# What does Castlabs use? Castlabs (castlabs.com) shows public evidence of 17 tools, according to runsonwhat (last checked 2026-11-10). - Industry: Software - Size: 51–200 employees - Based in: Berlin, Germany - Founded: 2007 - LinkedIn: https://www.linkedin.com/company/castlabs ## Edge & Hosting | Tool | Category | Evidence | Since | |---|---|---|---| | [Amazon Web Services](https://www.runsonwhat.com/reverse/aws) | Hosting & Cloud | Custom domain, Website code | | | [Amazon Route 53](https://www.runsonwhat.com/reverse/route53) | DNS | DNS records | | | [Google Cloud](https://www.runsonwhat.com/reverse/gcp) | Hosting & Cloud | Custom domain | | | [Amazon CloudFront](https://www.runsonwhat.com/reverse/cloudfront) | CDN & Edge | Custom domain | 2026-10 | ## Data & Observability | Tool | Category | Evidence | Since | |---|---|---|---| | [Matomo](https://www.runsonwhat.com/reverse/matomo) | Analytics | Website code | | | [Atlassian Statuspage](https://www.runsonwhat.com/reverse/statuspage) | Monitoring | DNS verification records, Email records, Website code | | ## 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 | | | [HubSpot](https://www.runsonwhat.com/reverse/hubspot) | Sales & CRM | Email records, Website code | | ## Company Ops | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | Email records | | | [Atlassian](https://www.runsonwhat.com/reverse/atlassian) | Dev Tools | DNS verification records | | | [Amazon SES](https://www.runsonwhat.com/reverse/ses) | Email Delivery | Email records, Website code | | | [KnowBe4](https://www.runsonwhat.com/reverse/knowbe4) | Security & Compliance | DNS verification records, Email records | | | [Teamtailor](https://www.runsonwhat.com/reverse/teamtailor) | People & HR | Custom domain | | | [HubSpot App Developer](https://www.runsonwhat.com/reverse/hubspot-developer) | Dev Tools | DNS verification records | | ## Recent changes at Castlabs - 2026-11-10: started using [Amazon CloudFront](https://www.runsonwhat.com/reverse/cloudfront) ## FAQ ### What tools does Castlabs use? As of November 2026, runsonwhat has found 17 tools at Castlabs (castlabs.com) in public records. Edge & Hosting: Amazon Web Services, Amazon Route 53 and Google Cloud. Data & Observability: Matomo and Atlassian Statuspage. Go-to-market: WordPress, Yoast SEO and HubSpot. Company Ops: Google Workspace, Atlassian and Amazon SES. Last checked November 10, 2026. ### What cloud does Castlabs run on? Castlabs uses Amazon Web Services for hosting and cloud infrastructure, alongside Google Cloud, according to runsonwhat (November 2026). runsonwhat found Amazon Web Services through a subdomain that points at Amazon Web Services and code on castlabs.com. Amazon Web Services is used by 147,486 companies runsonwhat tracks. ### What CRM does Castlabs use? Castlabs uses HubSpot for its CRM, according to runsonwhat (November 2026). runsonwhat found HubSpot through email records that authorize HubSpot and code on castlabs.com. HubSpot is used by 97,635 companies runsonwhat tracks. ### What email provider does Castlabs use? Castlabs uses Google Workspace for email and office software, according to runsonwhat (November 2026). runsonwhat found Google Workspace through email records that authorize Google Workspace. Google Workspace is used by 420,128 companies runsonwhat tracks. ### What analytics tools does Castlabs use? Castlabs uses Matomo for analytics, according to runsonwhat (November 2026). runsonwhat found Matomo through Matomo code on castlabs.com. Matomo is used by 35,800 companies runsonwhat tracks. ### What is Castlabs's website built with? Castlabs uses WordPress for its website, alongside Yoast SEO, according to runsonwhat (November 2026). runsonwhat found WordPress through WordPress code on castlabs.com. WordPress is used by 606,802 companies runsonwhat tracks. ### How long has Castlabs used Amazon CloudFront? Castlabs has used Amazon CloudFront since at least October 2026, going by the first public certificate of the castlabs.com subdomain that points at Amazon CloudFront. ### Does Castlabs use Amazon Route 53? Yes. runsonwhat found Amazon Route 53 at Castlabs through DNS records that point at Amazon Route 53. Amazon Route 53 is a DNS tool used by 88,689 companies runsonwhat tracks. ### Has Castlabs changed tools recently? Yes. On runsonwhat's rechecks, Castlabs started using Amazon CloudFront (latest on November 10, 2026). A change counts only between two checks of castlabs.com done the same way. ### Which companies have a tech stack similar to Castlabs's? The companies with the stacks most like Castlabs' are Nexla, Pi Datametrics, Chathero and Stibo Systems, according to runsonwhat (November 2026). Each shares 4 to 10 tools with Castlabs, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what Castlabs uses? runsonwhat reads public records only. Of the 17 tools at Castlabs, 6 were found through DNS records, 4 through subdomains that point at the vendor, 3 through code on castlabs.com, 3 through email records and 1 through website configuration files. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and castlabs.com about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/castlabs.com (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.