Sitebulb vs Crab

Sitebulb8.3Visit Crab7.9Visit

Higher score Sitebulb #2 in SEO Crawler Software 8.3/10 14-day trial Free trial✓ 0 of 6 features Visit Sitebulb

vs

Crab #5 in SEO Crawler Software 7.9/10 Free plan Free plan✓ 0 of 6 features Visit Crab

• Sitebulb fits best

  Teams wanting visual SEO audit explanations

• Crab fits best

  Free users auditing JavaScript-heavy sites

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature	Sitebulb 8.3/10 Visit ↗	Crab 7.9/10 Visit ↗
At a glance
Editor score	8.3	7.9
Ranking	#2 in SEO Crawler Software	#5 in SEO Crawler Software
Best for	Teams wanting visual SEO audit explanations	Free users auditing JavaScript-heavy sites
Pricing model	Paid	Free
Starting price	—	Free plan
Free plan	—	✓ (best)
Free trial	14 days	—
Deployment	Cloud, Desktop, Browser extension	Desktop
Platforms	Web, Windows, macOS	Windows, macOS, Linux
Support	Email, Live chat, Docs	Community
Built for	Solo, Small business, Mid-market, Enterprise	Solo, Small business
Features Sitebulb 0/6 · Crab 0/6
JavaScript rendering	Not checked yet	Not checked yet
Scheduled crawls	Not checked yet	Not checked yet
Log-file analysis	Not checked yet	Not checked yet
Mobile crawling	Not checked yet	Not checked yet
Custom data extraction	Not checked yet	Not checked yet
API access	—	Not checked yet
Specs
Crawl limit	Not checked yet	Not checked yet
Our review
Pros	JavaScript crawling with prioritized hints and explanations Visual crawl maps, comparisons, scheduled audits, and PDF reports Integrations with Analytics, Search Console, Sheets, and Data Studio	Free crawling with no URL limits or subscriptions JavaScript rendering, hreflang, structured-data, and accessibility checks Recurring crawls, sitemap generation, and hierarchy visualization
Cons	No free plan; access starts with a paid product and 14-day trial No backlink analysis or competitor research capabilities Sitebulb Cloud does not yet have an API	Desktop-local workflow may not suit browser-based collaboration Focused on technical audits rather than a complete SEO suite Keyword research, rank tracking, and backlink analysis are outside its stated focus
Our verdict	Sitebulb is technical SEO auditing and website-crawling software for SEO professionals, consultants, agencies, website owners, and enterprise teams. It combines desktop applications for Windows and macOS with a browser-accessible cloud… Read the review →	Crab is a free desktop SEO crawler for technical site audits on Windows, macOS, and Linux. It crawls websites locally and is aimed at SEO professionals, students, solo founders, and others who need occasional or private audits. Its… Read the review →

Strengths and trade-offs

• Sitebulb — where it wins

  • JavaScript crawling with prioritized hints and explanations
  • Visual crawl maps, comparisons, scheduled audits, and PDF reports
  • Integrations with Analytics, Search Console, Sheets, and Data Studio

  Where it doesn't

  • No free plan; access starts with a paid product and 14-day trial
  • No backlink analysis or competitor research capabilities
  • Sitebulb Cloud does not yet have an API

• Crab — where it wins

  • Free crawling with no URL limits or subscriptions
  • JavaScript rendering, hreflang, structured-data, and accessibility checks
  • Recurring crawls, sitemap generation, and hierarchy visualization

  Where it doesn't

  • Desktop-local workflow may not suit browser-based collaboration
  • Focused on technical audits rather than a complete SEO suite
  • Keyword research, rank tracking, and backlink analysis are outside its stated focus

• Sitebulb8.3/10 · 14-day trial

  A visual technical SEO crawler with JavaScript support, recurring audits, and prioritized issue guidance.

  Visit SitebulbFull verdict →
• Crab7.9/10 · Free plan

  A free desktop crawler with unusually broad JavaScript-aware technical audits.

  Visit CrabFull verdict →