Research depth
Discovery
How well the tool supports keyword, competitor, SERP, backlink, or market research before execution.
Mangools
Extensive first-party SEO data and multiple dedicated research products cover keywords, SERPs, backlinks, domains, ranks, and AI visibility.
Homepage lists 2.5B+ keywords, 30M+ SERPs, 9.5T backlinks and core tools: https://mangools.com/; API documents keyword, SERP, backlink, domain, rank and AI data: https://mangools.com/api
Serpstat
Very deep SEO research coverage across keywords, domains, competitors, backlinks, PPC, and SERPs.
Features lists keyword research, competitor/PPC analysis, backlinks, batch analysis, clustering, and keyword trends; https://serpstat.com/features/