Screaming Frog SEO Spider is a desktop website crawler from the UK; the free version crawls 500 URLs and the $279/year paid license unlocks unlimited crawling and 300+ technical SEO checks.
Sitechecker is a website audit and monitoring platform built for SEO agencies, offering crawler audits, rank tracking, GSC dashboards, and AI visibility tracking, used by 1000+ teams to manage client sites at scale.
Screaming Frog is a UK-based technical SEO desktop tool brand; its SEO Spider crawls 500 URLs free and $279/year paid, and together with Log File Analyser and an API it covers auditing, log analysis and automation.