Grammarly Review: The Editor That Lives in Your Keyboard

Grammarly has been correcting my commas since 2018. In that time it's saved me from exactly 847 instances of "your" when I meant "you're" and at least three sentences that would have made me sound like a corporate robot. It's also suggested approximately 400 changes that would have made me sound exactly like a corporate robot. Knowing which is which is the entire Grammarly skill.

What Grammarly Gets Right

• Tone detection. Grammarly's tone detector — "this sounds confident," "this sounds formal," "this sounds sad" — is surprisingly accurate. It catches when a professional email accidentally sounds passive-aggressive. It flags when a blog post's opening paragraph reads like a terms-of-service agreement. For anyone who writes without an editor, this feature alone is worth the subscription.
• Clarity rewrites. The AI-powered "clarity" suggestions are the strongest feature in Grammarly's 2026 suite. They don't just fix grammar — they identify sentences that are grammatically correct but structurally confusing. "The report, which was completed by the team that had been assembled for the project that had been delayed, was submitted late" → "The project team's delayed report was submitted late." This is not editing. This is surgery. And it's usually right.
• Cross-platform integration. Grammarly works everywhere you type: Google Docs, email, Slack, Notion, WordPress. The consistency matters. You develop a relationship with the tool — you learn when it's right and when to override it — and that relationship follows you across every writing surface.

Where Grammarly Falls Short

• Style homogenization. Grammarly has a bias toward corporate clarity. If you write with personality — sentence fragments, deliberate repetition, the occasional long sentence that winds through several clauses before landing — Grammarly will try to sand it smooth. The result is correct. It is also boring. A writer's voice is partly in the "mistakes." Know when to say no.
• Plagiarism checker is unreliable. Grammarly's plagiarism detection flags common phrases and false-positives on original work. It's directionally useful for students, but for professional writers, it creates more anxiety than value.
• Generative AI features are mid. Grammarly added "compose with AI" in 2024. It's fine. ChatGPT and Claude both produce better, more natural long-form text. Use Grammarly for editing, not for drafting.

The Verdict

Grammarly Premium ($12/month) is the single highest-ROI tool in a writer's toolkit. It catches errors no human editor would find consistently. It makes unclear sentences clearer. It works everywhere. And it occasionally tries to erase your voice — but the override button is right there, and using it is part of the craft.

Free tier is adequate for casual writers. Premium is worth it if you write professionally — the tone detection and clarity rewrites pay for themselves in one saved-embarrassment email per month.