UserBoost Can You Do CRO Yourself Or Do You Need an Agency?
Yes, you can do conversion rate optimisation (CRO) yourself — but only if you can clearly identify real problems and validate whether they’re worth solving.
If you don’t have reliable data, enough traffic for testing, or a structured way to validate decisions, working with a CRO agency or specialist can help you avoid wasted time and ineffective changes.
For most businesses, the real issue isn’t who does CRO.
It’s whether you can validate it’s worth doing in the first place.
Because if the problem isn’t real, no optimisation will fix it.
Quick Comparison: DIY vs Agency vs Hybrid CRO
There are options when deciding on conversion rate optimisation. It’s not always practical to do everything, though. Here are some options:
| Approach | Best When | Main Risk | Outcome |
|---|---|---|---|
| DIY CRO | You understand your users, data, and prioritisation | Solving the wrong problems | Lower-cost improvements, slower learning |
| Agency CRO | You need expertise and structured optimisation | Paying for activity without real impact | More consistent, measurable progress |
| Hybrid | You want strategy externally, execution internally | Misalignment or unclear ownership | Balanced capability and growth |
The real problem with CRO (That most online advice misses) – not measuring results. This often fails because people don’t know what is actually broken, what’s worth fixing, and whether they’re solving a real issue. “People go around in circles making amends to a website that actually make absolutely no difference whatsoever.”
Why Most CRO Starts in the Wrong Place
Most do-it-yourself CRO starts like this:
- Spot something that “could be better.”
- Apply a best practice (at best)
- Hope it improves conversion
But that skips a critical step:
Is this actually affecting user behaviour?
Anyone can generate ideas even for the highest-converting websites in the world.
“AI will give you loads of advice… the problem is—how do you measure whether it’s a good thing or a bad thing?”
The real skill in CRO isn’t coming up with ideas.
It’s validating whether those ideas are worth doing.
The CRO Validation Loop (The Step Most People Miss)
Most people think CRO looks like this:
Ideas → Changes → Results
But that’s why so much optimisation fails.
1. Ideas (Easy)
Ideas are everywhere. From:
- Your team
- Agencies
- AI tools
But ideas are not the hard part. Ideas are easy.
2. Problem Validation (Critical)
Before acting, ask:
- Is this actually a problem?
- Is it affecting user decisions?
- Do we have evidence of friction?
Without this: You’re not optimising. You’re guessing.
3. Implementation (Where Time Is Spent)
This is where most effort goes:
- Redesigning pages
- Rewriting content
- Moving elements
But if the problem isn’t real, this effort doesn’t matter.
4. Measurement (Often Misunderstood)
Measurement isn’t just about proving something worked.
It’s about understanding:
- Did behaviour actually change?
- Was the change meaningful?
- Was it worth doing at all?
The Key Insight
Most CRO doesn’t fail because people can’t measure results. It fails because they never validated the problem to begin with.
The CRO Validation Loop
Ideas → Problem Validation → Implementation → Measurement
The Biggest Misconception: CRO = A/B Testing
A lot of advice assumes:
But testing only works if:
- You have enough traffic
- You’re testing the right thing
- You’ve identified a real problem
Most businesses don’t. Even when tests are run, they often validate ideas—not problems.
“You need a significant number of hits to your website to run A/B testing… we’re talking maybe at least 70,000 visitors a month”
So Can You Do CRO Yourself?
Yes (ish). But only if you follow a different approach.
Validate before you optimise
- Identify real friction
- Use data, behaviour, or feedback
Then implement changes
- Based on a clear hypothesis
Then measure impact
- Using appropriate methods for your traffic level
Without validation, the rest breaks down.
“You can do conversion rate optimisation yourself—as long as you know why you’re changing something.”
When It Makes Sense to Use a CRO Agency
A CRO agency isn’t just there to “do CRO.” It’s there to help you avoid solving the wrong problems.
A good agency helps you:
- Validate what actually matters
- Identify decision friction
- Prioritise effectively
- Measure outcomes properly
Most importantly, an agency logs ALL wins and losses so you can see a history of improvements and losses. We have worked with so many companies who know theyre conversions have dropped but have made so many changes they dont know which “broke” the system.
“You need a professional to help you track exactly what you’re going to change—and measure the improvement after.”
The Bottom Line
You can do CRO yourself. But most CRO doesn’t fail because of a lack of ideas. It fails because the problem was never validated in the first place.
CRO isn’t about making more changes. It’s about making sure the changes you make are worth making at all.
What next?
