Zirra is a trading analytics company that uses unstructured data, data analysis, artificial intelligence, and natural language processing to produce trading signals. Its risk assessment and portfolio ranking and management solutions are based on complementary/alternative data, which includes anything that is not stock performance analysis or financial data reported by the company. Zirra's data is collected from hundreds of sources and then used to produce metrics for more than 20,000 public companies. These signals are clustered and scored under subject-matter categories.