Periscope Data cofounder here. I wouldn't say we're "allergic" necessarily. ;) Like a lot of startups, we're very young and haven't gotten around to building out the website as much as we'd like to.

`jplitz and `ajones are right. As of now we support MySQL, Postgres, Amazon Redshift, Vertica, SQL Server, Oracle, MemSQL, Sybase, Exasol and Google BigQuery. We add more all the time.