Dev tools · alternatives · 2026
24 alternatives to Harper, an Offline Grammarly Alternative
Harper is a blazing-fast, open-source grammar & spell checker that runs entirely on your device, covering US, UK, Canadian, Australian & Indian English—no data ever leaves your machine. Harper is the only grammar checker that doesn
Harper is a grammar and writing tool that works offline, designed as an alternative to Grammarly. It launched in November 2024 and helps users improve their writing without requiring internet connectivity. The tool is… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Harper, an Offline Grammarly Alternative launched in 2024; newer entries below may have overtaken it.
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Clear, effective, mistake-free writing everywhere you type.
2014 · grammarly.com · its alternatives →
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Fix grammar, rewrite sentences, translate text, and get clear explanations across your Mac apps. Do it all offline with local AI.
2025 · refine.sh · its alternatives →
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GrammarBot▲183Write flawless English with AI, no subscriptions, offline
2024 · grammarbot.app · its alternatives →
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Grammarly launches new iOS keyboard for better writing
2017 · apps.apple.com · its alternatives →
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Free AI-powered spelling, grammar, and punctuation checker
2019 · perfecttense.com · its alternatives →
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Hey HN, I wanted a grammar checker that didn’t send my writing to someone's servers, so we built Grammit, a Chrome extension that runs grammar checks locally using an LLM. Your text never leaves your computer during checking. Here’s a 2-minute overview: https://www.loom.com/share/baf501ee6cf14a919a7384128246ed67 Because it uses an LLM, it catches more than spelling and grammar. For example, it can correct some wrong statements like “The first US president was Benjamin Franklin.” Grammit also includes an in-page writing assistant that can rephrase or draft new text. It…
2025 · chromewebstore.google.com · its alternatives →
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Write confidently across desktop apps and websites
2021 · grammarly.com · its alternatives →
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Free Grammarly Alternative sentence & spell Checker tool.
2018 · grammica.com · its alternatives →
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Quick grammar, punctuation, and spelling checker. Free, no ads, no sign-up. Paste up to 1000 words, get instant suggestions with explanations. Built for writers who need fast, accurate checks without friction. One-click corrections with grammar checker results. Feedback welcome—what features would make it more useful?
Jul 2026 · grammarchecker.ai · its alternatives →
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Spelling and grammar correction embedded on your website
2019 · perfecttense.com · its alternatives →
- 20TC
2011 · textlaundry.com · its alternatives →
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Instantly check grammar, punctuation, and spelling errors with LanguageTool's AI-powered grammar checker. Enhance your writing in over 30 languages with ease.
2019 · languagetool.org · its alternatives →
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Grammify▲54Open source Grammarly alternative, using your own OpenAI API
2023 · docs.google.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →