runsonwhat

SI's tech stack

What does SI use?

SI (si.com) uses at least 56 tools we can see from public records, including Amazon Web Services for hosting, Microsoft 365 for email and documents, Google Analytics for analytics and WordPress for its website. Last checked .

Industry
Publishing
Size
10,000+ employees
Based in
New York, United States
Founded
1954
LinkedIn
Company page
Re-check liveVisit si.com
Tools found
56
Categories
16
Layers
5 of 5
Last checked
Oct 2026

SI'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

DNS

Application

5 tools, what the product is built with

AI

Media & UI

Data & Observability

6 tools, what they measure and store

Analytics

Data Pipeline

Go-to-market

30 tools, how they find and keep customers

Website & CMS

Marketing

Ads & Pixels

Company Ops

11 tools, what the team runs on day to day

Email Delivery

Workspace

Collaboration

Dev Tools

Finance & Legal

Security & Compliance

Companies like SI also use

Tools common among companies with a similar stack that we haven't found at SI.

Companies with a stack like SI's

Ranked by shared tools, with rare tools counting more.

More Publishing companies

Other Publishing companies we've checked.

SI tech stack FAQ

What tools does SI use?

We've found 56 tools at SI (si.com). Edge & Hosting: Cloudflare, Amazon Web Services and Amazon Route 53. Application: Google Fonts, Adobe Fonts and Anthropic. Data & Observability: Google Analytics, Google Tag Manager and Microsoft Clarity. Go-to-market: WordPress, Meta Pixel and LinkedIn Insight Tag. Company Ops: Microsoft 365, Google Workspace and Apple Business. Last checked October 7, 2026.

What cloud does SI run on?

SI uses Amazon Web Services for hosting. We found Amazon Web Services through website code.

What email provider does SI use?

SI uses Microsoft 365, Google Workspace and Apple Business for email and documents. We found Microsoft 365 through DNS verification records.

What analytics tools does SI use?

SI uses Google Analytics, Google Tag Manager and Microsoft Clarity for analytics, among 5 tools in this category. We found Google Analytics through website code.

What CMS does SI use?

SI uses WordPress for its website. We found WordPress through website code.

What marketing software does SI use?

SI uses Piano, Cxense and Sailthru for marketing. We found Piano through website code.

Does SI use Microsoft 365?

Yes. We found Microsoft 365 at SI through DNS verification records. Microsoft 365 is used by 685,116 companies we track.

How does runsonwhat know what SI uses?

We read public traces only: SI's DNS and email records, certificate logs, the code its website loads, and published subprocessor lists. A tool is listed only when a direct record backs it up. DNS is rechecked weekly and the website 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.