🚀 Quick Takeaways It is a category, not one app: A backlink finder covers everything from free one-page checkers to full platforms that crawl the web and store their own link indexes. Five names lead the market: Ahrefs, Semrush, Moz, Majestic and SE Ranking handle most professional work, while Ubersuggest, Mangools, SpyFu and SISTRIX serve..