Grammarly

What Grammarly Actually Does Well

Grammarly's core value proposition hasn't changed much in years, and that's not a criticism—it means the fundamentals are solid. Grammar correction, passive voice flagging, clarity scoring, and tone detection work reliably across nearly every surface where you type. That ubiquity is the real product. You don't have to copy text into a separate tool; Grammarly follows you into Gmail, Google Docs, Slack, and most browser-based editors without friction.

The free tier is more honest than most freemium writing tools. You get real grammar and spelling corrections, not just a count of errors you can't see. For students, casual writers, or anyone who just wants a safety net, it holds up without a subscription.

Where It Falls Short

The generative writing features—GrammarlyGO—feel bolted on rather than built in. Rewriting a paragraph or generating a short email reply works fine, but asking it to draft anything substantial reveals the gap between Grammarly and purpose-built LLMs like Claude or GPT-4. If generative output is your primary need, Grammarly isn't the right tool.

Pricing also becomes a friction point at scale. At $12–15 per user per month for premium or business tiers, a 10-person team is paying $1,440–$1,800 annually for what is, at its core, a proofreading layer. That's defensible for teams where polished external communication is critical—sales, customer success, content—but harder to justify for internal-only writing.

The tone detection, while useful, can be overly cautious. It frequently flags direct, confident writing as "forceful" or suggests softening language that doesn't need softening. Writers with a deliberate voice will find themselves dismissing suggestions often.

Who Should Use It

Grammarly fits best for non-native English speakers who write professionally, support teams handling high-volume customer communication, and anyone who wants passive error-catching without changing their workflow. It's a low-effort upgrade to writing quality across the board.

It's less compelling for experienced writers who already have strong mechanics, teams primarily using AI for content generation, or organizations writing in languages other than English. At its ROI score of 70.7, it earns its place—but mostly for the integration breadth and reliability, not the AI ambitions.