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Antidote alternatives: 4 apps ranked by verified data

Facts checked Oct 25, 2026AppBreakup editorialHow we rank

Common reasons people leave Antidote: no free plan, and interface is dense compared with browser checkers. We ranked 4 alternatives by how directly each one replaces Antidote, then by reviews, real visits and how recently each app's facts were checked against its own website. LanguageTool currently ranks first.

Quick comparison

#AppPricingOpen sourcePlatformsVerified factsScore
1Harper logoHarperOpen sourceYesmacOS, Windows, Linux +15 of 557.2
  1. Harper logo

    1. HarperTop pick

    Best for: Privacy-minded writers and developers who want grammar checks without the cloud

    Open sourcemacOS, Windows, Linux, Browser extension

    57.2

    score / 100

    Why switch from Antidote

    Free, local and open source for English, if you don't need French.

    Pros

    • Runs fully offline, with no account or data upload
    • Works in browsers, Obsidian, WordPress and code editors
    • Free and open source under Apache 2.0

    Cons

    • English only
    • No AI rewriting or tone suggestions
    • Catches fewer issues than commercial checkers
    Visit Harper Details and reviews
    How this score is calculated
    Editorial fit ×0.369
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.1585
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Harper a good Antidote alternative?

    Verified facts

    5 of 5 verified
    License
    Apache-2.0
    Checked Oct 25, 2026writewithharper.com(opens source in a new tab)
    Offline
    Yes, privacy-first
    Checked Oct 25, 2026writewithharper.com(opens source in a new tab)
    Price
    Free
    Checked Oct 25, 2026writewithharper.com(opens source in a new tab)
    Integrations
    Language server, JS library, Rust crate, extensions
    Checked Oct 25, 2026writewithharper.com(opens source in a new tab)
    Install
    Homebrew, Scoop and others
    Checked Oct 25, 2026writewithharper.com(opens source in a new tab)

The best Antidote alternative for…

The highest-ranked app in this list for each need.

LanguageTool logo

Best Antidote alternative for most people

LanguageTool

Covers French, English and many more languages, with a free tier.

Harper logo

Best Antidote alternative for a free option

Harper

Free, local and open source for English, if you don't need French.

Grammarly logo

Best Antidote alternative for a free plan you can upgrade

Grammarly

Faster, more automated English corrections if you rarely write in French.

LanguageTool logo

Best Antidote alternative for open source

LanguageTool

Covers French, English and many more languages, with a free tier.

LanguageTool logo

Best Antidote alternative for self-hosting

LanguageTool

Covers French, English and many more languages, with a free tier.

ProWritingAid logo

Best Antidote alternative for Mac

ProWritingAid

Deeper English style analysis for long-form writing.

LanguageTool logo

Best Antidote alternative for Windows

LanguageTool

Covers French, English and many more languages, with a free tier.

Harper logo

Best Antidote alternative for Linux

Harper

Free, local and open source for English, if you don't need French.

Grammarly logo

Best Antidote alternative for iPhone and Android

Grammarly

Faster, more automated English corrections if you rarely write in French.

LanguageTool logo

Best Antidote alternative for working in the browser

LanguageTool

Covers French, English and many more languages, with a free tier.

Antidote alternatives: common questions

What is the best alternative to Antidote?

LanguageTool ranks first right now. Covers French, English and many more languages, with a free tier. Grammarly and ProWritingAid follow it in our ranking.

Is there a free alternative to Antidote?

Yes. LanguageTool (free plan + paid), Grammarly (free plan + paid), ProWritingAid (free plan + paid) and Harper (open source) have a free option. Check each app's verified facts for current plan limits.

Is there an open-source alternative to Antidote?

Yes: LanguageTool and Harper. LanguageTool can also be self-hosted.

Which Antidote alternatives work on Linux?

Harper runs on Linux.

Why do people switch from Antidote?

The complaints we hear most: no free plan; interface is dense compared with browser checkers; only English and French.

How is this list ranked?

Every app is scored with the same published formula: how directly it replaces Antidote, reviews (weighted by verification), visits from AppBreakup, how recently its facts were checked against its own website, and reader votes.