10 Best Grammar Checkers of 2026

Grammarly remains the most complete grammar checker for people who write in many places at once. The free plan checks spelling and grammar, shows how your tone reads and gives 100 AI prompts, which is enough for many students. Pro, at $12 per member per month on annual billing, adds full-sentence rewrites, one-click tone adjustments, brand voice and 2,000 prompts a month. Teams of up to 149 people can share a style guide, brand tones, snippets and analytics, so a support or sales team uses the same terms. Grammarly says it gives real-time support in more than 20 languages and can translate inline, which helps non-native writers who switch languages. The weak spots are price and packaging. Monthly billing costs $30, more than double the annual rate, and governance features such as confidential mode and data loss prevention require Enterprise through sales. For most people who want corrections wherever they type, it is still the default choice.

LanguageTool is the strongest pick when English is not the only language you write in. The vendor lists English, German, Portuguese, Spanish, French and Dutch plus more than 30 other languages and dialects, and its English checks cover six regional varieties. The free version corrects spelling and simple punctuation. Premium adds enhanced grammar, punctuation and style checking, raises the limit to 150,000 characters per text field and includes unlimited AI paraphrasing and a style guide add-on. Coverage of apps is broad: browser add-ons for Chrome, Edge, Firefox and Opera, email add-ons for Gmail, Apple Mail and Thunderbird, and plugins for Google Docs, Word, Apple Pages and LibreOffice. Team plans add user management, a team style guide and a team dictionary. Our location showed only PLN prices, so the USD price is pending. Pick it for multilingual work; pick Grammarly if you write only in English and want more rewrite tools.

QuillBot is built around rewriting, and that makes it a strong second tool for students. The free plan paraphrases up to 125 words in two modes, fixes basic grammar, generates basic summaries and gives limited AI detection. Premium unlocks full paraphrasing in nine built-in modes plus custom modes you define, advanced grammar suggestions, tone insights, and a plagiarism checker with 25,000 words a month. The same plan includes the AI detector, humanizer and summarizer, so a student can rewrite, check and cite without switching services. Grammar correction works in six languages and the paraphraser in 23. It runs as extensions for Chrome, Edge and Safari, a Word add-in, a macOS app and mobile apps. Our location showed euro pricing only, so the USD price is pending. As a pure grammar checker it is lighter than Grammarly, but the bundle is good value if you paraphrase often.

ProWritingAid goes deeper than most grammar checkers on style. Beyond grammar, spelling and punctuation, Premium includes more than 25 analysis reports that look at readability, structure, overused words and sensory detail, plus a custom style guide, a custom dictionary and author comparison. You can set one of 40+ document types to tune the suggestions. The free plan is tight: each line editing report runs twice a day on 500 words, with 10 rephrases daily. Premium costs $10 per month billed yearly at $120, or $30 monthly, and a lifetime license starts at $399. The product has moved toward fiction. Story Canvas, Outline Crafter, Chapter Critique and community workshops are aimed at novelists, so a student or office writer pays for features they may not use. If you write books or long reports and want to study your own habits, it is excellent value on yearly billing.

Wordtune is less a rule-based checker than a sentence rewriter, and that suits writers working in a second language. Every plan, free included, has unlimited spelling corrections and grammar checks. The value is in rewrites: the free Basic plan gives 10 rewrites and AI suggestions a day, Advanced raises that to 30 at $4.89 per month billed annually, and Unlimited removes the cap and adds vocabulary, clarity and fluency improvements at $6.99 per month billed annually. Summaries of text and video are included, with 3 a month free and 15 on Advanced. Students, educators and nonprofit staff can get 30 percent off. The downsides are the daily caps and a strict policy: Wordtune does not offer refunds. It also lacks the team style guides of Grammarly. If your grammar is mostly fine but your sentences sound stiff, Wordtune fixes that cheaply.

Trinka is the specialist for academic English. Its checks follow APA, AMA, ACS, AGU and IEEE style guides, and it adds technical spell check, consistency checks and inclusive language checks that general tools skip. Premium, at $48 a year, opens full writing assistance, all paraphraser modes and proofreading of Word and LaTeX files returned with tracked changes. Premium Plus at $75 a year adds file translation into 30+ languages and 240 pages a year of standard plagiarism checking. Researchers handling sensitive material can buy the Confidential Data plan at $300 a year, which includes an offline grammar checker, instant data deletion and no AI training on your text. The free Basic plan allows 5,000 words a month, which covers a short paper but not a thesis. Plagiarism, AI detection and citation tools mostly run on credits. For journal papers written by non-native authors, it is the best value here.

Hemingway Editor is about readability more than error hunting. The free online editor colors hard-to-read sentences, wordiness and passive voice and gives a reading grade, which teaches you to write shorter sentences. Hemingway Editor Plus adds AI on top: instant rewrites of wordy sentences, advanced grammar fixes, document feedback, AI synonyms, a style guide and eight styles such as more formal or more persuasive. The Individual 5K plan costs $8.33 per month billed annually, or $100 a year, for 5,000 AI sentences a month, and the 10K plan costs $12.50 per month. Teams of up to 50 pay per seat. The vendor says neither it nor its AI providers train on your writing and that it does not store documents. The classic desktop app is a one-time $19.99. It does not follow you into email or chat the way Grammarly does, so treat it as a second pass on important drafts.

Microsoft Editor is the checker many people already have. With a free Microsoft account you get basic spelling and grammar in Word for the web, Outlook, Microsoft Edge and the Edge or Chrome browser extension. Microsoft says it works in more than 20 languages. A Microsoft 365 subscription turns on advanced refinements for clarity, conciseness, formality and vocabulary. You cannot buy Editor premium alone; it comes with Microsoft 365 Personal at $9.99 per month, which also includes the Office desktop apps, Copilot features and 1 TB of storage, so the value depends on whether you want those too. Microsoft's support page says text sent from Edge for spelling and grammar checks is not stored and is deleted after processing. Compared with Grammarly it has fewer tone and rewrite tools and weaker coverage outside Microsoft apps. If you live in Word and Outlook, it is a sensible, low-friction choice.

Sapling is a grammar checker designed for teams that write to customers all day. The free plan gives basic suggestions, 20 snippets and AI detection up to 2,000 characters per check, and works in Chrome, Google Docs, Outlook and Word. Pro, at $12 per month billed annually or $25 monthly, adds advanced suggestions, Autocomplete Everywhere, Rephrase, unlimited snippets and unlimited use on premium domains. New accounts get a one-month Pro trial without a card. Enterprise starts at 10 seats and $15 per seat per month, and adds chat assist, team analytics, conversational insights, SSO and SCIM, custom integrations and a self-hosted option. A usage-based API and an MCP server let developers add grammar and AI detection to their own tools. For a single student it offers less than Grammarly, but for a support desk that wants autocomplete and shared snippets with admin controls, it fits well.

Ginger is the low-cost option for English learners. It corrects whole sentences in context, covering grammar, spelling and phrasing, and Premium adds unlimited rephrasing with synonyms, tone variations and an English dictionary. Translation into more than 40 languages helps non-native writers check meaning as well as grammar. It runs in Chrome and Edge, on macOS and Windows, on iOS and Android, and inside Google Docs and Microsoft Office on Windows. Under the current 50 percent promotion, Premium costs $45 for a year, which works out to $3.75 per month, or $6.50 billed monthly; students and teachers can get 70 percent off after an eligibility check. There is no free trial, only a free version and a 7-day money-back guarantee. The feature set is narrower than Grammarly's, with no team style guides or AI drafting. If you want inexpensive corrections and translation, it does the job.