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Keyword Research

The best keyword research tools in 2026 are Ahrefs (4.7/5) and Semrush (4.6/5), by SAASAF.AI rating. All 2 offer a free tier. Ahrefs starts at $99/month and has a free tier.

Tools for discovering search terms, analyzing search volume, and identifying ranking opportunities.

2 tools reviewed and compared

2 Total Tools
2 Free Tools
1 AI-Powered
1 Affiliate Programs

Ahrefs

SEO toolset for backlink analysis and keyword research

4.7/5 $[object Object]
Site Explorer Keyword Explorer Site Audit Rank Tracker
View Details Visit Site

Semrush

All-in-one SEO and digital marketing toolkit

4.6/5 $[object Object] AI Affiliate
Keyword Research Site Audit Backlink Analysis Rank Tracking
View Details Visit Site

Keyword Research Tools: Frequently Asked Questions

What is the best keyword research tool?

Ahrefs is the top-rated keyword research tool on SAASAF.AI, with a 4.7/5 rating. Ahrefs is a leading SEO toolset known for its extensive backlink index, keyword research, site auditing, and rank tracking capabilities. Ahrefs starts at $99/month and has a free tier. Other highly rated options include Semrush (4.6/5).

Are there free keyword research tools?

Yes. All 2 keyword research tools listed on SAASAF.AI offer a free tier. The highest rated are Ahrefs (4.7/5) and Semrush (4.6/5). Ahrefs paid plans start at $99/month. Semrush paid plans start at $129.95/month. Free tiers usually cap seats, usage or features, so check each plan before you commit.

How much do keyword research tools cost?

Listed starting prices for keyword research tools on SAASAF.AI range from $99 to $129.95 per month. Ahrefs has the lowest listed starting price at $99/month. All 2 also offer a free tier. Starting prices exclude extra seats, usage and add-ons.

Which keyword research tools use AI?

Semrush (4.6/5) is the only AI-powered keyword research tool of the 2 listed on SAASAF.AI. Semrush is AI-powered and uses a proprietary AI model. Semrush starts at $129.95/month and has a free tier. AI features vary by plan, so check which tier includes them.

How many keyword research tools does SAASAF.AI compare?

SAASAF.AI compares 2 keyword research tools: Ahrefs and Semrush. 2 have a free tier. 1 is AI-powered. Ratings range from 4.6/5 to 4.7/5. Every tool links to a full profile with pricing, features and alternatives. Tools are added as they are reviewed.

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