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Keyword Cluster vs Header Override

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Keyword Cluster compared with Header Override
DetailKeyword Cluster logo Keyword ClusterHeader Override logo Header Override
What it doesChrome extension for keyword clusters and SEO insights Open-source browser extension to modify HTTP request and response headers and cookies
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelFree Open source
PricingNot given Not given
Key features
  • Keyword clustering by search intent
  • Long-tail keyword discovery
  • AI-powered keyword grouping
  • Real-time insights on Google and Bing
  • Topic cluster identification
  • Related search query suggestions
  • No account or login required
  • Support for Google, Bing, and YouTube
  • Modify request and response headers with a focused editor interface
  • Scope rules to specific URLs using browser-supported filter patterns
  • Customize response cookies with Domain, Path, SameSite, Lifetime, Max-Age, and Secure attributes
  • Create up to five local rule profiles for different projects and test setups
  • Import and export profiles as local JSON files between browsers
  • Enable, disable, delete, and annotate rules with comments
  • Support for Chrome, Edge, and Firefox
  • All rules stored locally in browser with no server transmission
What makes it different
  • Shows keyword clusters directly in search results without leaving Google or Bing
  • Completely free with no account needed
  • Eliminates need to switch between multiple SEO tools
  • Groups keywords by search intent for better content alignment
  • Open-source with MIT License and full transparency
  • Rules stored entirely locally with no analytics, tracking, or external servers
  • Lightweight alternative to ModHeader
  • URL scoping prevents rules from affecting unintended websites
  • Simple interface requires no coding knowledge
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)11 no change since last check8 no change since last check
Trust Flow (Majestic)33
Citation Flow (Majestic)2318
Referring domains (Majestic)5013

4 details filled in for both companies.

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