How we review: this assessment is based on the product’s official documentation, current pricing and published independent evaluations; it is not a hands-on test. Read our review methodology.
Grammarly predates the generative-AI boom by more than a decade, and the company points out that AI was “central to our product long before it became a buzzword”. In 2026 it sits inside a broader Superhuman suite and offers a set of specialized writing agents alongside its classic corrections. This review weighs what Grammarly documents today against the many general-purpose assistants that now also edit text.
What it is
Grammarly is a writing assistant that checks and improves text as you type. Its core is spelling, grammar, punctuation and clarity suggestions; on top of that sit rewriting, tone adjustment, an assistant called Go that works across apps, an AI document editor called Docs, and tools for detecting AI-generated text and plagiarism. It runs as browser extensions, desktop and mobile apps, and add-ins for Microsoft Office and Google Docs. See our Grammarly directory entry for a short summary.
Key features
- Core corrections. Spelling and grammar correction and tone visibility are available on the free plan.
- Writing agents. Grammarly’s AI page highlights four agents — Proofreader, Paraphraser, Reader Reactions (feedback from the point of view of a target reader) and Humanizer — and lists Citation Finder and AI Grader alongside them.
- Go. An AI assistant described as working “across every app, tab, and workflow”, including email, documents, Slack and support tools.
- Pro editing features. Full-sentence rewrites, tone adjustment, fluent English suggestions, inclusive language and citation consistency.
- Detection. AI-generated text detection and plagiarism detection on Pro, plus an Authorship feature to show how a piece was written.
- Team tools. Style guides, brand tones, snippets, knowledge sharing, analytics, roles and permissions.
- Enterprise controls. SAML SSO, SCIM, bring-your-own-key encryption, data loss prevention, audit logs API and confidential mode.
Pricing
At the time of writing (October 2026), Grammarly’s official plans page lists three tiers:
| Plan | Price | AI prompts |
|---|---|---|
| Free | $0 | 100 per month |
| Pro | $12/member/month billed annually ($144/year) | 2,000 per member per month |
| Enterprise | Contact sales | Unlimited |
The annual figure comes from Grammarly’s support center; the plans page shows the equivalent €12 to European visitors. Grammarly’s own pages give different figures for month-to-month billing, so we have not stated one — check the checkout page. Pro has a free trial.
Strengths
Ubiquity is the reason to choose Grammarly. A chatbot requires you to copy text into a separate window; Grammarly works in your email, documents, browser forms and chat tools, flagging problems in place. For people who write all day, that removes friction no general assistant matches.
The free plan remains genuinely useful. Spelling and grammar correction with no payment covers what many users need, and the 100 monthly prompts give a taste of the generative features.
Pro is well aimed at professional and team use. Style guides, brand tones and snippets help organizations keep writing consistent across many people, and features such as citation consistency and inclusive-language suggestions are specific to editing in a way that general models are not. The specialized agents — especially Reader Reactions — package useful editing workflows that would otherwise require careful prompting. Our article on keeping your voice when editing with AI covers how to use tools like this without flattening your style.
For larger organizations, the Enterprise tier adds the controls security teams typically ask for: bring-your-own-key encryption, data loss prevention, SAML single sign-on, SCIM provisioning, an audit logs API and confidential mode. It also removes the prompt ceiling, which matters for teams that lean heavily on the generative agents.
Limitations
The generative side faces strong competition. Rewriting, summarizing and drafting are now standard in ChatGPT, Claude, Microsoft 365 Copilot and Google’s tools, many of which users already pay for. Grammarly’s value is increasingly in its integration and editing focus rather than raw generation.
Pricing is not fully transparent. Grammarly’s official pages show different month-to-month prices in different places, and the move into the Superhuman suite has added bundling options. Buyers should confirm the final price at checkout.
AI-text detection deserves caution. Independent research has repeatedly found that AI detectors produce false positives, particularly for non-native English writers. Grammarly frames its detector and Authorship tools as ways to show how work was created, which is the right framing — but no detector score should be treated as proof.
Prompt limits are worth watching too. The free plan’s 100 prompts a month are a taste rather than a working allowance, and while 2,000 a month on Pro is generous for most people, heavy users of rewriting and agents should check their usage before committing a whole team.
Who it’s for
- Professionals who write constantly across email, documents and chat.
- Non-native English writers who want fluency and tone suggestions in place.
- Teams and companies that need consistent style and brand voice.
- Students who want proofreading and citation help (with care around detection tools).
Alternatives
- LanguageTool — multilingual grammar checking with strong European language support.
- QuillBot — paraphrasing-focused, with a lower-cost paid tier.
- ChatGPT — if you mainly need drafting and rewriting rather than inline checks.
See our checklist for choosing an AI writing assistant for a structured comparison.
Verdict
Grammarly earns 4 out of 5. Its documented strengths — inline corrections that work almost everywhere, a useful free tier, specialized editing agents and solid team controls — keep it the easiest writing assistant to live with day to day, and Pro is fairly priced on annual billing. We deduct a point because much of its generative functionality now overlaps with assistants people already pay for, monthly pricing is unclear, and its AI-detection features must be used carefully.
