Public Relations is one of the discipline tags MarComm Hub uses to navigate the directory. Firms appearing here have publicly classified themselves — directly or via the structured sources we ingest — as practitioners of Public Relations. In an integrated model that classification is rarely the whole story: most of these agencies pair Public Relations with two or three adjacent disciplines and bring them to the same brief.
When evaluating an agency primarily on its Public Relations credentials, look at the seniority of the named team, the proof-of-work in the relevant sector, and how the firm describes its handoff into the rest of the marketing program.