Research depth
Discovery
How well the tool supports keyword, competitor, SERP, backlink, or market research before execution.
Goodie AI
Strong AEO research layer built around real customer prompts and demand patterns.
The homepage says Research understands real customer prompts, search-volume patterns, and visibility opportunities; Prompt Research is listed as a product area. https://higoodie.com/
seoClarity
Very deep first-party SEO research coverage.
The keyword research page documents AI Topic Research, Research Grid, content gaps, content ideas, keyword difficulty, answer-box opportunities, video keywords, 30+ billion clickstream data, 500 million Research Grid keywords, and 1 billion Google Suggest keywords: https://www.seoclarity.net/keyword-research/