How to Evaluate a Conversion Rate Optimisation Agency UK-Wide

Picking the wrong optimisation partner costs more than money – it costs months of momentum. Here's the checklist we'd use ourselves if we were hiring a CRO agency, followed by how BSS Commerce stacks up against it.

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An 8-Point Checklist

1. Clear business goals first

A good agency asks what conversion means for your business before proposing anything.

2. Relevant expertise

eCommerce, and ideally your platform specifically, not generic marketing experience.

3. A defined process

Research and analysis before testing, not aesthetic changes based on opinion.

4. Transparent communication

Regular reporting, plain-language explanations, and involvement in key decisions.

5. Real tools, real usage

Heatmaps, session recordings, and A/B testing platforms used to generate insight, not just checkboxes.

6. Case studies that match your business

Evidence of results in your industry or with a comparable business model.

7. Transparent, flexible pricing

Clear packages that scale with company size and budget.

8. Built for the long term

CRO compounds over months, not a single sprint – the right partner plans for that.

Where BSS Commerce Fits

As a Shopify Premier Partner and Adobe/Magento Bronze Solution Partner with 14+ years in eCommerce, BSS Commerce is built around platform-specific execution rather than generic marketing playbooks, backed by ISO 27001 certification for data handling.

"We really can't find anything we disagree with or can expand on. The documents are detailed, cover all customer segments, and describe what we would presume a customer journey would be."Co-founder & Director, Horse Riding Equipment Retailer (UK)

FAQs

Should pricing be the deciding factor?

No. Compare what's included against the value delivered – a cheaper audit that misses root causes costs more in wasted development time.

What's a red flag when evaluating agencies?

Vague promises, no defined process, and a focus on aesthetic changes rather than data-driven findings.

Run This Checklist Against Us

We're also covered in the wider roundup of CRO agencies serving London and the UK if you want more names to compare against this checklist.

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