"First of all, Square21 obviously has a team of highly skilled professionals. Besides, their approach is very flexible, very agile. They are focus and make an effort to really understand InterChange's needs."

"I’ve worked with several development teams before, and the team at Square21 was definitely one of the best. They are well-prepared, continuously improving, proactive, and flexible. On top of that, they are great individuals on a personal level as well, which plays a key role in ensuring that even under tight deadlines, projects can be delivered smoothly and successfully."

"I have worked with Daniel and Adam for many years as CTO for PrimeTradingFund, a Dutch hedge fund. They had a high work ethos, were always ready to improve, handled deadlines well, and added significant value to our fund."