# What does E-System use?

E-System (esystem.us) shows public evidence of 7 tools, according to runsonwhat (last checked 2026-10-24).

- Industry: IT Services
- Size: 11–50 employees
- Based in: Butler, United States
- LinkedIn: https://www.linkedin.com/company/e-system-services

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Amazon Web Services](https://www.runsonwhat.com/reverse/aws) | Hosting & Cloud | Website code |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Squarespace](https://www.runsonwhat.com/reverse/squarespace) | Website & CMS | Custom domain, DNS records, Website code |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | Email records, DNS verification records, Website code |  |
| [SendGrid](https://www.runsonwhat.com/reverse/sendgrid) | Email Delivery | Email records |  |
| [Amazon SES](https://www.runsonwhat.com/reverse/ses) | Email Delivery | Email records, Website code |  |
| [Exclaimer](https://www.runsonwhat.com/reverse/exclaimer) | Workspace | Email records |  |
| [Tailscale](https://www.runsonwhat.com/reverse/tailscale) | Security & Compliance | DNS verification records |  |

## FAQ

### What tools does E-System use?

As of October 2026, runsonwhat has found 7 tools at E-System (esystem.us) in public records. Edge & Hosting: Amazon Web Services. Go-to-market: Squarespace. Company Ops: Microsoft 365, SendGrid and Amazon SES. Last checked October 24, 2026.

### What cloud does E-System run on?

E-System uses Amazon Web Services for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Amazon Web Services through Amazon Web Services code on esystem.us. Amazon Web Services is used by 146,186 companies runsonwhat tracks.

### What email provider does E-System use?

E-System uses Microsoft 365 for email and office software, alongside Exclaimer, 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 715,360 companies runsonwhat tracks.

### What is E-System's website built with?

E-System uses Squarespace for its website, according to runsonwhat (October 2026). runsonwhat found Squarespace through a subdomain that points at Squarespace and DNS records. Squarespace is used by 33,938 companies runsonwhat tracks.

### Does E-System use SendGrid?

Yes. runsonwhat found SendGrid at E-System through email records that authorize SendGrid. SendGrid is a Email Delivery tool used by 195,408 companies runsonwhat tracks.

### Which companies have a tech stack similar to E-System's?

The companies with the stacks most like E-System's are Moonflow, Adabai Innovation, Blueprint Apps and Encore Healthcare, according to runsonwhat (October 2026). Each shares 2 to 4 tools with E-System, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what E-System uses?

runsonwhat reads public records only. Of the 7 tools at E-System, 4 were found through email records, 1 through code on esystem.us, 1 through subdomains that point at the vendor and 1 through DNS records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and esystem.us about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/esystem.us (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.