Research depth
Discovery
How well the tool supports keyword, competitor, SERP, backlink, or market research before execution.
Moz Pro
Strong breadth of SEO research workflows across keywords, competitors, SERPs, domains, and brand authority.
The page lists Keyword Explorer, Keyword Suggestions, Search Intent, Domain Overview, Competitive Research & SERP Analysis, and Brand Authority: https://moz.com/products/pro
SEOptimer
Useful keyword, backlink and competitor lookups, but primarily an audit/reporting product rather than a deep research suite.
The audit includes ranking keywords, estimated volume/traffic and backlink summaries; the pricing page lists 25/100/250 keyword searches and 25/50/150 backlink lookups: https://www.seoptimer.com/seo-audit/ https://www.seoptimer.com/pricing/