Linkody suits SEO professionals and agencies tracking backlinks across their own and competitors' domains.
SEOPress provides keyword lookup and position monitoring through its API.
DataForSEO SERP API provides search-results data through API and web access.
Rankora says its core users are agencies and freelance SEO consultants.
MarketMuse is a web SEO platform for content planning and optimization.
WooRank suits agencies, business owners, and marketing professionals who need SEO analysis and keyword tracking.
Seodar is aimed at in-house SEO specialists, developers responsible for a website, and agencies that report to clients.
Yandex Webmaster offers keyword research, rank tracking, site audits and backlink analysis via web and API.
Google Keyword Planner is a free web and API service for keyword ideas, search-volume and ad-cost estimates.
Keyword Insights is aimed at digital marketers and teams handling SEO research, content planning, and publishing.
Surfaceable is an API SEO tool focused on keyword research.
CrawlZilla suits SEO professionals who need to crawl websites, inspect technical page data, monitor changes, or use an API.
