SEO Otter
5.8#30 in seo audit softwareFree planFree planWeb
VisitSEO Otter suits developers and site owners who want command-line or browser-based SEO auditing. It fits workflows using CI/CD, repositories, and the named site frameworks.
It may suit people looking for keyword research, rank tracking, site audits, backlink analysis or competitor research with API access. The free tier is for those whose work fits within one project and its stated limits.