# What does RSSL use? RSSL (rssl.com) shows public evidence of 22 tools, according to runsonwhat (last checked 2026-10-20). - Industry: Research - Size: 201–1,000 employees - Based in: Reading, United Kingdom - Founded: 1987 - LinkedIn: https://www.linkedin.com/company/rssl-training-consultancy ## Edge & Hosting | Tool | Category | Evidence | Since | |---|---|---|---| | [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | Website code | | | [Microsoft Azure](https://www.runsonwhat.com/reverse/azure) | Hosting & Cloud | Custom domain, Website code | | | [CSC](https://www.runsonwhat.com/reverse/csc-domains) | DNS | DNS records | | ## Application | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Fonts](https://www.runsonwhat.com/reverse/google-fonts) | Media & UI | Website code | | | [YouTube](https://www.runsonwhat.com/reverse/youtube) | Media & UI | Website code | | | [Tailwind CSS](https://www.runsonwhat.com/reverse/tailwind) | Frontend | Website code | | ## Data & Observability | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Analytics](https://www.runsonwhat.com/reverse/ga) | Analytics | Website code | | | [Google Tag Manager](https://www.runsonwhat.com/reverse/gtm) | Analytics | Website code | | | [Hotjar](https://www.runsonwhat.com/reverse/hotjar) | Analytics | Website code | | | [Azure Monitor](https://www.runsonwhat.com/reverse/azure-monitor) | Analytics | Website code | | | [Microsoft Application Insights](https://www.runsonwhat.com/reverse/microsoft-application-insights) | Monitoring | Website code | | ## Go-to-market | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Ads](https://www.runsonwhat.com/reverse/google-ads) | Ads & Pixels | Website code | | | [Meta Pixel](https://www.runsonwhat.com/reverse/meta-pixel) | Ads & Pixels | Website code | | | [LinkedIn Insight Tag](https://www.runsonwhat.com/reverse/linkedin-insight) | Ads & Pixels | Website code | | | [Umbraco](https://www.runsonwhat.com/reverse/umbraco) | Website & CMS | Website code | | ## Company Ops | Tool | Category | Evidence | Since | |---|---|---|---| | [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | Email records | | | [SendGrid](https://www.runsonwhat.com/reverse/sendgrid) | Email Delivery | Email records | | | [Proofpoint](https://www.runsonwhat.com/reverse/proofpoint) | Security & Compliance | Email records | | | [OneTrust](https://www.runsonwhat.com/reverse/onetrust) | Security & Compliance | Website code | | | [Adobe](https://www.runsonwhat.com/reverse/adobe) | Collaboration | DNS verification records | | | [DocuSign](https://www.runsonwhat.com/reverse/docusign) | Finance & Legal | DNS verification records, Website code | | ## FAQ ### What tools does RSSL use? As of October 2026, runsonwhat has found 22 tools at RSSL (rssl.com) in public records. Edge & Hosting: Cloudflare, Microsoft Azure and CSC. Application: Google Fonts, YouTube and Tailwind CSS. Data & Observability: Google Analytics, Google Tag Manager and Hotjar. Go-to-market: Google Ads, Meta Pixel and LinkedIn Insight Tag. Company Ops: Microsoft 365, SendGrid and Proofpoint. Last checked October 20, 2026. ### What cloud does RSSL run on? RSSL uses Microsoft Azure for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Microsoft Azure through a subdomain that points at Microsoft Azure and code on rssl.com. Microsoft Azure is used by 45,984 companies runsonwhat tracks. ### What email provider does RSSL use? RSSL uses Microsoft 365 for email and office software, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through email records that authorize Microsoft 365. Microsoft 365 is used by 705,155 companies runsonwhat tracks. ### What analytics tools does RSSL use? RSSL uses Google Analytics for analytics, alongside Google Tag Manager, Hotjar and Azure Monitor, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on rssl.com. Google Analytics is used by 861,277 companies runsonwhat tracks. ### What is RSSL's website built with? RSSL uses Umbraco for its website, according to runsonwhat (October 2026). runsonwhat found Umbraco through Umbraco code on rssl.com. Umbraco is used by 1,714 companies runsonwhat tracks. ### What monitoring tools does RSSL use? RSSL uses Microsoft Application Insights for monitoring, according to runsonwhat (October 2026). runsonwhat found Microsoft Application Insights through Microsoft Application Insights code on rssl.com. Microsoft Application Insights is used by 2,172 companies runsonwhat tracks. ### Does RSSL use Google Fonts? Yes. runsonwhat found Google Fonts at RSSL through Google Fonts code on rssl.com. Google Fonts is a Media & UI tool used by 797,178 companies runsonwhat tracks. ### Which companies have a tech stack similar to RSSL's? The companies with the stacks most like RSSL's are Vandcenter Syd, Proair Serviços Auxiliares De Transporte Aéreo Ltda, Crufts and Ekamant, according to runsonwhat (October 2026). Each shares 7 to 10 tools with RSSL, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what RSSL uses? runsonwhat reads public records only. Of the 22 tools at RSSL, 14 were found through code on rssl.com, 4 through DNS records, 3 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 rssl.com about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/rssl.com (updated October 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.