FELS's tech stack
What does FELS use?
FELS (fels.finance) uses at least 5 tools we can see from public records, including Vercel for hosting, Microsoft 365 for email and documents, HubSpot for sales and Auth0 for sign-in. Last checked .
- Tools found
- 5
- Categories
- 4
- Layers
- 4 of 5
- Last checked
- Oct 2026
FELS's stack, layer by layer
Each tool links to the other companies we've found using it. The label says what kind of public trace gave it away.
Edge & Hosting
2 tools, where the bytes are served from
Hosting & Cloud
Application
1 tool, what the product is built with
Auth & Identity
Go-to-market
1 tool, how they find and keep customers
Sales & CRM
Company Ops
1 tool, what the team runs on day to day
Workspace
FELS tech stack 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 October 28, 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 50,961 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 96,192 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 719,244 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 5,970 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 719,244 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.
We read public traces only: DNS and email records, certificate logs, website code and published subprocessor lists. A tool is listed when a direct record backs it up, and dropped when a recheck no longer finds it. Is this your company? See how to opt out.