The CRO agencies in Germany we could verify with a German address and a published A/B testing or conversion optimization service are DRIP Agency (Traunstein), konversionsKRAFT (Bad Homburg), ConversionBoosting (Ludwigshafen), growganic (Remscheid), Convertlab (Heilsbronn), Klickkonzept (Frankfurt) and TRKKN (Hamburg).
DRIP Agency has the most results in our archive by far: 41 tests for brands such as SNOCKS, BLACKROLL, Giesswein and Kickz. konversionsKRAFT is the long-standing choice for large telecom, finance and retail programs.
How we picked: we checked each agency's own website and legal notice (Impressum) in November 2026 for a German address, a conversion rate optimization (CRO) or A/B testing service and public case studies, then searched our archive for tests credited to them.
We have not hired these agencies, and the order is not a ranking beyond putting the agencies with the most public evidence first.
| Agency | Based in | Best for | Known for | Tests in our archive |
|---|---|---|---|---|
| DRIP Agency | Traunstein, Bavaria | Ecommerce brands with €100k+ monthly revenue | SNOCKS: 350+ tests since 2019 | 41 |
| konversionsKRAFT | Bad Homburg, Hesse | Large ecommerce, telecom, finance and B2B programs | freenet: +30% orders, cumulative | None yet |
| ConversionBoosting | Ludwigshafen am Rhein | Teams that want testing plus tracking and training | CRO courses and certificates | None yet |
| growganic | Remscheid | Online stores that need clean tracking before testing | ARMEDANGELS: 80+ tests | None yet |
| Convertlab | Heilsbronn, Bavaria | Shopify brands in the DACH region | Written 5x ROI guarantee | None yet |
| Klickkonzept | Frankfurt am Main | Advertisers who want ads and landing pages from one team | point-rouge header test | 1 |
| TRKKN (Trakken) | Hamburg | Enterprises on Google Analytics and Google Cloud | Analytics Summit, Google partner badges | None yet |
If you're open to a team outside Germany
Most CRO work is remote: research, test builds and reporting rarely need anyone in the room.
Our featured practitioner, Oliver Kenyon, co-founded Conversionwise, which lists a headquarters in Bristol and an address in London on its contact page.
It is a UK agency, so expect English-language reporting and contracts in pounds or US dollars, with a one-hour time difference to Germany.
Oliver Kenyon has 100 results in our archive, including losses.
One mobile test put search at the top of the menu and Clearance first with a 60% off label, worth +$92,000/month.
Another replaced mega menu product images with category descriptions and a testimonial for +$151,192/month. See the full profile.
The 7 CRO agencies in Germany
1. DRIP Agency
Based in: Kolpingstraße 32, 83278 Traunstein, per its imprint. The company is Drip Trading GmbH.
What they do: A/B testing and CRO for ecommerce only, offered as "done for you" (DRIP runs the program) or "done with you" (your team runs it with DRIP's research).
The homepage lists 70+ staff, 4,000+ tests run and a minimum of €100k+ monthly revenue.
It also runs its own testing platform, Apex, and offers +10% more revenue in under six months or month seven onward is free.
Known for: the SNOCKS case study: 350+ A/B tests since 2019, more than 100 of them winners, which DRIP credits with €8.2M+ in added revenue and average order value growing from €29 to €51. These are the agency's own figures.
Tests in our archive: 41, on the DRIP Agency profile.
A '100% Merino Wolle' badge on Giesswein product pages reported +€232,500 a month.
At Kickz, replacing the cart page with a one-CTA cart drawer with upsells gave +14.2% RPU.
Not everything won: a more prominent money-back guarantee for a beauty tech brand lost, at -9.2% purchases.
Best for: direct-to-consumer brands in fashion, food, fitness and beauty with enough traffic to run tests in parallel.
Not for lead gen, SaaS or small stores: the revenue minimum rules out most young shops.
2. konversionsKRAFT
Based in: Seifgrundstraße 2, 61348 Bad Homburg v. d.
Höhe, per its imprint (konversionsKRAFT AG). Bad Homburg is on the edge of Frankfurt.
What they do: conversion optimization with A/B tests, personalization, relaunch safeguarding, loyalty work and training for in-house teams.
The site claims over 400 clients, naming mobile.de, ImmoScout24, Deutsche Telekom, Vodafone, ING and TUI Cruises.
It covers ecommerce, D2C, B2B, telecom, banking, travel and nonprofits.
Known for: the freenet case study, which reports +30% more orders, cumulative, and a test program that freenet now runs in-house.
Other published cases include +54% conversion rate in three months for The Female Company and +18.2% revenue from real-time personalization for computeruniverse.
Tests in our archive: none yet.
Best for: large companies, including lead gen and subscription businesses, that want a full program and help building their own testing team.
Not for small stores: the client list is weighted to big brands, and the scope suits companies with a dedicated digital team.
3. ConversionBoosting
Based in: Bürgermeister-Grünzweig-Str. 1, 67059 Ludwigshafen am Rhein, per its imprint (ConversionBoosting GmbH).
What they do: conversion optimization and web analytics since 2013, according to its homepage.
Work covers A/B testing, GA4 and Google Tag Manager tracking, consent-aware setups and copy.
It can bring its own A/B testing tool "without high extra costs" or work in yours, and says it avoids long lock-in contracts.
Known for: training. It sells eLearning courses with certificates and in-house seminars, with Haufe-Lexware quoted as a training client.
Co-founder Julian Kleinknecht is credited on the site with over 1,200 A/B tests.
Tests in our archive: none yet.
Best for: ecommerce and B2B teams that want an outside partner now and the skills to test in-house later.
Not for buyers who want published results first: the site leans on testimonials rather than numbered case studies.
4. growganic
Based in: Remscheid, North Rhine-Westphalia, according to its homepage (growganic GmbH).
What they do: conversion optimization and tracking for online stores and digital businesses, combining clean data, user research and A/B tests.
The site also offers free tools, including a significance calculator and a conversion rate calculator.
Known for: the ARMEDANGELS case study: over 80 tests with a win rate above 52%, across product pages, sizing, navigation and four country stores.
It reports a losing test too: sending shoppers to a category page after add to cart cut conversion rate 5% and ARPU 6.88%.
Tests in our archive: none yet.
Best for: international stores and hotel or travel sites (its case studies include Ruby Hotels and Motel a Miio) whose tracking needs fixing before tests can be trusted.
Not for companies wanting a large, multi-team agency.
5. Convertlab
Based in: Adlerstraße 2, 91560 Heilsbronn, near Nuremberg, per its imprint (Convertlab GmbH).
What they do: CRO for Shopify brands in the DACH region, using research and A/B tests under what it calls a Double Diamond CRO framework, according to its homepage.
Known for: a written guarantee of a 5x ROI within six months.
Client testimonials on the site include Pet Printed, which says Convertlab has helped with A/B testing since 2022.
Tests in our archive: none yet.
Best for: German-speaking Shopify brands that want a specialist.
Not for sites on other platforms, SaaS or lead gen.
Read the guarantee terms before you sign, since how ROI is measured decides what it is worth.
6. Klickkonzept
Based in: Olof-Palme-Straße 15, 60439 Frankfurt am Main, per its imprint (Klickkonzept GmbH).
What they do: a performance marketing agency, now "part of Cosmo5", with over 15 years of experience and an "AI-first" pitch, per its homepage.
Conversion rate work sits next to paid search and social rather than as a standalone testing program.
Known for: the point-rouge test, published as a VWO case study.
Tests in our archive: 1, on the Klickkonzept profile.
Adding three USPs to point-rouge's header bar gave +7.12% conversion, +19.24% revenue, in a three-week desktop-only test.
Best for: advertisers who want the people buying their traffic to also fix the landing pages.
Not for teams that want a dedicated, high-volume testing program.
7. TRKKN (Trakken)
Based in: Hamburg (Trakken GmbH, 20359 Hamburg), per its imprint.
What they do: a full-service partner for the Google Marketing Platform and Google Cloud.
Its homepage lists teams for digital analytics, conversion optimization, ad tech, advanced analytics and AI, cloud engineering and data strategy. It hosts an annual Analytics Summit.
Known for: analytics and Google partner work. We did not find a published A/B test case study on its homepage.
Tests in our archive: none yet.
Best for: large companies that need privacy-safe tracking, server-side tagging and testing tied into Google tools.
Not for small sites or buyers who want CRO as the main service.
How to choose
D2C and fashion brands with real traffic
DRIP Agency has the deepest public record of ecommerce test results, with 41 tests in our archive. growganic suits brands selling across several countries.
Shopify stores
Convertlab works only with Shopify brands. For more options, including agencies outside Germany, see our list of Shopify CRO agencies.
Enterprise, telecom, finance and lead gen
konversionsKRAFT has the broadest list of large clients outside retail.
TRKKN fits when analytics and data privacy are the main problem.
Teams building in-house skills
ConversionBoosting combines consulting with certified courses. konversionsKRAFT also offers training and reports that freenet took its program in-house.
Paid media first
Klickkonzept handles ads and landing pages together.
What to look for
- Published results with losses: agencies that show failed tests, as DRIP and growganic do, are reporting honestly.
- A clear primary metric: ask whether they judge tests on revenue per user, orders or add to cart; the significance math depends on it.
- Enough traffic for the plan: ask how many tests your traffic supports per month, and check it with a sample size calculator.
- Data protection: German buyers need a consent-aware tracking and testing setup that fits the GDPR.
- Who builds the tests: confirm whether design and development are in-house or subcontracted.
- Tool ownership: find out whether you keep the testing tool and the test history if you leave.
- Contract terms: look for short notice periods and read any guarantee closely.
Our guide to choosing a CRO agency covers the questions to ask on the first call.
What it costs
None of these agencies publishes a price list.
Most quote a monthly retainer based on scope and test volume.
Two publish terms instead of prices: DRIP Agency asks for €100k+ monthly revenue and offers month seven onward free if it misses +10% revenue in under six months, and Convertlab guarantees a 5x ROI in six months. ConversionBoosting says it avoids long contracts.
For typical price ranges and what changes them, see CRO pricing.
If you only want a one-off review, compare CRO audit services.
Real results from German-speaking stores
Most of these tests ran on German and Austrian ecommerce sites.
Contorion ran its test in-house; ClickValue ran the Dachfenster-rollo.de test.
DRIP AgencyDRIP AgencyDRIP AgencyWatch out for
- Agency-reported revenue: figures like "€500M+ in additional revenue" or monthly euro wins are projections from test results, not audited sales. Ask how they are calculated.
- Win rates without context: a high win rate can mean safe, small tests. Ask what share of wins were rolled out and held up.
- Small tests sold as big wins: the Dachfenster-rollo.de test above had about 2,000 visitors across three versions, so its lift is likely overstated.
- Bundled services: analytics or ad agencies may treat CRO as an add-on. Ask how many tests they ran last quarter.
Browse every agency in our archive on the CRO agencies page, or compare A/B testing agencies and ecommerce CRO agencies worldwide.