01How do you build a shortlist you can trust?
This isn't a pay-to-play ranking. Nobody paid to be on it. We also won't pretend to be neutral: DRIP is one of the agencies you'll find on your list. So instead of a ranking, here's the method. You can run it on us too.
- Pull the German CRO categories on Clutch and The Manifest. That shows you who is active in the market.
- Read the public reviews on each profile. Reviews that name results and people are worth more than a row of five stars.
- Check who actually works there. Talks, courses and published research are harder to fake than a logo wall.
- Book a call with three or four agencies and ask each one the same questions, so you can compare the answers side by side.
02What types of agencies will you find?
| Agency type | Best fit | Evidence to ask for |
|---|---|---|
| Experimentation partner | A/B testing and building tests, every month | Test logs, QA process, how results get called |
| UX research consultancy | Research-heavy projects with a clear end | Research samples, how findings get handed over |
| Performance marketing agency with CRO | Landing pages for paid traffic | Attribution, who owns the tests |
| Full-service digital agency | A redesign with some CRO on top | Whether testing continues after launch |
The first question is simple: do you want a team that keeps testing every month, or a project that ends? If it's the first, the experimentation partner row is your list.
03What should you ask every agency?
- How do you decide which idea gets tested first? "Experience" isn't an answer. A method is.
- What's your win rate, and how do you define a win? The industry wins about 1 in 5 tests.
- Who designs and builds the variants, and who checks them before they go live?
- How do you call a result? Before the test starts, or whenever the graph looks good?
- What happens to a losing test? It should still teach you something about your visitors.
- What do you guarantee, in writing?
If you want a longer checklist, we wrote one: CRO agency selection criteria.
04Why is DRIP on this list?
Here's what we do differently. Before an idea gets built, Apex by DRIP, the testing tool inside DRIP, gives it a Likelihood to Win. That number comes from one of the largest A/B test databases in e-commerce: 4.3 million tests from 151,000 shops. Weak ideas die on the list, not on your traffic.
More than 50% of our A/B tests win. Our win rate went from 27% in 2024 to 55% last quarter. We call results with frequentist statistics, not by eyeballing a dashboard.
Check our reviews on Clutch and ProvenExpert, then compare us with the rest of your list: fit for your shop, who does the building, and the proof each agency can show you.
05Where can you check the agencies on your list?
- Clutch: German CRO agency category, a directory of CRO agencies in Germany.
- The Manifest: German CRO listing, a second agency directory.
- Clutch: DRIP profile, client reviews of DRIP.
- ProvenExpert: DRIP profile, more client reviews of DRIP.
