# What does C3 Systems use?

C3 Systems (c3systems.es) shows public evidence of 21 tools, according to runsonwhat (last checked 2026-11-08).

- Industry: Construction
- Size: 51–200 employees
- Based in: Alicante, Spain
- Founded: 2009
- LinkedIn: https://www.linkedin.com/company/c3-systems-s.l

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [jQuery](https://www.runsonwhat.com/reverse/jquery) | Frontend | Website code |  |
| [Google Fonts](https://www.runsonwhat.com/reverse/google-fonts) | Media & UI | Website code |  |
| [Font Awesome](https://www.runsonwhat.com/reverse/fontawesome) | Media & UI | Website code |  |
| [Vimeo](https://www.runsonwhat.com/reverse/vimeo) | Media & UI | Website code |  |
| [YouTube](https://www.runsonwhat.com/reverse/youtube) | Media & UI | Website code |  |
| [GSAP](https://www.runsonwhat.com/reverse/gsap) | Media & UI | Website code |  |
| [Google Maps](https://www.runsonwhat.com/reverse/google-maps) | Media & UI | Website code |  |
| [Anthropic](https://www.runsonwhat.com/reverse/anthropic) | AI | DNS verification records |  |

## Data & Observability

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Analytics](https://www.runsonwhat.com/reverse/ga) | Analytics | Website code |  |
| [Google Tag Manager](https://www.runsonwhat.com/reverse/gtm) | Analytics | Website code |  |
| [Contentsquare](https://www.runsonwhat.com/reverse/contentsquare) | Analytics | Website code |  |
| [Mouseflow](https://www.runsonwhat.com/reverse/mouseflow) | Analytics | Website code |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Ads](https://www.runsonwhat.com/reverse/google-ads) | Ads & Pixels | Website code |  |
| [Meta Pixel](https://www.runsonwhat.com/reverse/meta-pixel) | Ads & Pixels | Website code |  |
| [Mailchimp](https://www.runsonwhat.com/reverse/mailchimp) | Marketing | Email records |  |
| [Pinterest](https://www.runsonwhat.com/reverse/pinterest) | Ads & Pixels | Website code |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | DNS verification records, Email records, Website code |  |
| [reCAPTCHA](https://www.runsonwhat.com/reverse/recaptcha) | Security & Compliance | Website code |  |
| [Exclaimer](https://www.runsonwhat.com/reverse/exclaimer) | Workspace | Email records |  |
| [Amazon Business](https://www.runsonwhat.com/reverse/amazon-business) | Finance & Legal | DNS verification records |  |

## Recent changes at C3 Systems

- 2026-10-31: started using [Anthropic](https://www.runsonwhat.com/reverse/anthropic)

## FAQ

### What tools does C3 Systems use?

As of November 2026, runsonwhat has found 21 tools at C3 Systems (c3systems.es) in public records. Application: jQuery, Google Fonts and Font Awesome. Data & Observability: Google Analytics, Google Tag Manager and Contentsquare. Go-to-market: Google Ads, Meta Pixel and Mailchimp. Company Ops: Microsoft 365, reCAPTCHA and Exclaimer. Last checked November 8, 2026.

### What email provider does C3 Systems use?

C3 Systems uses Microsoft 365 for email and office software, alongside Exclaimer, 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 739,072 companies runsonwhat tracks.

### What analytics tools does C3 Systems use?

C3 Systems uses Google Analytics for analytics, alongside Google Tag Manager, Contentsquare and Mouseflow, according to runsonwhat (November 2026). runsonwhat found Google Analytics through Google Analytics code on c3systems.es. Google Analytics is used by 904,904 companies runsonwhat tracks.

### What marketing software does C3 Systems use?

C3 Systems uses Mailchimp for marketing, according to runsonwhat (November 2026). runsonwhat found Mailchimp through email records that authorize Mailchimp. Mailchimp is used by 119,472 companies runsonwhat tracks.

### Does C3 Systems use jQuery?

Yes. runsonwhat found jQuery at C3 Systems through jQuery code on c3systems.es. jQuery is a Frontend tool used by 927,893 companies runsonwhat tracks.

### Does C3 Systems use AI tools?

Yes. runsonwhat has found Anthropic at C3 Systems; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so C3 Systems may use more AI tools than these.

### Has C3 Systems changed tools recently?

Yes. On runsonwhat's rechecks, C3 Systems started using Anthropic (latest on October 31, 2026). A change counts only between two checks of c3systems.es done the same way.

### Which companies have a tech stack similar to C3 Systems's?

The companies with the stacks most like C3 Systems' are Jr Merit, Connelly Electric, Memrise and Cosm, according to runsonwhat (November 2026). Each shares 6 to 10 tools with C3 Systems, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what C3 Systems uses?

runsonwhat reads public records only. Of the 21 tools at C3 Systems, 15 were found through code on c3systems.es, 4 through DNS records and 2 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and c3systems.es about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/c3systems.es (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.