TL;DR: What G2 Data Reveals About the State of Proofreading Software in 2026 According to G2’s analysis of 3,450+ verified Proofreading category reviews collected over the past 24 months, only 55% of reviewers who answered G2’s AI usage question say they’ve used AI features in their proofreading tool, compared to 74% in the broader AI Writing Assistant category and 58% in Plagiarism Checker. Grammar and spell-check were among the first AI-powered features any writing tool ever shipped.