[2] Opera magazine describes the Operabase website as "the most comprehensive source of data on operatic activity".
[7] The initial service offering for the 750 euro annual subscription fee had increased artist information and an opera casting tool.
The relaunch of Operabase meant constructing a site as a Service-Orientated Architecture (SOA) that “provides a flexible interface that responds to the needs of individual users.”[4] The database was operated by Gibb and Muriel Denzler.
[6] Operabase is now available in 34 languages and provides services to opera professionals for a fee, although the site is searchable by any web user at no charge.
The professional services are available to companies, festivals, opera houses, theatres, orchestras, choruses, agencies, artists, academia and journalists.
[12] The Operabase rankings of the most performed operas formed the basis of a set of music questions in an edition of the BBC's University Challenge, broadcast in July 2014.
Competitors were asked to identify three operas in the Operabase list from sound clips of Maria Callas.