FusionAuth's tech stack
What does FusionAuth use?
FusionAuth (fusionauth.io) uses at least 46 tools we can see from public records, including Amazon Web Services for hosting, Microsoft 365 for email and documents, HubSpot for sales and Zendesk for customer support. Last checked .
“FusionAuth is a customer identity and access management platform built to deploy anywhere, giving teams full control over how identity is deployed, integrated, and scaled.”
- Based in
- Boulder, United States
- Company page
- Tools found
- 46
- Categories
- 18
- Oldest proven tool
- Jun 2025
- Last checked
- Oct 2026
FusionAuth'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
4 tools, where the bytes are served from
Hosting & Cloud
Application
4 tools, what the product is built with
Data & Observability
8 tools, what they measure and store
Go-to-market
13 tools, how they find and keep customers
Website & CMS
Ads & Pixels
Sales & CRM
Support & Docs
Company Ops
17 tools, what the team runs on day to day
Email Delivery
Dev Tools
What changed at FusionAuth
Using since
Dates come from the first certificate of the subdomain that points at the tool.
Companies like FusionAuth also use
Tools common among companies with a similar stack that we haven't found at FusionAuth.
Companies with a stack like FusionAuth's
Ranked by shared tools, with rare tools counting more.
SourcegraphIT Services17in common
KajabiAdvertising · 51–200 people24in common
Axiomaxiom.co13in common
ResendCommunication · 11–50 people11in common
MintlifyEngineering, Product and Design · 51–200 people16in common
E2BSoftware10in common
LaravelSoftware · 11–50 people13in common
InterfereEngineering, Product and Design · 1–10 people11in common
FusionAuth tech stack FAQ
What tools does FusionAuth use?
As of October 2026, runsonwhat has found 46 tools at FusionAuth (fusionauth.io) in public records. Edge & Hosting: Cloudflare, Amazon Web Services and Amazon Route 53. Application: jQuery, Anthropic and MCP Registry. Data & Observability: Google Analytics, Google Tag Manager and web-vitals. Go-to-market: Meta Pixel, Mailchimp and HubSpot. Company Ops: Microsoft 365, Google Workspace and SendGrid. Last checked October 18, 2026.
What cloud does FusionAuth run on?
FusionAuth 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 fusionauth.io. Amazon Web Services is used by 145,008 companies runsonwhat tracks.
What CRM does FusionAuth use?
FusionAuth uses HubSpot for its CRM, alongside Vector and Common Room, according to runsonwhat (October 2026). runsonwhat found HubSpot through a subdomain that points at HubSpot and code on fusionauth.io. HubSpot is used by 92,395 companies runsonwhat tracks.
What email provider does FusionAuth use?
FusionAuth uses Microsoft 365 for email and office software, alongside Google Workspace and Apple Business, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365. Microsoft 365 is used by 704,081 companies runsonwhat tracks.
What does FusionAuth use for customer support?
FusionAuth uses Zendesk for customer support and documentation, alongside Plain, according to runsonwhat (October 2026). runsonwhat found Zendesk through email records that authorize Zendesk. Zendesk is used by 41,083 companies runsonwhat tracks.
What analytics tools does FusionAuth use?
FusionAuth uses Google Analytics for analytics, alongside Google Tag Manager, PostHog and Dreamdata, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on fusionauth.io. Google Analytics is used by 856,440 companies runsonwhat tracks.
How long has FusionAuth used Atlassian Statuspage?
FusionAuth has used Atlassian Statuspage since at least June 2025, going by the first public certificate of the fusionauth.io subdomain that points at Atlassian Statuspage.
Does FusionAuth use jQuery?
Yes. runsonwhat found jQuery at FusionAuth through jQuery code on fusionauth.io. jQuery is a Frontend tool used by 899,913 companies runsonwhat tracks.
Does FusionAuth use AI tools?
Yes. runsonwhat has found Anthropic and MCP Registry at FusionAuth; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so FusionAuth may use more AI tools than these.
Which companies have a tech stack similar to FusionAuth's?
The companies with the stacks most like FusionAuth's are Sourcegraph, Kajabi, Axiom and Resend, according to runsonwhat (October 2026). Each shares 11 to 24 tools with FusionAuth, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.
How does runsonwhat know what FusionAuth uses?
runsonwhat reads public records only. Of the 46 tools at FusionAuth, 19 were found through code on fusionauth.io, 18 through DNS records, 4 through email records, 4 through subdomains that point at the vendor and 1 through website configuration files. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and fusionauth.io 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.