Is Grammarly the Best Grammar Checker? (17 Ques Answered!)

Grammarly is a popular grammar checker trusted by millions of users worldwide. 

But is it the best grammar checker there is? 

Let’s find out. 

You can also upgrade to Grammarly Premium if you want to hone your writing skills with custom goals, tone suggestions, and vocabulary enhancement tips. 

Thanks to its features and affordable pricing, over 30 million people use Grammarly to elevate their writing and succeed in their respective journeys. 

Tip: Get Grammarly Premium at 25% off using our EXCLUSIVE Master Blogging offer. Click here to learn more!

Why Grammarly is the best grammar checker?

Grammarly is the top-rated grammar checker in the market—thanks to its accuracy in detecting writing issues and providing reliable correction suggestions. Its AI-powered writing assistant also offers tone suggestions, presents engaging word choices, automates citations, improves your tone, and includes several other features you can’t find in other tools.

If you only need to correct punctuation, spelling, and grammar mistakes, Grammarly has a free version you can use indefinitely. The free grammar checker also lets you set custom writing goals and improve the clarity of your articles by highlighting unnecessary words. 

But if you want to make the most out of Grammarly, consider upgrading to the premium version for $30 per month. Or, you can click here to get an exclusive 25% discount on your subscription. 

Here’s a quick, side-by-side comparison of Grammarly and the other top grammar checkers in the market:

What kind of grammar mistakes does Grammarly catch?

Grammarly detects writing issues under four categories: correctness, clarity, engagement, and delivery. “Correctness” covers all essential issues (spelling errors, wrong tenses, etc.), whereas “clarity,” “engagement,” and “delivery” target quality issues (transition phrases, word variety, inclusive language, etc.). 

Below are some examples of the issues that Grammarly catches:


  • Punctuation errors
  • Spelling errors
  • Missing spaces
  • Hyphenation mistakes
  • Agreement mistakes
  • Wrong pronouns
  • Wrong comma splices
  • Wrong prepositions
  • Non-collocational words
  • Wrong article usage
  • Wrong verb tenses
  • Wrong article-noun agreement
  • Unnecessary verbs


  • Unclear sentences
  • Wordiness
  • Unclear phrases
  • Unclear antecedents
  • Missing transition phrases
  • Redundancy


  • Commonly-overused words
  • Vague words
  • Repeated words


  • Non-inclusive language
  • Negative language
  • Non-confident language
  • Sentence fragments

How accurate is Grammarly grammar check?

In terms of accuracy, Grammarly is at the top of the grammar checker software space—able to catch most grammatical, punctuation, and spelling mistakes. It also accurately detects writing issues that affect your article’s clarity, engagement factor, and delivery. 

On top of that, Grammarly also provides relevant and correct suggestions that will polish your writing. 

How does Grammarly compare with other grammar checkers?

Grammarly catches more mistakes than ProWritingAid, WhiteSmoke, Ginger Software, and other grammar checkers. It also provides better correction suggestions and features for enhancing article quality, like engaging word choices, tone suggestions, full-sentence rewrites, custom writing goals, and more.

I ran a test using text with a total of seven issues. 

ProWritingAid, one of the top Grammarly alternatives in the market, are only able to detect three of them. 

QuillBot, an AI-powered paraphrasing tool with a built-in grammar checker, detected four of them. 

Lastly, Grammarly’s free grammar checker managed to identify five issues in the copy. But with Grammarly Premium, it successfully detected all seven punctuation, spelling, and grammatical errors, including writing issues. 

Does Grammarly catch all mistakes?

Grammarly’s free version catches all basic writing mistakes, but it tends to miss advanced issues that affect the article’s quality, including commonly-overused words, vagueness, negative language, negative tone, and sentence fragments. This changes if you upgrade to Grammarly Premium, which reliably identifies and addresses EVERYTHING you can improve in your piece. 

This includes writing issues that other paid and free grammar checkers miss, like negative tone, unnecessary phrases, non-inclusive language, repeated words, and wrong tenses. 

Must-read: Grammarly Free vs Grammarly Premium: Detailed Comparison (2023)

Can Grammarly check PDFs for grammar and spelling issues?

Unfortunately, Grammarly Free and Grammarly Premium are currently unable to check PDFs for grammatical and spelling mistakes. Grammarly also doesn’t support LATEX and Markdown files—unless you copy their contents and paste them into the Grammarly online editor. 

Does Grammarly ever make mistakes?

As powerful as Grammarly is, the online grammar checker sometimes highlights sentences, phrases, and words that don’t need corrections. This commonly occurs with the use of nouns, acronyms, technical terms, and expressions, like “SERP” (Search Engine Results Pages), “IFTTT” (If This Then That), and “nofollow/dofollow link.”

You may also run into issues with collective nouns when using Grammarly. 

For example, “audience” refers to a group or the individuals within that group, which means it can be singular or plural depending on the context. 

In the example below, “audience” is used to describe multiple individuals (as made clear by the word “plenty”). However, Grammarly still considers it as a singular collective noun. 

Should I always trust Grammarly?

No, you shouldn’t trust Grammarly with 100% of your writing, proofreading, and editing processes—or any other tool, for that matter. It’s always a good idea to double-check your work (including Grammarly suggestions), especially in business and academic writing. 

For example, “salesy” is a word that describes people or things that sell too aggressively. Despite its widespread use in the business world, Grammarly still sees it as a misspelling. 

The good news is, you can prevent Grammarly from identifying “salesy” as a mistake by adding it to your personal dictionary. Just click ‘Add to dictionary’ when you see the suggestion in the writing assistant. 

How to check grammar in Grammarly?

You can use the Grammarly checker to proofread articles via the online editor, desktop app, browser extension, or Microsoft Word add-in. Using the online editor to use the grammar checker is the most accessible option for most users. 

To use the Grammarly online editor, log in to your Grammarly dashboard, and click ‘New’ to edit a new document. If you saved your article on your computer, click ‘Upload’ instead. 

Grammarly supports documents with up to 100,000 characters and saved using the following file formats:

  • .doc
  • .docx
  • .odt
  • .txt
  • .rtf

When creating a new document, you can type your article directly into the editor or paste the text from another source. 

Grammarly’s writing assistant panel should automatically detect writing issues and generate correction suggestions, which you can apply in one click. 

How to decide whether to accept or reject suggestions made by Grammarly?

First, ensure to configure your personal writing goals to receive more relevant correction suggestions from Grammarly. From there, scan the suggestions one by one and assess whether they fit your target audience, writing style, and branding goals. 

For example, let’s say your writing voice uses casual language. 

You may use the phrase “all the way” to emphasize the gap between one point and another. But since Grammarly doesn’t understand this, it highlights the phrase as unnecessary. 

While Grammarly’s suggestion definitely improves the article’s conciseness, it can dilute your personal writing style. As such, you can ignore or dismiss it by clicking the trash can icon. 

Tip: Click on the suggestion types under the writing assistant to emphasize specific issues (Correctness, Clarity, Engagement, and Delivery). Work your way from top to bottom and evaluate each issue before applying or dismissing a suggestion. 

Is 87 a good Grammarly score?

Yes, 87 is a great Grammarly score if you want to create reader-friendly and engaging pieces. According to Grammarly, getting a score of 60 and above is a good goal for most users.

A score of 87 on Grammarly could be considered good, but keep in mind that the score is just one aspect of your writing. It is always a good idea to carefully review and edit your writing to ensure that it is error-free and reads well, regardless of your score on Grammarly or any other tool.

Where does Grammarly grammar checker work?

The Grammarly grammar checker works on all modern web browsers through the web-based editor. Using the Grammarly Chrome extension, you can instantly access Grammarly’s proofreading features on popular websites and services, including: 

  • Google Docs
  • Social media websites
  • Email services
  • Messaging websites
  • Online forums
  • Blogging platforms

You can also use Grammarly as a Microsoft Word add-in, desktop app, and mobile keyboard. These options can be used for free, but only Grammarly Premium users can access advanced correction suggestions and other paid features.

FAQs about Grammarly Grammar Checker

Is there a Grammar checker better than Grammarly?

Grammarly is better than most grammar checkers available, but the best one for you will depend on your specific needs and preferences. Some people may prefer one tool over another because of its unique features or the way it presents suggestions. 

Is Grammarly Premium for grammar checking worth it?

If you only need to iron out basic punctuation, spelling, and grammatical mistakes, Grammarly Premium is unnecessary since the free version already does the job well. However, upgrading to Grammarly Premium unlocks a load of benefits, including the plagiarism checker, vocabulary enhancement suggestions, and advanced tone suggestions. You can get Grammarly premium at a 25% discount using this discount offer.

Can Grammarly be used on a mobile device?

Yes, you can use Grammarly on a smartphone or tablet using the Grammarly Keyboard app. This integrates with your device’s internal typing function, allowing you to check and improve everything you type on any app.

Does Grammarly’s free version detect all grammatical mistakes?

Grammarly Free can detect most spelling, grammar, and punctuation mistakes. But it may miss advanced writing issues that only Grammarly Premium can address, specifically errors that affect the article’s readability, conciseness, and engagement factor.

Ready to use Grammarly?

Overall, Grammarly’s combination of comprehensive grammar and spelling checks, personalized feedback, user-friendly interface, and wide range of premium features make it the ideal choice for writers. 

Give it a try by creating a free Grammarly account. If you like to jump into the Grammarly Premium experience, don’t forget to claim your exclusive 25% discount here


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