# What does Block use?

Block (blockcrs.cz) shows public evidence of 13 tools, according to runsonwhat (last checked 2026-10-31).

- Industry: Construction
- Size: 201–1,000 employees
- Based in: Valašské Meziříčí, Czechia
- Founded: 1991
- LinkedIn: https://www.linkedin.com/company/763130

## 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 |  |
| [OpenAI](https://www.runsonwhat.com/reverse/openai) | AI | DNS verification records |  |

## Data & Observability

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

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Ads](https://www.runsonwhat.com/reverse/google-ads) | Ads & Pixels | Website code |  |
| [LiveRamp](https://www.runsonwhat.com/reverse/liveramp) | Ads & Pixels | Website code |  |
| [D&B Visitor Intelligence](https://www.runsonwhat.com/reverse/dnb-visitor-intelligence) | Sales & CRM | Website code |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | Email records, Website code |  |
| [Apple Business](https://www.runsonwhat.com/reverse/apple) | Workspace | DNS verification records |  |
| [Autodesk](https://www.runsonwhat.com/reverse/autodesk) | Collaboration | DNS verification records |  |

## Recent changes at Block

- 2026-10-22: started using [Font Awesome](https://www.runsonwhat.com/reverse/fontawesome)
- 2026-10-22: started using [Vimeo](https://www.runsonwhat.com/reverse/vimeo)

## FAQ

### What tools does Block use?

As of November 2026, runsonwhat has found 13 tools at Block (blockcrs.cz) in public records. Application: jQuery, Google Fonts and Font Awesome. Data & Observability: Google Analytics. Go-to-market: Google Ads, LiveRamp and D&B Visitor Intelligence. Company Ops: Microsoft 365, Apple Business and Autodesk. Last checked October 31, 2026.

### What sales tools does Block use?

The sales tools runsonwhat has found at Block are D&B Visitor Intelligence (November 2026); no CRM shows up in Block's public records. runsonwhat found D&B Visitor Intelligence through D&B Visitor Intelligence code on blockcrs.cz. D&B Visitor Intelligence is used by 367 companies runsonwhat tracks.

### What email provider does Block use?

Block uses Microsoft 365 for email and office software, alongside Apple Business, according to runsonwhat (November 2026). runsonwhat found Microsoft 365 through email records that authorize Microsoft 365 and code on blockcrs.cz. Microsoft 365 is used by 718,430 companies runsonwhat tracks.

### What analytics tools does Block use?

Block uses Google Analytics for analytics, according to runsonwhat (November 2026). runsonwhat found Google Analytics through Google Analytics code on blockcrs.cz. Google Analytics is used by 905,639 companies runsonwhat tracks.

### Does Block use jQuery?

Yes. runsonwhat found jQuery at Block through jQuery code on blockcrs.cz. jQuery is a Frontend tool used by 929,660 companies runsonwhat tracks.

### Does Block use AI tools?

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

### Has Block changed tools recently?

Yes. On runsonwhat's rechecks, Block started using Font Awesome and Vimeo (latest on October 22, 2026). A change counts only between two checks of blockcrs.cz done the same way.

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

The companies with the stacks most like Block's are Valicor Environmental Services, Information Technology Engineering, Symetri Addnode Group and McPherson Oil, according to runsonwhat (November 2026). Each shares 6 to 9 tools with Block, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what Block uses?

runsonwhat reads public records only. Of the 13 tools at Block, 9 were found through code on blockcrs.cz, 3 through DNS records and 1 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and blockcrs.cz about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/blockcrs.cz (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.