How to Find Competitor Backlinks (Free & Paid Methods That Actually Surface Gaps)

Your competitors have already done your link prospecting for you. Every backlink they hold is a site that demonstrably links to companies like yours - which makes their link profile the highest-signal prospect list you will ever get, free of charge. The catch is that most "spy on competitor backlinks" advice stops at "put their domain in a tool." This guide goes further: which methods actually work (including the genuinely free ones), how to read what you find without getting fooled by junk, and how to turn the raw list into a prioritized acquisition plan.

Key takeaways

• The goal is not their full backlink list - it is the gap: domains linking to two or more of your competitors but not to you. Those sites link to your category by habit; they are your warmest prospects.
• Free methods get you surprisingly far: backlink checkers' free tiers, Google operators, and watching competitors' own "as featured in" trails.
• Every major index (Ahrefs, Semrush, Moz) sees a different slice of the web - serious gap analysis cross-references at least two.
• Volume is a trap: a competitor's 5,000 backlinks usually reduce to a few dozen worth copying. Vet like a buyer: real traffic, topical fit, indexed pages.
• The output should be a table with an owner and a next action per prospect - "replicable guest post," "resource page pitch," "integration page," "skip." Data without a next action is entertainment.

Method 1: The link-gap workflow (the one that matters)

Backlink gap analysis beats backlink lists because it filters for intent. A domain that links to one competitor might be a coincidence or a paid deal; a domain linking to two or three competitors but not you is a site that habitually covers and links to your category. That is a prospect with a proven behavior pattern.

The workflow: pick three to five real search competitors (who ranks for your money keywords - not who you think of as rivals), run them through a link-intersect tool, and filter the intersection: linking domains ≥2 competitors, you excluded. Then vet what survives for real organic traffic and topical fit, and classify each by how the competitor earned it - a guest post you can replicate, a listicle you can pitch your way into, an integration page you qualify for, or a paid placement you can buy more transparently.

We built a free tool that runs exactly this workflow for SaaS sites - drop in your domain and competitors and the backlink gap audit returns the intersect with traffic-vetted prospects. It is the same analysis we run before recommending inventory to buyers.

Method 2: Free backlink checkers (what each free tier really gives you)

Every major index has a free door, and combined they cover more than any single one:

• Ahrefs' free backlink checker shows the top 100 backlinks per domain with DR and anchor text - enough to profile a competitor's strongest links, which are usually the ones worth studying.
• Semrush's free tier allows a handful of full analyses per day - enough to run your top three competitors weekly.
• Moz Link Explorer gives ten free queries a month with DA and spam score, useful as the cross-check vote.
• Bing Webmaster Tools is the sleeper: verify your own site and its backlink section reports links to any domain, free, from Bing's own index.

The free tiers share one limit: you see samples, not profiles. For a young site's competitors that sample is often most of the story; for established competitors you will eventually want a full index - or the gap tool doing the cross-referencing for you.

Method 3: Google operators and public trails

No index sees everything, and some of the best prospects never show up in one. Three manual trails that consistently surface them:

• Guest-post trails. Search "author name" -site:competitor.com for their founders and content leads - every guest post they have written is a site that accepts guest posts from your niche. Their digital PR wins leave the same footprint.
• "As featured in" pages. Competitors helpfully list their own best links on about pages, press pages, and case-study footers.
• Mention-without-link searches. Search their brand name minus their domain to find sites that cite your category - then check whether those pages link to anyone. Pages that mention competitors without linking are soft targets for a better resource.

Method 4: Watch their velocity, not just their stock

A snapshot tells you what a competitor earned over years - much of it unrepeatable. Their new links this month tell you what is working right now: an active guest-post push, a listicle campaign, a new integration program. Most paid tools expose a "new backlinks" view; check it monthly for your top three competitors and you will spot campaigns while the sites involved are still saying yes. Track your own profile the same way with a monitoring system so you can tell copied tactics are actually landing.

Method 5: Read the anchors before you copy anything

Before replicating a single link, read the competitor's anchor-text distribution. Two reasons. If their profile is stuffed with exact-match commercial anchors, part of their "success" is borrowed risk - do not copy the pattern that eventually gets corrected. And where their anchors are natural, the anchors show you which pages they are pushing - which telegraphs their keyword strategy more honestly than any announcement. A competitor pointing twenty links at a pricing-comparison page is telling you where their pipeline comes from.

From list to plan: the 30-minute prioritization

Take the vetted gap list and score each prospect on three columns - link strength (traffic × relevance), effort to acquire, and replicability of the method - then work the list top-down: integration pages and warm listicle pitches first (high strength, low effort), guest-post targets second, paid placements where the site is worth it third. Cap the list at twenty live prospects; a focused twenty beats a spreadsheet of four hundred that nobody works. The strategic sequencing - which pages deserve those links first - is covered in the SaaS link building guide.