Antidote vs LanguageTool

Antidote

• People who write in both English and French
• Editors and translators who want explanations with each correction
• Families: one subscription covers five users
• Organizations that need a corrector installed without external servers

LanguageTool

• People who write in several languages, not only English
• LibreOffice, Thunderbird and Apple Pages users who want a checker add-on
• Developers who need a proofreading API or a checker they can host themselves

Antidote

• Druide's store lists prices in Canadian dollars, plus taxes where applicable.
• The subscription is billed once a year with no monthly option, and store purchases are not refundable.
• English and French are separate: one language is included, and having both costs CA$89.95 instead of CA$59.95.
• There is no native Android app. Android, Chromebook and Linux users work in Antidote Web, and Antidote Mobile has no corrector of its own.

LanguageTool

• The free Basic plan checks 2,000 characters per text field and allows 3 AI rephrasings a day.
• There is no free trial of Premium; LanguageTool offers a 14-day money-back guarantee instead.
• Monthly billing is $24.90, more than four times the per-month cost of the annual plan.
• Apps are listed for Windows, macOS and iOS; no Android app appears on the site.

Antidote

Corrector

Flags spelling, grammar and typography errors with a tooltip explaining each one, and its filters pick out repetition and non-inclusive wording.

Reformulation

A subscription-only mode that uses generative AI trained by Druide's linguists to rewrite, retouch, soften or shorten a passage or a segment of it.

Dictionaries

Definitions link on to synonyms, antonyms, word combinations, conjugations and word families, with audio pronunciation for subscribers.

Language guides

578 articles cover grammar, style, spelling and punctuation, and the corrector's tooltips link to the article that explains the rule in question.

Anti-Oops! for email

Steps in when Send is clicked to prompt a final check of the email, confirm that the intended attachments are included, and flag wording that may be badly received.

Connectors to other software

The free Connectix utility links Antidote 12 or Antidote Web to more than 90 applications, so corrections are applied in the original document.

LanguageTool

Grammar, spelling and style checks

Checks grammar, punctuation, spelling, casing and style. Premium adds more than 20,000 extra checks for English, German, French, Spanish, Dutch, Polish and Portuguese.

AI paraphrasing

Rephrases a sentence to be more formal, more fluid or shorter. Basic accounts get 3 rephrasings a day and Premium removes the limit.

Long-text checking

Premium checks up to 150,000 characters per text field, against 2,000 on the Basic plan.

Style guide and dictionaries

Custom rules enforce consistent wording. Teams share a style guide and a dictionary of approved terms, with admins deciding who can add to them.

Add-ons and apps

Browser add-ons for Chrome, Edge, Firefox, Safari and Opera, plugins for Google Docs, Word, Apple Pages and LibreOffice, email add-ons, and apps for Windows, macOS and iOS.

Open-source core and API

The core checker is open source, with code on GitHub, and users can set up their own LanguageTool server. A hosted Proofreading API accepts up to 60,000 characters per request.

Antidote

• Antidote+ Personal, one languageCA$59.95

  first year, in Canadian dollars; CA$48 per year on renewal

  One-year subscription for 1 user to all three applications, with the corrector, dictionaries and guides for English or French.

• Antidote+ Personal, English and FrenchCA$89.95

  first year, in Canadian dollars; CA$72 per year on renewal

  The Personal subscription with both languages, adding translations for 2.8 million words and expressions.

• Antidote+ Family, one languageCA$99.95

  first year, in Canadian dollars; CA$80 per year on renewal

  One-year subscription for up to 5 family members living under the same roof. Additional users do not need an email address.

• Antidote+ Family, English and FrenchCA$149.95

  first year, in Canadian dollars; CA$120 per year on renewal

  The Family subscription for 5 users with both languages and the 2.8 million translations.

• OrganizationsCustom

  From 5 devices or users by quote: Antidote 12 per-device licenses, Antidote Web subscriptions or Antidote Pro, priced by tiers.

LanguageTool

• Basic$0

  Grammar, punctuation and spelling checks on up to 2,000 characters per text field, with 3 AI sentence rephrasings a day.

• Premium$5.83

  per month, billed annually ($69.90); $24.90 billed monthly

  Up to 150,000 characters per text field, 20,000+ extra checks, unlimited AI paraphrasing and a personal style guide. Also $49.90 a quarter or $119.80 for 2 years.

• Teams$66.40

  per user / year, for a team of 2 users

  Every Premium feature plus user management, a team style guide and a team dictionary. Sold from 2 users, with a lower per-user price for larger teams.

Antidote

• Other savings

  Lower price on renewal

  Antidote+ costs less from the second year: Personal with one language is CA$59.95 for the first year and CA$48 on renewal, and Family CA$99.95 then CA$80.

• Education

  Preferential pricing and site licenses for schools

  Druide's organizations page says schools get preferential pricing and can buy a site license, with quotes available on request.

• Other savings

  Upgrade discount for owners of earlier editions

  People who already own an earlier edition of Antidote are offered a discounted switch to Antidote+ through the store's upgrade options.

LanguageTool

• Annual discount

  Longer billing terms cost less per month

  Premium is $24.90 billed monthly, $49.90 a quarter, $69.90 a year or $119.80 for two years, which works out to about $5.83 and $4.99 a month on the two longest terms.

• Education

  Up to 20% off for students and educators

  Students, teachers and professors can claim an educational discount of up to 20% off a Premium subscription.

• Other savings

  Team seats priced below individual plans

  On Teams, each seat costs less than the $69.90 individual annual price: $66.40 per user for 2 users and $62.91 per user from 10 users.

• Other savings

  Limited-time 20% discount on Premium

  The pricing page was advertising a limited-time 20% discount on Premium, with a countdown, when it was checked on 2026-10-05.