Services
- - Conversion optimization (CRO)Guidance for your experimentation program, from idea to analysis. More experiments, better conversions and informed decisions.
  - Improve your experimentation programMake experimentation a structural part of your organization. We help teams grow with advice, support and training.
  - Product experimentationDevelop products that really work. Validate assumptions and make informed choices.
- - Qualitative researchUnderstand thresholds, motivations and behaviors of your users and discover the biggest optimization opportunities.
  - AutomationsSpeed up your optimization process with automations. Less manual work, more time for insight and strategy.
  - Process MiningDiscover hidden paths, bottlenecks and opportunities to improve the online experience, backed by data.
- See all services
Training
- - Training Conversion SpecialistWant to learn all about conversion optimization? In this training you will learn to test, analyze and optimize like a pro. From knowledge of A/B testing to psychology and UX.
  - Consumer Psychology TrainingTo improve the conversion rate of your website, online store or product, it is essential to understand your customers' drivers. During the Consumer Psychology course, you will learn five optimization strategies to take your CRO program to the next level.
  - Data analysis training for CROPractical training in which you will learn to analyze, validate and present data convincingly within CRO.
- - Incompany TrainingCustomized training for teams looking to grow in experimentation, validation and conversion optimization.
- View all courses
Customers and Results
- - How Bidfood used process mining to discover blind spots in customer behaviorWant to know how customers really move through your platform? Bidfood discovered it through process mining and targeted improvements to their blind spots.
  - A successful experimental program according to DPG MediaHow DPG Media is building a mature culture of experimentation with a strong team, smart tools and training.
  - How AW Lab took the first step toward a validation-driven culture
- - CRO at Beter BedWhat can you learn from 10 years of CRO at Beter Bed? Insights, pitfalls and how they firmly anchored their testing culture.
  - How NS builds a successful CRO strategy with Online DialogueRead how a large organization like NS laid the foundation for a successful validation culture. And grew from 27 to 145 tests in one year.
  - Learning-by-doing: 4 years of working together on VodafoneZiggo's CRO programHow VodafoneZiggo grew in 4 years from gut testing to a robust CRO program with 20 teams and a Center of Excellence.
- See all customer cases
Blogs
CRO toolkit
About us
- - TeamDriven specialists who learn by experimenting
  - EventsSharing knowledge and inspiring each other. We bring peers together to learn and grow.
  - Partners Online DialogueTools from our partners that help translate behavior and data into impact.
- - Get in touchInterested in our approach or a collaboration? We'd love to engage with you.
  - Sign up for the newsletterStay tuned for the latest news on CRO and experimentation!
  - VacanciesCome work at the agency for data-driven optimization.

Wij zijn op zoek naar een data-analist! Check de vacature.

Growth through understanding, testing and optimizing

Many organizations steer by feel. They have plenty of ideas, but lack the evidence to make the right choices. For 15 years, we have been helping organizations grow by really understanding customer behavior and making experimentation a structural part of the way they work.

Let's get acquainted

These clients are working with us on digital growth

Experts in data and experimentation

Making more impact with data and experimentation

You want to grow, work smarter and make decisions based on data. We help you do just that. Whether it's full-service conversion optimization, scaling experimental programs or supporting product teams, we provide structural optimization. We provide an approach that fits your organizational goals and makes it impactful.

View our services

Develop in data-driven optimization

Experimentation and data-driven work starts with the right knowledge. Our Academy offers training for all teams and specialties: CRO, product teams, data analytics and behavioral psychology. Whether you're just starting out or already experienced, we'll help you use experimentation smarter and more effectively. In addition to open training, we also offer in-company sessions, fully tailored to your team and organization.

View our courses

A proven track record in experimentation

Our approach does not go unnoticed. We have won multiple awards for our work in conversion optimization, experimentation and data-driven growth.

3x award winner at Experimentation Elite Awards 2025. Read more

Great results with our customers

Wondering what our approach delivers in practice? We help organizations grow with experiments, psychological insights and customer insight. See how we increase conversion, improve culture and improving customer journeys.

See more cases

PrintAbout

PrintAbout professionalizes CRO for international growth

Read how printing expert PrintAbout partnered with Online Dialogue to professionalize its CRO program and scale it to four countries. From Excel overview to a scalable framework, cross-cultural experiments and CRO as a core competency throughout the organization.

AW LAB

How AW Lab took the first step toward a validation-driven culture

Read how sneaker retailer AW LAB partnered with Online Dialogue to move to a validation-driven culture. From projects to continuous optimization based on customer insights, data and experiments.

Vattenfall

Setting up Customer eXperience Optimization at Vattenfall

Together with Online Dialogue, Vattenfall developed a broad-based CXO program. Data-driven working was successfully added to their customer-centric approach. With a strong process, internal ambassadors and smart tooling, CXO was anchored organization-wide. The result: more insight, better collaboration and structural improvement of the customer experience.

Bidfood

How Bidfood used process mining to discover blind spots in customer behavior

Bidfood used process mining to find surprising customer insights and improve its CRO program. Read how this made an immediate impact.

Dutch railroads

How NS builds a successful CRO strategy with Online Dialogue

Dutch Railways (NS) transports millions of passengers every day and is a crucial link in the mobility of the Netherlands. How do you build a strong experimentation and validation culture within such a large organization? Together with Online Dialogue, NS took big steps: from a pilot program to more than 145 experiments in one year.

DPG Media

A successful experimental program according to DPG Media

DPG media is the largest media company in the Netherlands. Through radio, television, newspapers, magazines, sites, apps and podcasts, they bring out news and entertainment. A dynamic field of work, but what about the culture of experimentation at one of the largest publishers in the BeNeLux?

Better Bed

CRO at Beter Bed

We started at Beter Bed in 2014 and since then we have made great strides together, conducted interesting tests and most importantly gained wonderful insights about Beter Bed's visitors. How has Beter Bed developed in terms of CRO over the past few years? What were the obstacles and successes? What does their process look like? And what are the next steps?

EQOM

A successful CRO program at EQOM

EQOM has focused tremendously on CRO in recent years. EQOM is the European market leader in erotic products. The team has grown enormously in these years and, as a result, so has the number of experiments. So a huge growth, but how did they do this? How were we able to play a role in this? And how will they continue?

Vodafone-Ziggo

Learning-by-doing: 4 years of working together on VodafoneZiggo's CRO program

Learning-by-doing: how together we took VodafoneZiggo's CRO program to the next level. Their CRO program consisted mostly of gut feeling testing, but that has changed tremendously over the past 4 years....

Printing Deal

Data-driven redesign

In early 2020, we helped Drukwerkdeal.nl validate their redesign. Both the backend and frontend received a major upgrade. In 2023, they won the Experimentation Culture Awards. To provide insight into our work process and the redesign project, we asked Drukwerkdeal a few questions.

Zolemba

The award winning redesign of Zolemba

Because the homepage was not reaching its potential, Zolemba approached us to perform a technical check, data analysis and behavioral analysis on their website. Based on this, we created a redesign of their homepage for both zolemba.de and zolemba.nl.This case was awarded an Experimentation Elite Award for Best Business & Industry Experimentation Campaign.

KPN

KPN Case study: two years of A/B testing at KPN

Two years ago, we went to work for KPN to help with the data-driven optimization of their web shop environment. We started up not one, not two, but four A/B tests per week. This was the start of a long and valuable collaboration, with great results and many learnings as a result.

Beerwulf

Insights into online beer sales at Beerwulf with behavioral analysis

Beerwulf came to us asking if we could help map the behavior of their visitors. They wanted to understand their visitors better, but did not have a psychologist on staff. And besides, partly due to their explosive growth, they could use a fresh perspective.

Van der Valk

10 Years of Van der Valk & Online Dialogue

Since 2009, we have been A/B testing Van der Valk's websites to increase online returns. Testing has taken Van der Valk's websites very far and continues to do so to this day. It is rare that we do not have a test live on the Van der Valk websites.

Our latest insights

Learn more about CRO and experimentation in our blogs. We share practical tips and real-world examples to help you get more out of your digital platform.

See all blogs

16 March 2026

Dialogue Donderdag #50: van CRO naar klantreisoptimalisatie

Op donderdag 12 maart vierden we een bijzondere mijlpaal: de 50e editie van Dialogue Donderdag. Wat ooit begon als een kleinschalig initiatief om vakgenoten samen te brengen rond conversie en experimenteren, is uitgegroeid tot een vaste ontmoetingsplek voor professionals die werken aan digitale groei, klantbeleving en organisatieontwikkeling. In 50 edities van CRO naar klantreisoptimalisatie. Lees meer.

Maud Vermeulen

5 March 2026

Why experimentation is becoming an operating model for smart organizations

A conversation with Valentin Radu, founder of Omniconvert, on experimentation as an operating model, AI and sustainable digital growth. Read more