How to Tell if a Competitor Is Buying Links

Pull their backlink profile and look for the fingerprints money leaves: exact-match commercial anchors at rates no editor would produce, a cluster of unrelated blogs running identical post formats, links arriving in tight batches, and "write for us" or sponsored-post pages on the linking sites. No single sign proves anything. The pattern does.

You will never get certainty from the outside — only Google and the two parties know what changed hands. What you can get is a confident read, in about an hour, and that is usually enough to make the decision you actually came for.

First, be honest about why you want to know

There are three good reasons and one bad one.

Good: calibrating your own budget. If a rival's position is bought, the gap between you is a spending gap, not a quality gap — and copying their content harder will not close it.

Good: judging whether the gap is reachable. A competitor with 300 genuinely earned editorial links is a long project. A competitor with 300 purchased links is a house built on something that can be neutralised in a single update.

Good: predicting durability. Bought profiles are volatile. Knowing a rival is renting their ranking tells you the SERP is likelier to move than it looks.

Bad: building a case to report them. You can, and we cover it below, but manage your expectations — it is close to the lowest-return use of the hour you are about to spend.

The seven signals, most reliable first

#	Signal	What it looks like	How to check
1	The linking site advertises	A "Write for us", "Sponsored post" or "Advertise" page with a price or a form	Open the site, check nav and footer
2	Anchor text no editor writes	Exact-match commercial phrases repeated across unrelated domains	Anchor text report in any backlink tool
3	Batch arrival	15–40 new referring domains inside a fortnight, then nothing	Sort referring domains by first-seen date
4	Template farms	Different domains, same layout, same post length, same author bio format	Open 10 linking pages side by side
5	Topic-blind hosts	A single blog covering crypto, dentistry, casinos and SaaS	Scan the linking site's categories
6	Links dropped into old posts	A commercial link mid-paragraph in a 2019 article about something else	Read the linking page around the link
7	Hosts that rank for nothing	Decent domain metrics, near-zero organic traffic	Check the linking domain in any traffic tool

Signal 1 is the only near-proof on the list: a site with a public rate card is selling links, and a link from it was almost certainly bought. Everything else is circumstantial on its own and persuasive in combination.

Signal 7 deserves a note, because it is the one most people miss. Link vendors optimise the metrics buyers check — Domain Rating, Domain Authority — and ignore the ones they do not. A domain with DR 55 and a few hundred monthly visits is a metric built for sale, not an audience. The difference between the two is covered in domain authority vs domain rating.

Running the check properly

An hour, in order.

1. Export their referring domains, not their backlinks. Domains are the unit that matters, and it collapses sitewide footer links into one row instead of four hundred. Use whichever tool you have; the sourcing options are compared in what is the best backlink tool.

2. Sort by first-seen date and look for steps. Organic link acquisition is lumpy but continuous. Purchased acquisition looks like a staircase: a flat line, a vertical jump, another flat line. Batches that coincide with nothing — no launch, no funding round, no study published — are the ones to note. This is the velocity pattern described in what is link velocity.

3. Pull the anchor text report and count. You are looking for the share of links using exact-match commercial phrases. Naturally earned profiles are dominated by brand names, bare URLs and awkward partial phrases, because that is what real writers type. A profile where a third of anchors are the target keyword verbatim did not happen by accident — see what is a healthy anchor text ratio for what normal actually looks like.

4. Open twenty linking pages by hand. This is the step that decides it, and there is no tool substitute. For each one, ask: does this site have a "write for us" page? Does the article read like it was commissioned around the link? Does the site publish on unrelated topics? Who else does it link out to — is your competitor sitting alongside a casino and a CBD brand?

5. Search the host domain by name. Add "guest post", "sponsored post" or "link insertion" to the domain name. Sellers advertise. Many are listed on public marketplaces, and finding a rival's linking domain on a price list settles the question quickly.

6. Check whether the link is qualified. Google asks that paid placements carry rel="sponsored" or rel="nofollow". Sites that sell links and mark them correctly are running advertising, which is legitimate. Sites that sell links and leave them followed are selling ranking credit, which is what Google's spam policies prohibit. The distinction is a genuine one.

What the answer does not tell you

Three honest caveats, because overreading the evidence is the usual failure here.

Batchy is not always bought. Genuine digital PR produces batches — a study lands, twenty outlets cover it in a week. So does a Product Hunt launch or a funding announcement. Check whether something real happened on that date before concluding.

Guest posting is not automatically paid. Plenty of the pattern in signals 3 and 4 also fits an agency doing legitimate outreach at volume. The tell is whether the host sites have real audiences.

Bought does not mean working. This is the one that changes decisions. Google's link spam systems neutralise unnatural links rather than punishing them: the links stop counting and whatever ranking they were propping up goes with them, with no notification and nothing to appeal. A rival with a largely purchased profile may well be ranking on the minority of it that was earned, and paying for the rest out of habit.

What to do with the answer

Do not copy it by reflex. Google's spam policies name "exchanging money for links, or posts that contain links" and "advertorials or native advertising where payment is received for articles that include links that pass ranking credit" as link spam, and state that sites violating the policies "may rank lower in results or not appear in results at all." The honest cost-benefit is laid out in is it worth paying for backlinks, and the legal position — separate from the Google position — in is link building illegal.

Reporting is available, but set expectations low. Google's spam report form accepts paid-link reports and takes up to five URLs per submission. Google has been consistent that these reports feed algorithmic improvements rather than triggering individual manual actions, so treat it as a contribution to the commons, not a competitive move. Nothing will happen this quarter.

Mine the profile for what you can actually use. The genuinely useful output of this hour is not the verdict, it is the list. Every linking domain in a competitor's profile that has a real audience, publishes on your topic and earned rather than sold its position is a target you now know about. That process is how to find where competitors get their backlinks.

Then close the gap with something durable. Reciprocal exchange with real site owners is the version of this that does not depend on a monthly invoice: Backlinkster matches you with owners in adjacent niches for 1-for-1 in-content swaps and verifies every placement with code, so you can see what you have rather than trusting a vendor report. Five swaps a month free; see the plans.

Frequently asked questions

Can you prove a competitor bought a backlink? Not from outside. The closest thing to proof is finding the linking domain on a public price list or with a "write for us" page quoting a fee. Everything else — anchor patterns, batch timing, template farms — is circumstantial and only convincing in combination.

What are the clearest signs of bought backlinks? A linking site with a published rate card, exact-match commercial anchors repeated across unrelated domains, referring domains arriving in tight batches with no real-world event behind them, and host sites with strong metrics but almost no organic traffic.

Do bought backlinks still work in 2026? Sometimes, briefly. Google's link spam systems neutralise unnatural links algorithmically — the links stop counting and any ranking they supported is lost, with no notification. Purchased profiles are therefore volatile rather than reliably effective.

Should I report my competitor's paid links to Google? You can, via Google's spam report form, up to five URLs per report. Google has said these reports mainly inform algorithmic detection rather than prompting action against a specific site, so expect no visible outcome.

What tools show whether links were paid for? None, directly. Ahrefs, Semrush and Moz show referring domains, first-seen dates, anchor text and rel attributes — the raw material. The judgement comes from opening the linking pages yourself.

Is a sponsored link the same as a paid link? Only in how the money moves. A paid placement marked rel="sponsored" or rel="nofollow" is advertising and is fine by Google. The same placement left followed is selling ranking credit, which Google's spam policies prohibit.

The bottom line

Export referring domains, sort by first-seen date, count the exact-match anchors, then open twenty linking pages and look for rate cards and real audiences. The pattern will be obvious inside an hour. Then remember what the answer is worth: a purchased profile tells you the SERP is less stable than it looks and the gap is narrower than the numbers suggest — which is a reason to build something durable, not to start buying.