Grammarly

Grammarly is the world's most widely used AI writing assistant with over 30 million daily users. It goes far beyond spell-check — analyzing tone, clarity, engagement, and delivery in real time as you write, across every platform you already use.

The 2026 version includes Grammarly GO, a generative AI layer that rewrites entire paragraphs, adjusts your tone on command, and drafts content from bullet points. It works natively inside Gmail, Google Docs, Microsoft Word, Slack, LinkedIn, and 500,000+ other apps via a lightweight browser extension.

What makes Grammarly different from ChatGPT: Grammarly improves what YOU write, inline. ChatGPT generates new content from scratch. Most serious writers use both — Grammarly as their editor, ChatGPT as their ghostwriter.

The Business plan adds custom style guides, brand tone enforcement, and team analytics — making it the de facto writing standard for content teams and agencies worldwide.