Micro Focus ArcSight fell from the Leaders to the Challengers section of the most recent Gartner Magic Quadrant (MQ) for SIEM, based on Gartner's concerns about how Micro Focus is integrating the former HPE product with its existing products, and licensing complexity. That said, the company has a large installed base of customers using the SIEM product for large, complex SOC environments and for more basic log collection use cases. It is also used by many managed security service providers (MSSPs). Read more.