There's four kinds of intellectual property: Copyright, patent, trademark, and trade secret. Which of those did they violate? Is your business defensible? (Re

There's four kinds of intellectual property: Copyright, patent, trademark, and trade secret. Which of those did they violate? Is your business defensible? (Remember, APIs generally aren't protected by intellectual property. It's the implementation or patents that protect your product. For example, if copying your API violates your patent, then you have a case.) It should go without saying that these shouldn't be new concepts to anyone running a startup.