Grammarly, Antidote or LanguageTool: which spell checker to choose to write in French in 2025?

You've been correcting your manuscript for hours… and you're still not sure you have the best French spell checker?

You just reread your chapter for the fourth time. You feel like you've checked everything. And yet, that little voice inside whispers to you: What if I let a mistake slip through? What if your editor, your beta reader, or even your next reader stumbles on an embarrassing typo on page 3?

We've all been there. Writing a book is already a huge challenge. But correcting that book — really correcting it, rigorously, without spending your entire life on it — that's a different battle. And when you find yourself faced with tools like Grammarly, Antidote or LanguageTool, you no longer really know which one to choose to work peacefully in French.

Good news: this comparison is made for you. We're going to break down these three tools together, honestly, without unnecessary technical jargon. And at the end, you'll know exactly which one will suit your writing project best.

Why choosing the right French spell checker can change the way you write

Before diving into the comparison, let's talk about a reality many beginner authors live in silence: the fear of writing poorly slows down writing itself.

How many times have you found yourself rereading a sentence instead of advancing your story? Doubting the agreement of a past participle to the point of losing the thread of your narrative? That's not a lack of talent. It's a lack of tools — and sometimes, a good companion on the road beside you.

A good spell checker is a safety net. It frees your mind so you can focus on what matters: your story, your characters, your ideas. So let's see what the three big names in the market have to offer.

Grammarly vs Antidote vs LanguageTool: the honest comparison for French-speaking authors

Grammarly: powerful in English, limited in French

Grammarly is probably the most well-known tool in the world. Its interface is elegant, its suggestions are contextual, and its integration with most text editors is stunning. But here's the catch:

• Grammarly is designed first and foremost for English. French support is partial and noticeably less accurate.
• The grammatical nuances of French — complex agreements, subjunctive, tense consistency — often slip through the cracks.
• The free version is very limited; the premium version runs around $12 to $30 per month depending on the plan.

Verdict: If you write primarily in English or need a tool for bilingual professional emails, Grammarly is excellent. For a manuscript in French, it's not the right choice.

LanguageTool: the free and open source option

LanguageTool is an open source alternative that supports over 30 languages, including fairly solid French. It integrates easily into browsers, Word, LibreOffice and even Google Docs.

• Free version available, which is a significant advantage for authors starting out without a budget.
• Detection of grammar and spelling mistakes in French is decent, though less precise than Antidote on complex cases.
• The premium version (around $5 to $20 per month) unlocks stylistic suggestions and a higher character limit.
• Ideal for short texts or quick corrections; less suited for an 80,000-word manuscript with high stylistic requirements.

Verdict: A very good starting point if you want to launch without investing. Perfect for correcting as you go, but you might feel its limitations on a long literary text.

Antidote: the king of French spell checkers

Antidote is the absolute reference for French-speaking authors, journalists, translators and writing professionals in Quebec, France and Belgium. Developed by Druide informatique, it was designed for and by people who take French seriously.

• Ultra-precise grammatical correction : it detects subtle agreements, contextual homophones, anglicisms and redundancies.
• Built-in dictionaries (synonyms, definitions, collocations) that truly enrich your vocabulary.
• A Complete language guide to understand why a rule applies, not just to correct it blindly.
• Compatible with Word, Pages, Scrivener, Outlook and many others.
• The price: approximately $119 as a one-time purchase or a subscription starting from $7 per month via Antidote Web.

Verdict: If you're writing a novel, an essay or a book in French and want the best correction tool possible, Antidote is an investment worth making. It's simple.

Quick summary table

Correcting is good. But writing first is better.

You now have a clear view of the best French spelling checker according to your budget and needs. But here's a question that few tools dare to ask: is your manuscript actually moving forward?

Because correcting a blank page or a chapter abandoned after three weeks is pointless. The real challenge for beginner authors is not just spelling — it's structuring your ideas, overcoming blocks and continuing to write despite your doubts.

That's exactly where Plumence.

Plumence is a writing assistant designed for authors like you. It doesn't pick up the pen on your behalf — it's your story, your voice, your vision. But it helps you to:

• Structure your outline when you don't know where to start.
• Rephrase a sentence or passage that seems off to you, to find the wording that fits you.
• Move forward concretely chapter after chapter, without getting lost in doubt or procrastination.
• Keep the thread of your story over time, even when life gets in the way.

Imagine: you use Antidote to correct your text with precision, and Plumence to make sure you actually have a text to correct. The two tools complement each other perfectly. You can learn more about how Plumence supports authors in their creative process on our blog dedicated to writing.

Ready to write the book you carry within you?

You have the subject. You have the desire. You may even already have a few pages somewhere in a drawer or a forgotten file. What you're missing is a space to move forward without pressure — with a supportive assistant who believes in your project as much as you do.

Try Plumence free and discover how to structure your book, move at your own pace and rediscover the pleasure of writing. Because your story deserves to be finished — and read.

✍️ Start writing with Plumence — for free