Keyword Cluster vs Fog Mode

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 Fog Mode
Detail	Keyword Cluster	Fog Mode
What it does	Chrome extension for keyword clusters and SEO insights	Free Chrome extension with reading tools, focus aids, and wellness breaks for managing brain fog while reading
Stage	Not given	Startup
Founded	Not given	2025
Based in	Not given	Not given
Pricing model	Free	Free
Pricing	Not 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	Larger, roomier text formatting Focus line guide for reading Clean reader interface Auto-scroll functionality Ambient sounds Breathing break reminders Integrated notes feature
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	Designed specifically for people with brain fog Combines reading assistance with wellness features like breathing breaks Completely free with no paywalls or premium tiers
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	11 no change since last check	Not checked yet no change since last check
Trust Flow (Majestic)	3	0
Citation Flow (Majestic)	23	15
Referring domains (Majestic)	50	4

4 details filled in for both companies.