In the simplest terms, these online assistants are powered by artificial intelligence, designed to help you refine your written content. Think of them as watchful hawks, swooping in to pick out spelling errors and grammar mistakes that you might have missed. Unlike AI writers, such as Rytr or Copy AI, known for their AI copywriting features, including long-form content, blog posts, product descriptions, and social media posts, the best AI writing assistants tools for spell checks and grammar don't generate content from scratch. Instead, they help you refine your own text, allowing you to produce quality content quickly by helping you avoid grammar mistakes, vocabulary repetition, and other errors, ultimately generating high-quality content.