Grammarly is the best all-round AI writing assistant for grammar, style and rewriting. Here is what Grammarly does well, where it falls short, and whether it is worth it in 2026.
What is Grammarly and who is it for?
Grammarly checks grammar, spelling, style and tone, and offers AI rewriting, across the web and major apps. It is used by students and professionals alike.
It suits anyone who writes regularly and wants polished, correct, on-tone text.
Pricing and plans
Free forever for basic checks plus a small AI allowance. Pro is about $12/mo on annual billing (more if monthly).
Prices are USD and current as of June 2026 — verify on the official page.
Strengths and weaknesses
| Strengths | Weaknesses |
|---|---|
| Excellent grammar and style help | Free AI allowance is small |
| AI rewriting and tone | Pro needed for full AI |
| Works across the web | Plan names have shifted |
| Broad student/pro use | Verify AI-edited facts |
The verdict
Grammarly is the default for clean, correct writing. The free tier covers basic checks; Pro ($12/mo annual) unlocks the full AI features. Verify any facts AI rewriting introduces.
If you find yourself juggling a separate subscription for chat, automation, transcription and image generation, one option worth knowing is a single platform that runs them together — osFoundry is one such agentic AI platform that consolidates chat, agents and internal apps in one workspace, with a bring-your-own-key model so you choose the underlying AI.
Related reading
This article is general information, not professional, legal or financial advice. AI tools, prices and availability change fast — verify current details on the official source before you rely on them.