How Data From Popular Keyword Research Tools Compare

Large Scale Study: How Data From Popular Keyword Research Tools Compare

We recently analyzed 10 of the most popular keyword research tools in the SEO industry.

Our goal?

To compare the accuracy and breadth of the data found within each tool.

Specifically, we analyzed monthly search volume, keyword difficulty, CPC estimates and search suggestions across popular SEO tools, including:

To our knowledge this is the first large-scale comparison of the data provided by various keyword research tools.

And now it’s time to share what we discovered.

Summary of Our Key Findings:

1. Ahrefs and SEMrush generate the highest number of keyword suggestions, followed by Ubersuggest, Sistrix, and SECockpit.

2. The Google Keyword Planner provides 67.9% fewer keyword suggestions than the average output from other major paid SEO tools. However, KWFinder and KWTool both produce similar amounts of keyword suggestions compared to GKP.

3. KeywordTool.io and Sistrix tend to provide higher than average monthly search volume estimates. Sistrix’s search volume estimates are 233% higher than the median, while KeywordTool.io is 47% above the median. Moz and Ahrefs skew towards slightly lower search volume estimates. Ahrefs’s search volumes are 37% less than the median while Moz Pro’s search volume estimates are 33% below the tool-wide median.

4. When analyzing search volume data for popular search terms (>10k searches/month) Sistrix has significantly higher monthly search…

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