LanguageTool is a popular AI-based grammar checker. It is available as a free — limited — version and a premium version that offers more features for a price.
Free LanguageTool users were limited in several ways since the introduction of the service. It lacked the advanced spell, style and grammar checking capabilities of the premium version. However, up until now, free users could use LanguageTool browser add-ons for deeper integration in web browsers.
This integration is being taken away. When you open the comparison of the free and premium version on the official website, you will notice that Learneo, Inc, the owners of the service, have removed browser add-ons support for free users.
The only integration that remains available is for the open source email client Thunderbird. Support for every browser listed on the page requires a premium subscription now.
Why is LanguageTool making the change? The company does not say, but the main reason is likely to drive subscriptions. Free users who have come to rely on the tool may not want to lose access to it. The only option, if they want to continue using the add-ons, is to pay LanguageTool for the privilege.
LanguageTool users may use copy and paste for the checking of style, spelling, and grammar, but it is cumbersome in comparison.
LanguageTool alternatives
There are two groups that I would like to highlight.
- The first offers capabilities that are very similar to LanguageTool. These tools rely on server-side checks, like LanguageTool, which makes them convenient to use but not-so-great for privacy.
- The second group runs locally. This is much better for privacy, but features may be limited because of that or not as powerful.
Best privacy-friendly alternatives
Harper is a free locally-hosted open source grammar checker. That is great for privacy and it does come with browser and services integrations. Since it runs locally, its latency is much lower than that of cloud-based services.
However, the main downside is that Harper supports English only. The developers hinted in the past that other languages would be added in the future, but for now, English and some if its major dialects is all you get.
Self-hosted LanguageTool. It may come as a surprise, but you can actually host a LanguageTool server, if you have the technical know-how to get it up and running. This allows you to continue using the add-ons — I think — and you find starting instructions here. Could be an option for technical users who do not mind setting up their own server and fiddling around with configurations and such.
General alternatives
If you do not mind that your texts are transferred to cloud-based servers for checking, you may find the following tools or services useful.
QuillBot is an all-in-one writing assistant that offers a similar feature set. The free version checks spelling and grammar, comes with a few AI-based features, such as paraphrasing text (up to 125 words), browser extensions (no Firefox apparently), and some other applications and operating systems.
Windows users who use Edge may also check out the free Microsoft Editor of the browser. It offers limited grammar and spell-checking, but lacks deeper functionality.
Grammarly is another popular choice, but it has been criticized heavily in the past for its data collection practices.
Now You: do you use a grammar checker service or something else to make sure that mistakes are kept to a minimum? Feel free to post your suggestions and about your experience with these tools below.











