Open source software is an increasingly important part of most organizations. Yet establishing sustainable business models to support open source development is a non-trivial problem because the product is effectively given away for free. Despite these challenges, a variety of companies have demonstrated that it is still possible to build a successful business around open source software projects. In this session we are going to explore the challenges and opportunities related to open source sustainability, including a candid and unbiased view into the mechanics of these fragile ecosystems.