Customer ratings
Learn first-hand how companies are successfully using HubSpot by working with Growth Ninjas. Our customers report measurable results, more efficient processes and sustainable growth.
Over the past three years, I’ve had the privilege of working with the Growth Ninjas team on many different projects. Among other things, we’ve completely tailored our CRM and CMS to our specific use case and connected them to our community platform through a custom integration. What makes this collaboration special for me is that the team isn’t just strategically strong and technically competent—they’re also honest, incredibly dedicated, and always solution-oriented. It’s a partnership on equal footing where you can really feel that we’re working together to find the best solution—all with a generous dose of camaraderie.
We at MUMAK Medien GmbH (mumak.me) are working with the Growth Ninjas to build and further develop our HubSpot structures—and we’re very satisfied with the collaboration. What particularly impresses us is their combination of in-depth HubSpot expertise, strategic understanding, and pragmatic implementation. The Growth Ninjas don’t just think in terms of individual features or tools; they first seek to understand our business model, our processes, and our goals. That’s exactly what’s particularly important to us as a fast-growing digital financial media platform. The collaboration is professional, straightforward, and solution-oriented. Questions are answered quickly, complex requirements are explained clearly, and together we translate them into practical solutions. At the same time, we feel that they’re not just “setting up HubSpot,” but rather creating a structure that can grow alongside MUMAK. We particularly appreciate the direct communication, the high level of technical expertise, and the willingness to seek out the best solution—even for custom requirements. For companies that want to use HubSpot not just as a CRM, but as a central platform for marketing, communication, automation, and growth, we can wholeheartedly recommend the Growth Ninjas. 5 out of 5 stars—thank you very much for the great collaboration! Richard Dobetsberger MUMAK Medien GmbH | mumak.me
Our partnership with Growth Ninjas has completely transformed our HubSpot setup and enables us to effectively leverage the platform across all our sales and marketing activities. From the very beginning, the team quickly understood our core needs. What began as a service contract has evolved into a genuine, success-driven partnership. We greatly value their expertise, responsiveness, and clear focus—and we highly recommend Growth Ninjas to anyone who wants to get the most out of their HubSpot investment.
Growth Ninjas provided us with excellent support during the CRM implementation. The collaboration was professional, structured and very solution-oriented right from the start. What was particularly positive was how quickly the team understood our requirements and turned them into a practicable solution. In addition, they were highly reliable, responded quickly and were really pleasant to work with. A clear recommendation for anyone looking for a strong partner in the field of CRM and process optimization.
From the very beginning, the collaboration was very pleasant with the necessary drive and professionalism. We focused our collaboration on custom APIs and reporting. Viktor deserves a special mention from the team, who provided us with reliable support and results on a weekly basis.
Services offered
Stefan and his team supported us extremely successfully in the implementation of our CRM setup. The fast, uncomplicated cooperation and the team’s high level of technical expertise are particularly noteworthy. Our specific use case was quickly understood and efficiently mapped in HubSpot.
Services offered
From start to finish, working with Growth Ninjas GmbH was a great experience. The CRM implementation, sales & marketing alignment and HubSpot onboarding went smoothly. The team is not only competent, but also very pleasant to work with. An absolute recommendation!
Services offered
We have had HubSpot for 5 years now and have only ever used about 30% of it. After I asked HubSpot for help, I came across Growthninjas, and since then I think we’ve been using it to its full potential. Many thanks for the great help and good cooperation!
Best regards Paul Kohlstock
Managing Director of KHTC-Consulting GmbH
Services offered
The collaboration with Stefan and the Growth Ninjas was efficient and professional. They really went the extra mile, especially when creating our landing pages in HubSpot. They immediately understood our wishes/requirements and implemented the pages at lightning speed and in great quality. It was immediately apparent that they knew their way around HubSpot and were also familiar with the financial sector. As a result, communication and implementation ran smoothly and we are very satisfied with the new, optimized landing pages. We can therefore recommend the Growth Ninjas unconditionally for all HubSpot topics.
Services offered
Expectations were more than exceeded. Growth Ninjas not only helped us with the migration and implementation, but also took over the on-boarding with our sales and set up and trained us in important functions such as sequences, mailings, templates, etc. I would recommend them 100% and work with them again and again.
Thank you. RP
