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Atoms vs WhatRuns

Complete site toolkit vs. lightweight tech identifier

Feature Comparison

FeatureAtomsWhatRuns
SEO Analysis✓✕
CSS Inspection✓✕
Tech Stack Detection✓✓
Core Web Vitals✓✕
AI Readiness Check✓✕
WCAG Contrast Checker✓✕
Color Extraction✓✕
Font Detection✓✓
SERP Overlay✓✕
Export (MD/CSV/JSON)✓✕
One-Time Pricing✓✓

Pricing Comparison

Atoms

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WhatRuns

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Key Differences

WhatRuns is a clean, minimalist extension that identifies the technologies, frameworks, themes, and plugins running on any website. It is well-liked for its simple interface: click the icon, see a categorized list of technologies. WhatRuns also detects fonts used on a page, which is a useful bonus that most tech detection tools do not offer. For a free, no-frills technology lookup, WhatRuns does exactly what it promises. The simplicity that makes WhatRuns appealing is also its limitation. Beyond technology and font detection, WhatRuns does not offer any analysis capabilities. It cannot audit SEO elements, inspect CSS properties beyond fonts, measure page performance, check accessibility compliance, or provide any actionable optimization recommendations. It is a lookup tool, not an analysis tool. Atoms includes technology detection for 35+ technologies and font detection, matching WhatRuns' core features, but wraps them in a comprehensive analysis framework. When you inspect a page with Atoms, you see not just what technologies and fonts it uses, but also its SEO structure (meta tags, headings, schema, links), its performance profile (LCP, CLS, INP, FCP, TTFB), its color palette with WCAG contrast ratings, its AI readiness score, and more. You can export all of this data in markdown, CSV, or JSON format. WhatRuns is a good choice if you want a free, lightweight tool strictly for identifying technologies and fonts on websites. Atoms is the choice for professionals who want that same information integrated with the SEO, performance, design, and accessibility data they need for their work. At $49 one-time, Atoms replaces WhatRuns plus multiple other extensions, reducing toolbar clutter while expanding analytical capability.

Frequently Asked Questions

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