Mast Brothers chocolate started in 2006 when brothers Rick and Michael Mast began working out of their apartment in New York City. They have since expanded to a 2,000 square foot space in Williamsburg, selling their chocolate in over 120 stores and restaurants primarily in the NYC area. Their chocolate bars are created using organic and locally sourced ingredients from a single farm, focusing on transparency in their supply chain. While their handcrafted approach and commitment to sustainability provide strengths, Mast Brothers also faces threats such as global climate change and rising costs that could challenge their business model.