|Storage model||Columnar (?)|
|Available gratis?||No (only toy version)|
|In active development||Yes?|
|Focus of intended use||Large-scale analytics|
|Kind of data||Relational?|
Vertica was a commercial initiative of researchers Michael Stonebraker, Andrew Palmer and others. Initially the DBMS was developed by an independent company, also called Vertica; but it was sold to HP in 2011, and is now part of HP's Haven platform.
It's famous for keeping different copies of the same column in memory/storage, in different orders [TODO: Reference for that?]