KeywordTool.io vs Semrush (2026)
We compared both. Here is the honest comparison.
KeywordTool.io
70/100
Free
GoodVS
Semrush
79/100
$140/mo
Top PickScore Breakdown
Category
KeywordTool.io
Semrush
Output Quality
68
▼ Loses80
▲ WinsSpeed
72
Tie72
TieEase of Use
74
▲ Wins64
▼ Losesfeatures
70
▼ Loses94
▲ WinsOverall
70
79
Pricing
Starting Price
Free
$140/mo
Real Price
Free / $89/mo
$140/mo
Price Note
Free tier: keywords without search volume; Pro: full data
Pro plan (1 user)
KeywordTool.io
Best For
✓ Content ideation
✓ YouTube creators
✓ Amazon sellers
✓ Quick long-tail discovery
Not For
✗ Full SEO campaigns
✗ Competitive analysis
✗ Technical SEO
Semrush
Best For
✓ SEO agencies
✓ Enterprise content teams
✓ Serious niche site builders
Not For
✗ Beginners
✗ Low-budget operations
✗ Simple keyword research
Pros & Cons
KeywordTool.io
+ Pulls directly from Google, YouTube, Amazon, Bing autocomplete
+ Free tier generates 750+ long-tail keywords instantly
+ YouTube keyword research is best-in-class
+ No account needed for basic searches
− No search volume on free tier
− Very expensive paid plan for what you get
− No difficulty scores or SERP analysis
Semrush
+ Most comprehensive keyword database: 25B+ keywords
+ Competitor traffic analysis is best-in-class
+ Position tracking with daily updates
+ Site audit catches 130+ technical SEO issues
+ ContentShake AI writes SEO articles inside the tool
− Expensive — $140/mo is steep for solo operators
− Data overload — overwhelming for beginners
− Some features duplicated across tools