OCS - UK's tech stack
What does OCS - UK use?
OCS - UK (citygroupsecurity.com) uses at least 19 tools we can see from public records, including Microsoft 365 for email and documents, Calendly for sales, Google Analytics for analytics and WordPress for its website. Last checked .
- Industry
- Security and Investigations
- Size
- 1,001–5,000 employees
- Based in
- London, United Kingdom
- Company page
- Tools found
- 19
- Categories
- 11
- Layers
- 5 of 5
- Last checked
- Oct 2026
OCS - UK'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
1 tool, where the bytes are served from
DNS
Application
6 tools, what the product is built with
Frontend
Search
Data & Observability
3 tools, what they measure and store
Go-to-market
5 tools, how they find and keep customers
Website & CMS
Ads & Pixels
Sales & CRM
Company Ops
4 tools, what the team runs on day to day
Email Delivery
Workspace
Security & Compliance
OCS - UK tech stack FAQ
What tools does OCS - UK use?
As of October 2026, runsonwhat has found 19 tools at OCS - UK (citygroupsecurity.com) in public records. Edge & Hosting: GoDaddy. Application: jQuery, Google Fonts and Vimeo. Data & Observability: Google Analytics, Google Tag Manager and Microsoft Clarity. Go-to-market: WordPress, Google Ads and Yoast SEO. Company Ops: Microsoft 365, reCAPTCHA and SendGrid. Last checked October 18, 2026.
What sales tools does OCS - UK use?
The sales tools runsonwhat has found at OCS - UK are Calendly (October 2026); no CRM shows up in OCS - UK's public records. runsonwhat found Calendly through Calendly code on citygroupsecurity.com. Calendly is used by 24,619 companies runsonwhat tracks.
What email provider does OCS - UK use?
OCS - UK uses Microsoft 365 for email and office software, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365 and email records. Microsoft 365 is used by 701,710 companies runsonwhat tracks.
What analytics tools does OCS - UK use?
OCS - UK uses Google Analytics for analytics, alongside Google Tag Manager and Microsoft Clarity, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on citygroupsecurity.com. Google Analytics is used by 853,379 companies runsonwhat tracks.
What is OCS - UK's website built with?
OCS - UK uses WordPress for its website, alongside Yoast SEO, according to runsonwhat (October 2026). runsonwhat found WordPress through WordPress code on citygroupsecurity.com. WordPress is used by 582,767 companies runsonwhat tracks.
Does OCS - UK use jQuery?
Yes. runsonwhat found jQuery at OCS - UK through jQuery code on citygroupsecurity.com. jQuery is a Frontend tool used by 897,845 companies runsonwhat tracks.
How does runsonwhat know what OCS - UK uses?
runsonwhat reads public records only. Of the 19 tools at OCS - UK, 16 were found through code on citygroupsecurity.com, 2 through DNS records and 1 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and citygroupsecurity.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.