I feel lucky that I saw an ad with proper api services. My husband and I did our full financial strategy with Dariusch and his team - from health insurance and pension to investments. After a year wor... See more
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As an expat navigating the complexities of the German system, you need strategies that go beyond the conventional. At Proper API, we empower you to maximise your financial potential by taking advantage of the available tax, real estate, and investment opportunities. We focus on intelligent financial structures that ensure both growth and security. With our guidance, you'll learn how to accelerate your income, make informed investment decisions and automate your wealth creation processes for long-term success.
Contact info
Mary-Anderson-Str. 6, 53332, Bornheim, Germany
- 0228 84 250 931
- mail@proper-api.de
- proper-api.de
Lukas took his time to explain…
Lukas took his time to explain everything to me in detail. He was also transparent.
Denis was a fantastic advisor
Denis was a fantastic advisor, going through a range of topics at my pace and knowledge level. He prepared a number of different analyses to showcase different scenarios and it was so easy to understand and select and make decisions that were best for my financial future. The whole team is easy to communicate with and feels like my finances in Germany are finally under control. Highly recommend Proper API to explain the complex system here, walk you through options for your financial future, and help you get there!
Great onboarding experience
Thank you Denis for being very patient and friendly and walking through all the details thoroughly. I liked the follow up calls, flexibility and depth of knowledge he had in the topics. I am very satisfied with the onboarding and now looking forward to continue with the experience.
Friendly and Professional Consulting
I'm working with Pierre and Deniz and so far I have learned a lot about the business and the process of buying a flat for investment. I'll update to again after I go through the whole process.
Customer centric, they offer what you actually need
I was quite skeptical initially because I have seen many similar advertisements, promising to make us rich by saving on taxes or buying properties without money. However after some meetings with Christian and investigating about the company, I was glad that I got a very good proposal, comprehensive, aiming to help me reach my goals, instead of just trying to sell random insurances. After reaching out to other similar companies, I prefer ProperAPI over the others because of their comprehensive end-to-end services and customer focused service. They offer to you what you need, not what they need to sell.
Great service
I contacted Proper-API due to an advertisement. Since I'm naturally skeptical about some kind of advertisements I took my time to ask questions and make a few researching. So far I am positively impressed by the service I got. Working with Christian and Pierre, I got my questions answered and got time enough to check everything without rush.
In conclusion, as an expat living in Germany, I recommend Proper-API's service in the realm of insurance and real estate investment.
Great Experience with Team API
I had a great experience working with Team API, they provided me with insightful information, which lead me to make right decisions about my Financials. My consultant Andre was really helpful and explained each steps in a detailed and simple way for me to me to choose the right financial product.
I recently had the pleasure of working…
I recently had the pleasure of working with André, and I couldn’t be more impressed. Throughout 5-6 sessions, he took the time to understand my personal goals and requirements deeply. His guidance helped me make smarter financial decisions and truly maximize my resources.
What I loved most was his approach. He was always prompt in responding, started every session with a helpful recap, encouraged me to ask questions, and ensured all decisions were aligned with my preferences. He consistently provided advice that was tailored to my best interests and always suggested what was right for me.
I transitioned to private health insurance, saving a significant amount on taxes. He also helped me secure the best deal for liability insurance and set up a reliable pension plan to protect my long-term financial future.
What’s even more remarkable is that all the consultations were completely free of charge. I didn’t pay any fees for private health insurance, liability insurance, or the pension plan. Andre’s understanding of the Indian audience and his practical, insightful advice make him a standout professional.
If you’re looking for expert financial guidance, I highly recommend reaching out to André. You’ll be in great hands!
All you need your financial advisors to be
Friendly, trustworthy, transparent, knowledgeable, all-rounded
Great experience with Proper API!!
The service provided by Proper API is truly professional and personal. The colleagues are fully engaged in your customer experience and provide clear and meaningful guidance. From strategies to questions, they deliver the best possible service.
Positive Start, More Limited Over Time
When I first started working with Proper API, I had a very positive experience. The initial phase felt supportive and consultative, and the guidance was genuinely helpful.
After about a year, my view is a bit more balanced. The service has become more transactional, with most interactions focused on relaying information or follow-ups rather than providing independent advice or proactive consulting.
Overall, the service is fine and I continue working with them, but I’d recommend starting with clear expectations around the level of long-term advisory support provided.

Reply from Proper API
Very quick and reliable collaboration
These people are experts in their fields and work well with expats whose German language is not their first language.
They have services for many types of investment opportunities, they help with minimizing taxes and costs and maximizing tax refunds.
They also help get the correct insurances that you need by getting the best premiums for the money you can afford.
A unique guide in Investments and Real Estate World
Company was suggested by some colleagues in the context of investments and real estate and I can happily say that was a really good suggestion.
Me and my wife we have been guided with patience, professionalism and really wide knowledge; we build together a plan to make our future safer not only looking on Investments but also on secondary steps that may help us to move ourself safer ( like additional insurances, additional agreements that we were definitively not aware of ); we were listened since day one and everything was build based on our necessities; all Proper APIs people that we are in touch with were ( and are ) super supportive and very friendly.
Purchasing an house and make proper investments have never been so easy!
Awesome deal!
I recently worked with Proper-API for investment consultations, insurance advice, and full support during my property-buying process, and I couldn't be happier with the experience.
Right from the start, the team was incredibly knowledgeable, professional, and dedicated to helping me make the best decisions. They walked me through different insurance options, ensuring I had all the protection I needed, and helped me assess whether the property I was interested in was truly worth the investment.
One of the best things about Proper-API is that their initial consultations are completely free. It really makes sense to take advantage of this, as it gives you a great chance to see what they offer without any pressure.
While there were a few delays in communication due to their high workload, it wasn’t anything that caused any real issues. Their commitment to providing excellent service and making sure I was happy more than made up for it.
Thanks to their support, I was able to secure a 6% discount on the property I purchased, which was a huge win for me. I’m confident I made a great investment, and that’s all thanks to Proper-API.
I’m 100% satisfied with my experience and will definitely be using their services again for my next property purchase. See you in a year guys!
Highly recommend
The financial consultation was excellent with Lukas. He helped me identify gaps in my knowledge and gave a clear advice on how to improve. I think his guidance will definitely take me in safer side of my future. Highly recommend.
Wonderful Experience
I had an excellent consultation service with the team. Andre took his time to create a personal investment plan for me, setup the accounts, and to my surprise, scheduled a follow up session to evaluate the performance of my portfolio thus far. The follow-up for me was customer-centric
Excellent Service and Financial Expertise
I had an exceptional experience working with Proper API, thanks to my financial advisor, André. His knowledge, patience, and professionalism stood out throughout the process. André took the time to understand my financial goals and provided tailored advice that was both practical and effective.
He was always approachable, clear in his explanations, and proactive in addressing my queries. I felt confident and well-supported at every step. Proper API and André have truly exceeded my expectations, and I wouldn’t hesitate to recommend them to anyone looking for reliable financial guidance.
Thank you for your outstanding service.
Great financial advisor firm in Berlin
I have been with Proper API for more than a year now, and they have been a great team. My advisor, Denis, has been a patient and friendly person to work with. He makes time to go through every details, multiple times if required, to help me understand the details of the process and next steps, as well as while introducing an investment opportunity.
I am happy with their service, and look forward to expanding my portfolio with the team.
Would advise any expat to work with Proper API
When working with Proper API, both sides share a common goal: come up with the best insurance/finance tools to support their clients´ wealth generation and protection. They use concrete facts, numbers, and analysis to support their proposals and guide your decision making. They also don´t rush you into making any decision and whatever other scenarios come along, they are happy to incorporate them. The monthly service has also been great, saving me time and giving me peace of mind to ask them whatever I need to know, when I need to know. Opportunity for improvement: sometimes it´s necessary to follow up on them or send reminders to check if there are any updates with an ongoing request (e.g. to an insurance company), however, nothing critical that can´t be improved.
5 out of 5 stars – Outstanding Wealth Management Service!
I recently had the pleasure of working with Proper API to purchase my first investment property for rental purposes, and I couldn't be happier with the experience.
From the initial consultation with Lukas to signing the contract and then collaborating with Pierre, the entire team provided exceptional support every step of the way. They helped me evaluate all my options over a 10-year horizon, considering tax benefits, cash flow, and overall profit. Their expertise made it easy to navigate the complexities of the German bureaucracy, including notary appointments, tax evaluations with an auditor, and property rental management.
What I appreciated most was their hands-on approach—perfect for busy individuals, so I did not have to get hands-on. Beyond visiting the property and attending the official notary appointment, I didn’t need to handle much else. They handled everything with professionalism and care, including negotiating with the seller (which worked out in my favor!) and ensuring the seller upheld their obligations post-sale. They also made sure that the property was rented out the same month as well.
Their property portfolio is constantly updated, offering a variety of options to fit your needs. There was no hard selling, and their patience throughout the process was commendable. They even helped me secure bank financing for the property.
I asked every dumb question I could think of to understand the process since this was my first investment. Pierre never seemed frustrated at my questions and took time to seriously explain everything and even followed up by email and whatsapp regularly.
Overall, Proper API exceeded my expectations. They provide an all-encompassing service that makes property investment seamless and stress-free. I would absolutely use their services again in the future. Highly recommended!
Note of advice to anyone using their services: buying a property takes a bit of time and patience. Things do not always move as fast and some things go really fast. So keep this in mind!
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