Scoring ecommerce SEO suppliers on evidence before price: a method and worked example

Store shape : The catalogue, site structure, market reach and business priorities that determine what a supplier must address.

Evidence object : A report, audit extract, reference or other item that lets a buyer verify a supplier's claims.

Weighted score : A score out of five for each criterion, adjusted to reflect the store's priorities.

Scope : The agreed work, outputs and reporting expected from a supplier.

Account control : Ownership and administrative access to the store's analytics and search accounts.

Tool pass-through : A separate charge for software or licences supplied alongside the service.

Break clause : A contract term that allows the retailer to end the arrangement at an agreed point.

Disqualifier : A warning, such as a guarantee of rankings, that should stop the evaluation.

Store shape sets the scope

Store shape should determine the brief: define the changes the business needs over the next twelve months before inviting suppliers. A retailer with £1.2m in online turnover and 4,000 SKUs may prioritise indexation or category architecture, while a 40-product shop may need product schema or broader content coverage.

Describe the ecommerce site structure, the problems already known and the outcome required. Specify whether the work concerns crawl and index issues, category pages, product snippets or content. The brief should make the intended work clear enough that each bidder can propose a comparable scope, rather than a different interpretation of the need.

A shortlist of three to five suppliers is manageable for consistent assessment. Fewer choices give you less basis for comparison, while a longer list can make scoring harder to apply evenly. Use comparison approaches to structure the evaluation, but keep the brief anchored in the store's own requirements.

Supplier class narrows the shortlist

Match the supplier's operating model to the store's requirements. Specialist store agencies include Impression, Blue Array and The SEO Works; generalist digital agencies include Croud and Jellyfish; freelancers and consultants include Judith Lewis and Areej AbuAli. A supplier's category is a starting point, not proof that it fits your brief. This article does not score those named firms. It gives you the rubric to score each one from the evidence it sends you.

Generalist agencies may combine paid media and design with search work, which can leave less focus for SEO. Freelancers can offer value, but the work may depend heavily on one person. Ask every bidder to describe a technical problem they resolved for a store similar in size and complexity to yours.

Use a supplier shortlist to identify candidates, then read the tools and supplier guide before finalising the brief. Public rates are uncommon, so request a fixed-scope first quarter rather than assuming that a supplier's category or reputation predicts what the work will cost.

The table is a market map, not a ranking: it records how each supplier presents itself, and none of these rows carries a score. Confirm each firm’s current offer on its own site, then score the evidence it sends you using the 0 to 5 scale below.

For a supplier you are considering for Shopify work, confirm the relevant listing in the Shopify partner directory. If your store relies on seasonal trading, ask how the supplier will cover December and January, so the service remains available during those periods.

Evidence object turns claims into checks

An evidence object should let you examine a supplier's work rather than rely on a sales description. Request a redacted monthly report from a comparable store, a technical audit extract that shows how crawl and index problems are diagnosed, and named references you can contact about the supplier's delivery.

Use the technical audit extract to check whether the proposed diagnosis is specific to your store. Ask what each recommendation is intended to change and how the supplier will measure the result. A sample report should make the planned evidence and reporting cadence visible before you sign.

Confirm who has admin access to Search Console and analytics, and get written agreement that owner rights return to your business at the end of the contract. Check that the measurement plan respects consent and records Google Analytics permissions.

Weighted score reflects store priorities

A weighted score should reflect the store's shape, not a universal formula. Score technical, content, measurement and commercial terms out of five, then apply weights that match your main needs. The scoring method helps make those judgements consistent across bidders.

Each criterion needs a written scale, so the same evidence earns the same score for every bidder. A 5 means a verifiable item from a comparable store plus a reference you could contact. A 3 means a real item that is not comparable, or no reference. A 1 means a claim with nothing to check. A 0 means the supplier declined to show anything.

Here is a purely illustrative example for a 5,000-SKU shop, using two invented bidders rather than any real agency. Supplier A scores 4 for technical, 3 for content, 4 for measurement and 3 for commercial terms. Supplier B scores 5, 2, 3 and 4. With weights of 35, 20, 25 and 20 percent, A totals 3.60 and B totals 3.70, so B leads overall even though A is stronger on content and measurement. Only after this step do you bring in price.

Search Console's Performance report can support the measurement discussion, but rankings alone do not establish business impact. Ask how the supplier will report revenue and conversion data, and how it will distinguish the work from other influences. The evidence should let you judge whether the proposed method matches your needs, rather than treating a dashboard as proof by itself.

Tool pass-through clarifies total cost

Tool pass-through charges should be separated from service fees so the full cost is visible. Ask for a fixed-scope first quarter, followed by a rolling retainer if delivery meets expectations. A commercial due diligence check can help test the supplier's proposal before the business commits.

As a guide, UK ecommerce SEO retainers start around £1,500 per month for a single-category store and can reach £6,000 or more for complex catalogues with multi-market needs. Most named suppliers do not publish rates, so ask for a written quote tied to the scope rather than comparing headline fees without knowing what they include.

Ask whether crawling, rank tracking or analytics licences are resold at a margin, and request the underlying list price. Put each tool on its own line and compare the total over twelve months. A £1,500 monthly service with tools included may cost less overall than a £900 service plus £700 in software licences.

A three-month break clause and a named account lead make the first stage easier to assess. Procurement teams in England often ask for a break clause and clear data ownership terms. Put the scope, reporting cadence and any contract management responsibilities in writing so expectations do not depend on verbal assurances.

Account control protects continuity

Account control means the retailer keeps administrative access to Search Console and analytics during the relationship, with owner rights returned at its end. Specify this in the contract, alongside data ownership and the supplier's responsibilities for documentation, so a change of provider does not leave the store without access.

Include the named contacts, scope, reporting schedule, ownership terms and exit arrangements in the written agreement. Clear accountability and governance matter when the supplier works alongside an in-house team; confirm whether it will support existing staff or expects to replace their work. These terms help make the service and its handover assessable.

Disqualifier signals when to stop

A disqualifier is a reason to stop assessing a supplier, not a minor gap to overlook. Guaranteed rankings, refusal to provide a case-study contact, or an inability to explain measurement of incremental revenue all warrant caution. Treat claims about AI content carefully when product descriptions must remain accurate.

Ask to see the month-one reporting template and check that it includes revenue and conversion data, rather than keyword positions alone. Confirm how the supplier will collaborate with your in-house team and who retains the accounts, data and documentation at contract end.

A specialist agency is not essential for every shop: a smaller store may suit a content-led generalist or an experienced freelancer, while a large or complex catalogue may need specialist experience. Before signing, require a defined scope, named contacts, reporting cadence, data ownership terms and an exit clause, then compare price only across offers that meet those requirements.