Yoast
Cost - Freemium - free version but paid for Yoast premium is £99 per year
Functionality - On page optimisation, keyword targeting, metadata updates and sitemap generation
Key Feature - Content and readability analysis
Last Update - This year 2026
Rank Math
Cost - Freemium - paid tiers available
Functionality - Schema, broken link monitoring, keyword optimisation
Key Feature - Advanced schema and redirects
Last Update - Active updates in 2026
All in One SEO
Cost - Freemium - paid plans have advanced features
Functionality - SEO management, sitemaps, local SEO
Key Feature - TruSEO score with checklist
Last Update - Regular updates in 2026
Schema Pro
Cost - Only paid
Functionality - Adding structured data/schema markup to a site
Key Feature - Automated deployment
Last Update - Again, ongoing in 2026
Redirection
Cost - Completely free
Functionality - Manage 301 redirects and get 404 alerts
Key Feature - Bulk redirect management with regex
Last Update - Maintenance updates this year