Research depth
Discovery
How well the tool supports keyword, competitor, SERP, backlink, or market research before execution.
KoalaWriter
Deep, per-section research is built into the writer.
The official Deep Research page says it fetches live SERPs per section, scrapes up to 5 URLs per section, and feeds source content into the prompt: https://koala.sh/features/deep-research
SEOmatic
Strong site and search research, though primarily focused on connected properties.
Nightly crawling checks nine issue types; agents read Search Console, Google/AI search and build a ranked plan. Official source: https://seomatic.ai/features/site-audit