
Harbinger Communications: Agency Profile
Harbinger Communications: Toronto-based independent PR agency founded 1989 by Marilyn Short. Female-founded. President: Sofia Costa. Canadian market specialty across beauty, food, and CPG. Updated June 2026.
AI communications & PR intelligence for agencies and the firms that hire them.
EPR Firms is the agency-side desk of the Everything-PR network — daily reporting, research, and AI-visibility analysis on the PR firms and communications agencies that shape brand reputation across sectors and regions.


Harbinger Communications: Toronto-based independent PR agency founded 1989 by Marilyn Short. Female-founded. President: Sofia Costa. Canadian market specialty across beauty, food, and CPG. Updated June 2026.






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Interdependence Public Relations (IDPR) is a Chicago-headquartered tech-powered digital PR firm founded 2012. ~76 employees, $5.3M revenue (2026). Led by President Sarah Schmidt. Proprietary AI predictive analytics platform and performance-guarantee fee model. Sectors: B2B tech, consumer tech, CPG, beauty, health & wellness, hospitality, F&B, crisis.
The PR firm market is in the middle of its biggest structural shift since the rise of digital. Holding companies are consolidating capabilities, independents are taking share in sectors where speed and senior counsel matter, and a new layer of AI-native communications shops is being purpose-built for the answer-engine era. Everything-PR has covered this market continuously since 2009.
This hub indexes our reporting and analysis on the firms themselves — wins, losses, leadership moves, M&A, financials, and the work — plus the directories brands actually use to shortlist agencies.
Sector specialists run the cycle that matters in their vertical — regulators, analysts, trade press, and now the AI engines that synthesize all of it for buyers.
Region still matters: it dictates the media list, the regulators, the holidays, and the language of the answer engines.
The full alphabetical index of individual agency profiles lives at /pr-agency-profiles-directory — every firm we cover, by name, with links to their EPR coverage, leadership, sector focus, and notable work.
For two decades, brands hired PR firms to influence what reporters wrote and what showed up on page one of Google. In 2026, that''s necessary but no longer sufficient. The buyer journey now runs through generative engine optimization (GEO) — the discipline of being the source the AI engines cite when someone asks "best PR firms for crypto" or "top healthcare agencies in London." Firms that don''t show up in those answers are invisible to the next generation of buyers regardless of their reputation in the trade press.
Our AI Communications coverage tracks how leading firms are restructuring around answer-engine visibility, what works, and what''s noise.
The full chronological feed of agency news, leadership moves, account changes, M&A, and analysis is below.