runsonwhat

CSL's tech stack

What does CSL use?

CSL (csl-group.com) uses at least 28 tools we can see from public records, including Amazon Web Services for hosting, Microsoft 365 for email and documents, Salesforce for sales and Archbee for customer support. Last checked .

Industry
Internet
Size
201–1,000 employees
Based in
Watford, United Kingdom
Founded
1996
LinkedIn
Company page
Re-check liveVisit csl-group.com
Tools found
28
Categories
16
Oldest proven tool
May 2022
Last checked
Oct 2026

CSL's stack, layer by layer

Each tool links to the other companies we've found using it. The label says what kind of public trace gave it away.

Edge & Hosting

2 tools, where the bytes are served from

Hosting & Cloud

Application

4 tools, what the product is built with

Frontend

AI

Media & UI

Data & Observability

5 tools, what they measure and store

Monitoring

Analytics

Go-to-market

10 tools, how they find and keep customers

Website & CMS

Marketing

Ads & Pixels

Sales & CRM

Support & Docs

Company Ops

7 tools, what the team runs on day to day

Email Delivery

Workspace

Collaboration

Dev Tools

Security & Compliance

What changed at CSL

Using since

Dates come from the first certificate of the subdomain that points at the tool.

  1. Status.io

Companies like CSL also use

Tools common among companies with a similar stack that we haven't found at CSL.

Companies with a stack like CSL's

Ranked by shared tools, with rare tools counting more.

More Internet companies

Other Internet companies we've checked.

CSL tech stack FAQ

What tools does CSL use?

As of October 2026, runsonwhat has found 28 tools at CSL (csl-group.com) in public records. Edge & Hosting: Amazon Web Services and Microsoft Azure. Application: jQuery, Google Fonts and YouTube. Data & Observability: Google Analytics, Google Tag Manager and Hotjar. Go-to-market: WordPress, Google Ads and Yoast SEO. Company Ops: Microsoft 365, SendGrid and Apple Business. Last checked October 19, 2026.

What cloud does CSL run on?

CSL uses Amazon Web Services for hosting and cloud infrastructure, alongside Microsoft Azure, according to runsonwhat (October 2026). runsonwhat found Amazon Web Services through Amazon Web Services code on csl-group.com. Amazon Web Services is used by 145,080 companies runsonwhat tracks.

What CRM does CSL use?

CSL uses Salesforce for its CRM, alongside Lead Forensics, according to runsonwhat (October 2026). runsonwhat found Salesforce through email records that authorize Salesforce and code on csl-group.com. Salesforce is used by 33,683 companies runsonwhat tracks.

What email provider does CSL use?

CSL uses Microsoft 365 for email and office software, alongside Apple Business, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through email records that authorize Microsoft 365 and code on csl-group.com. Microsoft 365 is used by 705,068 companies runsonwhat tracks.

What does CSL use for customer support?

CSL uses Archbee for customer support and documentation, according to runsonwhat (October 2026). runsonwhat found Archbee through a subdomain that points at Archbee. Archbee is used by 142 companies runsonwhat tracks.

What analytics tools does CSL use?

CSL uses Google Analytics for analytics, alongside Google Tag Manager and Hotjar, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on csl-group.com. Google Analytics is used by 858,760 companies runsonwhat tracks.

How long has CSL used Status.io?

CSL has used Status.io since at least May 2022, going by the first public certificate of the csl-group.com subdomain that points at Status.io.

Does CSL use jQuery?

Yes. runsonwhat found jQuery at CSL through jQuery code on csl-group.com. jQuery is a Frontend tool used by 901,800 companies runsonwhat tracks.

Does CSL use AI tools?

Yes. runsonwhat has found Anthropic at CSL; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so CSL may use more AI tools than these.

Which companies have a tech stack similar to CSL's?

The companies with the stacks most like CSL's are Terso Solutions, Iot Venture, LumApps and Illumio, according to runsonwhat (October 2026). Each shares 3 to 14 tools with CSL, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

How does runsonwhat know what CSL uses?

runsonwhat reads public records only. Of the 28 tools at CSL, 14 were found through code on csl-group.com, 6 through DNS records, 4 through email records and 4 through subdomains that point at the vendor. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and csl-group.com about monthly.

We read public traces only: DNS and email records, certificate logs, website code and published subprocessor lists. A tool is listed when a direct record backs it up, and dropped when a recheck no longer finds it. Is this your company? See how to opt out.