Harper vs Wordvice AI

Harper is a free, open-source grammar checker that flags capitalization, spelling, awkward phrasing, and grammar errors. The maker says checks run locally, with no cloud round-trips, telemetry, or LLM in the loop, and that suggestions appear in under 10 ms. Harper is available through browser and editor extensions, a language server, a JavaScript library, a Rust crate, and native apps. Listed integrations include Chrome, Brave, Edge, Firefox, VS Code, Cursor, Obsidian, WordPress, Neovim, Zed, Helix, Emacs, and Sublime Text. Its language support covers English and British, American, Canadian, Australian, and Indian English dialects. Harper Desktop lets users toggle rules, add dictionary entries, select a dialect, and turn checking on or off per app. The desktop app is labeled beta for macOS 14 or later, and the Windows desktop app is also described as a beta; its binary was not signed at the time of the listed post. Harper is free, with no account or credit card required.

Wordvice AI is an online writing tool for students and academic writers, with proofreading and grammar checking at its core. Its other tools cover paraphrasing, humanizing, translation, summarization, plagiarism checking, AI detection, rewriting, and document editing. The proofreader checks grammar, spelling, punctuation, and style, and can explain revisions with comments. Users can choose Light, Standard, Intensive, or Concise proofreading modes; Intensive and Concise are locked in the free interface. The Basic plan allows 5,000 words per month and up to 500 words per submission. Premium raises those limits to 1,000,000 words monthly and 20,000 per submission, with pricing from $9.95 a month billed annually. Wordvice AI runs on the web, macOS, Windows, and as an extension. It also offers a Microsoft Word add-in for Word 2021 and newer, Microsoft 365, and Word Online on Windows and Mac. Its Chrome extension translator supports 47 languages. Team plans add shared Premium access, member management, centralized billing, and owner, admin, and member roles. Human editing by professional editors is also available after AI proofreading.