# What does NapkinBook use?

NapkinBook (napkinbook.com) shows public evidence of 8 tools, according to runsonwhat (last checked 2026-11-09).

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | Email records, DNS records, Website code |  |

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [SvelteKit](https://www.runsonwhat.com/reverse/sveltekit) | Frontend | Website code |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Let's Encrypt](https://www.runsonwhat.com/reverse/letsencrypt) | Security & Compliance | DNS records |  |
| [Sectigo](https://www.runsonwhat.com/reverse/sectigo) | Security & Compliance | DNS records |  |
| [DigiCert](https://www.runsonwhat.com/reverse/digicert) | Security & Compliance | DNS records |  |
| [Google Trust Services](https://www.runsonwhat.com/reverse/google-trust) | Security & Compliance | DNS records |  |

## FAQ

### What tools does NapkinBook use?

As of November 2026, runsonwhat has found 8 tools at NapkinBook (napkinbook.com) in public records. Edge & Hosting: Cloudflare. Application: SvelteKit. Company Ops: Let's Encrypt, Sectigo and DigiCert. Last checked November 9, 2026.

### Does NapkinBook use Cloudflare?

Yes. runsonwhat found Cloudflare at NapkinBook through email records that authorize Cloudflare and DNS records. Cloudflare is a CDN & Edge tool used by 733,761 companies runsonwhat tracks.

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

The companies with the stacks most like NapkinBook's are 724 Care, Trigger, Jaid and Kunga, according to runsonwhat (November 2026). Each shares 1 to 4 tools with NapkinBook, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what NapkinBook uses?

runsonwhat reads public records only. Of the 8 tools at NapkinBook, 4 were found through DNS records, 2 through code on napkinbook.com, 1 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 napkinbook.com about monthly.


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