# What does Checksum use?

Checksum (checksum.com) shows public evidence of 9 tools, according to runsonwhat (last checked 2026-10-26).

- Industry: Electrical/electronic Manufacturing
- Size: 11–50 employees
- Based in: Arlington, United States
- Founded: 1987
- LinkedIn: https://www.linkedin.com/company/checksum-llc

## Edge & Hosting

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

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [jQuery](https://www.runsonwhat.com/reverse/jquery) | Frontend | Website code |  |
| [Google Fonts](https://www.runsonwhat.com/reverse/google-fonts) | Media & UI | Website code |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [HubSpot](https://www.runsonwhat.com/reverse/hubspot) | Sales & CRM | Email records, Website code |  |
| [HubSpot CMS](https://www.runsonwhat.com/reverse/hubspot-cms) | Website & CMS | Custom domain, Website code |  |

## Company Ops

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

## FAQ

### What tools does Checksum use?

As of November 2026, runsonwhat has found 9 tools at Checksum (checksum.com) in public records. Edge & Hosting: Cloudflare. Application: jQuery and Google Fonts. Go-to-market: HubSpot and HubSpot CMS. Company Ops: Microsoft 365, SendGrid and GlobalSign. Last checked October 26, 2026.

### What CRM does Checksum use?

Checksum uses HubSpot for its CRM, according to runsonwhat (November 2026). runsonwhat found HubSpot through email records that authorize HubSpot and code on checksum.com. HubSpot is used by 96,101 companies runsonwhat tracks.

### What email provider does Checksum use?

Checksum uses Microsoft 365 for email and office software, according to runsonwhat (November 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365 and email records. Microsoft 365 is used by 718,536 companies runsonwhat tracks.

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

Checksum uses HubSpot CMS for its website, according to runsonwhat (November 2026). runsonwhat found HubSpot CMS through a subdomain that points at HubSpot CMS and code on checksum.com. HubSpot CMS is used by 33,606 companies runsonwhat tracks.

### Does Checksum use jQuery?

Yes. runsonwhat found jQuery at Checksum through jQuery code on checksum.com. jQuery is a Frontend tool used by 930,453 companies runsonwhat tracks.

### How does runsonwhat know what Checksum uses?

runsonwhat reads public records only. Of the 9 tools at Checksum, 3 were found through code on checksum.com, 3 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 checksum.com about monthly.


---

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