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 | Utilisateurs soucieux de confidentialité, développeurs, étudiants, professionnels ayant besoin d'outils PDF/image/audio ponctuels sans upload cloud | — | |
| 3 | Équipes support client, équipes commerciales (qualification de leads), IT helpdesk, agences gérant plusieurs clients | — | |
| 4 | Travailleurs du savoir, chercheurs, développeurs et utilisateurs d'outils IA qui veulent garder la propriété de leurs notes tout en gardant une recherche sémantique puissante | — | |
| 5 | Professionnels manipulant des conversations confidentielles (juridique, santé, sous NDA) et personnes ayant besoin de transcription en temps réel (TDAH, autisme, troubles auditifs) | — | |
| 6 | Étudiants, indie hackers, freelances et personnes qui sur-planifient et ont besoin d'un mécanisme d'engagement pour respecter leurs deadlines | — | |
| 7 | Utilisateurs Mac individuels (Apple Silicon) qui veulent des notes de réunion privées sans bot ni cloud, et sans abonnement récurrent | — | |
| 8 | Fondateurs, équipes commerciales, finance et professionnels qui veulent un assistant IA email sans lui donner accès à leur boîte de réception | — | |
| 9 | Fondateurs, CEOs et team leads gérant des équipes distantes ou mixtes (humains + agents IA) qui veulent un suivi de livraison vérifié plutôt que des statuts auto-déclarés | — | |
| 10 | Particuliers planifiant un événement ponctuel (mariage, déménagement, voyage) qui veulent une checklist rapide sans créer de compte | — | |
| 11 | Petites équipes et startups (10-50 personnes) qui veulent remplacer plusieurs outils RH/culture séparés par un seul abonnement | — | |
| 12 | Windows users who want to dictate emails, messages, code comments or documents instead of typing, including people who type slowly or have wrist/RSI issues | — |
#1
#2
Most free online PDF or image converters make you upload your file to someone else's server, which is a bad idea if the file has anything sensitive in it. TabTasker is a toolbox of 50+ small utilities — merge a PDF, compress a photo, transcribe audio, for
tabtasker.com
- ✓ Zéro upload — traitement 100% local
- ✓ Plus de 50 outils en un seul endroit
#3
A lot of customer questions are already answered somewhere in your docs or FAQ — the problem is nobody reads them before emailing support. Owlish reads your documentation for you and turns it into a chat agent that answers customers directly, shows exactl
owlish.bot
- ✓ Réponses toujours citées avec la source exacte
- ✓ Handoff humain avec seuil de confiance réglable
#4
A normal note-taking app only finds what you wrote if you remember the exact words you used. Atomic reads the meaning of your notes instead, so asking "what did I decide about pricing last month" can surface the right note even if you never typed the word
atomicapp.ai
- ✓ Auto-hébergement pris au sérieux (binaire léger + SQLite)
- ✓ Recherche sémantique par sens, pas juste mot-clé
#5
A native Mac app built by one developer that records and summarizes meetings entirely on your machine — useful if you handle confidential conversations or just find real-time transcripts help you follow along.
thoth-app.com
- ✓ 100% sur l'appareil, aucune donnée envoyée au cloud
- ✓ Rédaction automatique des informations sensibles
#6
Drop your to-do list in as plain text and AI slots every task into your actual week — around sleep, meals and fixed events — with a real money penalty if you blow a deadline anyway.
nudgetaskai.com
- ✓ Money Lock : pénalité financière réelle pour respecter les deadlines
- ✓ Replanification automatique quotidienne (Dawn Sweep)
#7
A Mac app that turns your voice or a meeting into text and summaries entirely on your own computer — no bot joining the call, nothing uploaded to the cloud, and no subscription.
quickquill.app
- ✓ 100% sur l'appareil, aucune donnée envoyée dans le cloud
- ✓ Aucun bot ne rejoint l'appel
#8
An AI assistant that lives at its own email address — CC it on a thread or forward it a task, and it handles the reply, without ever getting a password to your actual inbox.
hellodeck.ai
- ✓ Aucun accès direct à la boîte de réception, fonctionne par CC/transfert uniquement
- ✓ Certifié SOC 2 et conforme RGPD
#9
A tool that checks what your team says it shipped against what actually happened in GitHub and Linear, then sends you one honest daily report instead of a weekly status call.
eodly.io
- ✓ Vérifie les statuts déclarés contre l'activité réelle GitHub/Linear
- ✓ Rapport quotidien unique, plus rapide qu'un point hebdomadaire
#10
Type what you need in plain English — a wedding, a move, a trip — and get a ready-to-print PDF checklist in about 30 seconds, free and without an account.
checklistfox.com
- ✓ Gratuit y compris l'export PDF, sans compte requis
- ✓ Génération de checklist par IA en langage naturel
#11
One app that bundles the small tools a growing team usually buys separately: calendars, feedback, recognition, on-call schedules and internal announcements.
orgorg.com
- ✓ Remplace plusieurs outils RH/culture séparés pour un prix unique
- ✓ Natif Google Workspace avec intégrations Slack/Gusto/Rippling
#12
A free Windows app that turns your spoken words into clean, correctly formatted text in whatever app you're typing into.
wisproapp.com
- ✓ Entièrement gratuit, sans compte requis
- ✓ Fonctionne dans 100+ applications Windows existantes
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.