The Influencer Index ranks brand engagement on LinkedIn using our proprietary scoring system leverageing StackRank® which measures Media Points and Engagement Metrics to identify firms building real influence.
2026 Top Public Relations Firms
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All rankings reflect publicly available LinkedIn activity collected between January 1, 2025 and December 31, 2025. Rankings are based on proprietary scoring developed by Business Intelligence Group using data provided by StackRank®, including measures related to media footprint, engagement quality, company size, follower growth, and other public signals.
The BIG Index is a proprietary composite score built from StackRank® data and related public information. The BIG Engagement Index is based on public engagement activity, including likes, comments, and reposts. Rankings are divided into categories based on publicly available company size information and other stated criteria. Unless otherwise noted, firms with fewer than 100 posts during the measurement period were excluded from consideration. Boutique firms are defined as organizations with up to 50 employees, mid-sized firms as those with 51 to 500 employees, and large firms as those with more than 500 employees. The Fastest Growing Public Relations Agencies ranking is based on follower growth as a percentage increase from the start to the end of the measurement period. All data is based on information believed to be accurate at the time of analysis. Because social platform data and public company information can change over time, rankings should be viewed as a snapshot of performance during the stated period and not as an endorsement, guarantee, or audit of any organization.
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