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What an affiliate marketing supplier comparison means for English brands
How to run an affiliate marketing supplier comparison for an English brand in 2026, covering evidence, consumer law, partner directories and weighted scoring.
What to take away
- The CMA's consumer law guidance for online dating, published in 2023, shows how far promotional claims are policed, which is why supplier comparisons now start with evidence.
- Price alone rarely separates providers. Contract length and data ownership usually decide the outcome, along with how each platform handles tracking disputes.
- Directories from LinkedIn and Google give you a shortlist you can defend to finance and legal, rather than a list built on sales conversations.
- Score every supplier against the same weighted criteria, and keep the evidence file that supports your choice.
Why the ground shifted in 2026
Procurement for affiliate platforms used to run on feature checklists and commission rates. That is no longer enough. Consumer law duties now follow the content that partners publish, and the Competition and Markets Authority has said so in sector guidance.
The CMA's advice on complying with consumer law as an online dating service covers testimonials, pricing claims and endorsements. The same principles apply to any affiliate creative making a claim about your product.
That changes what you ask a supplier to prove. You need audit trails, disclosure controls and a clear owner for compliance, not just a dashboard.
The practical effect is a paper trail. Buyers now ask for approval workflows and evidence that a partner claim was checked before publication. Suppliers that cannot show a sample audit log rarely reach a second round.
Criteria that actually separate suppliers
Build your scoring sheet before you take any demo. Weight each criterion, then score every supplier on the same scale.
| Criterion | What good looks like | Weight |
|---|---|---|
| Tracking accuracy | Documented reconciliation process and dispute handling | 20% |
| Data ownership | You can export click and conversion data without a fee | 15% |
| Compliance controls | Disclosure tools and audit logs built in | 15% |
| Integration fit | Existing commerce and analytics stack supported | 15% |
| Commercial terms | Notice period, minimum term, overage rules | 15% |
| Support model | Named contact and response commitments | 10% |
| Roadmap clarity | Public release notes and change process | 10% |
Weights are illustrative. A subscription-heavy retailer might raise tracking accuracy to 25 per cent and cut roadmap clarity.
For a fuller picture of how these criteria map onto platform categories, read our guide to affiliate marketing tools and supplier options.
Scoring pitfalls to avoid
Two habits ruin a comparison. The first is scoring after the demo, when the strongest presenter has already framed your view. Score from written answers instead, then use the demo to test the claims.
The second is letting one criterion dominate. If tracking accuracy carries 60 per cent of the weight, the rest of the sheet is decoration. CAP any single criterion at 25 per cent, then revisit the weights later.
Where to find credible options
Start with directories you can cite. The LinkedIn Marketing Partners directory lists vetted technology providers by capability, which gives your shortlist an external source.
Google publishes its own performance guidance in the Google Ads best practices library, which is useful when you test how a supplier handles paid and affiliate overlap.
Check the corporate record as well. Companies House filings show ownership, filed accounts and any change of name, which matters when a supplier is small or recently restructured.
Beyond directories, ask each supplier for two references you can contact directly.
Running the comparison itself
Run a structured process. Issue the same written brief to every supplier. Require written answers to the same twelve questions, including tracking disputes, data portability and exit terms.
Score independently before discussion. Where scores diverge, record why. That record is what protects the decision if the relationship sours later.
Price should enter last. Convert every quote to a total cost over the contract term, including integration, migration and any per-click or per-order fees.
Close with a decision note. Record the winner, the runner-up, the scores and the reasons for any override. Finance, legal and the programme lead should sign it. A signed note turns a preference into a defensible choice.
If you need a deeper method for shortlisting and testing platforms, our walkthrough of affiliate marketing software selection in England sets out the sequence in detail.
Common questions
How many suppliers should we compare?
Three to five is workable. Fewer than three makes the scoring meaningless, and more than five slows the process without improving the outcome.
Should we include our existing supplier?
Yes. Score them against the same criteria. It surfaces contract terms you have drifted into accepting and gives you evidence for renegotiation.
What evidence should we keep?
Keep the brief, written answers, scores, references and the final decision note. Consumer law duties mean you may need to show why a claim or partner arrangement was approved.
How long should the comparison take?
For example, a team running a mid-market programme might allow six to eight weeks, with two weeks for reference calls.
