Ahrefs

Ahrefs owns the data layer of SEO: the internet's most-crawled backlink index, deep keyword databases, content-gap analysis and rank tracking. For DTC stores, it answers the strategy questions content tools can't — what does the whole search landscape around my category look like, who links to competitors, and where are the unclaimed gaps?

Its AI content features (title ideas, outlines, drafting inside the content editor) are real but secondary; you buy Ahrefs for the data and keep your writer in Surfer/Frase or a general assistant.

The free Ahrefs Webmaster Tools tier is genuinely valuable for small stores — your site's backlink and basic keyword data, free.