Screaming Frog SEO Spider vs Optimizely Experimentation

Screaming Frog SEO Spider8.9Visit Optimizely Experimentation8.8Visit

Higher score Screaming Frog SEO Spider #4 in Website Optimization Tools 8.9/10 Free plan Free plan✓ 1 of 3 features Visit Screaming Frog

vs

Optimizely Experimentation #5 in Website Optimization Tools 8.8/10 Free plan Free plan✓ 0 of 3 features Visit Optimizely

• Screaming Frog SEO Spider fits best

  Technical SEO crawling and detailed site audits

• Optimizely Experimentation fits best

  Teams optimizing pages through experimentation

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Side by side

Feature	Screaming Frog SEO Spider 8.9/10 Visit ↗	Optimizely Experimentation 8.8/10 Visit ↗
At a glance
Editor score	8.9	8.8
Ranking	#4 in Website Optimization Tools	#5 in Website Optimization Tools
Best for	Technical SEO crawling and detailed site audits	Teams optimizing pages through experimentation
Pricing model	Free plan + paid	Free plan + paid
Starting price	—	—
Free plan	✓	✓
Free trial	—	—
Deployment	Desktop	Cloud
Platforms	Windows, macOS, Linux	Web, iOS, Android
Support	Email, Tickets, Phone, Docs	Tickets, Community, Docs
Integrations	10 integrations	3 integrations
Built for	Solo, Small business, Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features Screaming Frog SEO Spider 1/3 · Optimizely Experimentation 0/3
Site audit	✓ (best)	Not checked yet
A/B testing	Not checked yet	Not checked yet
Page speed monitoring	Not checked yet	Not checked yet
Specs
Optimization focus	Not checked yet	Not checked yet
Tracked sites	Not checked yet	Not checked yet
Our review
Pros	Finds broken links, redirects, errors, and metadata issues Audits JavaScript-rendered pages, hreflang, and structured data Compares crawls and connects with analytics and backlink tools	Combines visual web tests with server-side experimentation. Supports feature flags, controlled rollouts, and audience targeting. SDKs cover web, iOS, Android, and APIs.
Cons	Free crawls are limited to 500 URLs JavaScript rendering and saved crawls require a paid licence Does not provide keyword or rank tracking	Paid plans are individually packaged, with no public prices. The free Rollouts plan focuses on flags, rollouts, and A/B testing. SEO research and audit coverage is limited.
Our verdict	Screaming Frog SEO Spider is a desktop crawler for technical SEO audits, suited to SEO professionals, agencies, and website owners who need to inspect site structure and page-level issues. It identifies broken links, errors, redirects,… Read the review →	Optimizely Experimentation brings web and feature experimentation together for marketing, product, and engineering teams. It is suited to organizations that want to test page variations as well as product behavior across websites, mobile… Read the review →

Strengths and trade-offs

• Screaming Frog SEO Spider — where it wins

  • Finds broken links, redirects, errors, and metadata issues
  • Audits JavaScript-rendered pages, hreflang, and structured data
  • Compares crawls and connects with analytics and backlink tools

  Where it doesn't

  • Free crawls are limited to 500 URLs
  • JavaScript rendering and saved crawls require a paid licence
  • Does not provide keyword or rank tracking

• Optimizely Experimentation — where it wins

  • Combines visual web tests with server-side experimentation.
  • Supports feature flags, controlled rollouts, and audience targeting.
  • SDKs cover web, iOS, Android, and APIs.

  Where it doesn't

  • Paid plans are individually packaged, with no public prices.
  • The free Rollouts plan focuses on flags, rollouts, and A/B testing.
  • SEO research and audit coverage is limited.

• Screaming Frog SEO Spider8.9/10 · Free plan

  A desktop crawler for detailed technical SEO audits, with a free 500-URL tier.

  Visit Screaming FrogFull verdict →
• Optimizely Experimentation8.8/10 · Free plan

  A broad experimentation toolkit for teams testing web and product experiences.

  Visit OptimizelyFull verdict →