Grammarly

Grammarly remains the category-defining AI writing assistant, having evolved well beyond basic spellcheck into a full suite covering tone, clarity, generative rewriting, and even AI-content detection, all delivered through browser extensions, desktop apps, and deep integrations with tools like Google Docs and MS Office. Its strength is ubiquity and reliability: the suggestions are consistently useful for everyday professional writing, and its enterprise tier backs that up with real security and compliance credentials that make it viable for large organizations. The tradeoffs are the usual freemium squeeze — free users get capped AI prompts and the good stuff sits behind Plus or Enterprise pricing — and power users writing in niche domains will still find its tone and style suggestions occasionally too generic. Still, for the breadth of what it covers and how frictionlessly it inserts itself into a writer's existing workflow, it's an easy anchor recommendation in the writing-tools space.