Hundreds, easily, and that number keeps growing. The useful question isn't how many exist but which ones actually matter. For most businesses, you need three: Google Search Console, which is free and shows what searches you appear for and flags technical problems, Google Analytics, which is free and shows what visitors do on your site, and one competitive research tool like Ahrefs, Semrush, or Moz that lets you see what your competitors rank for and where their backlinks come from. Everything beyond those three is either a specialty tool for a specific task, like Screaming Frog for technical audits, or a convenience layer that repackages data you could get elsewhere. The tool doesn't do the SEO. The tool shows you what needs fixing and whether your fixes worked. A business owner with three free tools and a clear strategy will outperform someone with twelve paid subscriptions and no plan.
SEO FAQ