Best Free SEO Tools
The best free SEO tools in 2026 are Ahrefs (4.7/5) and Semrush (4.6/5), by SAASAF.AI rating. Ahrefs starts at $99/month and has a free tier.
Compare the top free SEO tools. See what you get for free, where the limits are, and what it costs to upgrade.
2 free tools available
Free SEO Tools: Frequently Asked Questions
What is the best free SEO tool?
Ahrefs is the top-rated free SEO 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).
How much do free SEO tools cost to upgrade?
Paid upgrades for the free SEO tools on SAASAF.AI start between $99 and $129.95 per month. Ahrefs has the cheapest listed upgrade at $99/month. Semrush paid plans start at $129.95/month. Upgrades usually add seats, higher usage limits, automation and admin controls.
Which free SEO tools use AI?
Semrush (4.6/5) is the only AI-powered free SEO 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 free SEO tools are there?
SAASAF.AI compares 2 free SEO tools: Ahrefs and Semrush. 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. Ahrefs has the lowest listed starting price at $99/month.
Need More Features?
Browse all SEO tools including premium options with advanced features and support.
View All SEO ToolsCompare Pricing
See a full pricing breakdown for every SEO tool to find the best value.
Compare Pricing