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
Scalenut
Deep SERP, competitor, topic, prompt, and page-level research is documented, though the site does not document every possible data source.
The Features FAQ says SERP statistics come from the top 30 ranking articles and Cruise Mode breaks down the top 10/20/30 competitor outlines: https://www.scalenut.com/features