Best-in-class
According to Gartner, Best in class is defined as the superior product within a category of hardware or software. It does not necessarily mean best product overall, however. For example, the best-in-class product in a low-priced category may be inferior to the best product on the market, which could sell for much more.
[1]
Footnotes
[1] From the Gartner Glossary by Gartner