SEi Security's tech stack
What does SEi Security use?
SEi Security (seisecurity.com) uses at least 21 tools we can see from public records, including Fly.io for hosting, Microsoft 365 for email and documents, Calendly for sales and Google Analytics for analytics. Last checked .
- Industry
- Security and Investigations
- Size
- 51–200 employees
- Based in
- Omaha, United States
- Founded
- 1969
- Company page
- Tools found
- 21
- Categories
- 14
- Layers
- 5 of 5
- Changes seen
- 1
SEi Security'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
3 tools, where the bytes are served from
Application
3 tools, what the product is built with
Data & Observability
3 tools, what they measure and store
Go-to-market
6 tools, how they find and keep customers
Website & CMS
Ads & Pixels
Sales & CRM
Company Ops
6 tools, what the team runs on day to day
Email Delivery
Workspace
Security & Compliance
What changed at SEi Security
Recent starts and stops
- StartedSMTP2GO
SEi Security tech stack FAQ
What tools does SEi Security use?
As of November 2026, runsonwhat has found 21 tools at SEi Security (seisecurity.com) in public records. Edge & Hosting: GoDaddy, Fastly and Fly.io. Application: jQuery, Google Maps and Stripe. Data & Observability: Google Analytics, Google Tag Manager and Microsoft Clarity. Go-to-market: WordPress, Google Ads and Yoast SEO. Company Ops: Microsoft 365, reCAPTCHA and Apple Business. Last checked October 28, 2026.
What cloud does SEi Security run on?
SEi Security uses Fly.io for hosting and cloud infrastructure, according to runsonwhat (November 2026). runsonwhat found Fly.io through Fly.io code on seisecurity.com. Fly.io is used by 5,469 companies runsonwhat tracks.
What sales tools does SEi Security use?
The sales tools runsonwhat has found at SEi Security are Calendly (November 2026); no CRM shows up in SEi Security's public records. runsonwhat found Calendly through Calendly code on seisecurity.com. Calendly is used by 31,437 companies runsonwhat tracks.
What email provider does SEi Security use?
SEi Security uses Microsoft 365 for email and office software, alongside Apple Business, 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 719,688 companies runsonwhat tracks.
What payment provider does SEi Security use?
SEi Security uses Stripe for payments and billing, according to runsonwhat (November 2026). runsonwhat found Stripe through Stripe code on seisecurity.com. Stripe is used by 30,933 companies runsonwhat tracks.
What analytics tools does SEi Security use?
SEi Security uses Google Analytics for analytics, alongside Google Tag Manager and Microsoft Clarity, according to runsonwhat (November 2026). runsonwhat found Google Analytics through Google Analytics code on seisecurity.com. Google Analytics is used by 906,257 companies runsonwhat tracks.
Does SEi Security use jQuery?
Yes. runsonwhat found jQuery at SEi Security through jQuery code on seisecurity.com. jQuery is a Frontend tool used by 930,112 companies runsonwhat tracks.
Has SEi Security changed tools recently?
Yes. On runsonwhat's rechecks, SEi Security started using SMTP2GO (latest on October 20, 2026). A change counts only between two checks of seisecurity.com done the same way.
How does runsonwhat know what SEi Security uses?
runsonwhat reads public records only. Of the 21 tools at SEi Security, 14 were found through code on seisecurity.com, 5 through DNS records and 2 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and seisecurity.com 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.