Grammarly
According to AI Tier List, Grammarly is rated Tier S for Academic Writing. How we rank →
A world-leading AI-powered writing assistant for grammar correction and writing enhancement.
Grammarly enhances writing quality through real-time grammar checking, spell correction, and tone analysis. It is optimized for students, professionals, and writers who need to produce clear and professional content.
Tier Reason
It maintains an unrivaled market share and status as the industry standard in grammar correction and writing assistance. By successfully integrating generative AI, it continues to hold a technical advantage as an intelligent writing tool that goes beyond simple corrections.
Strengths
Real-time grammar correction, cross-platform integration, tone and style analysis, plagiarism detection, generative AI-based rewriting
Weaknesses
Limited features in the free version, inconsistent AI detection results, potential for errors in complex sentences
Recent ChangesJul 19, 2026
Renamed Premium plan to Pro, updated AI detection models, enhanced generative AI-based rewrite functionality
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