Abstract
The MATLAB Reservoir Simulation Toolbox (MRST) is a unique research tool for rapid prototyping and demonstration of new computational methods for flow in porous media. The software has a large user base all over the world in both academia and industry. My group is also one of the key contributors to OPM Flow, the world's first open-source reservoir simulator aimed at full industry use. In the talk, I will briefly describe the two, compare and contrast their development and ownership models, and outline some of the factors that have contributed to their current success.