Grammarly has been the default writing assistant for over a decade, but with AI chatbots like ChatGPT and Claude now offering writing help, is Grammarly still worth paying for? We tested both plans extensively to find out.
Grammarly at a Glance
| Feature | Details |
|---|---|
| Free Plan | Grammar, spelling, punctuation |
| Premium | $12/user/mo (annual) |
| Business | $15/user/mo (annual) |
| Platforms | Chrome, Edge, Safari, Firefox, Desktop, Mobile |
| AI Features | GrammarlyGO (generative AI) |
What Grammarly Does Well
Works Everywhere
Grammarly’s killer feature isn’t its grammar engine — it’s the distribution. The browser extension works in:
- Gmail and Outlook
- Google Docs and Microsoft Word
- Slack and Teams messages
- Social media posts
- Any text field on any website
No other writing tool matches this ubiquity. You write once, Grammarly checks everywhere.
Real-Time Corrections
Unlike AI chatbots that require copy-pasting text, Grammarly corrects as you type. This inline experience is seamless — underlines appear, you click to accept, and you keep writing. For professionals who write hundreds of emails daily, this saves significant time.
Tone Detection
Grammarly analyzes your writing tone and flags when it might come across as too formal, too casual, or unconfident. This is especially useful for:
- Client-facing emails
- Job applications
- Professional communication in a non-native language
Free vs Premium: What’s the Difference?
Free Plan Includes:
- Grammar, spelling, and punctuation corrections
- Conciseness suggestions
- Tone detection
- Basic GrammarlyGO (25 prompts/month)
Premium Adds:
- Clarity-focused sentence rewrites
- Vocabulary enhancement suggestions
- Tone adjustments (formal, confident, friendly, etc.)
- Plagiarism detection (100B+ web pages)
- Full-sentence rewrites
- GrammarlyGO (1,000 prompts/month)
- Writing style consistency checks
Is Premium Worth It?
For casual writers, the free plan catches the most important errors. Premium is worth it if you:
- Write professionally (proposals, reports, content)
- Are a non-native English speaker
- Need plagiarism checking
- Want AI rewriting assistance
For a detailed comparison, see our Grammarly free vs paid breakdown.
GrammarlyGO: The AI Writing Assistant
Grammarly’s generative AI feature (GrammarlyGO) lets you:
- Compose drafts from prompts
- Rewrite existing text in different tones
- Reply to emails with AI-suggested responses
- Summarize long text
- Brainstorm ideas
It’s competent but not as capable as dedicated AI chatbots. Think of GrammarlyGO as a quick shortcut within your workflow, while ChatGPT or Claude are full creative partners.
Grammarly vs AI Chatbots
| Feature | Grammarly | ChatGPT/Claude |
|---|---|---|
| Inline corrections | Yes | No |
| Works in all apps | Yes | No (separate window) |
| Long-form writing | Limited | Excellent |
| Plagiarism check | Yes (Premium) | No |
| Creative writing | Basic | Strong |
| Code review | No | Yes |
| Price | $12/mo | $20/mo |
The verdict: Grammarly and AI chatbots serve different purposes. Grammarly is for polishing — catching errors and improving clarity in real-time. AI chatbots are for creating — drafting, brainstorming, and generating content from scratch.
Many professionals use both: Claude for drafting, Grammarly for final polish.
Performance and Accuracy
In our testing, Grammarly correctly caught:
- 98% of spelling errors
- 95% of grammar errors
- 90% of punctuation issues
- 85% of style/clarity improvements
False positives (incorrect suggestions) occurred about 5% of the time, mostly with technical jargon, brand names, and intentionally informal writing.
Privacy Considerations
Grammarly processes your text on its servers to provide suggestions. While they state they don’t sell user data, sensitive content (medical records, legal documents, proprietary information) should be handled carefully. The Business plan offers additional data controls and compliance features.
Who Should Use Grammarly?
Best for:
- Professionals who write extensively in email and documents
- Non-native English speakers
- Students submitting academic papers
- Content marketers who need consistent quality
Skip it if:
- You only write casually
- You already use AI chatbots for writing help
- Privacy is your top priority
Verdict
Grammarly remains the best inline writing assistant in 2026. The free plan is genuinely useful and catches the majority of errors. Premium is worth $12/month for professionals who write daily and want polished, confident communication.
It’s not a replacement for AI chatbots — it’s a complement. Use Claude or ChatGPT for drafting, Grammarly for polishing.
For more writing and productivity tools, check our best AI writing tools in 2026 and best free AI tools.