40 Trending Grammar Checking App Businesses [2024]

Updated: January 18th, 2023
Start A Grammar Checking App Business

Looking for some examples of a grammar checking app business?

Interested in case studies of a successful grammar checking app business? Check out our full list of success stories.


Millions trust Grammarly’s free writing app to make their online writing clear and effective. Getting started is simple — download Grammarly’s extension today.

Where they're located: Fresno, California, USA
Website traffic: 66.7M/month


2. QuillBot

QuillBot's paraphrasing tool is trusted by millions worldwide to rewrite sentences, paragraphs, or articles using state-of-the-art AI.

How much they make:
Where they're located: Chicago, IL, USA
How much did it cost to start: $1K
Current team size: 67
Website traffic: 13.6M/month


Learn more about starting a grammar checking app business:

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4. Citation Machine®: Format & Generate

Citation Machine® helps students and professionals properly credit the information that they use. Cite sources in APA, MLA, Chicago, Turabian, and Harvard for free.

Website traffic: 4.53M/month


5. EasyBib®: Free Bibliography Generator

Automatic works cited and bibliography formatting for MLA, APA and Chicago/Turabian citation styles. Now supports 7th edition of MLA.

Where they're located: Nashville, Tennessee, USA
Website traffic: 4.7M/month


6. Ginger Software

Powerful and effortless desktop & mobile solutions for improving your writing and productivity. Ginger Software is your personalized editor - everywhere you go.

Website traffic: 2.87M/month


7. GrammarCheck.net

Now you can grammar and spell check any text or document online. Simply copy and paste your text onto our website to proofread, review, and correct it.

8. English Grammar Online

Learn English online - Free exercises and explanations, tests, vocabulary, teaching materials on English as a foreign language

Website traffic: 1.94M/month


9. PaperRater

PaperRater uses Artificial Intelligence to improve your writing. Includes grammar, plagiarism, and spelling check, along with word choice analysis and automated grading.

Where they're located: Birmingham, Alabama, USA
Website traffic: 510K/month


10. Quill.org

Quill provides free writing and grammar activities for middle and high school students.

Website traffic: 170K/month

11. Apponic

Free Downloads - Discover and Download BEST, FREE Software, Apps, and Games for Windows, Mac, and Android on apponic.

Where they're located: South Australia, Australia
Website traffic: 590K/month


12. Linguix Free Writing Assistant

Use Technology, Be a Better Writer. Find and eliminate spelling and grammar issues in your writing anywhere on the web with the help of our AI-based algorithm

13. Free, Powerful English Grammar Checker

Scribens is a free online Grammar Checker that corrects over 250 types of common grammar, spelling mistakes and detects stylistic elements such as repetitions, run-on sentences, redundancies and more.

14. WhiteSmoke

WhiteSmoke software products for writing and language. WhiteSmoke is a grammar checker, spell checker, style checker and more - in a single package. Also featuring translation software and English video courses.

Website traffic: 250K/month


15. Grammar.com

16. Slick Write

Slick Write is a powerful, FREE application that makes it easy to check your writing for grammar errors, potential stylistic mistakes, and other features of interest. Whether you're a blogger, novelist, SEO professional, or student writing an essay for school, Slick Write can help take your writing to the next level.

Where they're located: Anaheim, California, USA
Website traffic: 110K/month


17. Sapling

Sapling AI writing assistant for customer-facing teams. Sapling sits on top of CRMs and messaging platforms to help agents more efficiently compose personalized responses.

18. Free Online Grammar Checker ~ Grammar Check.me

Grammar check your writing, find errors in grammar, spelling and writing style. Instant feedback on problems and suggestions on how to fix them.

Where they're located: Long Beach, California, USA


19. Free Plagiarism Checker

The most accurate plagiarism checker tools for students, teachers, and SEO professionals. 100% free plagiarism detection and duplicate content checker software.

20. SentenceCheckup.com

Free Sentence Checker! Copy & Paste your text to check for the run-on sentences, and fragments. Check Your Writing for mistakes, Try Now!

21. eangel.me

Human proofreading, grammar and spelling correction service. We correct emails, websites, articles and other texts. Free trial.

22. checkgrammar.org

Check Grammar is an online tool to find grammatical mistakes and punctuation errors in your sentences.

23. Email Writing AI Coach Application

24. Grammarly Check

A simple site for checking copy with Grammarly.


26. InstaText

How much they make: $600K/year
Where they're located: Ljubljana
How much did it cost to start: $50K
Current team size: 4
Website traffic: 310K/month

Our AI Writing Tool Won 'Startup Of The Year' And Has Customers In More Than 150 Countries

InstaText is an AI-based online writing assistant that helps non-native speakers improve their English, with over half a million active users from 150 countries worldwide, bootstrapped from $0 to $50k monthly revenue in two years and quadrupled their sales in 2021, becoming Slovenian Startup of the Year and expanding to web applications and browser extensions.

Read by 3,706 founders

27. WProofreader professional business grammar & spell checker

Secure, spell, grammar & punctuation checker for businesses and individual users. WProofreader offers online and offline setup | English, German, French, Spanish +160 more languages.

28. Free Grammar Check Tool Online

Want to be sure that your paper is grammatically correct and 100% unique? Check it out with a professional grammar & spell checking tool.

29. Beewriter

Beewriter is a writing assistant and grammar checker that thinks of suggestions and ideas to help you find the perfect words to express yourself.

30. Free Grammar Checker

Grammar checker online and for Mac. Check your grammar, spelling, punctuation. The Best grammar checker free.

31. Paper Editing & Professional Proofreading Service

Fast, professional and affordable English editing from PhD editors - 24/7 editing for essays, research papers and manuscripts.


32. Grammar Check

Grammar Check is a free tool to check and correct errors from the text including grammatical, spelling and punctuation mistakes. Multi-language tool.

33. Software for Writers Plain English Grammar Checker Editor

Software for Writers - Plain English Grammar Checker Spellchecker -Editor Software - for MS Word StyleWriter 4 improves how to edit like a professional editor.


34. English Grammar Punctuation App

Try English grammar punctuation app and see its benefits yourself. Correct My Punctuation App can check punctuation errors in a blink of an eye 👀 You will get free online grammar and punctuation corrector without spending any money. Its quick, simple and free, what else can you ask for?

35. Grammar Software |

Improve your English writing Includes everything you need to proofread, check, and correct text. Patented grammar check engine Grammar Checker Correct sentence structuring mistakes Sentence Checker Featuring NLP technology Spell Checker Detect difficult punctuation mistakes Punctuation Checker Includes a huge library of words/expressions Dictionary Watch while the program does the job for you Auto Correct […]

36. GrammarChecks.com – Free Online Grammar Check!

Unlimited translation of English to Spanish language sentences. Spanish Translator. Translate free online!

37. Spell Check Online

Here you can grammar and spell-check any length of text online. Simply copy and paste your text into our spell checker to find and correct writing mistakes.


38. Grammarcorrector.net

Grammar Corrector is best online tool to check grammar and correct spelling mistakes in sentences for your text and articles.

39. Grammar Check Software

Grammar-check, proofread, and correct any English text or document and find the most difficult to spot mistakes. Start writing professional, rich, and accurate English. Works online, in any program, or in your favorite internet browser.