# What does Defsys use?

Defsys (defsys.com.au) shows public evidence of 11 tools, according to runsonwhat (last checked 2026-10-29).

- Industry: Internet
- Size: 11–50 employees
- Based in: Campbelltown, Australia
- Founded: 2009
- LinkedIn: https://www.linkedin.com/company/defsys-group

## Edge & Hosting

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

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [jQuery](https://www.runsonwhat.com/reverse/jquery) | Frontend | Website code |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [WordPress](https://www.runsonwhat.com/reverse/wordpress) | Website & CMS | Website code |  |
| [Yoast SEO](https://www.runsonwhat.com/reverse/yoast) | Website & CMS | Website code |  |
| [Brevo](https://www.runsonwhat.com/reverse/brevo) | Marketing | DNS verification records, Email records |  |
| [Autotask PSA](https://www.runsonwhat.com/reverse/autotask) | Support & Docs | Email records |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | DNS verification records, Email records |  |
| [reCAPTCHA](https://www.runsonwhat.com/reverse/recaptcha) | Security & Compliance | Website code |  |
| [Apple Business](https://www.runsonwhat.com/reverse/apple) | Workspace | DNS verification records |  |
| [Mailgun](https://www.runsonwhat.com/reverse/mailgun) | Email Delivery | Email records |  |

## FAQ

### What tools does Defsys use?

As of October 2026, runsonwhat has found 11 tools at Defsys (defsys.com.au) in public records. Edge & Hosting: Cloudflare. Application: jQuery. Go-to-market: WordPress, Yoast SEO and Brevo. Company Ops: Microsoft 365, reCAPTCHA and Apple Business. Last checked October 29, 2026.

### What email provider does Defsys use?

Defsys uses Microsoft 365 for email and office software, alongside Apple Business, 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 715,482 companies runsonwhat tracks.

### What does Defsys use for customer support?

Defsys uses Autotask PSA for customer support and documentation, according to runsonwhat (October 2026). runsonwhat found Autotask PSA through email records that authorize Autotask PSA. Autotask PSA is used by 2,585 companies runsonwhat tracks.

### What is Defsys's website built with?

Defsys uses WordPress for its website, alongside Yoast SEO, according to runsonwhat (October 2026). runsonwhat found WordPress through WordPress code on defsys.com.au. WordPress is used by 602,351 companies runsonwhat tracks.

### What marketing software does Defsys use?

Defsys uses Brevo for marketing, according to runsonwhat (October 2026). runsonwhat found Brevo through a DNS verification record for Brevo and email records. Brevo is used by 80,983 companies runsonwhat tracks.

### Does Defsys use jQuery?

Yes. runsonwhat found jQuery at Defsys through jQuery code on defsys.com.au. jQuery is a Frontend tool used by 923,684 companies runsonwhat tracks.

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

The companies with the stacks most like Defsys' are Next Connex Is Now Wifinity, Technology Resource Advisors, Constant IT and MILNSBRIDGE IT VOICE & DATA, according to runsonwhat (October 2026). Each shares 4 to 8 tools with Defsys, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what Defsys uses?

runsonwhat reads public records only. Of the 11 tools at Defsys, 5 were found through DNS records, 4 through code on defsys.com.au and 2 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and defsys.com.au about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/defsys.com.au (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.