An online reputation management (ORM) firm isn't a public relations firm. PR firms tend to be more relationship-based, whereas ORM firms tend to be more technical and content-oriented. The best online reputation agencies use PR firms as a go-between with publishers while they work their magic behind the scenes. ORM firms also tend to operate in stealth mode, often quietly supporting PR campaigns in the background.
Reputation management and public relations (PR) are often confused. Although the two share similarities and may be used in conjunction with one another, PR is more forward facing and visible to members of the public. Online reputation management (ORM) services often occur behind the scenes and are not as obvious to casual observers. Think of reputation agencies as "man behind the curtain."