Adam Jellal
April 13, 2026
Every student needs a grammar checker. The question is which one to use — because they're not all the same, and the differences matter more than the marketing suggests.
Some tools catch grammar errors. Others also catch clarity, tone, and style issues. Some work inside Google Docs and Microsoft Word. Some are genuinely free; others hide the useful features behind a paywall. And for students writing in English as a second language, language support varies significantly across tools.
This guide breaks down what the leading grammar checkers actually do, how they compare on accuracy, and which is worth using for academic essays in 2025.
A grammar checker isn't just catching typos. For academic writing specifically, a strong tool should:
For ESL (English as a Second Language) students, language support is an additional critical criterion — a tool that only handles US English well is significantly less useful than one built with multilingual writers in mind.
Typely's Grammar Checker handles the full range of errors students encounter in academic writing: grammar, spelling, punctuation, clarity, and style. The key advantage for students is integration: in the same platform where you draft with the Essay Writer, paraphrase with the Paraphrasing Tool, and check AI patterns with the AI Content Detector, you run the Grammar Checker as a final-stage pass.
This eliminates the workflow friction of switching between tools — a grammar check in the same platform where you've been writing means the context is preserved and the workflow stays clean.
Language support is Typely's standout feature for international students: 13 languages including English, French, Portuguese, Spanish, German, Italian, Chinese, Korean, Hindi, Arabic, Turkish, Vietnamese, and Finnish. For ESL students, or students who are drafting notes in their native language and writing in English, this is a meaningful practical advantage no other tool in this comparison matches.
Best for: students who want grammar checking integrated into a complete essay workflow, and ESL students who need multilingual support.
Grammarly is the most widely deployed grammar checker among students globally, and for good reason: it works everywhere. The browser extension brings grammar checking to Google Docs, Gmail, social media, online forms — anywhere you type in a browser. The Microsoft Word plugin handles academic document editing directly in Word.
The free plan catches grammar, spelling, and punctuation errors. The paid (Pro) plan adds advanced style suggestions, tone analysis, clarity rewrites, and vocabulary improvements.
Grammarly's accuracy is strong for standard grammar errors. Where it differentiates: the clarity and style suggestions that come with Pro are genuinely useful for academic writing — flagging wordy sentences, passive voice overuse, and clarity issues that a basic grammar check wouldn't catch.
Language support on the free plan is primarily English, with some support for Spanish, French, German, Portuguese, and Italian. Grammarly's detector also ranks #1 on the RAID independent benchmark for AI detection accuracy, which is relevant if you're using Grammarly both as a grammar checker and an AI detection tool.
Best for: students who work primarily in Google Docs or Microsoft Word and want grammar checking integrated directly into their writing environment.
QuillBot's Grammar Checker is free, requires no account, and produces no ads — making it one of the most accessible options for students who need a quick check without setup friction.
In accuracy testing against a 20-error passage, QuillBot identified all 20 errors, compared to 11 for Grammarly's checker in the same test. QuillBot also performs notably better on British English variants, which matters for students at UK or Australian universities.
The Grammar Checker connects directly to QuillBot's Paraphraser — a "Paraphrase Text" button moves flagged sentences to the paraphraser for improved phrasing. For students already using QuillBot for paraphrasing, this integration reduces workflow friction.
Language support includes English, German, French, Spanish, Brazilian Portuguese, Swiss German, and Dutch — solid for European students, more limited than Typely for other language regions.
Best for: students who want a completely free, no-account grammar checker with strong accuracy and no ads.
JustDone's Grammar Checker sits within a toolkit that includes AI detection, humanizing, plagiarism checking, and citation generation. For students already using JustDone for other parts of their essay workflow, the Grammar Checker is conveniently integrated.
The standalone grammar checking performance is solid for standard academic errors. JustDone's strength is in the combined workflow — particularly for students working with AI-drafted content who need grammar checking, AI detection, and humanizing as consecutive steps.
Best for: students already using JustDone's humanizer or plagiarism checker who want to stay in one platform.
This matters practically for students. Here's what you get free vs. paid on the main tools:
Typely — core grammar, spelling, punctuation checking available on the free plan.
Grammarly — basic grammar, spelling, and punctuation free. Style suggestions, full clarity rewrites, tone analysis, and plagiarism checking are Pro (paid) features.
QuillBot — full grammar checker free, no account required, no word limits. Paraphraser has a 125-word limit on the free plan.
JustDone — grammar checking available on paid plan; trial access available.
For students on a tight budget, QuillBot's free Grammar Checker + Typely's free plan together cover the full academic writing workflow without spending anything.
A common confusion: students sometimes run their essay through a grammar checker and assume it also checks for AI patterns. These are different checks.
Grammar checking catches linguistic errors — grammar, spelling, punctuation, style.
AI detection identifies patterns in the text that suggest AI generation — uniform sentence rhythm, specific vocabulary patterns, predictable transitions.
Running a grammar checker before submitting doesn't tell you anything about your AI detection score. They're separate tools that serve separate purposes.
If you need both — which most students using any AI writing assistance do — you need to run both checks. Typely's platform includes both the Grammar Checker and the AI Content Detector in one place, making this two-step process faster than using separate tools.
Grammar checkers perform differently for non-native English writers, and this is worth thinking about before you choose a tool.
Phrasing that sounds unnatural vs. technically wrong — a sentence can be grammatically correct but sound unidiomatic in academic English. The best tools for ESL students flag both types of issues, not just technical errors.
Native language support — if you take notes in French or write rough ideas in Arabic before translating to English, a tool that handles both languages in one platform is genuinely more useful.
Register and formality guidance — academic English has specific register conventions (avoiding contractions, specific transition language, formal vocabulary). Tools that flag informal phrasing in academic contexts help ESL students calibrate their register.
Typely's 13-language Grammar Checker is specifically designed to handle multilingual workflows and produces appropriate feedback for academic register — making it the strongest option for ESL students writing in English while thinking in another language.
One thing to avoid: accepting every grammar checker suggestion automatically. Grammar checkers occasionally flag stylistic choices as errors, or suggest changes that make a sentence technically correct but less clear. Always read before accepting.
Typely's Grammar Checker is available free at usetypely.com, alongside the full essay writing and checking toolkit.
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