Short answers, pulled from the story.
AllMusic was founded by Michael Erlewine in 1990 in Big Rapids, Michigan. Erlewine was frustrated after buying a compact disc he believed contained early recordings by Little Richard, only to find it was a "flaccid latter-day rehash." His goal was to build an open-access guide that documented every recording since the earliest days of commercial music.
AllMusic catalogs well over three million album entries and 30 million tracks. By February 1999, the site had already cataloged 350,000 albums and two million tracks and published 120,000 record reviews, reflecting the scale it reached in its first decade.
AllMusic was built by Michael Erlewine alongside database architect Vladimir Bogdanov and his nephew, writer Stephen Thomas Erlewine. Chris Woodstra joined in 1993, bringing what the organization described as an "encyclopedic knowledge of music" gained through years of writing for alternative publications and fanzines. Bogdanov later became president and main editor of the All Music Guide book series.
Alliance Entertainment Corp. purchased AllMusic from its founder in 1996 for a reported $3.5 million, and TiVo Corporation acquired it in late 2007 for $72 million. BlinkX, later renamed RhythmOne, purchased AllMusic in 2015 and has owned it since.
AllMusic produced the All Music Guide book series, a collection of printed genre reference guides with Vladimir Bogdanov serving as president and main editor. Separate volumes cover jazz, blues, country, rock, soul, hip-hop, electronica, and classical music, each titled as a "Definitive Guide." The jazz guide ran to four editions between 1994 and 2002, and the main popular music guide reached its fifth edition in 2008.
AllMusic removed all information about Bryan Adams from its site in 2012 at the artist's own request. The removal was unusual given that AllMusic had been built around the goal of comprehensively documenting recorded music.