High Quality Content by WIKIPEDIA articles! ParAccel, Inc. is a vendor in the data warehouse appliance market category. Vendors in this category provide a purpose-built database management system used for data warehousing, business intelligence (BI) and analytic processing and, according to Hackathorn and White, there are varying degrees of data warehouse appliance ranging from a “native appliance” (tightly integrated software and hardware) to only software (without the hardware).