Grammarly

In 2026, Grammarly remains the most ubiquitous AI writing assistant, processing over 50 billion suggestions annually across 500,000+ teams. Its browser extension integrates seamlessly into Gmail, Slack, Google Docs, LinkedIn, and Twitter — surpassing even #10 Descript in cross-platform coverage. The free tier catches 90% of errors, while Premium ($12/month) adds tone detection, full-sentence rewrites, and plagiarism checking. With over 30 million daily active users, Grammarly is 3x faster than the typical grammar tool at generating new paragraphs and adjusting formality levels. For non-native English speakers, it transforms writing clarity, reducing editing time by an average of 40% based on user feedback.