# What does Castle Learning use?

Castle Learning (castlelearning.com) shows public evidence of 8 tools, according to runsonwhat (last checked 2026-10-20).

- Industry: E-learning
- Size: 11–50 employees
- Based in: Rochester, United States
- Founded: 1991
- LinkedIn: https://www.linkedin.com/company/castle-software-inc-castle-learning-

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | DNS records, Website code |  |

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Anthropic](https://www.runsonwhat.com/reverse/anthropic) | AI | DNS verification records |  |

## Data & Observability

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Atlassian Statuspage](https://www.runsonwhat.com/reverse/statuspage) | Monitoring | Custom domain, DNS verification records |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [HubSpot](https://www.runsonwhat.com/reverse/hubspot) | Sales & CRM | Email records |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | Email records, DNS verification records |  |
| [GlobalSign](https://www.runsonwhat.com/reverse/globalsign) | Security & Compliance | DNS verification records |  |
| [Dropbox](https://www.runsonwhat.com/reverse/dropbox) | Collaboration | DNS verification records |  |

## FAQ

### What tools does Castle Learning use?

As of October 2026, runsonwhat has found 8 tools at Castle Learning (castlelearning.com) in public records. Edge & Hosting: Cloudflare. Application: Anthropic. Data & Observability: Atlassian Statuspage. Go-to-market: HubSpot. Company Ops: Microsoft 365, GlobalSign and Dropbox. Last checked October 20, 2026.

### What CRM does Castle Learning use?

Castle Learning uses HubSpot for its CRM, according to runsonwhat (October 2026). runsonwhat found HubSpot through email records that authorize HubSpot. HubSpot is used by 94,971 companies runsonwhat tracks.

### What email provider does Castle Learning use?

Castle Learning uses Microsoft 365 for email and office software, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through email records that authorize Microsoft 365 and a DNS verification record. Microsoft 365 is used by 715,776 companies runsonwhat tracks.

### What monitoring tools does Castle Learning use?

Castle Learning uses Atlassian Statuspage for monitoring, according to runsonwhat (October 2026). runsonwhat found Atlassian Statuspage through a subdomain that points at Atlassian Statuspage and a DNS verification record. Atlassian Statuspage is used by 6,693 companies runsonwhat tracks.

### Does Castle Learning use Cloudflare?

Yes. runsonwhat found Cloudflare at Castle Learning through DNS records that point at Cloudflare and code on castlelearning.com. Cloudflare is a CDN & Edge tool used by 709,728 companies runsonwhat tracks.

### Does Castle Learning use AI tools?

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

### How does runsonwhat know what Castle Learning uses?

runsonwhat reads public records only. Of the 8 tools at Castle Learning, 5 were found through DNS records, 2 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 castlelearning.com about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/castlelearning.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.