Research depth
Discovery
How well the tool supports keyword, competitor, SERP, backlink, or market research before execution.
Screpy
Covers keyword research, SERP analysis, organic keywords, competitor ads, backlinks, referring domains, and Search Console, but depth and quotas vary by plan.
Feature directory lists Keyword Research, SERP Analysis, Organic Keywords, Competitor Ads, Backlink Checker, Referring Domains, and Search Console: https://screpy.com/features/
WooRank
Broad SEO research coverage across keywords, competitors, site audits and a 75+ attribute index.
The Index says users can search across 75+ SEO data attributes: https://www.woorank.com/en/seo-index