WhatRuns
WhatRuns is a free browser extension that shows the technologies behind any website you visit, for sales reps, marketers and developers who want a quick read on a site's stack.
Updated October 2026
Overview: What is WhatRuns?
It's free with no sign-up, and there's no paid plan listed on whatruns.com (checked October 2026).
Click the icon on a page and it lists the CMS, frameworks, analytics and tracking tools, ad networks, CDN, fonts, and WordPress plugins and themes it recognizes. You can also follow a site and get notified when it starts or stops using a technology. For a rep it's a pre-call check on one account at a time, not a way to build lists.
Fit: Ideal customer profile.
SDRs, AEs and marketers who want to see a prospect's stack while they're on the prospect's site, at no cost. Teams that need technographic lists, bulk lookups or data written to a CRM need a paid tool such as BuiltWith, Wappalyzer or PublicWWW instead.
- Pre-call research
- Spot checks on one site
Capabilities
Key features.
01
One-click detection of CMS, frameworks, analytics, ad networks and CDN
02
WordPress plugin, theme and font detection
03
Follow a website and get notified when its technologies change
04
Works without an account
05
Chrome extension, with a Firefox version on addons.mozilla.org
06
Technology pages on whatruns.com listing sites that use a given tool
Usage
How to use WhatRuns.
Install the extension from the Chrome Web Store or Firefox Add-ons, open a prospect's site and click the WhatRuns icon. Note anything that matters to your pitch, such as a competitor's tag or a CMS your offer depends on, in the CRM by hand. There's no CRM integration or public API listed, so it stays a manual research step.
Cost
Pricing.
Free
WhatRuns is free and lists no paid plans (checked October 2026). The Chrome Web Store shows about 400,000 users and a 4.3 rating from 850 reviews, with version 1.10.0 updated April 26, 2026.
Free
$0.00
- Browser extension
- Technology detection
- Website follow alerts
- No account needed
At a glance
Quick facts.
- Stack position
- Enrichment
- Best for
- Pre-call research, Spot checks on one site
- Pricing
- Free
Questions
Frequently asked.
Is WhatRuns free?
Yes. The extension is free and works without signing up. No paid plan is listed on whatruns.com (checked October 2026).
Is WhatRuns safe to use?
Its Chrome Web Store listing says it handles website content and that the data isn't sold to third parties outside approved uses. The developer is Ownedit Ltd in Birmingham, UK. As with any extension that reads pages, check it against your company's browser policy.
Does WhatRuns work on Firefox?
Yes. There's a Firefox version on addons.mozilla.org as well as the Chrome extension.
What's the difference between WhatRuns and Wappalyzer?
Both show a site's technologies from the browser. Wappalyzer also sells technographic lead lists, bulk lookups and an API on paid plans, while WhatRuns stays a free single-site tool with change alerts.
What are the alternatives to WhatRuns?
Wappalyzer and BuiltWith add paid lists and APIs, WhatCMS checks pages by URL or in batches, and PublicWWW finds every indexed site that carries a given piece of code.
Compare
WhatRuns alternatives.
Talk to us: Pick the tool. We run the system around it.
WhatRuns is one part of a stack. We build and run the revenue system it plugs into.
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