MSP-GB-XX-CSL-GROUP
CSL Group
Managed service provider · Watford
270 staffFounded 199624/7
Last checked 8 Nov 2026 · 28 sourced facts
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“CSL is the trusted partner for connectivity for regulated environments. Private, secure, and resilient, with full end-to-end control.”reported by the company · csl-group.com · 8 Nov 2026
- Staff / size
- 270
- Founded
- 199630 yrs
- Offices
- 5
- Services
- 8of 13
- Industries
- 6
- Stack tools
- 0
- Certifications
- 1
- Support
- 24/7
1Stack: the tools we found
- PSA / ticketingnot found
- RMMnot found
- Remote accessnot found
- Documentationnot found
- Securitynot found
- Backupnot found
- MailMicrosoft 365DNS
Marks: DNS detected in public DNS, Site named or badged on their site, Job ad named in their job ad. “Not found” means not seen on public pages, not “not used”. See how we check.
Every tool with its source
| Tool | How we know |
|---|---|
| Microsoft 365 (own mail) | detected (public DNS) · csl-group.com · 8 Nov 2026 |
2Services coverage
- Help desk / IT support (not found)
- Co-managed IT (not found)
- NOC / monitoring (offered)
- SOC / MDR (not found)
- Cybersecurity (offered)
- Cloud / Microsoft 365 / Azure (not found)
- Backup / disaster recovery (offered)
- Compliance (offered)
- VoIP / UCaaS (offered)
- Networking (offered)
- IT procurement (offered)
- vCIO / consulting (not found)
- AI services (offered)
From csl-group.com/solutions/rsim/, csl-group.com, csl-group.com/solutions/voicelink/, csl-group.com/sectors/public-sector/. Empty squares: not found on their pages.
Compliance frameworks named: ISO 27001
3Industries served
HealthcarepageGovernment / public sectorpageRetailpageHospitalitypageLogistics & transportpageEnergy & utilitiespage
| Client size targeted | not published |
|---|
From the MSP’s industry pages and case studies. Sources: /sectors/healthcare-telecare/, /sectors/public-sector/, /sectors/retail-hospitality/, /sectors/transport-logistics/, /sectors/utilities/.
4Support model
24 hours, 7 days (as published)
| Support hours | 24/7reported by the company · csl-group.com · 8 Nov 2026 |
|---|---|
| Published hours | not published |
| 24/7 monitoring | not published |
| After-hours / emergency line | not published |
| Help desk location | not published |
| Response time / SLA | not published |
5Location and company
| Headquarters | CSL Group, Building 4, Croxley Green Business Park, Hatters Ln, Watford WD18 8YF, United KingdomGoogle Maps listing · google.com · 8 Nov 2026 |
|---|---|
| Other offices | Tyne · Cynon Taff · Berkshire · Nottinghamreported by the company · csl-group.com · 8 Nov 2026 |
| Service area (as published) | not published |
| Trading name | CSL GroupGoogle Maps listing · google.com · 8 Nov 2026 |
| Legal name | not published |
| Companies House | not published |
| Phone (switchboard) | +44 1895 474474Google Maps listing · google.com · 8 Nov 2026 |
| Business mailbox | sales@csl-group.comreported by the company · csl-group.com · 8 Nov 2026 |
| Ownership | not published |
| Google rating | 4.9 / 5 from 222 reviewsGoogle Maps listing · google.com · 7 Nov 2026 |
6Size, certifications and peers
| Staff (their site) | 270reported by the company · csl-group.com · 8 Nov 2026 |
|---|---|
| Size band | 201–500 staffreported by the company · csl-group.com · 8 Nov 2026 |
| LinkedIn company size | 201-500 employeesreported by the company · uk.linkedin.com · 8 Nov 2026 |
| Clients (as published) | not published |
| Microsoft partner | not published |
| Vendor partner tiers | not published |
| Own certifications | Cyber Essentials Plusreported by the company · csl-group.com · 8 Nov 2026 |
- Larger than 91% of the 1,471 MSPs in the UK with a known size.
- 0 stack tools found vs a median of 2 across 2,540 fully researched UK MSPs.
- 8 of 13 services vs a median of 8.
From the public profiles on MSP Scope (sample sizes shown). Facts not found count as not found, so small or quiet websites score lower.
7Timeline
- 1996Foundedreported by the company · csl-group.com · 8 Nov 2026
Only dated, sourced items. Acquisitions and rebrands appear here when the MSP or a public register states them.
8Pricing (as published)
no prices published on the pages we read
Only prices the MSP publishes for its own managed service (per user or per device). See published MSP pricing.
9Revision history and sources
Researched 8 Nov 2026 (full pass), last checked 8 Nov 2026. 17 public pages read.
Logo: from csl-group.com, the MSP’s own site, seen 8 Nov 2026; trimmed and resized only. Remove or replace it.
Pages we read
- www.csl-group.com/
- www.csl-group.com/about/
- www.csl-group.com/solutions/rsim/
- www.csl-group.com/solutions/voicelink/
- www.csl-group.com/solutions/iot-routers/
- www.csl-group.com/contact-us/
- www.csl-group.com/sectors/utilities/
- www.csl-group.com/sectors/industrial/
- www.csl-group.com/sectors/public-sector/
- www.csl-group.com/sectors/infrastructure/
- www.csl-group.com/partners/
- www.csl-group.com/partners/portal/
- www.csl-group.com/careers/
- www.csl-group.com/support/
- www.csl-group.com/sectors/building-security/
- www.csl-group.com/solutions/fire-and-security/
- www.csl-group.com/news/
Anything not found stays empty. We never guess. Spot an error? Correct it.