Link Building Services: Vet a Vendor Without Getting Burned

Most buyers compare link building services on price per link, Domain Rating and turnaround. Those numbers say almost nothing about whether the links will count. The question that does is simpler: where does your money go? If it pays for people’s time and content worth citing, you’re buying a legitimate service. If it pays a publisher to place a followed link, you’re buying what Google’s link spam policy names, and the likeliest outcome isn’t a penalty. It’s a link Google quietly ignores while you keep paying. Below: what these services sell, the red flags, a one-hour vetting method and the contract terms that protect you.

What a Link Building Service Actually Sells

A digital PR agency pitching research to journalists, a freelancer doing broken-link outreach, a marketplace selling “guest posts on DR 70 sites” and a private blog network seller can all call themselves a link building service. Strip the branding and every invoice pays for some mix of three things:

Labour. Prospecting, writing, outreach, follow-ups and reporting. Paying for skilled time is ordinary outsourcing.
The asset. A study, free tool, guide or dataset that gives editors a reason to link. This is how links are earned.
The placement. Money, goods or services passed to the site owner in exchange for the link. That’s a paid link, whatever the vendor calls it.

The first two are fine. The third is what Google’s rules address, and the part many vendors blur. Before you look at any metric, ask: “Does any part of my fee go to the publisher?”

What Google’s Link Spam Policy Says About Paid Links

Google’s spam policies on Search Central define link spam as “creating links to or from a site primarily for the purpose of manipulating search rankings.” The examples read like a menu of common link building packages:

“Exchanging money for links, or posts that contain links,” and “exchanging goods or services for links.”
“Advertorials or native advertising where payment is received for articles that include links that pass ranking credit.”
“Excessive link exchanges,” “using automated programs or services to create links,” and “low-quality directory or bookmark site links.”

Buying a link isn’t illegal. Google says advertising and sponsorship links are normal, as long as they’re qualified with rel="sponsored" or rel="nofollow" (sponsored is preferred; see our guide to nofollow, sponsored and UGC links). That’s the paradox of this market. A paid link done by the book carries a tag telling Google not to pass ranking credit. A paid link sold for ranking credit is the version the policy targets.

The Real Risk: Paying for Links That Count for Nothing

Most buyers fear a penalty. The common outcome is quieter. Announcing its December 2022 link spam update, Google said SpamBrain “can now detect both sites buying links, and sites used for the purpose of passing outgoing links,” and works “to neutralize the impact of unnatural links,” adding that rankings may change “as spammy links are neutralized and any credit passed by these unnatural links are lost.”

Neutralised links send no notification. Your report shows live placements with a healthy DR column, and the target page doesn’t move. Nothing tells you whether the links were ignored or need more time, so it’s easy to keep paying for a year before you notice.

The loud outcome exists too. Search Console’s Manual Actions report can show “Unnatural links to your site,” which Google describes as “a pattern of unnatural, artificial, deceptive, or manipulative links pointing to your site.” Recovery means asking site owners to remove links, disavowing the rest and filing a reconsideration request; our guide to the unnatural links penalty walks through it. The vendor who caused it rarely helps.

Six Link Building Service Models Compared

Here is how the usual offers compare when you follow the money. Prices vary too much by niche and vendor to list, so check each provider’s current page, and treat a price far below the market as a warning.

Model	What you pay for	Money to publisher?	Policy risk	Question to ask
Digital PR / data campaigns	Research, an asset, journalist outreach	No	Low	“Show me three past campaigns and their coverage.”
Content-led outreach	Prospecting, writing, outreach time	No, if editors accept on merit	Low	“What share of your pitches get declined?”
Paid guest posts	An article on a site that charges	Yes	High if followed	“Will the link carry rel=sponsored?”
Niche edits / link insertions	A link added to an old article	Usually	High if paid and followed	“Was the owner paid?”
PBN or “private network” links	Links from sites the vendor controls	Vendor owns the site	Very high	“Do you own any site you link from?”
Bulk packages (directories, profiles, web 2.0)	Automated or templated placements	Varies	High, and weak anyway	“Is any of this automated?”

The bottom four rows are where “guaranteed” offers live. A real agency can do good outreach and still sell paid placements on the side, so ask about each line of the proposal separately. For the bundles themselves, see link building packages.

Red Flags That Should End the Conversation

Google’s “Do you need an SEO?” page is blunt: “No one can guarantee a #1 ranking on Google.” The link building versions of that warning:

Guaranteed DR or DA. Domain Rating is Ahrefs’ metric; Domain Authority is Moz’s. Ahrefs itself says “DR is not a Google ranking factor.” A vendor promising to raise it is selling the score. See what Domain Rating measures.
A price list by DR tier. “DR 30–40, DR 50–60, DR 70+” means a catalogue of sites that sell placements. Editors who link on merit don’t publish rate cards.
No live examples. “Our network is confidential” often means a PBN or sites rebuilt on expired domains. Google’s policies name “expired domain abuse” separately.
Fixed volumes on fixed deadlines. “20 links a month in 7 days” only works when links are bought. Earned links depend on other people saying yes.
Exact-match anchors by default. Your money keyword on most links is a manipulation pattern. Run any anchor plan through the Anchor Text Distribution Checker.
No replacement terms. Placements vanish when sites are tidied or sold. A vendor with no answer hasn’t been asked often enough.

Vendors rarely call a network a network. To recognise the pattern, read our guide to private blog networks.

How to Vet a Link Building Agency in an Hour

You need ten live URLs and a backlink tool. Ask the link building agency for ten placements from the last few months, in niches near yours, and check each:

Organic traffic and its trend. High DR with a flat or collapsing traffic line suggests a site valued for selling links, not for readers.
A “write for us” page that mentions fees. If you can find the price list in two minutes, so can Google.
Outbound links per post, and to what. Casinos, crypto and plumbers in one week means a link shop.
Topical fit with your page. A relevant mid-sized site beats an unrelated large one.
Signs of real readers. Named authors, comments, shares, links of their own. Hard to fake at scale.

Then check the vendor’s own site; an agency with a thin or spammy profile is telling you something. In SEO Rocket you can paste the agency’s domain or any sample placement into chat and pull its backlink profile, referring domains and organic traffic from real Ahrefs data, so the hour goes on judgement, not tab-switching.

A Worked Example: Scoring a Proposal

A composite of a typical pitch (illustrative, not one vendor):

“20 high-authority dofollow guest posts a month on DR 50+ sites, delivered within 14 days, permanent links, guaranteed DR increase within 90 days, anchors optimised for your main keywords.”

Dofollow guest posts at a fixed count: pre-arranged placements bought for ranking credit, the policy’s “posts that contain links” case. Red.
DR 50+: a third-party threshold, not a quality test. Amber until you see the sites.
14 days: editor-dependent outreach doesn’t run on a fixed clock. Red.
Permanent: nobody controls another person’s site forever. Amber; get replacement terms in writing.
Guaranteed DR increase: a promise about a metric Google doesn’t use. Red.
Keyword anchors: exact-match at volume. Red.

Four reds. Don’t haggle; ask whether they offer content-led outreach without paid placements, and walk if not. A good proposal looks dull by comparison: a target list you approve, a content angle, a range for expected links, and reporting on target-page rankings.

What to Put in the Contract

Site approval before outreach. You see each target domain and angle first and can veto it.
Full disclosure. Every live URL, target page, anchor and rel attribute, reported monthly.
No owned networks. A written statement that the vendor doesn’t own or control linking sites and doesn’t pay publishers for followed links.
Content ownership. Anything written for you is yours, including unplaced drafts.
Anchor control. You approve anchors, with branded and natural anchors as the default.
Exit terms. Short notice, no penalty for leaving.

If a vendor won’t sign the third point, you have your answer about the third column of the table above.

How to Measure Whether the Service Is Working

Judge a vendor on the pages it was hired to help, not on DR. Give it three to six months, because links take time to be crawled and counted, and track:

New referring domains to target pages. Not total backlinks. Check first-seen dates in a backlink tool to confirm reported placements are live and new.
Target-page rankings and clicks. Search Console for clicks, a rank tracker for the target keywords. Rising links with flat rankings after several months is the neutralisation signal.
Referral traffic. Placements that never send a single visitor usually sit on sites nobody reads.

Know which links you need before hiring. SEO Rocket’s backlink-gap check lists domains linking to your competitors but not to you, a realistic list to hold a vendor’s proposal against. It doesn’t sell links; it’s the measuring side of the deal.

Link Building Services FAQ

Are link building services against Google’s rules?

Not in themselves. Paying for outreach, writing and digital PR is outsourcing. Google’s policy targets exchanging money, goods or services for links that pass ranking credit. A paid link marked rel="sponsored" is allowed.

How much should a link building service cost?

It depends on the model (per link, monthly retainer or campaign fee) and the niche. Compare vendors’ current pages rather than a published average, and treat unusually cheap links as a red flag.

How long until links improve rankings?

Months, not weeks. Judge on target-page rankings after three to six months, not on the first month’s link count.

Should I disavow links a previous vendor built?

Usually not. Google says most sites won’t need the disavow tool, and to use it when you have “a considerable number of spammy, artificial, or low-quality links” that have caused, or likely will cause, a manual action.

When You Shouldn’t Hire Anyone Yet

Links make strong pages rank; they don’t rescue weak ones. If the target page is thin, slow, mismatched to intent or competing with your own similar pages, fix it first. Our guide on how to improve SEO covers the order of work. And if you can’t name a page a journalist or curator would want to cite, outreach turns into begging or buying, so budget for the asset before the promotion.

The playbook proven across 1,000,000+ ranking pages starts there: pay for time and assets, not placements. Ask where the money goes, check ten live URLs yourself, and put approval, disclosure and a no-network clause in writing. The best link building services make modest promises and show their work.