Research depth
Discovery
How well the tool supports keyword, competitor, SERP, backlink, or market research before execution.
CanIRank
Very broad multi-source SEO and SERP research.
Competitive analysis covers over 200 ranking factors from seven sources, including Moz, SEMRush, Ahrefs, social media, SimilarWeb, and BuzzSumo. https://www.canirank.com/seo-software/seo-competitor-analysis
Majestic
Deep backlink research across URL, domain, referring-domain, anchor-text, topic, link-context, competitive, fresh, and historic views.
Site Explorer documents domain/hostname/URL analysis, Trust Flow, Topical Trust Flow, anchor text, new/lost links, Link Graph, Similar Sites, and 15+ years of Historic data: https://majestic.com/reports/site-explorer