# What does Jenner & Block use?

Jenner & Block (jenner.com) shows public evidence of 15 tools, according to runsonwhat (last checked 2026-10-20).

- Industry: Law Practice
- Size: 201–1,000 employees
- Based in: Chicago, United States
- Founded: 1914
- LinkedIn: https://www.linkedin.com/company/jenner-block

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | Custom domain, Website code |  |
| [Amazon Web Services](https://www.runsonwhat.com/reverse/aws) | Hosting & Cloud | Website code |  |
| [Amazon Route 53](https://www.runsonwhat.com/reverse/route53) | DNS | DNS records |  |

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Anthropic](https://www.runsonwhat.com/reverse/anthropic) | AI | DNS verification records |  |
| [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 |  |
| [Google Tag Manager](https://www.runsonwhat.com/reverse/gtm) | Analytics | Website code |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | DNS verification records, Email records |  |
| [OneTrust](https://www.runsonwhat.com/reverse/onetrust) | Security & Compliance | Website code |  |
| [Mimecast](https://www.runsonwhat.com/reverse/mimecast) | Security & Compliance | Email records |  |
| [Adobe](https://www.runsonwhat.com/reverse/adobe) | Collaboration | DNS verification records |  |
| [Webex](https://www.runsonwhat.com/reverse/webex) | Collaboration | DNS verification records |  |
| [Box](https://www.runsonwhat.com/reverse/box) | Collaboration | DNS verification records |  |
| [Pexip](https://www.runsonwhat.com/reverse/pexip) | Collaboration | DNS verification records |  |

## Recent changes at Jenner & Block

- 2026-10-20: started using [OpenAI](https://www.runsonwhat.com/reverse/openai)

## FAQ

### What tools does Jenner & Block use?

As of October 2026, runsonwhat has found 15 tools at Jenner & Block (jenner.com) in public records. Edge & Hosting: Cloudflare, Amazon Web Services and Amazon Route 53. Application: Anthropic and OpenAI. Data & Observability: Google Analytics and Google Tag Manager. Company Ops: Microsoft 365, OneTrust and Mimecast. Last checked October 20, 2026.

### What cloud does Jenner & Block run on?

Jenner & Block uses Amazon Web Services for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Amazon Web Services through Amazon Web Services code on jenner.com. Amazon Web Services is used by 145,100 companies runsonwhat tracks.

### What email provider does Jenner & Block use?

Jenner & Block uses Microsoft 365 for email and office software, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365 and email records. Microsoft 365 is used by 705,080 companies runsonwhat tracks.

### What analytics tools does Jenner & Block use?

Jenner & Block uses Google Analytics for analytics, alongside Google Tag Manager, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on jenner.com. Google Analytics is used by 859,348 companies runsonwhat tracks.

### Does Jenner & Block use Cloudflare?

Yes. runsonwhat found Cloudflare at Jenner & Block through a subdomain that points at Cloudflare and code on jenner.com. Cloudflare is a CDN & Edge tool used by 695,589 companies runsonwhat tracks.

### Does Jenner & Block use AI tools?

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

### Has Jenner & Block changed tools recently?

Yes. On runsonwhat's rechecks, Jenner & Block started using OpenAI (latest on October 20, 2026). A change counts only between two checks of jenner.com done the same way.

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

The companies with the stacks most like Jenner & Block's are Linklaters, Simpson Thacher & Bartlett LLP, Gide and Nichols Portland, according to runsonwhat (October 2026). Each shares 5 to 9 tools with Jenner & 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 Jenner & Block uses?

runsonwhat reads public records only. Of the 15 tools at Jenner & Block, 9 were found through DNS records, 4 through code on jenner.com, 1 through subdomains that point at the vendor and 1 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and jenner.com about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/jenner.com (updated October 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.