Apps similar to ProWritingAid include LanguageTool, which is open source but paid. DeepL Write and Harper are free. Other options are Grammarly, Grammit, Doco and Refine. You're spoiled for choice with Grammar Checkers like ProWritingAid: we list more than 100 alternatives for the web, Mac, Windows, iPhone and Android.
Become a better writer with Outwrite. Our AI writing assistant is more than just a grammar checker — it helps turn your ideas into powerful sentences.
A privacy-focused Microsoft Word add-in that highlights mechanical writing patterns, overused phrases, and formatting inconsistencies so users can edit and polish text in their own voice.
Cyprus
EU
Grammar Fix is 100% free and it's here to help you understand and avoid the 10 most common grammar mistakes in as little as 10 minutes each.
AI Slop Index (ASI) is VibeAxis’s open method and toolset for scoring synthetic-sounding content. It flags vague quantifiers, passive voice, credulous claims, and other slop signals, then rolls them into a transparent score. MIT-licensed components; zero tracking.
United States
Work with long documents and datasets in your browser: gather everything a document says about a topic, code interviews, build concept maps and logic models, with optional AI.
Paraphrasing is a free Chrome extension that leverages AI power to rephrase, reword, and rewrite your content
ScribeGlow is an AI-powered line editing and proofreading service designed for self-published authors. You can upload your .docx manuscript and have it returned in minutes. Every suggested edit is marked in Track Changes.
United States
ReverseGPT is an AI writing suite built around one job: taking an AI draft and making it read like human writing, without losing the meaning.
Boosts Word with more than 100 AI-driven tools for proofreading, rewriting, translation, redacting sensitive content, batch find and replace, document splitting, multi-file editing, Doc/Docx conversion, interactive checkboxes, and easy in-ribbon access to all features.
China
PlagiCheck is a free Windows application capable of performing extensive searches on the Internet and various databases to check the quality of text by analyzing the percentage of plagiarism, paraphrasing, and similar content.
Canada
Scramble is an open-source Chrome extension that leverages AI to enhance your writing directly in your browser. It's designed to be a more customizable and privacy-respecting alternative to Grammarly.
