# What does Blackbook use?

Blackbook (blackbook.dk) shows public evidence of 11 tools, according to runsonwhat (last checked 2026-10-09).

- Based in: København, Denmark
- Founded: 1996
- LinkedIn: https://www.linkedin.com/company/blackbook-dk

## 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 |  |

## 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 |
|---|---|---|---|
| [Sanity](https://www.runsonwhat.com/reverse/sanity) | Website & CMS | Website code |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Resend](https://www.runsonwhat.com/reverse/resend) | Email Delivery | Email records |  |
| [iCloud Mail](https://www.runsonwhat.com/reverse/icloud-mail) | Workspace | Email records |  |

## FAQ

### What tools does Blackbook use?

As of October 2026, runsonwhat has found 11 tools at Blackbook (blackbook.dk) in public records. Edge & Hosting: Cloudflare and Vercel. Application: React, Tailwind CSS and Next.js. Data & Observability: Vercel Analytics. Go-to-market: Sanity. Company Ops: Resend and iCloud Mail. Last checked October 9, 2026.

### What cloud does Blackbook run on?

Blackbook 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 46,658 companies runsonwhat tracks.

### What email provider does Blackbook use?

Blackbook uses iCloud Mail for email and office software, according to runsonwhat (October 2026). runsonwhat found iCloud Mail through email records that authorize iCloud Mail. iCloud Mail is used by 916 companies runsonwhat tracks.

### What analytics tools does Blackbook use?

Blackbook uses Vercel Analytics for analytics, according to runsonwhat (October 2026). runsonwhat found Vercel Analytics through Vercel Analytics code on blackbook.dk. Vercel Analytics is used by 7,421 companies runsonwhat tracks.

### What is Blackbook's website built with?

Blackbook uses Sanity for its website, according to runsonwhat (October 2026). runsonwhat found Sanity through Sanity code on blackbook.dk. Sanity is used by 4,709 companies runsonwhat tracks.

### Does Blackbook use Cloudflare?

Yes. runsonwhat found Cloudflare at Blackbook through DNS records that point at Cloudflare and code on blackbook.dk. Cloudflare is a CDN & Edge tool used by 692,707 companies runsonwhat tracks.

### Which companies have a tech stack similar to Blackbook's?

The companies with the stacks most like Blackbook's are MetaOriental Technology, Filiz, 株式会社テイツー and Builders Squad, according to runsonwhat (October 2026). Each shares 1 to 6 tools with Blackbook, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what Blackbook uses?

runsonwhat reads public records only. Of the 11 tools at Blackbook, 5 were found through code on blackbook.dk, 2 through DNS records, 2 through email records, 1 through website configuration files 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 blackbook.dk about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/blackbook.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.