SEO Analyzer By Neil Patel - A free SEO analyzer for your site

SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.

SE Ranking - All-in-One cloud-based SEO software for agencies, marketing teams and webmasters

Rank Tracker - Rank Tracker is an SEO tool for tracking and improving keyword rankings across multiple websites and search engines.

Free SEO Checker by Spotibo - An SEO checker that analyses based on Google's algorithm 👀

Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.