Compare SEO agencies by implementation capacity and evidence

Score the proposal against available capacity

When a small international growth team compares SEO proposals, the scarce input is usually implementation time: engineering, content review, analytics access, localisation and approvals. Ask every provider to work from the same constrained brief and make the dependencies visible. A polished strategy deck is not comparable with a released change, so define the evidence that will count before comparing monthly fees.

Ask each candidate to prioritize a short example backlog using the same constraints. Compare what they defer and why, not just what they promise to deliver. A credible provider should be willing to remove low-value work when capacity is limited.

Document the definition of done for each work type: deployed code checked on representative URLs, approved content published, or measurement configured and validated. Keep strategy documents as inputs rather than counting them as completed implementation.

Use the same constrained backlog exercise

Give each bidder a short set of real issues and the same implementation constraints. Ask what it would ship first, what it would defer and what evidence could change that order. Compare the reasoning rather than the number of recommendations. This reveals whether the provider can collaborate with a delivery team or expects the client to absorb an unlimited queue of work.

Price advisory and implementation work separately

Clarify whether the fee covers research, writing, engineering, QA and release support. If your team handles implementation, estimate the internal time before comparing proposals. Ask how the agency responds when a recommendation proves technically expensive. A good scope allows the team to revise a plan using new evidence instead of treating every departure from the original audit as an extra project.

Make handover a routine artifact

Keep accepted tickets, source notes and change logs in a workspace the organization controls. A new engineer or editor should be able to understand why a change was made. Require the agency to document unresolved assumptions and verification results. This reduces the cost of changing staff or suppliers and makes quarterly review more concrete than a presentation summarizing activity.

What to put on the comparison sheet

On narrow screens, scroll the table to see all columns.

Translate each workstream into an acceptance test

For a technical fix, require affected URLs, the intended change and how it will be checked after release. For content, require the buyer question, source material, editorial owner and publication responsibility. For reporting, require metric definitions and access to the underlying data.

Clarify whether the agency can make changes or only advise your internal team. A recommendation dependent on six weeks of engineering time has a different delivery risk from a change the provider can implement. Put those dependencies on the comparison sheet rather than hiding them in meeting notes.

Inspect how the provider handles risk

Ask about staging, approvals, redirects, important templates and rollback responsibility. A traffic-sensitive migration deserves a different level of review from a paragraph correction. Keep ownership of accounts, domain settings and published assets explicit so changing providers does not interrupt operations.

Google advises caution with promises of guaranteed rankings and recommends understanding what an SEO intends to change. Ask the team to explain its reasoning in plain language. Refusing to reveal the work because it is a secret technique prevents you from assessing both effectiveness and risk.