SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
Netpeak Spider - A desktop tool for fast and comprehensive technical audit of the entire website.
Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.
Free SEO Checker by Spotibo - An SEO checker that analyses based on Google's algorithm 👀
Website Checker Tech - WebsiteChecker.Tech is SaaS tool that detects SEO and availability issues of your website, making it easier for you to fix them.
WebsiteChecker - Sends you alerts when your website goes down.