trustmark. Each one meets all 59 controls, with live evidence from its own tools, and an Assurix assessor signs it off.

How many IT providers are listed in London?

357 as at 14/11/2026: 6 Assurix Trusted MSPs, 9 On the Journey, 3 Committed and 339 Not yet verified.

Are the other providers in London checked?

Not yet verified means the provider is listed, but Assurix hasn’t assessed it. It doesn’t mean they do a poor job. 339 of the 357 here are Not yet verified. Ask what evidence they can show you.

Which sectors do IT providers in London serve?

The sectors listed most are Financial Services (120), Professional Services (72) and Healthcare (62). The sector filter in the Directory search narrows the list.

How should I compare providers?

Check each provider’s status in the Trustmark Directory. An Assurix Trusted MSP can send you its Trust Portal, which shows what is checked and today’s result. Ask anyone else what evidence they can show you today.

Will an Assurix Trusted MSP cost more?

Prices vary. Ask each provider what evidence it can show you, then compare quotes against the same standard.

Want help choosing?

Tell us what you need. We’ll suggest providers working with Assurix that fit, Assurix Trusted MSPs first, and introduce you. Free, and no obligation.

Towns and counties in London

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