How to Vet Link Building Companies Before You Hire One

"Link building companies" is one label on several different businesses. An outreach agency that pitches editors, a marketplace that sells slots on a list of sites, a service that inserts links into old articles, a press-release wire, and an operator running a network of sites it owns can all describe themselves the same way, show similar case studies, and quote similar prices. What they deliver is not similar at all, and neither is the risk each one hands to your site.

bklink's public sample report shows how far apart the label and the delivery can be. It audits 173 placements bought through a press-release distributor. Of the 173, 161 were the same two articles republished, none of the links was followed, 70% of the publications shared server infrastructure, and the estimated value of the whole list was $0. The buyer had a report showing 173 links. What they had bought was two press releases and a syndication footprint. You can read the full sample report.

Vetting a link building company is mostly working out which kind of company it is before you pay, then checking a small order before you scale. This guide covers that first stage. Once you have a shortlist, backlink provider analysis covers the deeper evaluation of one vendor.

Five businesses that all call themselves link building companies

Most vendors are one of these, or a blend. The label on the website rarely tells you which. What they are willing to show you does.

Outreach agencies

An outreach agency pitches editors and site owners and earns a placement: a guest article, a resource-page mention, a quote in a story. Done properly, it is slow and labour-intensive, the sites are not chosen from a price list, and the agency cannot promise a specific publication in advance. What you receive varies by campaign. The honest version will tell you that.

Guest post marketplaces and inventory sellers

A marketplace sells placements from a list: pick a site, pay the listed price, get an article with your link. The list is the product, which makes it easy to compare prices and hard to judge quality, because the same sites are sold to every buyer on the list. The compliance question is direct. Google's spam policies name "exchanging money for links, or posts that contain links" as link spam when those links pass ranking credit. Paid placements are fine when the link is qualified with rel="sponsored" or rel="nofollow", which also means they pass no ranking credit.

Link insertion (niche edit) sellers

An insertion seller adds your link to an article that already exists, usually one that already ranks or has links of its own. It is sold as buying into existing authority. When Ahrefs researched the paid-link market, the niche edits it was quoted averaged $361.44, against $77.80 for paid guest posts. You are paying for the host page more than for anything written about you, so the host page's history is what you are buying.

Press-release distribution services

A distribution service writes or takes your release and pushes it to a wire, which republishes it across many sites at once. The result is one article in many places, usually on pages whose links are nofollow or stripped. Google's spam policy specifically lists "links with optimized anchor text in articles, guest posts, or press releases distributed on other sites". Distribution has real uses, such as announcements, coverage and wire pickup. A link building channel is not one of them, and the PR distribution agency audit shows what a placement list from one looks like when checked.

Network operators

Some vendors own the sites they sell. Many of those sites share hosting, templates and ownership, which is what a private blog network is. From the outside they present as a catalogue of independent publications. From a DNS lookup, many of them resolve to the same server. That shared infrastructure is the footprint a PBN footprint scan looks for, and it is the one thing a vendor running a network cannot fix after the sale.

What the pricing model tells you

How a company charges tells you what it is optimising for, and which question to ask next.

Per link. A fixed price per placement pays the vendor for volume, so pin down what "a link" means. Is it followed or nofollow? Is it on a page that is indexed and reachable? How long is it guaranteed to stay, and what happens if it disappears? A price per link with no definition of a link is a price for a line on a spreadsheet.

Monthly retainer. A retainer usually buys time, not placements. That can be the right structure for real outreach, as long as the contract says what the time produces and what you see each month: live URLs you can open, not a count.

Packages priced by an authority score. "DR 50+ package" sounds precise and often is not. Ask which metric it is, from which tool, measured when. Domain Rating is Ahrefs' metric and Domain Authority is Moz's. A marketplace's own score is neither, and a vendor who blurs them is telling you how carefully the rest of the package was assembled. Link building services accountability covers what an honest authority claim looks like.

Prices far below the market. Ahrefs' research, citing Authority Hacker's survey of 755 link builders, put the average paid link at $83. A package that delivers "high-authority" placements at a fraction of that is either selling nofollow syndication, selling its own network, or losing money on every order. For what a link should cost, see backlink pricing evaluation.

Red flags before the first call

None of these proves a company is bad. Each one is a reason to ask a harder question before you pay.

• Guaranteed rankings. Nobody controls rankings. A guarantee is a sales claim with a refund clause, or without one.
• "Permanent" links with no replacement terms. Links decay. A vendor who promises permanence and does not say what happens when a link goes is promising nothing.
• A site list with names but no URLs. "Placements on 200+ news sites, DA 50+" cannot be checked. A list of live URLs can.
• Samples only after payment. A vendor with real placements can show you ten from last month before you buy.
• "All links dofollow" on openly paid placements. For sponsored content, that is a promise to do what Google's policy calls link spam, made on your behalf.
• Authority scores with no source. Any number that is not labelled with its tool and date is a number you cannot compare.
• Reports made of screenshots. A screenshot shows that a link existed once. A URL you can open shows whether it exists now.

Questions to ask before you sign

Send these in writing. The answers matter, and so does whether you get them.

1. What type of placement will I receive: earned editorial, paid, inserted into an existing article, or syndicated?
2. Can you send ten live URLs from placements made in the last 90 days, of the same type you are selling me?
3. Which authority metric do you quote, from which tool, measured when?
4. Are paid placements marked rel="sponsored"? If not, why not?
5. What happens if a link is removed, changed to nofollow, or the page stops loading within six months?
6. Do you own or operate any of the sites you place on? Do any of them share ownership or hosting?
7. What will your report contain: URLs I can check myself, or screenshots and counts?
8. Can I cancel after a pilot order without a long-term commitment?

An outreach agency should have no trouble with any of these. A marketplace should answer questions 1, 3, 4 and 7 plainly. A network operator will struggle most with question 6.

Run a paid pilot before you scale

Every answer above is a claim. The pilot is where the claims get checked. Place a small order, five to ten placements, and check every URL yourself before the second invoice:

• Is the link there, and is it followed? Open each page. Confirm the link exists, points where it should, and carries the attribute you were sold.
• Does the page load for anyone? A page that times out or returns an error delivers nothing, whatever the report says.
• Are these different sites or one operator? Resolve each publication to its server. Several "independent" sites on one address are one purchase.
• Are these different articles? Syndicated copies of one piece count once, not once per site.
• Does the price still make sense? Compare what you paid with what comparable links sell for.

This is the audit bklink runs: upload the placement list the vendor sends you, and it fetches every page live, records the follow state, groups publications by the server they share, flags syndicated copies and estimates what the list is worth. It is priced per audit, with no subscription, so a pilot costs one audit. Whatever tool you use, the rule is the same: check the pilot against what was sold, then decide.

Check again at 30 and 90 days. Links placed to pass a review can be removed or stripped once the invoice is paid, and a renewal audit is much easier when you have dated evidence of when that happened.

A shortlist scorecard

Where this fits

This guide gets you from the label "link building company" to a shortlist and a checked pilot. After that:

• Backlink provider analysis evaluates one vendor's whole operation: portfolio footprint, contract clauses and compliance.
• Link building services accountability sets the four obligations to hold any vendor to.
• Buy backlinks safely is the checklist for a single placement.
• Link building packages: what to audit before you renew covers the review at renewal time.

Related reading

• PR Distribution Agency Audit: The Placement List Truth: what a distributor's placement list looks like when every URL is checked.
• PBN Footprint Scanner: A Technical Playbook: how shared hosting across a vendor's sites is detected.
• Backlink Pricing Evaluation: What a Link Should Cost: the price side of the pilot check.