Grammarly has crossed into the mainstream in a way few writing tools have managed. More than 10 million users and a 4.5-star Chrome store rating suggest something beyond niche appeal. The free tier handles the basics. The question is whether the paid version earns its keep.
For anyone writing in English every day, the answer hinges less on individual features than on whether the upgrade changes your actual workflow.
What happened
- Grammarly Premium runs $11.66 per month on annual billing, with discounts around 20% during major sales.
- Coverage includes browser extensions for Chrome and Firefox, a Microsoft Word plugin, and a desktop application.
- Premium adds plagiarism detection, vocabulary suggestions, and advanced grammar checks.
- The free tier covers spelling, basic grammar, and concision suggestions.
- Grammarly has not publicly announced Black Friday or Cyber Monday deals, though partner discounts are available.
What the premium tier actually adds
The free version catches typos and obvious punctuation errors. The paid tier is a different product. Three features stand out.
Vocabulary suggestions** flag weak or overused words and propose sharper alternatives. This helps when you have been staring at the same paragraph too long and ordinary spellcheck has nothing useful to offer. **Plagiarism checking** is the significant addition. For anyone publishing content under their own name or a company brand, this single feature often justifies the upgrade. The free tier does not include it. The third leg is **advanced grammar feedback**: comma splices, awkward phrasing, inconsistent tense, and the catalog of small errors most people eventually learn to live with—but only after someone has already read them.
Where Grammarly fits into a working day
Browser extensions cover most web editors and email clients. The Word plugin handles longer documents. The desktop application serves as a fallback for tools that do not integrate with a browser.
The practical rhythm for a heavy writer: draft, paste into Grammarly, revise, send. The goal is not perfection. It is removing typos and awkward phrases before a piece consumes someone else's attention. That is a small but real productivity win for anyone in a review cycle.
Who should care
| Use case | Free tier | Premium worth it? |
|---|---|---|
| Casual email and chat | ✓ | No |
| Student essays | Partial | Yes, especially for ESL |
| Blogger or content creator | Partial | Strong yes—plagiarism check alone |
| Academic or professional publishing | Partial | Yes, if attribution matters |
| Developer or technical writer | Partial | Depends on review culture |
The honest test: did you send something last month that contained an embarrassing typo or an uncited statistic? If yes, the upgrade earns its seat fast. If your writing never reaches another person's eyes, the free tier covers the gap.
Mobile use is a separate consideration. Grammarly's mobile keyboard is functional but intrusive for light users. Most people leave it off and switch keyboards only when needed.
What to watch next
Built-in spellers in AI assistants, Google Docs' smart compose, and browser-native suggestions are all chasing the same territory. Grammarly's edge remains the depth of its rule set and broad platform support. Watch how the company responds as more platforms bake grammar help in by default. For now, especially at a discount, the upgrade is the safer bet for anyone who publishes regularly.
Key takeaways
- The free tier handles spelling and basic grammar, but leaves vocabulary, plagiarism checking, and advanced grammar to the paid version.
- If you publish anything under your name or brand, the plagiarism detector alone often justifies the annual cost.
- Writers using English as a second language see faster returns from the clarity and vocabulary feedback.
- Platform coverage is broad: Chrome, Firefox, Word, and a desktop app cover most workflows.
- Watch for partner-sourced discounts rather than official announcements, especially in late November.
Frequently asked questions
Is Grammarly Premium worth the upgrade?
If you publish regularly or write in English as a second language, yes. The plagiarism check and vocabulary feedback are the two features the free tier does not cover.
How much does Grammarly Premium cost?
Around $11.66 per month on annual billing. Discounts of around 20% appear during major sales events, though Grammarly does not always publish these officially.
Does Grammarly work offline?
The desktop app checks text offline for some rules, but core grammar and plagiarism checks require a connection.
Can I use Grammarly on mobile?
Yes, there are iOS and Android keyboards. Light mobile writers often keep the system keyboard active and switch only when needed.
Does Grammarly store my documents?
The service processes text on its servers to provide suggestions. Sensitive material may be worth running through a local-only tool instead.