WhatRuns — Developer Tools

Free

WhatRuns (Developer Tools): WhatRuns is a free browser extension that identifies technologies powering any website at the click of a button. Pricing: from Free. (data verified July 2026)

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About WhatRuns

What is WhatRuns?

WhatRuns is a free browser extension that reveals the technologies behind any website. With one click, it identifies CMS, frameworks, analytics tools, CDNs, WordPress plugins, fonts, and more — helping developers, marketers, and tech enthusiasts understand what makes a site work.

Who is it for?

WhatRuns is built for web developers, digital marketers, SEO specialists, and competitive researchers who need to quickly audit a website's tech stack. It's also valuable for product managers tracking competitor tools. It is not designed for non-technical users looking for a general website analysis tool.

Use cases in practice

Identify which CMS a competitor uses, discover the analytics provider on a lead's site, track when a website adds or removes a technology (with follow notifications), and stay updated on new web apps — the database grows by 50–100 new technologies daily. Over 450,000 active users rely on it for competitive intelligence and tech research.

Key features

One-click technology detection — Identify CMS, frameworks, CDNs, analytics, fonts, and more instantly.
Follow websites for change alerts — Get notified when a site starts or stops using a technology.
Extensive technology database — Covers thousands of web apps, updated daily with 50–100 new additions.
No sign-up required — Install the extension and start using it immediately.
Free to use — The extension is completely free with no paid plans required.
Over 450,000 active users — Trusted by a large community of tech researchers and professionals.

SaaSpartout Score

6.8 /10

Ease of use 8.5

Features depth 7.0

Value for money 9.5

Support quality 4.0

Integrations 5.0

Scalability 6.0

Documentation 5.5

Onboarding speed 9.0

Editorial score from our review methodology — not user ratings.

WhatRuns Pricing

WhatRuns pricing: Free. Billing model: Free.

Free Plan

WhatRuns is completely free to use. No sign-up or credit card required. Install the browser extension and start identifying website technologies immediately. There are no paid plans or additional fees.

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Frequently asked questions

Is WhatRuns free to use?

Yes, WhatRuns is completely free. No sign-up or payment is needed.

How does WhatRuns work?

Install the browser extension, click the WhatRuns button on any website, and it instantly displays all detected technologies, including CMS, frameworks, analytics tools, CDNs, and more.

What technologies can WhatRuns detect?

WhatRuns identifies CMS, frameworks, analytics tools, CDNs, WordPress plugins, fonts, and thousands of other web apps. Its database grows by 50–100 new technologies daily.

Who is WhatRuns best for?

It is best for web developers, digital marketers, SEO professionals, and competitive researchers who need to quickly audit tech stacks. It is not designed for general non-technical users.

Can I get notified when a website changes its technology stack?

Yes, you can follow any website, and WhatRuns will notify you when it adds or removes a technology.

Does WhatRuns require creating an account?

No, the extension works without any account or sign-up. Just install and use.

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