IT Support & IT Services in the South East

In South East, 4 of 888 IT providers carry the Assurix Trustmark, meaning they have been independently assessed against the NCSC Cyber Assessment Framework. Each verified provider commits to continuous re-assessment, so their security posture stays current between audits — not just at renewal time.

What to look for in a South East provider

The region is large and mixed, so the address on a provider's website tells you less than where their engineers actually cover. Pin that down.

Where their engineers are based

A provider listed in the South East might sit an hour or more from you. Ask which towns their onsite engineers cover routinely, not just the areas they'll travel to for a big enough job.

Comfort with London commuter teams

Many South East firms have staff who split time between home and a London office. Check the provider is set up for hybrid working and can support people wherever they log in.

Onsite response across the county

Coastal Kent and Sussex can be a long drive from the commuter belt. Get a clear onsite response time for your specific location, in writing, rather than a regional average.

Out-of-hours cover

Ask who answers outside office hours and whether it's included. In a region with a lot of small and mid-sized firms, out-of-hours arrangements vary widely.

How they run multi-site and hardware

If you have more than one site, or you're planning a move, ask how the provider handles kit delivery, installs and secure disposal between locations, and whether travel to each site is part of the deal.

Questions to put to a South East provider

Use these to turn a broad 'we cover the South East' into something concrete for your business.

1. Where are your engineers physically based, and how far are they from us? A provider's head office and its nearest engineer can be two very different distances.
2. What onsite response time can you commit to for our exact location? Regional averages hide how long the coast can take from the commuter belt.
3. How do you support staff who work between home and a London office? Hybrid cover is common here and easy to get wrong.
4. Do you charge travel or call-out fees for onsite visits? Across a large region these can add up quietly.
5. How do you show our security is holding up over time? Continuous evidence beats a certificate that's a year old.
6. If we open or move a site, what's your process? A clear answer signals they've handled growth before.

IT providers in South East

888 managed service providers are listed in South East.

Showing 50 of 888 providers. View all 888 providers.

Towns served in South East

IT support providers in South East are based across the following towns. Towns with five or more listed providers link to their own directory page.

• London (319 providers)
• Surrey (64 providers)
• Kent (58 providers)
• Hampshire (46 providers)
• West Sussex (25 providers)
• Middlesex (25 providers)
• Berkshire (22 providers)
• Buckinghamshire (18 providers)
• East Sussex (16 providers)
• Hertfordshire (16 providers)
• Essex (15 providers)
• Oxfordshire (14 providers)
• Milton Keynes (10 providers)
• Reading (9 providers)
• Greater London (7 providers)
• Southampton (6 providers)
• Hemel Hempstead (6 providers)
• Brighton (5 providers)
• Woking (5 providers)
• Shoreham-By-Sea (5 providers)
• Witney (4 providers)
• Chesham (4 providers)
• Horsham (4 providers)
• Bedfordshire (4 providers)
• Bedford (4 providers)
• Slough (4 providers)
• Basingstoke (4 providers)
• Oxford (3 providers)
• Wembley (3 providers)
• Harrow (3 providers)
• Stanmore (3 providers)
• Aylesbury (3 providers)
• Redhill (3 providers)
• Watford (3 providers)
• Leatherhead (3 providers)
• Croydon (3 providers)
• Crawley (3 providers)
• Hornchurch (3 providers)
• Abingdon (3 providers)
• Ilford (3 providers)
• Farnham (3 providers)
• Romsey (3 providers)
• Havant (2 providers)
• Borehamwood (2 providers)
• Dartford (2 providers)
• Bucks (2 providers)
• Beckenham (2 providers)
• Edgware (2 providers)
• Bracknell (2 providers)
• Hounslow (2 providers)
• Waterlooville (2 providers)
• Hove (2 providers)
• Wantage (2 providers)
• Fareham (2 providers)
• Bicester (2 providers)
• Wokingham (2 providers)
• Maidstone (2 providers)
• Romford (2 providers)
• Twickenham (2 providers)
• Orpington (2 providers)
• Barnet (2 providers)
• Fleet (2 providers)
• Weybridge (2 providers)
• Feltham (2 providers)
• Herne Bay (2 providers)
• Isleworth (2 providers)
• Folkestone (2 providers)
• Waltham Abbey (2 providers)
• Brentford (2 providers)
• Hailsham (2 providers)
• Carshalton (2 providers)
• England (2 providers)
• Southwick (1 provider)
• Newbury (1 provider)
• Whiteley (1 provider)
• Bromley (1 provider)
• Southall (1 provider)
• Isle Of Wight (1 provider)
• Barking (1 provider)
• Sutton (1 provider)
• Surbiton (1 provider)
• Windsor (1 provider)
• Littlehampton (1 provider)
• East Cowes (1 provider)
• Hants (1 provider)
• Hampshiirre (1 provider)
• Godalming (1 provider)
• Arundel (1 provider)
• High Wycombe (1 provider)
• Sevenoaks (1 provider)
• Arborfield (1 provider)
• Guildford (1 provider)
• Kidlington (1 provider)
• Haywards Heath (1 provider)
• Waltham Cross (1 provider)
• Hook (1 provider)
• Pinner (1 provider)
• Herts (1 provider)
• Bexleyheath (1 provider)
• Woodford Green (1 provider)
• Coulsdon (1 provider)
• Middesex (1 provider)
• Berkhamsted (1 provider)
• Maidenhead (1 provider)
• Chessington (1 provider)
• Medway (1 provider)
• Portsmouth (1 provider)
• Sheerness (1 provider)
• Aldershot (1 provider)
• Mitcham (1 provider)
• Ashford (1 provider)
• Sunbury-On-Thames (1 provider)
• Berks (1 provider)
• Morden (1 provider)
• Potters Bar (1 provider)
• Wallingford (1 provider)
• Kingston Upon Thames (1 provider)
• Nazeing (1 provider)
• Eastbourne (1 provider)
• Chertsey (1 provider)
• Uxbridge (1 provider)
• Erith (1 provider)
• Gravesend (1 provider)
• Enfield (1 provider)
• Birchington (1 provider)
• Worcester Park (1 provider)
• Ruislip (1 provider)
• Cobham (1 provider)
• Bushey (1 provider)
• Ken (1 provider)
• Stokenchurch (1 provider)
• Worthing (1 provider)
• Chorleywood (1 provider)
• Biggin Hill (1 provider)
• Uk (1 provider)
• Southgate (1 provider)

Browse nearby regions

• London IT providers
• East of England IT providers
• East Midlands IT providers
• South West IT providers

Does a local provider matter across the South East?

For the everyday running of your systems, barely. Helpdesk calls, updates, monitoring and security work are handled remotely, so a provider two counties away can look after you as well as one in your town. The place local becomes real is the physical visit: a dead machine, a new office fit-out, or a planned meeting with your team.

What makes the South East different is size. It's the largest region here, stretching from the London fringe out to the Kent and Sussex coast. A provider's website might say South East while their engineers sit an hour from you, so the useful question is where their people actually are.

Many providers in the region are used to clients who commute into London and teams split across home and city. If that's how your business runs, look for a provider who treats hybrid working as normal rather than an exception.

What the Assurix badge means in this region

Assurix is an independent UK trustmark that works on proof rather than promises. A Trusted MSP has passed all 64 of its controls, which are aligned to the NCSC Cyber Assessment Framework, and stays there through continuous monitoring plus an annual reassessment. Providers here that hold the Trusted MSP badge are shown first, and any working toward it are listed as On the Journey within a six-month window. Every other provider here is listed as not yet Assurix-verified, which is a neutral status.

Frequently asked questions

The South East is huge. Does that affect who I should pick?

It does. Because the region runs from Surrey and Berkshire out to the Kent and Sussex coast, two providers can both call themselves South East and be an hour apart. For remote support that gap doesn't matter. For anything onsite it does. Decide how often you'll need someone physically present, then judge distance accordingly. If in-person visits are rare, cast the net wide and focus on evidence and experience instead.

How do I tell how close a provider really is to me?

Don't rely on the address on their homepage. A provider's registered office and its nearest onsite engineer are often different places. Ask directly which towns their engineers cover on a normal week, and what onsite response time they'll commit to for your postcode. Get it in writing. A provider who's genuinely close will answer without hesitation, while one stretching to reach you will tend to talk in regional averages rather than specifics.

My team splits time between home and London. Does that change what I need?

It's worth flagging early. Hybrid teams split between a home county and a London office are common across the South East, and support needs to follow people wherever they log in. Ask whether the provider's agreement covers home workers as well as the office, how they help someone dialling in from home, and whether onsite visits are only for the registered site. Providers here tend to be used to this pattern, but confirm it rather than assume it.

What does 'On the Journey' mean next to a provider?

'On the Journey' means a provider is working toward the Assurix Trusted MSP badge but hasn't passed yet. It's time-limited to six months, so it signals active effort rather than a finished result. Treat it as a provider taking the process seriously, not as a pass. The full Trusted MSP badge is the one that confirms all 64 controls have been met and are being monitored continuously.

Are coastal areas harder to get support in than the commuter belt?

Not necessarily, because most support is delivered remotely and reaches the coast as easily as the commuter belt. The difference shows up with onsite work. An engineer heading to the Kent or Sussex coast from an inland base has further to travel, which can affect how fast someone reaches you in person. If you're on the coast, ask specifically about onsite response for your area and whether the provider has engineers nearer than their head office suggests.

Related pages

• MSPs and IT support in London
• MSPs and IT support in the South West
• MSPs and IT support in the East of England
• IT support for professional services
• IT support for financial services

What to ask an IT provider in South East

Use these questions when evaluating any IT support provider in South East, regardless of size or certification status.

1. How do you demonstrate that our systems stay protected between audits — not just at certification renewal? Verified IT support providers use continuous monitoring, not one-off assessments. Ask to see a live dashboard or a recent compliance report before signing.
2. Which cybersecurity certifications do you hold, such as Cyber Essentials Plus or ISO 27001, and are they current? Certifications expire. Always ask for the certificate date and the issuing body, and check whether the scope covers the services you are buying.
3. What is your guaranteed response time for a critical incident, and who is responsible out of hours? Response SLAs vary widely. Confirm whether the SLA covers resolution or acknowledgement only, and ask who you actually reach at 2 am on a Sunday.
4. How do you handle a security breach — who do you notify first, and what does your recovery process look like? UK GDPR requires breach notification within 72 hours. Your IT provider should have a documented incident response plan and be willing to share it.
5. Can you share references from clients in a similar sector or of a similar size? A provider experienced in your industry already understands your regulatory context, common threat patterns, and the compliance questions your clients ask.
6. What is included in your monthly fee, and what would be charged as an extra? Common add-on costs include out-of-hours callouts, additional users, hardware replacements, and advanced security tools. Get the full scope in writing before you commit.