Operabase is an on-line database of opera performances, opera houses and companies, performers themselves as well as their agents. Operabase, found at operabase.com, was created in 1996 by an English software engineer and opera lover, Mike Gibb. Initially a hobby site, it became his full-time occupation after three years.
Public site 
By its tenth anniversary, the site received "about 10,000 visitors a day to the public site, who look at over four million pages a month between them. Of these, fewer than half use English, 17% use German, 12% Italian, 10% French, 9% Spanish." In autumn 2006, the magazine Opera Now reported that "Operabase has taken on the Herculean task of making [the site] available to every European Union citizen in their own language - not only the 21 (as at January 2007) official languages of the EU, but Catalan, Icelandic and Norwegian as well." As of November 2012, the free public area of the site is available in 22 languages, and includes 37,000 performances, 40,000 artists, 700 opera companies, festivals and theatres, and the contact details and rosters of 400 artist managers.
Operabase Professional 
Seven years after the public site was launched, a professional site followed and within three years, "200 opera houses from the Met to La Scala" were subscribers. The initial service offering for the 750 euro annual subscription fee was increased artist information and an opera casting tool. The casting tool was used for researching singers for a given role, but was particularly valued for finding replacement singers when there were emergency cancellations. The tool could not only put forward the names of all of the singers who had sung that role, but the artist schedules could be used to find if they were available, and the artists management and contact information could be used to make contact.
The professional services now also include a global database of opera productions available to rent or buy.
The database is now operated by Gibb and Muriel Denzler, who provide services to opera professionals for a fee, although the site is searchable by any web user at no charge.
As has been noted by Gibb and Denzler in an article on the website of Opera Europa (the European opera service organization similar to those which exist in the US and Canada, OPERA America and Opera.ca) they provide specialized services to opera professionals, with the site including "casting tools, artist records, management details, productions information". But they emphasize that "the site was originally created for the general public, who still provide 96% of its users".
Opera statistics 
In autumn 2010, Operabase produced a set of statistics for the opera world to mark the 250,000th performance on file. These statistics were presented at the third European Opera Forum, organised by Opera Europa in London in March 2011. In autumn 2012, the statistics were updated to the 2011/12 season.
Most played composers 
In the five seasons 2007/8 to 2011/12, works from nearly 1200 different composers were played. The most popular composers were:
- Giuseppe Verdi, with more than 3000 performance runs across the five seasons
- Wolfgang Amadeus Mozart
- Giacomo Puccini
- Richard Wagner
- Gioachino Rossini
More than 600 of the composers played in this period were alive. The most frequently programmed of these were Philip Glass, Hans Werner Henze, and John Adams. Kaija Saariaho was the most played female composer, living or dead.
Most popular operas 
In this five season period, a total of 2588 different works were given, including over 300 world premieres. The most popular operas overall were:
- La traviata (1853, Verdi) with 629 performance runs
- La bohème (1896, Puccini)
- Carmen (1875, Bizet)
- Die Zauberflöte (1791, Mozart)
- Tosca (1900, Puccini)
The most popular operas from composers from the 20th century were The Turn of the Screw by Benjamin Britten and Lady Macbeth of the Mtsensk District (1934, Dmitri Shostakovich). The most popular works by composers alive at 31 July 2012 were the monodrama The Diary of Anne Frank (composed 1968, Grigory Frid), and the opera Dead Man Walking (2000, Jake Heggie).
Most operatic places 
In the 2011/12 season, the cities with the most opera performances are
- New York Times, Edward Schneider (29 July 2001). Singing and Their Suppers. Retrieved 13 May 2011.
- Higgins, The Guardian (London)
- Mike Gibb and Muriel Denzler, "Operabase's 10th Anniversary" on opera-europa.org
- Opera Now, Kenneth Richardson (Sept/Oct 2006). "Net results". Operabase, the internet tool for opera lovers and professionals, is ten years old. Kenneth Richardson talks to computer wiz and opera lover Mike Gibb about the journey so far and his ambitious plans to develop the site in future
- Operabase.com landing page. Retrieved 13 November 2012
- Daily Telegraph, Adam Sweeting (25 Oct 2007). The show must go on - but how? When the star of the Royal Opera House's 'Ring' cycle fell ill the day before the show, everything seemed lost. Adam Sweeting tells the story of a frantic 24 hours. Retrieved 18 November 2012.
- Operabase.com Statistics page. Retrieved 13 May 2011.
- Anaclase, Gilles Charlassier. Forum Opera Europa. Troisième forum des professionnels de l’art lyrique. Retrieved 13 May 2011.
- Opera Europa. OEuvres newsletter no.33 Spring 2011. Retrieved 19 November 2012.