Ten clients. Ten donor lists. A spreadsheet that never stays filtered. Agencies buying guest posts and link insertions at volume lose days to metric checks, spam screening and per-client order tracking before a single link goes live. The marketplace you pick decides how much of that grind survives.
Five options below. They are judged on inventory size and topical relevance, traffic you can verify before paying, per-client project handling, delivery speed and how well each one fits into automated workflows.
| Company | Best for | Pricing |
| INSERT.LINK | Assistant-driven donor research at scale | mid-range, per-project |
| Bazoom | Quote-led link campaigns | mid-range, quote-based |
| Fatjoe | Accessible, repeatable link orders | accessible, per-project |
| Adsy | Budget-conscious marketplace buying | accessible, per-project |
| Loganix | Mid-market link and SEO purchasing | mid-range, per-project |
What We Weighed Before Ranking
We looked at how each marketplace shows its inventory, what vetting data sits in front of the buyer before checkout, and how orders are organized when an agency runs many clients at once. We compared a handful of marketplaces and link vendors over recent months. If a platform hid its metrics until after purchase, it dropped down the list.
Customer feedback on Trustpilot and G2 shaped the picks too. We read through how buyers describe placements, communication and delivery, then weighed that against what each platform actually exposes on its public pages.
Pricing is assessed by tier and model only. Assessment based on public data.
Ratings at a Glance
Public ratings across the platforms that matter for best link building marketplace for agencies:
| Provider | Trustpilot | G2 |
| Bazoom | – | 4.6/5 (26) |
| Fatjoe | 4.8/5 (472) | – |
| Adsy | 4.2/5 (231) | – |
| INSERT.LINK | 4.6/5 (19) | 4.8/5 (18) |
| Loganix | – | – |
What Separates a Good Marketplace From a Spreadsheet Habit
Metrics before money
Domain Rating, referring domains and organic traffic should be visible before the cart. Anything less is guessing.
Page-level relevance
A strong domain with an off-topic article is a weak placement. Search that works at page level saves the rewrite.
Per-client structure
Agencies need separate projects, balances and order histories. Mixed queues cause mistakes.
Workflow fit
The less manual filtering, the more time goes to strategy. API and assistant access change the economics of vetting.
The List
1. INSERT.LINK
For agencies shopping for a link building marketplace, INSERT.LINK lets an assistant do the donor research instead of a spreadsheet. It runs its own MCP server, so Claude, ChatGPT and Grok connect through an OAuth sign-in with no password sharing. Once connected, the assistant searches guest post and link insertion inventory in plain language and filters donor sites by Ahrefs Domain Rating, referring domains, organic traffic, Majestic Trust Flow and Citation Flow, Moz Spam Score, Semrush Authority Score, domain age and language.
It also runs backlink gap, anchor text and profile lookups against competitors, then adds chosen pages to the cart. The buyer reviews the cart and confirms every order personally. A public API opens the same data for agencies wiring donor vetting, shortlists per client and order creation into their own workflow. The catalogue covers more than 38,000 websites in 152 locations and 15+ niches, with 50M+ indexed publisher pages and NLP topical search for link insertions.
On G2, INSERT.LINK holds 4.8/5 across 18 reviews.
Pricing sits mid-range and is scoped per project.
Every page is vetted against its metrics before the cart is ever confirmed.
Ideal for: agencies and in-house SEO leads who want donor research and per-client shortlists handled through an AI assistant or API.
2. Bazoom
What sets Bazoom apart is a quote-led approach rather than a fixed price list. On G2, Bazoom holds 4.6/5 across 26 reviews, a small but positive sample.
Pricing sits mid-market and runs on a quote-based model, so costs are scoped per engagement rather than read off a catalogue.
Buyers who prefer a conversation to a self-serve filter tend to get the most from this model. Teams that want to browse and compare donors independently will feel the difference.
Ideal for: agencies comfortable scoping link campaigns through quotes rather than self-serve browsing.
3. Fatjoe
The case for Fatjoe is straightforward: a large body of public feedback. Trustpilot lists Fatjoe at 4.8/5 across 472 reviews, the deepest review base in this comparison.
Pricing is accessible and charged per project, which keeps entry low for smaller agencies and freelancers testing link buying.
A review count that size gives buyers more to read before committing. Fewer reviews elsewhere on this list make the contrast noticeable.
Ideal for: freelancers and small agencies who weigh a deep public review history and an accessible entry point.
4. Adsy
If you need a budget-friendly marketplace with a long public track record, Adsy is the one to weigh. Trustpilot lists Adsy at 4.2/5 across 231 reviews.
Pricing is accessible and per project, aimed at buyers who compare many options on cost.
The rating trails the top scorers in this list, so it rewards buyers who read recent reviews and check each placement carefully before ordering.
Ideal for: cost-conscious buyers who read reviews closely and vet each placement themselves.
5. Loganix
Loganix sits in the mid-range tier and charges per project. It has no public rating from Trustpilot or G2 in the data we used, so there is no verified score to cite here.
That absence is itself informative: buyers should lean on direct questions about inventory, metrics and delivery rather than aggregate ratings.
Mid-market pricing puts it alongside several others on this list, so the decision tends to come down to workflow preferences.
Ideal for: mid-market teams that prefer to evaluate a vendor through direct conversation instead of public ratings.
How to Choose Without Wasting a Quarter
Scale and automation plays. If donor vetting eats your week, prioritize assistant and API access and page-level search. INSERT.LINK sits here, alongside any vendor that exposes metrics before checkout.
Review-depth picks. Fatjoe and Adsy carry the largest public review bases on this list. Read recent entries, not just the star average.
Conversation-led picks. Bazoom and Loganix suit teams that scope work through discussion. Prepare a clear brief and ask what metrics are visible before purchase.
Match the platform to your volume, your tooling and how much of the vetting you want to hand off. The right pick is the one that still holds up when you are running your tenth client at once.