# What does Celcat use? Celcat (celcat.fr) shows public evidence of 21 tools, according to runsonwhat (last checked 2026-11-08). - Industry: Software - Size: 11–50 employees - Based in: Coleshill, United Kingdom - Founded: 1979 - LinkedIn: https://www.linkedin.com/company/celcat-france ## Edge & Hosting | Tool | Category | Evidence | Since | |---|---|---|---| | [Amazon Web Services](https://www.runsonwhat.com/reverse/aws) | Hosting & Cloud | Website code | | | [Amazon Route 53](https://www.runsonwhat.com/reverse/route53) | DNS | DNS records | | ## Application | Tool | Category | Evidence | Since | |---|---|---|---| | [jQuery](https://www.runsonwhat.com/reverse/jquery) | Frontend | Website code | | | [Google Fonts](https://www.runsonwhat.com/reverse/google-fonts) | Media & UI | Website code | | | [Anthropic](https://www.runsonwhat.com/reverse/anthropic) | AI | DNS verification records | | | [OpenAI](https://www.runsonwhat.com/reverse/openai) | AI | DNS verification records | | | [MongoDB Atlas](https://www.runsonwhat.com/reverse/mongodb) | Backend & Database | DNS verification records | | ## Go-to-market | Tool | Category | Evidence | Since | |---|---|---|---| | [WordPress](https://www.runsonwhat.com/reverse/wordpress) | Website & CMS | Website code | | | [Yoast SEO](https://www.runsonwhat.com/reverse/yoast) | Website & CMS | Website code | | | [Mailchimp](https://www.runsonwhat.com/reverse/mailchimp) | Marketing | Email records | | | [Pardot](https://www.runsonwhat.com/reverse/pardot) | Marketing | DNS verification records, Website code | | | [ZoomInfo](https://www.runsonwhat.com/reverse/zoominfo) | Sales & CRM | Website code | | | [Freshdesk](https://www.runsonwhat.com/reverse/freshdesk) | Support & Docs | Custom domain, Email records | | | [Salesloft](https://www.runsonwhat.com/reverse/salesloft) | Sales & CRM | Website code | | ## Company Ops | Tool | Category | Evidence | Since | |---|---|---|---| | [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | DNS verification records, Email records, Website code | | | [reCAPTCHA](https://www.runsonwhat.com/reverse/recaptcha) | Security & Compliance | Website code | | | [Atlassian](https://www.runsonwhat.com/reverse/atlassian) | Dev Tools | DNS verification records | | | [KnowBe4](https://www.runsonwhat.com/reverse/knowbe4) | Security & Compliance | DNS verification records | | | [Bitwarden](https://www.runsonwhat.com/reverse/bitwarden) | Security & Compliance | DNS verification records | | | [AuthSMTP](https://www.runsonwhat.com/reverse/authsmtp) | Email Delivery | Email records | | | [SpyCloud](https://www.runsonwhat.com/reverse/spycloud) | Security & Compliance | DNS verification records | | ## Recent changes at Celcat - 2026-10-31: started using [Bitwarden](https://www.runsonwhat.com/reverse/bitwarden) - 2026-10-31: started using [MongoDB Atlas](https://www.runsonwhat.com/reverse/mongodb) ## FAQ ### What tools does Celcat use? As of November 2026, runsonwhat has found 21 tools at Celcat (celcat.fr) in public records. Edge & Hosting: Amazon Web Services and Amazon Route 53. Application: jQuery, Google Fonts and Anthropic. Go-to-market: WordPress, Yoast SEO and Mailchimp. Company Ops: Microsoft 365, reCAPTCHA and Atlassian. Last checked November 8, 2026. ### What cloud does Celcat run on? Celcat uses Amazon Web Services for hosting and cloud infrastructure, according to runsonwhat (November 2026). runsonwhat found Amazon Web Services through Amazon Web Services code on celcat.fr. Amazon Web Services is used by 147,242 companies runsonwhat tracks. ### What sales tools does Celcat use? The sales tools runsonwhat has found at Celcat are ZoomInfo and Salesloft (November 2026); no CRM shows up in Celcat's public records. runsonwhat found ZoomInfo through ZoomInfo code on celcat.fr. ### What email provider does Celcat use? Celcat uses Microsoft 365 for email and office software, according to runsonwhat (November 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365 and email records. Microsoft 365 is used by 729,214 companies runsonwhat tracks. ### What does Celcat use for customer support? Celcat uses Freshdesk for customer support and documentation, according to runsonwhat (November 2026). runsonwhat found Freshdesk through a subdomain that points at Freshdesk and email records. Freshdesk is used by 12,847 companies runsonwhat tracks. ### What is Celcat's website built with? Celcat uses WordPress for its website, alongside Yoast SEO, according to runsonwhat (November 2026). runsonwhat found WordPress through WordPress code on celcat.fr. WordPress is used by 606,869 companies runsonwhat tracks. ### Does Celcat use jQuery? Yes. runsonwhat found jQuery at Celcat through jQuery code on celcat.fr. jQuery is a Frontend tool used by 928,199 companies runsonwhat tracks. ### Does Celcat use AI tools? Yes. runsonwhat has found Anthropic and OpenAI at Celcat; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so Celcat may use more AI tools than these. ### Has Celcat changed tools recently? Yes. On runsonwhat's rechecks, Celcat started using Bitwarden and MongoDB Atlas (latest on October 31, 2026). A change counts only between two checks of celcat.fr done the same way. ### Which companies have a tech stack similar to Celcat's? The companies with the stacks most like Celcat's are Thompson Street Capital Partners, Zoom Communications, Red Bull New York and Prodrive Technologies, according to runsonwhat (November 2026). Each shares 5 to 9 tools with Celcat, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what Celcat uses? runsonwhat reads public records only. Of the 21 tools at Celcat, 10 were found through DNS records, 8 through code on celcat.fr, 2 through email records and 1 through subdomains that point at the vendor. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and celcat.fr about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/celcat.fr (updated November 2026). Counts are companies with direct public evidence of the tool (DNS records, certificates, website code, a real-browser crawl, subprocessor lists), so they are lower bounds. Methodology: https://www.runsonwhat.com/methodology.