Apps similar to Harper include LanguageTool, which is open source with a free version. Other options are Grammarly, DeepL Write, Grammit and GrammarMama. There's no shortage of Grammar Checkers like Harper, with more than 50 alternatives for the web, Mac, Windows, Linux and iPhone.
Ginger Keyboard is the world’s first smartphone keyboard to offer advanced writing tools, including live as-you-type proofreading, alongside standard and advanced keyboard features like word prediction, autocorrect, emoji and swipe typing.
Israel
Whether you’re writing a letter or an email, a simple click of a button will open some of the most comprehensive and useful language resources ever created.
Canada
Highlights potential pitfalls in your writing to encourage good habits.
United States
An AI-powered writing assistant that helps users create, structure, and improve content efficiently. Perfect for students, professionals, and creators looking to boost productivity and clarity.
Corrector App is a free grammar checker created by Grammar Buddies LTD. With this free tool, you can check the grammar of your homework, e-mails or presentations before handing them in. Corrector App is available without download in a web-based version or can be downloaded on...
United Kingdom
A comprehensive suite of English language tools, courses, and resources, all in one platform, for those who use the English language every day.
RewritePal is a free, AI-powered tool designed to make your writing clear, compelling, and tailored to any audience. Whether you're a student, professional, or content creator, RewritePal helps you transform paragraphs into polished, reader-friendly text in seconds.
We use artificial intelligence and natural language processing technology to find your writing errors and offer smart suggestions.
United States
Write with confidence across documents, email, and the web. With features that help strengthen your spelling, grammar, and style, let Microsoft Editor be your intelligent writing assistant.
United States
Writefull is automated proofreading for academic writing, with AI language models trained on millions of published journal articles across all academic disciplines. Its language check provides tailored suggestions for academic texts across grammar, spelling, vocabulary...
Netherlands
EU
Grammark helps improve writing style & grammar and teaches students to self-edit. Basically, it finds things that grammarians consider bad, highlights them, and suggests improvements.
Wordvice AI Proofreader is an all-in-one editor and writing tutor that makes context-based suggestions to improve your vocabulary and enhance your style.
South Korea
