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
StoryChief
Combines company context, competitors, live web, keyword/SERP, Search Console, trends, and content-audit data.
The AI marketing agent page says it uses web search, keyword research, Search Console, and content audit; the strategy page adds competitor websites and trends. https://storychief.io/ai-marketing-agent