The best IT support companies in London offer a contractual 15-min SLA, all-inclusive pricing (cyber security + on-site included), Microsoft Partner status, and monthly rolling contracts. Coreitech: 4.9★ · £25/user/month · London Bridge SE1. 0203 834 9728.
IT SUPPORT
COMPANIES
UK — COMPARED 2026
4.9★ · 97% retention · 15-min SLA · From £25/user/month · Microsoft Partner
Comparing the best IT support companies in the UK — what to look for when choosing IT support companies, provider comparison table, red flags to avoid, and why Coreitech is rated 4.9★ by 200+ SMEs across London and the UK.
Why London businesses switch
to a better IT support company
If your current IT support has started to feel reactive, fragmented, or a step behind your business, you're not alone. These are the most common reasons London SMEs switch to Coreitech — and what changes after they do.
Spending hours chasing updates on open tickets
A dedicated account manager who knows your systems means you get status updates without asking. Issues are tracked to resolution — not left hanging in your inbox.
Still dealing with recurring IT problems with no root-cause fix
We don't patch things up. Every issue is documented, root-caused, and followed up proactively so the same problems don't keep coming back month after month.
Tired of being passed from one technician to another, repeating yourself
You speak to engineers who know your setup. We keep detailed records and build relationships with your team — you never have to explain the same issue twice.
Paying for support but still doing all the IT work internally
If you're logging issues and chasing solutions yourself, something's wrong. Our all-inclusive support means we handle everything — you shouldn't be doing IT work you're paying us to do.
Rising IT costs with no visibility or predictability
No more surprise invoices. Transparent per-user pricing gives you a predictable monthly cost that includes everything — no hidden fees, no unexpected add-ons, no end-of-year true-ups.
Worried your technology isn't secure or compliant
From audits to staff training and Cyber Essentials certification, we get you ahead of threats and compliance risks. Confidence that your business is fully protected — not guesswork.
6 things to look for in the
best IT support companies in London
When evaluating IT support companies in London, these six criteria separate the best from the rest. Use this checklist to compare providers and avoid costly mistakes.
Guaranteed Response SLA
Ask for the exact SLA in writing — not "we aim for" but a contractual guarantee. Industry standard: 15 minutes for critical (P1), 2 hours for high (P2). Any reputable London IT company will commit this in contract.
Cyber Security Built In
Not as an add-on. The best IT support companies include EDR, email security, patch management, MFA, and dark web monitoring in the base price. If security is an upgrade, the base price is misleading.
Microsoft 365 Expertise
Over 90% of London SMEs use Microsoft 365. Your IT support company should fully manage Teams, SharePoint, Intune, Entra ID, and Defender — and hold a current Microsoft Partner accreditation.
On-Site Engineer Availability
Remote-first is fine — but on-site visits should be included, not charged per visit. Ask specifically about on-site callout fees. The best IT support companies include on-site in the monthly fee.
Transparent All-Inclusive Pricing
Per-user pricing with no hidden charges is the gold standard. Avoid providers with per-ticket limits, call-out fees, or cyber security as extras. Get the full all-in price in writing before signing.
Realistic Contract Terms
The best IT support companies offer monthly rolling contracts or 12-month terms with fair exit clauses. Avoid 3-year auto-renewing contracts with punitive termination fees.
How do IT support companies
in London compare?
Use this comparison of well-regarded IT support companies in London to evaluate your options. Data is based on publicly available pricing and accreditation information.
| IT Support Company | Location | Pricing | Critical SLA | MS Partner | Cyber Essentials | Rating | Best For |
|---|---|---|---|---|---|---|---|
| CoreitechTop Rated | London Bridge SE1 | From £25/user/mo (published) | 15 min (contractual) | ✓ | ✓ | 4.9★ Google | SMEs 5–200 users, transparent pricing |
| Totality Services | Vauxhall & City of London | Not published | Not published | ✓ | ✓ | 4.9★ Feefo (786 ratings) | Mid-market, Windows & Mac |
| Wavex Technology | Central London (since 1998) | Not published | Not published | ✓ | ✓ | 4.8★ (900+ comments) | Financial services, AI-augmented ops |
| Akita | London & South East | Claims up to 40% cheaper than in-house | Not published | ✓ | ✓ | 4.7★ Cloudtango | Cyber Essentials assessments |
| TechQuarters | Central London | Not published | Not published | ✓ | Unconfirmed | 4.6★ | Microsoft 365 migration focus |
| Fifosys | London & UK | Not published | Not published | ✓ | Unconfirmed | 4.5★ | Multi-site UK businesses |
Data sourced from company websites, Microsoft Partner directory, Google, Feefo, and Cloudtango as of July 2026. Pricing reflects publicly listed information only — "Not published" means the provider does not display pricing on their website.
How we evaluate
IT support companies in London
This comparison is based on six publicly verifiable criteria. We use the same framework when advising London businesses on how to choose an IT support company — and we hold ourselves to every one of these standards.
Contractual SLA
Is the response time guaranteed in the contract, or just "aimed for"? We only count providers with a written, contractual SLA — typically 15 minutes for P1 critical issues.
Pricing transparency
Is pricing published on the website? Providers that hide pricing until a sales call typically charge more. Coreitech publishes £25/user/month openly.
Microsoft Partner accreditation
Verified on Microsoft's partner directory — not just claimed on the website. Required for proper Microsoft 365, Intune, and Entra ID management.
Cyber Essentials certification
Does the provider hold Cyber Essentials themselves? A provider selling cyber security should be certified — not just selling it.
Verified client reviews
Google, Feefo, Trustpilot, or Clutch reviews — with a rating count, not just a score. We look for 50+ reviews from real businesses.
Contract flexibility
Monthly rolling or 12-month terms with fair exit clauses. Providers with 3-year auto-renewing contracts and punitive exit fees score lower.
8 red flags when choosing
an IT support company
Why London SMEs rate Coreitech
the best IT support company
All-inclusive pricing
for London SMEs
Real results from London
businesses we support
Don't just take our word for it. These are quantified outcomes from London SMEs that switched to Coreitech — the kind of results the best IT support companies should be able to evidence.
Challenge
Recurring email outages and slow helpdesk response from their previous provider were disrupting billable work.
Result
Zero email outages in 18 months after migration to managed Microsoft 365. Average helpdesk response dropped from 4 hours to 11 minutes. Cyber Essentials Plus certified first time.
Challenge
Previous IT company missed three critical security gaps identified during an FCA compliance review.
Result
All three gaps closed within 7 days of onboarding. ISO 27001 readiness achieved in 90 days. Zero compliance findings on subsequent FCA audit.
Challenge
Needed to onboard 30 new starters across two sites without IT disruption during a rapid growth phase.
Result
All 30 users onboarded via Windows Autopilot in 5 days with zero helpdesk tickets during setup. Zero downtime during office expansion.
What clients say about this
IT support company London
"Genuinely the best IT support company we've used in 15 years. Response times are exactly as promised, the team understand our business, and we've not had a major IT incident since switching."
"We compared five IT support companies in London on price, SLA, and Microsoft credentials. Coreitech won on all three. Two years in, it's clearly the right decision — they treat us as a partner, not a ticket."
"The thing that sets this IT support company apart is that they're proactive. Issues are fixed before I know about them. That's what the best IT companies do — and it's rare to actually find one that delivers it."
"We switched from a large national IT support company to Coreitech and the difference is night and day. Faster response, a named account manager who actually knows our setup, and lower cost. The best IT support decision we've made."
"As a growing SME we needed an IT support company that could scale with us. Coreitech onboarded 30 new starters across two sites without a single IT hiccup. That level of planning is why they're rated the best in London."
"Their cyber security work was the standout. The audit flagged three critical gaps our previous IT company missed, and Coreitech closed them within a week. We now pass Cyber Essentials Plus first time, every time."
What is business IT support in London?
Business IT support is the managed delivery of all day-to-day technology operations for a company — helpdesk, infrastructure, cyber security, Microsoft 365, and strategic IT planning — handled by a single specialist provider under a fixed monthly contract. For London businesses it replaces the cost and risk of an in-house IT team or unpredictable break-fix bills with predictable, proactive support.
Coreitech delivers business IT support in London to SMEs across all 32 boroughs — from the City and West End to Canary Wharf, Southwark, and Shoreditch. From £25/user/month, every client gets unlimited helpdesk, on-site engineers, 24/7 monitoring, Microsoft 365 management, and enterprise-grade cyber security in a single all-inclusive contract.
15-min SLA, in contract
Critical issues responded to in 15 minutes — guaranteed in your service agreement, not a best-effort promise.
All 32 London boroughs
On-site engineers from our London Bridge SE1 base reach Central London in 30–45 minutes, outer boroughs 45–60.
Named account manager
One point of contact who knows your business, your systems, and your team — not a rotating helpdesk queue.
Security included as standard
EDR, email security, MFA, patching, and dark web monitoring — not a charged extra like most London IT companies.
IT support companies London:
questions answered
Q.What is the best IT support company in London?
The best IT support company in London depends on your business size, sector, and requirements. For SMEs (5–200 users), the key criteria are: a contractual 15-minute critical SLA, all-inclusive pricing with no hidden charges (cyber security, on-site, patching all included), Microsoft Partner accreditation, UK-based engineers, and transparent monthly rolling or annual contracts. Coreitech meets all five criteria from £25/user/month and holds a 4.9★ Google rating from 87+ verified reviews.
Q.How do I choose the right IT support company in London?
The five factors to evaluate when choosing an IT support company in London: (1) Response SLA — get the guaranteed times in writing, not aspirational targets; (2) What's included — cyber security, on-site visits, and Microsoft 365 management should all be in the base price; (3) Contract terms — avoid 3-year auto-renewing agreements; (4) Proof — check Google reviews, Trustpilot, and Clutch specifically for your company size and sector; (5) Microsoft accreditation — verify it on Microsoft's partner directory, not just their website.
Q.What are the top IT support companies in London?
Well-regarded London IT support companies for SMEs include Coreitech (London Bridge SE1 — from £25/user/month, 4.9★ Google), Totality Services (Vauxhall — 4.9★ Feefo, 786+ ratings), Wavex Technology (Central London — Microsoft Partner, since 1998, ISO 27001 aligned), Akita (London & South East — Cyber Essentials assessors, Microsoft Partner), TechQuarters (Central London — Microsoft 365 focus), and Fifosys (London & UK — multi-site). Each has different strengths: Coreitech is strongest on transparent per-user pricing, contractual SLAs, and SME contract flexibility. Evaluate each against your specific business size, sector, and SLA requirements.
Q.How much should IT support cost for a London SME?
Managed IT support for London SMEs typically costs £25–£60/user/month for a comprehensive package. Be wary of prices below £20/user — these almost always exclude cyber security, on-site support, or Microsoft 365 management as standard, making the real cost higher. Coreitech's all-inclusive pricing is £25/user/month (Standard) or £50/user/month (Advanced — full Microsoft 365 management, cyber security stack, dedicated account manager). No hidden charges.
Q.What should I check in an IT support company's reviews?
When reading IT support reviews, look for: specific mentions of response speed (not just "great service"); reviews from businesses similar to yours in size and sector; how the company handles things when they go wrong (not just when everything is fine); mentions of proactive monitoring catching issues early; and account manager quality. On Google, sort by "newest" to see current performance, not just historical reputation. Coreitech's most recent reviews are available on Google Maps — search "Coreitech London".
Q.Should I choose a large or small IT support company?
For most London SMEs, a mid-size IT support company (20–80 engineers) offers the best balance. Large IT companies (500+ staff) often over-engineer and over-charge for simple SME requirements, and account management becomes impersonal. Very small IT companies (1–5 staff) create single points of failure — illness or departure leaves you exposed. Coreitech operates at the right scale: large enough for specialist expertise and 24/7 coverage, small enough for personalised account management.
London IT Security Checklist
A practical 15-point checklist used by London IT managers to audit their security posture — covering everything from MFA to Cyber Essentials readiness. Download free, delivered instantly to your inbox.
- Multi-factor authentication (MFA) setup
- Email security & phishing protection
- Endpoint detection & response (EDR)
- Patch management policy
- Backup & disaster recovery plan
- GDPR data handling compliance
- Dark web credential monitoring
- Cyber Essentials readiness score
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IT support companies in London
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