What free AI SEO tools are you actually using in 2026?

I've been testing various free AI SEO tools recently and noticed that a few are consistently useful for keyword research, content planning, and technical SEO.

Some that stood out to me:

- ChatGPT

- Google Gemini

- Google Search Console

- Bing Webmaster Tools

- Ahrefs Webmaster Tools

- Rank Math AI

I'm curious what everyone here is actually using in production.

Which free AI SEO tools have delivered the best results for you in 2026, and why?