Yoast SEO is a WordPress plugin offering free and premium versions with AI-powered SEO optimization, readability checks, schema markup, and internal linking suggestions.

Yoast is used by 13+ million customers and offers a free version with essential SEO features including analysis, readability scoring, automatic XML sitemaps, schema markup, and meta editing. Premium versions add advanced features like internal linking suggestions, redirect management, support for multiple focus keywords, and ad-free experience. The platform includes AI-powered SEO suggestions, real-time content analysis, automatic redirects, seamless technical SEO, and 24/7 premium support.
SEO A/B testing and split testing platform for optimizing organic performance
Founded
SEOTesting is a platform for running SEO A/B tests and tracking SEO changes to identify which page changes increase clicks, impressions, CTR, and conversions. Launched in 2016, it uses Google Search Console and Google Analytics data.
All-in-one SEO crawler and site audit tool for large websites
JetOctopus is a cloud-based SEO crawling and auditing solution combining advanced crawling capabilities with comprehensive analytics. It processes up to 250 pages per second with no crawl limits or project limits.
Browser extension providing real-time keyword data across multiple platforms
Starting Price
Keywords Everywhere is a versatile browser extension for Chrome, Firefox, and Edge that displays real-time keyword data directly within users' web browsers. It integrates seamlessly with over 20 platforms including Google, YouTube, Amazon, and eBay.