# What does ESO use?

ESO (eso.org) shows public evidence of 15 tools, according to runsonwhat (last checked 2026-11-15).

- LinkedIn: https://www.linkedin.com/company/european-southern-observatory

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | Website code |  |
| [CDN77](https://www.runsonwhat.com/reverse/cdn77) | CDN & Edge | Custom domain |  |

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [jQuery](https://www.runsonwhat.com/reverse/jquery) | Frontend | Website code |  |
| [YouTube](https://www.runsonwhat.com/reverse/youtube) | Media & UI | Website code |  |
| [Monotype Fonts](https://www.runsonwhat.com/reverse/fonts-com) | Media & UI | Website code |  |
| [JW Player](https://www.runsonwhat.com/reverse/jw-player) | Media & UI | Website code |  |

## Data & Observability

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Matomo](https://www.runsonwhat.com/reverse/matomo) | Analytics | Website code |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Mailchimp](https://www.runsonwhat.com/reverse/mailchimp) | Marketing | Email records |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | DNS verification records, Email records, Website code |  |
| [Apple Business](https://www.runsonwhat.com/reverse/apple) | Workspace | DNS verification records |  |
| [Adobe](https://www.runsonwhat.com/reverse/adobe) | Collaboration | DNS verification records |  |
| [Webex](https://www.runsonwhat.com/reverse/webex) | Collaboration | DNS verification records |  |
| [Jamf](https://www.runsonwhat.com/reverse/jamf) | Security & Compliance | DNS verification records |  |
| [Autodesk](https://www.runsonwhat.com/reverse/autodesk) | Collaboration | DNS verification records |  |

## FAQ

### What tools does ESO use?

As of November 2026, runsonwhat has found 15 tools at ESO (eso.org) in public records. Edge & Hosting: Cloudflare and CDN77. Application: jQuery, YouTube and Monotype Fonts. Data & Observability: Matomo. Go-to-market: Mailchimp. Company Ops: Microsoft 365, Apple Business and Adobe. Last checked November 15, 2026.

### What email provider does ESO use?

ESO uses Microsoft 365 for email and office software, alongside Apple Business, according to runsonwhat (November 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365 and email records. Microsoft 365 is used by 739,099 companies runsonwhat tracks.

### What analytics tools does ESO use?

ESO uses Matomo for analytics, according to runsonwhat (November 2026). runsonwhat found Matomo through Matomo code on eso.org. Matomo is used by 35,876 companies runsonwhat tracks.

### What marketing software does ESO use?

ESO uses Mailchimp for marketing, according to runsonwhat (November 2026). runsonwhat found Mailchimp through email records that authorize Mailchimp. Mailchimp is used by 119,453 companies runsonwhat tracks.

### Does ESO use jQuery?

Yes. runsonwhat found jQuery at ESO through jQuery code on eso.org. jQuery is a Frontend tool used by 927,638 companies runsonwhat tracks.

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

The companies with the stacks most like ESO's are Betonline, Electronic Team, Audiomeans and flirtify.com, according to runsonwhat (November 2026). Each shares 3 to 5 tools with ESO, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what ESO uses?

runsonwhat reads public records only. Of the 15 tools at ESO, 7 were found through DNS records, 6 through code on eso.org, 1 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 eso.org about monthly.


---

Source: runsonwhat, https://www.runsonwhat.com/company/eso.org (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.