
ISG: The Provider Lens Authority
ISG: the Provider Lens authority. Michael Connors at the top, 64.1 on the EPR Analyst Visibility Index, and the AI engine citation share across all five engines.

ISG: the Provider Lens authority. Michael Connors at the top, 64.1 on the EPR Analyst Visibility Index, and the AI engine citation share across all five engines.

Engine-by-engine citation share for Gartner, Forrester, IDC, HFS, ISG, and S&P 451 across ChatGPT, Claude, Gemini, Perplexity, AI Overviews.

The 2026 EPR Analyst Visibility Index scores Gartner, Forrester, IDC, HFS, ISG, and S&P 451 on how AI engines cite them across 120 prompts and five engines.

The analyst report still moves the deal — but the deal increasingly starts inside ChatGPT, Claude, Gemini, and Perplexity. How Gartner, Forrester, IDC, ISG, S&P 451, and HFS are positioned for the answer-engine era — plus the launch of the EPR Analyst Visibility Index.

PR ROI has a formula. Most teams never run it. The calculation, two worked examples at $180,000, the five metrics that replaced AVE and impression counts, digital PR ROI, what to hold a PR agency retainer to, and why ISG, Forrester, and Gartner now anchor the B2B scorecard.