runsonwhat

Sjef's tech stack

What does Sjef use?

Sjef (sjef.app) uses at least 22 tools we can see from public records, including DigitalOcean for hosting, Google Workspace for email and documents, HubSpot for sales and Google Analytics for analytics. Last checked .

Industry
Internet
Size
11–50 employees
Based in
Amsterdam, Nederland
Founded
2020
LinkedIn
Company page
Re-check liveVisit sjef.app
Tools found
22
Categories
12
Layers
5 of 5
Last checked
Oct 2026

Sjef's stack, layer by layer

Each tool links to the other companies we've found using it. The label says what kind of public trace gave it away.

Edge & Hosting

1 tool, where the bytes are served from

Hosting & Cloud

Application

1 tool, what the product is built with

Frontend

Data & Observability

3 tools, what they measure and store

Analytics

Go-to-market

11 tools, how they find and keep customers

Website & CMS

Marketing

Ads & Pixels

Sales & CRM

Company Ops

6 tools, what the team runs on day to day

Email Delivery

Workspace

Collaboration

Dev Tools

Security & Compliance

Companies like Sjef also use

Tools common among companies with a similar stack that we haven't found at Sjef.

Companies with a stack like Sjef's

Ranked by shared tools, with rare tools counting more.

More Internet companies

Other Internet companies we've checked.

Sjef tech stack FAQ

What tools does Sjef use?

As of October 2026, runsonwhat has found 22 tools at Sjef (sjef.app) in public records. Edge & Hosting: DigitalOcean. Application: jQuery. Data & Observability: Google Analytics, Google Tag Manager and Hotjar. Go-to-market: WordPress, Google Ads and Meta Pixel. Company Ops: Google Workspace, Cookiebot and Atlassian. Last checked October 21, 2026.

What cloud does Sjef run on?

Sjef uses DigitalOcean for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found DigitalOcean through DNS records that point at DigitalOcean. DigitalOcean is used by 7,314 companies runsonwhat tracks.

What CRM does Sjef use?

Sjef uses HubSpot for its CRM, alongside Leadinfo, according to runsonwhat (October 2026). runsonwhat found HubSpot through email records that authorize HubSpot and code on sjef.app. HubSpot is used by 95,117 companies runsonwhat tracks.

What email provider does Sjef use?

Sjef uses Google Workspace for email and office software, according to runsonwhat (October 2026). runsonwhat found Google Workspace through email records that authorize Google Workspace and code on sjef.app. Google Workspace is used by 406,845 companies runsonwhat tracks.

What analytics tools does Sjef use?

Sjef uses Google Analytics for analytics, alongside Google Tag Manager and Hotjar, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on sjef.app. Google Analytics is used by 892,339 companies runsonwhat tracks.

What is Sjef's website built with?

Sjef uses WordPress for its website, alongside Rank Math and Weglot, according to runsonwhat (October 2026). runsonwhat found WordPress through WordPress code on sjef.app. WordPress is used by 601,844 companies runsonwhat tracks.

Does Sjef use jQuery?

Yes. runsonwhat found jQuery at Sjef through jQuery code on sjef.app. jQuery is a Frontend tool used by 922,712 companies runsonwhat tracks.

Which companies have a tech stack similar to Sjef's?

The companies with the stacks most like Sjef's are Save My Exams, Wbtcamps, Digitale Binnenhof Academy and Renesas, according to runsonwhat (October 2026). Each shares 2 to 9 tools with Sjef, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

How does runsonwhat know what Sjef uses?

runsonwhat reads public records only. Of the 22 tools at Sjef, 13 were found through code on sjef.app, 5 through email records and 4 through DNS records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and sjef.app about monthly.

We read public traces only: DNS and email records, certificate logs, website code and published subprocessor lists. A tool is listed when a direct record backs it up, and dropped when a recheck no longer finds it. Is this your company? See how to opt out.