Writing assistant that checks grammar, tone and clarity across apps and browsers, with AI rewrites, an AI detector and plagiarism checks.
- Works across desktop apps, browsers, Office, Google Docs and mobile
- Free plan still covers core spelling and grammar checks
- Pro bundles an AI Detector and plagiarism checker with rewrites
- Specialized agents for citations, grading feedback and resumes
- Monthly Pro billing is far more expensive than paying annually
- Free plan is limited to 100 AI prompts per month
- Less useful for generating long drafts from scratch
Correcting grammar where people actually type is Grammarly’s original job, and the product now operates as part of Superhuman, which also sells its Enterprise plan through Superhuman Go. The assistant reviews text in real time and suggests fixes for spelling, grammar, clarity and tone.
Grammarly runs as desktop apps for Windows and Mac, browser extensions for Chrome, Safari, Firefox and Edge, add-ins for Microsoft Office and Google Docs, and mobile apps for iPhone, iPad and Android. The free tier covers spelling and grammar checks, tone visibility and 100 AI prompts a month. Pro adds full-sentence and paragraph rewrites, tone adjustment, an AI Detector, a plagiarism checker and 2,000 AI prompts per member each month. The company also offers task-specific agents such as Humanizer, Citation Finder, AI Grader, Reader Reactions and Resume Builder, and businesses can apply brand style guides.
Students, job seekers, marketers and anyone who writes a lot of email benefit most, since suggestions appear inside the tools they already use. Monthly billing costs well over twice the annual rate, so Pro makes more sense as a yearly commitment. Teams can add members to one subscription and manage billing centrally. Writers who mainly need long-form drafting rather than editing may find a general chatbot covers more ground, since Grammarly is strongest at polishing text that already exists.
