# What does FOURSOURCE use?

FOURSOURCE (foursource.com) shows public evidence of 11 tools, according to runsonwhat (last checked 2026-10-31).

- LinkedIn: https://www.linkedin.com/company/foursource

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Amazon Route 53](https://www.runsonwhat.com/reverse/route53) | DNS | DNS records |  |
| [Amazon CloudFront](https://www.runsonwhat.com/reverse/cloudfront) | CDN & Edge | Website code |  |

## Application

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

## Data & Observability

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Tag Manager](https://www.runsonwhat.com/reverse/gtm) | Analytics | Website code |  |
| [web-vitals](https://www.runsonwhat.com/reverse/web-vitals) | Monitoring | Website code |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Mailchimp](https://www.runsonwhat.com/reverse/mailchimp) | Marketing | Email records |  |
| [Calendly](https://www.runsonwhat.com/reverse/calendly) | Sales & CRM | Website code |  |
| [Leadinfo](https://www.runsonwhat.com/reverse/leadinfo) | Sales & CRM | Website code |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | Email records |  |
| [Mailchimp Transactional](https://www.runsonwhat.com/reverse/mandrill) | Email Delivery | Email records |  |

## FAQ

### What tools does FOURSOURCE use?

As of November 2026, runsonwhat has found 11 tools at FOURSOURCE (foursource.com) in public records. Edge & Hosting: Amazon Route 53 and Amazon CloudFront. Application: Gatsby. Data & Observability: Google Tag Manager and web-vitals. Go-to-market: Mailchimp, Calendly and Leadinfo. Company Ops: Microsoft 365 and Mailchimp Transactional. Last checked October 31, 2026.

### What sales tools does FOURSOURCE use?

The sales tools runsonwhat has found at FOURSOURCE are Calendly and Leadinfo (November 2026); no CRM shows up in FOURSOURCE's public records. runsonwhat found Calendly through Calendly code on foursource.com.

### What email provider does FOURSOURCE use?

FOURSOURCE uses Microsoft 365 for email and office software, according to runsonwhat (November 2026). runsonwhat found Microsoft 365 through email records that authorize Microsoft 365. Microsoft 365 is used by 722,463 companies runsonwhat tracks.

### What analytics tools does FOURSOURCE use?

FOURSOURCE uses Google Tag Manager for analytics, according to runsonwhat (November 2026). runsonwhat found Google Tag Manager through Google Tag Manager code on foursource.com. Google Tag Manager is used by 515,647 companies runsonwhat tracks.

### What marketing software does FOURSOURCE use?

FOURSOURCE uses Mailchimp for marketing, according to runsonwhat (November 2026). runsonwhat found Mailchimp through email records that authorize Mailchimp. Mailchimp is used by 117,960 companies runsonwhat tracks.

### What monitoring tools does FOURSOURCE use?

FOURSOURCE uses web-vitals for monitoring, according to runsonwhat (November 2026). runsonwhat found web-vitals through web-vitals code on foursource.com. web-vitals is used by 30,124 companies runsonwhat tracks.

### Does FOURSOURCE use Amazon Route 53?

Yes. runsonwhat found Amazon Route 53 at FOURSOURCE through DNS records that point at Amazon Route 53. Amazon Route 53 is a DNS tool used by 87,621 companies runsonwhat tracks.

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

The companies with the stacks most like FOURSOURCE's are First Fence, Sages, Bold and Ackee s.r.o., according to runsonwhat (November 2026). Each shares 4 to 6 tools with FOURSOURCE, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what FOURSOURCE uses?

runsonwhat reads public records only. Of the 11 tools at FOURSOURCE, 6 were found through code on foursource.com, 3 through email records and 2 through DNS records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and foursource.com about monthly.


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