How to compare professional services marketing suppliers before you sign

What to take away

Comparison fails when the brief is vague. Two agencies quote the same monthly figure and deliver different work, so procurement defaults to the lowest number.

Who owns the work once the contract starts?

Decide whether you are buying capacity, judgement or both. Capacity means production volume; judgement means senior time on positioning. The two rarely sit in one contract at a sensible price. Ask each supplier to name the person who will do the work, not only the partner who pitched for it.

Name the accountable person on your side. Comparisons collapse when three partners each assume someone else reviews output, so agree one approval route.

What should the requirement document contain?

Set out deliverables, volume, timescales and the measures you will report. Add constraints: brand rules, sector restrictions, limits on claims, client consent before publication.

Include data handling. If a supplier will buy or enrich contact lists, you remain responsible for lawful use under UK GDPR and the Privacy and Electronic Communications Regulations (PECR), and the ICO's guidance on organisations using marketing services of data brokers sets out the checks expected of firms relying on bought data.

Add response times and the route for urgent requests. Slow answers on a live matter usually cost more than the monthly fee.

How do you shortlist without wasting weeks?

Suppliers arrive in different shapes: full-service agencies, small boutiques, PR or SEO specialists, freelancers and independent consultants. Decide which shapes your requirement suits before you compare anything, because a freelancer's day rate and an agency retainer are not the same purchase. A specialist usually wins on depth; a full-service team wins on breadth.

Score eight to twelve names on four filters: sector evidence, team continuity, data practice, contract flexibility. Cut to three and price the same written requirement.

For paid channels, test whether the supplier understands the platform, not just the pitch. Google's overview of Google Ads features helps you check a media buyer can explain targeting, bidding and measurement plainly.

If you are weighing an agency partnership, LinkedIn's resources for marketing agencies explain how agency arrangements work, which sharpens questions about access and billing.

Ask each shortlisted supplier for two references you can call, ideally firms of similar size facing similar constraints. A reference that only praises the account manager tells you little.

Which pricing model suits your firm?

Ask for a worked example. A team paying £400 a month for retainer hours should see how those hours map to named deliverables. Without that, the comparison is guesswork.

Price the same deliverables as line items so the totals are comparable. Expenses, third-party software and research costs belong in the schedule, not in a footnote added after signature.

What does implementation actually involve?

Run this sequence before signing.

Step eight matters most: set the review point early enough to correct course. Our professional services marketing tool implementation guide covers what to fix when a chosen system is live but adoption stalls.

Give each step an owner on your side and a date. Comparisons that stall usually have one name attached to every action.

How should you score and record the decision?

The chart above gives illustrative weights. Agree your own before you read a single proposal, and keep them fixed for every supplier. Mark each criterion on the same scale — weak, adequate or strong — then total the weighted marks so the arithmetic can be rerun. Where two scores are close, the recorded evidence for each mark decides, not the total.

Record the evidence for each mark in one line. A note naming comparable matters, the lead consultant and a confirmed start date survives scrutiny.

Where scores are close, write down why one supplier edged ahead. That sentence is what a partner reads first when they ask how the appointment was made.

What exit terms should worry you?

Check notice periods, ownership of created assets, access to ad accounts and analytics, and handover support. A supplier holding your domain access or campaign history controls your switching cost.

Ask what happens to data on termination and in what format it returns. A vague answer means pricing the migration yourself before signing. Agree who pays for the handover period and how long it runs.

Common questions

How many suppliers should we compare?

Three, priced against the same written requirement. More than four adds reading time without changing the decision.

Should procurement or marketing run the comparison?

Marketing defines the requirement and the measures. Procurement runs scoring and contract terms. Both sign the recommendation.

How long should a comparison take?

For a mid-sized firm, allow four to six weeks from brief sign-off to signature.

Can we start with a paid pilot?

Yes, if the pilot has a fixed scope, a named deliverable and a decision date.