# What does Core Twelve use?

Core Twelve (core12.com) shows public evidence of 12 tools, according to runsonwhat (last checked 2026-11-05).

- Industry: Marketing and Advertising
- Size: 11–50 employees
- Based in: Chicago, United States
- Founded: 1998
- LinkedIn: https://www.linkedin.com/company/core-twelve

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | DNS records, Email records |  |
| [Vercel](https://www.runsonwhat.com/reverse/vercel) | Hosting & Cloud | DNS verification records |  |
| [Microsoft Azure](https://www.runsonwhat.com/reverse/azure) | Hosting & Cloud | Custom domain |  |

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Cloudinary](https://www.runsonwhat.com/reverse/cloudinary) | Media & UI | Website code |  |

## 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 |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Ads](https://www.runsonwhat.com/reverse/google-ads) | Ads & Pixels | Website code |  |
| [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 | Email records |  |
| [Apple Business](https://www.runsonwhat.com/reverse/apple) | Workspace | DNS verification records |  |
| [Elastic Email](https://www.runsonwhat.com/reverse/elasticemail) | Email Delivery | Email records |  |
| [Bitwarden](https://www.runsonwhat.com/reverse/bitwarden) | Security & Compliance | DNS verification records |  |

## Recent changes at Core Twelve

- 2026-11-05: started using [Bitwarden](https://www.runsonwhat.com/reverse/bitwarden)

## FAQ

### What tools does Core Twelve use?

As of November 2026, runsonwhat has found 12 tools at Core Twelve (core12.com) in public records. Edge & Hosting: Cloudflare, Vercel and Microsoft Azure. Application: Cloudinary. Data & Observability: Google Analytics and Google Tag Manager. Go-to-market: Google Ads and Mailchimp. Company Ops: Microsoft 365, Apple Business and Elastic Email. Last checked November 5, 2026.

### What cloud does Core Twelve run on?

Core Twelve uses Vercel for hosting and cloud infrastructure, alongside Microsoft Azure, according to runsonwhat (November 2026). runsonwhat found Vercel through a DNS verification record for Vercel. Vercel is used by 51,956 companies runsonwhat tracks.

### What email provider does Core Twelve use?

Core Twelve 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. Microsoft 365 is used by 724,491 companies runsonwhat tracks.

### What analytics tools does Core Twelve use?

Core Twelve uses Google Analytics for analytics, alongside Google Tag Manager, according to runsonwhat (November 2026). runsonwhat found Google Analytics through Google Analytics code on core12.com. Google Analytics is used by 906,141 companies runsonwhat tracks.

### What marketing software does Core Twelve use?

Core Twelve uses Mailchimp for marketing, according to runsonwhat (November 2026). runsonwhat found Mailchimp through email records that authorize Mailchimp. Mailchimp is used by 118,091 companies runsonwhat tracks.

### Does Core Twelve use Cloudflare?

Yes. runsonwhat found Cloudflare at Core Twelve through DNS records that point at Cloudflare and email records. Cloudflare is a CDN & Edge tool used by 727,930 companies runsonwhat tracks.

### Has Core Twelve changed tools recently?

Yes. On runsonwhat's rechecks, Core Twelve started using Bitwarden (latest on November 5, 2026). A change counts only between two checks of core12.com done the same way.

### How does runsonwhat know what Core Twelve uses?

runsonwhat reads public records only. Of the 12 tools at Core Twelve, 4 were found through code on core12.com, 4 through DNS records, 3 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 core12.com about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/core12.com (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.