Research depth
Discovery
How well the tool supports keyword, competitor, SERP, backlink, or market research before execution.
Google Analytics
Deep first-party audience and journey analysis, but little pre-execution SEO research.
Google says Analytics measures customer interactions across sites and apps throughout the lifecycle. https://marketingplatform.google.com/about/analytics/
Sitebulb
Deep technical crawl investigation with some link analysis, but not a broad keyword, market, backlink-index, or SERP research suite.
Sitebulb documents website crawling, technical audit hints, internal-link analysis, and visualizations. https://sitebulb.com/hints/