There are numerous open-source writing and editing tools available that offer functionalities similar to Antidote. While they may not provide the exact same features, they can serve as effective alternatives.
Antidote is a renowned French language and grammar checker developed by Druide Informatique Inc. It's widely used by students, professionals, and writers to improve the quality of their French texts. Antidote offers a range of tools, including a spell checker, grammar checker, style checker, and a dictionary.
: Druide (the developer) occasionally offers trial periods or demo versions so you can test the features before buying. Antidote+ Subscription
If you're looking for a free or affordable solution, consider the following alternatives: