Zeal was a volunteer-built web directory, first appearing in 1999, and then acquired by Look Smart in October 2000 for $20 million. Zeal combined the work of Looksmart's paid editors with that of volunteers who profiled websites and placed them in a hierarchy of subcategories. The resulting categories and profiles were downloaded at intervals by LookSmart and its partners, other search companies such as MSN, Lycos, and Altavista, for use in their own systems with or without modification.