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Willis Towers Watson's tech stack

What does Willis Towers Watson use?

Willis Towers Watson (wtwco.com) uses at least 28 tools we can see from public records, including Vercel for hosting, Microsoft 365 for email and documents, Sitecore for its website and Marketo for marketing. Last checked .

Industry
Consulting Company
Size
10,000+ employees
Based in
London, United Kingdom
Founded
2016
LinkedIn
Company page
Re-check liveVisit wtwco.com
Tools found
28
Categories
13
Layers
4 of 5
Last checked
Oct 2026

Willis Towers Watson'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

CDN & Edge

Application

3 tools, what the product is built with

Backend & Database

AI

Go-to-market

4 tools, how they find and keep customers

Website & CMS

Marketing

Ads & Pixels

Company Ops

19 tools, what the team runs on day to day

Email Delivery

Workspace

Collaboration

Dev Tools

Finance & Legal

Security & Compliance

Companies like Willis Towers Watson also use

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

Companies with a stack like Willis Towers Watson's

Ranked by shared tools, with rare tools counting more.

Willis Towers Watson tech stack FAQ

What tools does Willis Towers Watson use?

We've found 28 tools at Willis Towers Watson (wtwco.com). Edge & Hosting: Amazon CloudFront and Vercel. Application: Anthropic, OpenAI and MongoDB Atlas. Go-to-market: Meta Pixel, Marketo and Sitecore. Company Ops: Microsoft 365, SendGrid and Atlassian. Last checked October 2, 2026.

What cloud does Willis Towers Watson run on?

Willis Towers Watson uses Vercel for hosting. We found Vercel through custom domain, DNS verification records and website code.

What email provider does Willis Towers Watson use?

Willis Towers Watson uses Microsoft 365 for email and documents. We found Microsoft 365 through email records and DNS verification records.

What CMS does Willis Towers Watson use?

Willis Towers Watson uses Sitecore for its website. We found Sitecore through DNS verification records.

What marketing software does Willis Towers Watson use?

Willis Towers Watson uses Marketo for marketing. We found Marketo through custom domain.

Does Willis Towers Watson use Microsoft 365?

Yes. We found Microsoft 365 at Willis Towers Watson through email records and DNS verification records. Microsoft 365 is used by 245,233 companies we track.

How does runsonwhat know what Willis Towers Watson uses?

We read public traces only: Willis Towers Watson'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.