runsonwhat

Which?'s tech stack

What does Which? use?

Which? (which.co.uk) uses at least 21 tools we can see from public records, including Amazon Web Services for hosting, Google Workspace for email and documents, Salesforce for sales and Google Analytics for analytics. Last checked .

Based in
United Kingdom
Re-check liveVisit which.co.uk
Tools found
21
Categories
13
Layers
5 of 5
Changes seen
10

Which?'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

Hosting & Cloud

CDN & Edge

DNS

Application

2 tools, what the product is built with

Payments & Billing

Media & UI

Data & Observability

6 tools, what they measure and store

Monitoring

Analytics

Flags & Experiments

Go-to-market

5 tools, how they find and keep customers

Ads & Pixels

Sales & CRM

Company Ops

5 tools, what the team runs on day to day

Email Delivery

Workspace

Security & Compliance

What changed at Which?

Recent starts and stops

  1. Stopped1Password
  2. StoppedApple Business
  3. StoppedAtlassian
  4. StoppedGoogle Search Console
  5. StoppedIBM Cloud
  6. StoppedMicrosoft 365
  7. StoppedMiro
  8. StoppedProdPad
  9. StoppedSalesforce Marketing Cloud
  10. StoppedYandex Webmaster

Companies like Which? also use

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

Companies with a stack like Which?'s

Ranked by shared tools, with rare tools counting more.

Which? tech stack FAQ

What tools does Which? use?

As of November 2026, runsonwhat has found 21 tools at Which? (which.co.uk) in public records. Edge & Hosting: Amazon Web Services, Amazon Route 53 and Amazon CloudFront. Application: Stripe and Motion. Data & Observability: Google Analytics, Google Tag Manager and web-vitals. Go-to-market: Google Ads, Meta Pixel and Salesforce. Company Ops: Google Workspace, SendGrid and Amazon SES. Last checked October 31, 2026.

What cloud does Which? run on?

Which? uses Amazon Web Services for hosting and cloud infrastructure, according to runsonwhat (November 2026). runsonwhat found Amazon Web Services through Amazon Web Services code on which.co.uk. Amazon Web Services is used by 146,612 companies runsonwhat tracks.

What CRM does Which? use?

Which? uses Salesforce for its CRM, alongside Apollo.io, according to runsonwhat (November 2026). runsonwhat found Salesforce through email records that authorize Salesforce and code on which.co.uk. Salesforce is used by 34,461 companies runsonwhat tracks.

What email provider does Which? use?

Which? uses Google Workspace for email and office software, according to runsonwhat (November 2026). runsonwhat found Google Workspace through email records that authorize Google Workspace. Google Workspace is used by 410,457 companies runsonwhat tracks.

What payment provider does Which? use?

Which? uses Stripe for payments and billing, according to runsonwhat (November 2026). runsonwhat found Stripe through a DNS verification record for Stripe and code on which.co.uk. Stripe is used by 30,901 companies runsonwhat tracks.

What analytics tools does Which? use?

Which? uses Google Analytics for analytics, alongside Google Tag Manager, Segment and AppsFlyer, according to runsonwhat (November 2026). runsonwhat found Google Analytics through Google Analytics code on which.co.uk. Google Analytics is used by 906,764 companies runsonwhat tracks.

Does Which? use Google Ads?

Yes. runsonwhat found Google Ads at Which? through Google Ads code on which.co.uk. Google Ads is a Ads & Pixels tool used by 542,690 companies runsonwhat tracks.

Has Which? changed tools recently?

Yes. On runsonwhat's rechecks, Which? stopped using 1Password, Apple Business and Atlassian (latest on October 31, 2026). A change counts only between two checks of which.co.uk done the same way.

Which companies have a tech stack similar to Which?'s?

The companies with the stacks most like Which?'s are Kandji, Stadtwerke Kiel, Holley Performance Products and NordLayer, according to runsonwhat (November 2026). Each shares 9 to 18 tools with Which?, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

How does runsonwhat know what Which? uses?

runsonwhat reads public records only. Of the 21 tools at Which?, 10 were found through code on which.co.uk, 5 through DNS records, 5 through email records and 1 through subdomains that point at the vendor. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and which.co.uk 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.