Holbrook & Fessenden's tech stack
What does Holbrook & Fessenden use?
Holbrook & Fessenden (si.edu) uses at least 36 tools we can see from public records, including Amazon Web Services for hosting, Microsoft 365 for email and documents, Google Analytics for analytics and Mailchimp for marketing. Last checked .
- Industry
- Publishing
- Based in
- United States
- Tools found
- 36
- Categories
- 14
- Layers
- 5 of 5
- Last checked
- Oct 2026
Holbrook & Fessenden'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
CDN & Edge
Application
5 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
Company Ops
18 tools, what the team runs on day to day
Email Delivery
Workspace
Collaboration
Dev Tools
Finance & Legal
Holbrook & Fessenden tech stack FAQ
What tools does Holbrook & Fessenden use?
As of October 2026, runsonwhat has found 36 tools at Holbrook & Fessenden (si.edu) in public records. Edge & Hosting: Cloudflare, Amazon Web Services and Akamai. Application: jQuery, Google Fonts and GSAP. Data & Observability: Google Analytics, Google Tag Manager and Microsoft Clarity. Go-to-market: Google Ads, Meta Pixel and Microsoft Ads. Company Ops: Microsoft 365, reCAPTCHA and SendGrid. Last checked October 6, 2026.
What cloud does Holbrook & Fessenden run on?
Holbrook & Fessenden uses Amazon Web Services for hosting and cloud infrastructure, alongside GitHub Pages, according to runsonwhat (October 2026). runsonwhat found Amazon Web Services through a subdomain that points at Amazon Web Services. Amazon Web Services is used by 144,746 companies runsonwhat tracks.
What email provider does Holbrook & Fessenden use?
Holbrook & Fessenden uses Microsoft 365 for email and office software, alongside Apple Business, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through email records that authorize Microsoft 365 and a DNS verification record. Microsoft 365 is used by 700,621 companies runsonwhat tracks.
What analytics tools does Holbrook & Fessenden use?
Holbrook & Fessenden uses Google Analytics for analytics, alongside Google Tag Manager and Microsoft Clarity, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on si.edu. Google Analytics is used by 850,341 companies runsonwhat tracks.
What marketing software does Holbrook & Fessenden use?
Holbrook & Fessenden uses Mailchimp for marketing, alongside Pardot, according to runsonwhat (October 2026). runsonwhat found Mailchimp through email records that authorize Mailchimp. Mailchimp is used by 113,065 companies runsonwhat tracks.
Does Holbrook & Fessenden use jQuery?
Yes. runsonwhat found jQuery at Holbrook & Fessenden through jQuery code on si.edu. jQuery is a Frontend tool used by 895,838 companies runsonwhat tracks.
Does Holbrook & Fessenden use AI tools?
Yes. runsonwhat has found OpenAI at Holbrook & Fessenden; OpenAI, for example, through a DNS verification record for OpenAI. AI services called only from servers leave no public trace, so Holbrook & Fessenden may use more AI tools than these.
How does runsonwhat know what Holbrook & Fessenden uses?
runsonwhat reads public records only. Of the 36 tools at Holbrook & Fessenden, 18 were found through DNS records, 11 through code on si.edu, 4 through email records and 3 through subdomains that point at the vendor. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and si.edu 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.