# What does OpenSSL use?

OpenSSL (openssl.org) shows public evidence of 16 tools, according to runsonwhat (last checked 2026-10-09).

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Amazon Web Services](https://www.runsonwhat.com/reverse/aws) | Hosting & Cloud | Website code |  |
| [Google Cloud](https://www.runsonwhat.com/reverse/gcp) | Hosting & Cloud | DNS records, Custom domain, Website code |  |
| [GitHub Pages](https://www.runsonwhat.com/reverse/github-pages) | Hosting & Cloud | Custom domain |  |

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Font Awesome](https://www.runsonwhat.com/reverse/fontawesome) | Media & UI | Website code |  |
| [Tailwind CSS](https://www.runsonwhat.com/reverse/tailwind) | Frontend | Website code |  |
| [Anthropic](https://www.runsonwhat.com/reverse/anthropic) | AI | DNS verification records |  |
| [OpenAI](https://www.runsonwhat.com/reverse/openai) | AI | DNS verification records |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Zendesk](https://www.runsonwhat.com/reverse/zendesk) | Support & Docs | Custom domain, Email records, Website code |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | DNS verification records |  |
| [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | Email records, Website code |  |
| [Amazon SES](https://www.runsonwhat.com/reverse/ses) | Email Delivery | Email records, Website code |  |
| [Let's Encrypt](https://www.runsonwhat.com/reverse/letsencrypt) | Security & Compliance | DNS records |  |
| [Mailgun](https://www.runsonwhat.com/reverse/mailgun) | Email Delivery | Custom domain, Email records, Website code |  |
| [Bitwarden](https://www.runsonwhat.com/reverse/bitwarden) | Security & Compliance | DNS verification records |  |
| [Red Sift OnDMARC](https://www.runsonwhat.com/reverse/redsift) | Security & Compliance | Email records |  |

## Recent changes at OpenSSL

- 2026-10-09: started using [Bitwarden](https://www.runsonwhat.com/reverse/bitwarden)
- 2026-10-09: stopped using [Google Trust Services](https://www.runsonwhat.com/reverse/google-trust)

## FAQ

### What tools does OpenSSL use?

As of October 2026, runsonwhat has found 16 tools at OpenSSL (openssl.org) in public records. Edge & Hosting: Amazon Web Services, Google Cloud and GitHub Pages. Application: Font Awesome, Tailwind CSS and Anthropic. Go-to-market: Zendesk. Company Ops: Microsoft 365, Google Workspace and Amazon SES. Last checked October 9, 2026.

### What cloud does OpenSSL run on?

OpenSSL uses Amazon Web Services for hosting and cloud infrastructure, alongside Google Cloud and GitHub Pages, according to runsonwhat (October 2026). runsonwhat found Amazon Web Services through Amazon Web Services code on openssl.org. Amazon Web Services is used by 144,750 companies runsonwhat tracks.

### What email provider does OpenSSL use?

OpenSSL uses Microsoft 365 for email and office software, alongside Google Workspace, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365. Microsoft 365 is used by 700,596 companies runsonwhat tracks.

### What does OpenSSL use for customer support?

OpenSSL uses Zendesk for customer support and documentation, according to runsonwhat (October 2026). runsonwhat found Zendesk through a subdomain that points at Zendesk and email records. Zendesk is used by 40,836 companies runsonwhat tracks.

### Does OpenSSL use Font Awesome?

Yes. runsonwhat found Font Awesome at OpenSSL through Font Awesome code on openssl.org. Font Awesome is a Media & UI tool used by 393,164 companies runsonwhat tracks.

### Does OpenSSL use AI tools?

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

### Has OpenSSL changed tools recently?

Yes. On runsonwhat's rechecks, OpenSSL started using Bitwarden (latest on October 9, 2026) and stopped using Google Trust Services (latest on October 9, 2026). A change counts only between two checks of openssl.org done the same way.

### How does runsonwhat know what OpenSSL uses?

runsonwhat reads public records only. Of the 16 tools at OpenSSL, 7 were found through DNS records, 3 through email records, 3 through code on openssl.org and 3 through subdomains that point at the vendor. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and openssl.org about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/openssl.org (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.