# What does BIG use? BIG (big.dk) shows public evidence of 21 tools, according to runsonwhat (last checked 2026-10-19). - Industry: Architecture & Planning - Size: 201–1,000 employees - Based in: Brooklyn, United States - Founded: 2005 - LinkedIn: https://www.linkedin.com/company/bjarke-ingels-group ## Edge & Hosting | Tool | Category | Evidence | Since | |---|---|---|---| | [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | DNS records, Website code | | | [Vercel](https://www.runsonwhat.com/reverse/vercel) | Hosting & Cloud | Custom domain, DNS verification records, DNS records, Website code | | ## Application | Tool | Category | Evidence | Since | |---|---|---|---| | [React](https://www.runsonwhat.com/reverse/react) | Frontend | Website code | | | [Tailwind CSS](https://www.runsonwhat.com/reverse/tailwind) | Frontend | Website code | | | [Next.js](https://www.runsonwhat.com/reverse/nextjs) | Frontend | Website code | | | [Anthropic](https://www.runsonwhat.com/reverse/anthropic) | AI | DNS verification records | | | [OpenAI](https://www.runsonwhat.com/reverse/openai) | AI | DNS verification records | | ## Data & Observability | Tool | Category | Evidence | Since | |---|---|---|---| | [Vercel Analytics](https://www.runsonwhat.com/reverse/vercel-analytics) | Analytics | Website code | | ## Go-to-market | Tool | Category | Evidence | Since | |---|---|---|---| | [Mailchimp](https://www.runsonwhat.com/reverse/mailchimp) | Marketing | Website code | | ## Company Ops | Tool | Category | Evidence | Since | |---|---|---|---| | [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | Email records, DNS verification records, Website code | | | [Apple Business](https://www.runsonwhat.com/reverse/apple) | Workspace | DNS verification records | | | [Mailchimp Transactional](https://www.runsonwhat.com/reverse/mandrill) | Email Delivery | Email records | | | [GlobalSign](https://www.runsonwhat.com/reverse/globalsign) | Security & Compliance | DNS verification records | | | [Adobe](https://www.runsonwhat.com/reverse/adobe) | Collaboration | DNS verification records | | | [dmarcian](https://www.runsonwhat.com/reverse/dmarcian) | Security & Compliance | Email records | | | [Miro](https://www.runsonwhat.com/reverse/miro) | Collaboration | DNS verification records | | | [Bitwarden](https://www.runsonwhat.com/reverse/bitwarden) | Security & Compliance | DNS verification records | | | [Autodesk](https://www.runsonwhat.com/reverse/autodesk) | Collaboration | DNS verification records | | | [Airalo](https://www.runsonwhat.com/reverse/airalo) | Other traces | DNS verification records | | | [SAP Concur](https://www.runsonwhat.com/reverse/sap-concur) | Finance & Legal | Email records | | ## FAQ ### What tools does BIG use? As of October 2026, runsonwhat has found 21 tools at BIG (big.dk) in public records. Edge & Hosting: Cloudflare and Vercel. Application: React, Tailwind CSS and Next.js. Data & Observability: Vercel Analytics. Go-to-market: Mailchimp. Company Ops: Microsoft 365, Apple Business and Mailchimp Transactional. Last checked October 19, 2026. ### What cloud does BIG run on? BIG uses Vercel for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Vercel through a subdomain that points at Vercel and a DNS verification record. Vercel is used by 47,250 companies runsonwhat tracks. ### What email provider does BIG use? BIG 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 a DNS verification record. Microsoft 365 is used by 705,100 companies runsonwhat tracks. ### What analytics tools does BIG use? BIG uses Vercel Analytics for analytics, according to runsonwhat (October 2026). runsonwhat found Vercel Analytics through Vercel Analytics code on big.dk. Vercel Analytics is used by 7,472 companies runsonwhat tracks. ### What marketing software does BIG use? BIG uses Mailchimp for marketing, according to runsonwhat (October 2026). runsonwhat found Mailchimp through Mailchimp code on big.dk. Mailchimp is used by 113,655 companies runsonwhat tracks. ### Does BIG use Cloudflare? Yes. runsonwhat found Cloudflare at BIG through DNS records that point at Cloudflare and code on big.dk. Cloudflare is a CDN & Edge tool used by 695,961 companies runsonwhat tracks. ### Does BIG use AI tools? Yes. runsonwhat has found Anthropic and OpenAI at BIG; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so BIG may use more AI tools than these. ### Which companies have a tech stack similar to BIG's? The companies with the stacks most like BIG's are Interone, Chicken Treat, Travel Leaders Group and NeoGen, according to runsonwhat (October 2026). Each shares 6 to 9 tools with BIG, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what BIG uses? runsonwhat reads public records only. Of the 21 tools at BIG, 11 were found through DNS records, 5 through code on big.dk, 4 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 big.dk about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/big.dk (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.