Hasso Plattner is a cofounder of software giant SAP AG. Today he is Chairman of the Supervisory Board of SAP AG.
Together with Dietmar Hopp, Claus Wellenreuther, Hans Werner Hector and Klaus Tschira, he is one the founders of the software giant SAP AG. He was also chairman of the board until 2003 and is currently the chairman of the supervisory board.
Also in 1998, Plattner founded the Hasso Plattner Institute
for software systems engineering based at the University of Potsdam, and in Palo Alto, California, its only source of funding being the non-profit Hasso Plattner Foundation for Software Systems Engineering. Plattner has pledged 50 million euros of his personal fortune over a period of 20 years. Since its foundation, Plattner's commitment to the HPI has quadrupled to over 200 million euros. He not only fully finances the HPI, but is also actively involved as a director and lecturer in Enterprise Platforms and Integration Concepts 
In October 2005, with a donation of 35 million USD, Plattner founded the Hasso Plattner Institute of Design at Stanford University
Students of varying disciplines have been charged with the development of user-friendly innovations. Another of Plattner's pledges to promote science was of 10 million euros to redevelop the library at the University of Mannheim, Germany, given in 2003.
The venture capital fund HassoPlattnerVentures, set up with a starting balance of more than 25 million euros, was founded on July 1, 2005 in the German city of Potsdam with the goal of supporting young entrepreneurs in transforming their ideas into marketable products. SAP co-founder Prof. Dr. h.c. Hasso Plattner provides the lion’s share of this investment capital, along with InvestitionsBank of Brandenburg and CMEA Ventures.
Stanford University has recently launched the Hasso Plattner Institute of Design at Stanford (the "d.school").
On 2004-01-21, at a ceremony at the Hasso Plattner Institute celebrating the 60th birthday of its founder, German Chancellor Gerhard Schröder made the following comments on Plattner’s achievements: "We need more Hasso Plattners and more SAPs in order to get Germany moving again economically." According to the Chancellor, Plattner was able to create an international corporation that proved "that German companies can be at the top of the technological hierarchy worldwide". The Chancellor argued that Germany could learn a lot from the HPI.
In an interview in August 2004, the Munich-based management consultant Roland Berger named Hasso Plattner as one of the five Germans who have made the greatest impression on him. In the Welt am Sonntag article Berger pointed out how Plattner founded, built up and adapted SAP to a changing market was a "master achievement".
Plattner is said to be the 11th richest man in Germany with an estimated fortune of 5 billion USD, according to Forbes.
Alongside sailing the high seas, he is a keen golfer. He owns the Fancourt Golf Estate, near George, in South Africa.
, and it is suggested that this amount will have helped 360 000 people.In the spring of 2005, Plattner personally covered the costs of the 46664 benefit concert, which took place at on his golf course in George which is near Cape Town and which was broadcast globally on television. Proceeds went towards the former South African president Nelson Mandela's fund to fight AIDS/HIV.