Correcteur multi-langues open source
🌐 web🪟 win🍎 mac
languagetool.org
Alternatives to
Harper
Best alternatives to Harper in 2026
Most grammar-checking tools, including well-known ones, send everything you type to a company's servers to be analyzed, which means your private notes, drafts and messages pass through someone else's infrastructure. Harper checks your grammar entirely on your own device, with no internet connection required and nothing ever leaving your computer, while still being fast enough to correct as you type. Harper is a free, open-source (Apache 2.0, ~13,100 GitHub stars) offline grammar checker built by Automattic (the company behind WordPress.com), written in Rust for millisecond-speed linting with a memory footprint reported to be about 1/50th that of LanguageTool, a popular alternative. It compiles to WebAssembly for browser use and integrates with a wide range of editors and apps including VS Code, Neovim, Helix, Emacs, Zed, Obsidian and Chrome.
Quick comparison of Harper alternatives
| # | Tool | Best for | Price |
|---|---|---|---|
| 1 | Étudiants | Professionnels | — | |
| 2 | Étudiants, professionnels, créateurs gérant des fichiers personnels dispersés entre plusieurs apps | — | |
| 3 | Mac users needing quick visual explanations: bug reports, design feedback, async team communication | — | |
| 4 | Knowledge workers who draft a lot of text daily (engineers, PMs, writers) | — | |
| 5 | Mac users wanting remote control, extended display, or game-streaming from an iPhone/iPad | — | |
| 6 | Small business owners in restaurant, cleaning, construction, lawn care, salon, and retail trades | — | |
| 7 | Individuals wanting a frictionless single inbox for ideas, tasks, and links | — | |
| 8 | Professionals, founders, and consultants who prioritize presentation speed over design polish | — | |
| 9 | Individuals wanting transparent, self-hostable personal finance tracking | — | |
| 10 | Privacy-conscious professionals wanting local AI meeting notes | — | |
| 11 | Researchers and knowledge workers wanting local-first AI note-taking | — | |
| 12 | Rédacteurs, développeurs et organisations voulant un traitement de texte libre, léger et multiplateforme sans dépendance propriétaire | — |
#1
#2
An offline file manager that pulls the files scattered across your photos, downloads, chats and email into one searchable place, entirely on your device with no cloud sync.
pouchverse.com
- ✓ Fonctionne entièrement hors-ligne, sur l'appareil, sans cloud
- ✓ Recherche avancée jusque dans le texte des photos et des enregistrements audio
#3
Mac app for voice-annotated screenshots, screen capture with editing, and local clipboard history, all processed on-device.
assistapp.dev
- ✓ 100% local processing, nothing uploaded to the cloud
- ✓ One-time $20 purchase, no subscription
#4
Mac/Windows voice dictation app that turns speech into polished, formatted text at your cursor in any app.
theloqua.ai
- ✓ Auto-formats output (lists, headings) instead of raw transcription
- ✓ Removes filler words automatically
#5
Turns an iPhone or iPad into a low-latency trackpad, game controller, and extended display for controlling a Mac remotely.
touchmac.app
- ✓ Ultra-low 8ms median latency on local network with 60fps 1080p streaming
- ✓ Completely free forever for local network use, no account required
#6
Free collection of 31+ business calculators for restaurant, cleaning, construction, lawn care, salon, and retail owners.
mainstreettoolbox.com
- ✓ Completely free with no signup or ads
- ✓ Mobile-first design for use on the job site or shop floor
#7
Capture app for everything you save 'for later' — text, voice, links — that auto-organizes and resurfaces items when useful.
laterbot.app
- ✓ Frictionless capture — text, voice, links — with zero manual filing
- ✓ Voice capture includes automatic transcription and AI summaries with action items
#8
Free AI tool that generates a full PowerPoint presentation in under a minute from a topic, file, URL, or transcript.
generateppt.com
- ✓ Generates a complete presentation in under 60 seconds
- ✓ Completely free app — you only pay OpenAI for your own API usage
#9
Open-source personal finance app that connects 10,000+ financial institutions and uses AI to answer questions about your money.
sure.am
- ✓ Fully open-source with self-hosting option for complete data control
- ✓ Connects to 10,000+ financial institutions automatically
#10
Open-source AI meeting note-taker that transcribes locally, without a bot joining your call.
prismical.ai
- ✓ Free and open source (MIT)
- ✓ Local-first transcription — no bot joins the call
#11
Open-source browser and AI notebook combined, with local-first data storage.
deta.surf
- ✓ Local-first data storage — files and embeddings stay on your device
- ✓ Bring-your-own-model/API-key flexibility
#12
A free, open-source word processor built from scratch in C, meant as a modern alternative to Microsoft Word and AbiWord, running on Windows, macOS and Linux.
word42.org
- ✓ Fully free and open-source (GPL-3.0)
- ✓ Cross-platform (Windows/macOS/Linux) with consistent UX
FAQ about Harper alternatives
- What is the best alternative to Harper in 2026?
- Based on our selection, LanguageTool is the best alternative to Harper in 2026. Correcteur multi-langues open source. See our full ranking above to compare all options.
- Is Harper free?
- Harper is a paid tool. Several alternatives in our selection offer free or freemium versions.
- How many alternatives to Harper are there?
- mySelectas has listed 12 alternatives to Harper in the SaaS & Productivity category. Our selection is updated regularly to include the best options available.