# What does FELS use?

FELS (fels.finance) shows public evidence of 5 tools, according to runsonwhat (last checked 2026-11-11).

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Vercel](https://www.runsonwhat.com/reverse/vercel) | Hosting & Cloud | Custom domain, DNS records, Website code |  |
| [Microsoft Azure](https://www.runsonwhat.com/reverse/azure) | Hosting & Cloud | Custom domain, DNS records |  |

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Auth0](https://www.runsonwhat.com/reverse/auth0) | Auth & Identity | Custom domain, Website config |  |

## Go-to-market

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

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | DNS verification records, Email records |  |

## FAQ

### What tools does FELS use?

As of November 2026, runsonwhat has found 5 tools at FELS (fels.finance) in public records. Edge & Hosting: Vercel and Microsoft Azure. Application: Auth0. Go-to-market: HubSpot. Company Ops: Microsoft 365. Last checked November 11, 2026.

### What cloud does FELS run on?

FELS uses Vercel for hosting and cloud infrastructure, alongside Microsoft Azure, according to runsonwhat (November 2026). runsonwhat found Vercel through a subdomain that points at Vercel and DNS records. Vercel is used by 53,191 companies runsonwhat tracks.

### What CRM does FELS use?

FELS uses HubSpot for its CRM, according to runsonwhat (November 2026). runsonwhat found HubSpot through email records that authorize HubSpot and code on fels.finance. HubSpot is used by 97,635 companies runsonwhat tracks.

### What email provider does FELS use?

FELS 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 734,175 companies runsonwhat tracks.

### What does FELS use for login and identity?

FELS uses Auth0 for sign-in and identity, according to runsonwhat (November 2026). runsonwhat found Auth0 through a subdomain that points at Auth0 and configuration files. Auth0 is used by 6,130 companies runsonwhat tracks.

### Does FELS use Microsoft 365?

Yes. runsonwhat found Microsoft 365 at FELS through a DNS verification record for Microsoft 365 and email records. Microsoft 365 is a Workspace tool used by 734,175 companies runsonwhat tracks.

### How does runsonwhat know what FELS uses?

runsonwhat reads public records only. Of the 5 tools at FELS, 3 were found through subdomains that point at the vendor, 1 through DNS records and 1 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and fels.finance about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/fels.finance (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.