Short answer
Rank Math Content AI is the cheapest and broadest (unlimited sites, long-form articles, works in Elementor and Divi). Yoast SEO AI is the most polished inside the editor but needs Premium per site. AIOSEO leads on AI agents, with a built-in MCP server. Don't switch SEO plugins just for AI: use the one you have.
Side by side
| Rank Math Content AI | Yoast SEO AI | |
|---|---|---|
| Made by | Rank Math | Yoast |
| How it connects to WordPress | Built into the Rank Math SEO plugin | Built into Yoast SEO Premium |
| Starting price | From $6.99/mo billed yearly | Premium $118.80/year |
| Free option | Yes | Yes |
| Best for | Existing Rank Math users wanting AI help with metadata, alt text and SEO fixes. | Yoast users who want AI-assisted metadata and optimization without managing credits. |
| AI writing | Long-form articles, 100+ AI tools | Titles, meta, optimise, summarise |
| Sites | Unlimited | Per site |
| Agent support | — | Registers Abilities API abilities |
Pick Rank Math Content AI if…
- You want long-form AI drafting
- You manage many sites on one plan
Pick Yoast SEO AI if…
- You already use Yoast
- You mainly need titles, meta and optimisation help
Full reviews
AI writing & SEO pluginsRank Math Content AIAI writing and SEO tools inside Rank Math, usable across the block editor, Classic Editor, Elementor and Divi.From $6.99/mo billed yearly · free optionAI writing & SEO pluginsYoast SEO AIAI titles, meta descriptions, content optimisation and summaries inside Yoast SEO Premium.Premium $118.80/year · free option
Prices and features checked November 2026 from each vendor's own site. See each review for sources.