Analyst Relations is a term used to describe the practice of working with industry analysts to help with marketing awareness and sales acceleration programs. The best strategy depends upon your objective. Many analyst firms exist today. Gartner, IDC, and Forrester are three of the more well-known firms, however, many others exist. In terms of revenues, IHS Markit leads the pack with almost $4B and 13,000 employees. Gartner follows closely behind with $3.3B and 15,000 employees (source).
One can trace the origins of this industry to when technology solutions became difficult to understand and compare. In other words, when the technology purchase process became complex, which began back in the 1980s. Since that time, there has been quite a bit of specialization and fragmentation of the IT, technology and software markets. As new technologies continue to be introduced (cloud, AI, machine learning, etc.), systems and platform interoperability have only further added to the complexity!