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Free alternatives to Grammarly

Top pick: LanguageTool. Switching saves about $144 USD a year.

Grammarly, Grammarly Pro, annual plan

$144 USDa year

≈$205.30 CAD (converted from USD)

Every pick below has a free version.

Runs on
  • Windows
  • macOS
  • Web
  • iOS
  • Android
Key file formats
Not listed

Filter alternatives

2 alternatives

Top pick

1 tool

The editor’s first choice for most people switching.

  1. Rank 1: LanguageTool

    Best for multilingual checking in browsers and Office

    License: Open source
    • Windows
    • macOS
    • Linux
    • Web
    • iOS
    • Self-hosted
    Status: Unknown

    LGPL core with a free hosted service. The free plan checks up to 2,000 characters per text field; Premium raises that to 150,000. Free version: The free hosted plan checks up to 2,000 characters per field with 3 AI paraphrases a day. Premium raises both.

Strong

1 tool

Covers most of the same work, with trade-offs noted on each card.

  1. Rank 2: Harper

    Best for private offline English checking

    License: Open source
    • Windows
    • macOS
    • Linux
    • Web
    • Command line
    Status: Unknown

    Apache-2.0. The site says every check runs locally, with no cloud processing, telemetry or LLM. English only, in several dialects.

Sponsor this page: $149 for 30 days. Sponsors appear above the ranking, labeled; the ranking itself is not for sale.

Feature parity

How each alternative covers what people use Grammarly for. Numbers link to editor notes.

Feature parity with Grammarly
FeatureLanguageToolHarper
Proofreading
Grammar and spelling checksYesNote 1PartialNote 2
Style
Tone and clarity suggestionsPartialNote 3NoNote 4
AI
AI rewriting and text generationPartialNote 5NoNote 6
Integrity
Plagiarism and AI-text detectionNoNote 7NoNote 8
Platforms
Works in browsers and desktop appsYesNote 9PartialNote 10
Parity score60%20%
  1. LanguageTool, Grammar and spelling checks: Checks 25+ languages
  2. Harper, Grammar and spelling checks: English only; rule-based checks
  3. LanguageTool, Tone and clarity suggestions: Many style checks are Premium only
  4. Harper, Tone and clarity suggestions: No tone detection
  5. LanguageTool, AI rewriting and text generation: Free plan allows 3 AI paraphrases a day
  6. Harper, AI rewriting and text generation: No AI model; checks run on your device
  7. LanguageTool, Plagiarism and AI-text detection: No plagiarism checker
  8. Harper, Plagiarism and AI-text detection: No plagiarism checker
  9. LanguageTool, Works in browsers and desktop apps: Browser add-ons, Google Docs, Word, LibreOffice and email apps
  10. Harper, Works in browsers and desktop apps: Browser extensions, editor plugins and a macOS desktop app

Not covered by any free alternative yet: Tone and clarity suggestions, AI rewriting and text generation, Plagiarism and AI-text detection. See all feature gaps

What switching saves

Switching saves about $144 USD / ≈$205 CAD (estimated from the USD price) a year. Prices checked ; ≈ means converted from USD.

Based on Grammarly Pro, annual plan. Price source. USD to CAD at 1.4257 as of Oct 7, 2026.

About this page

Last verified . Ranking: tier first, then the published score.

Something wrong or out of date? Report outdated info.

Related

Grammarly is a product of Superhuman, named here for comparison only. Platforms listed for Grammarly: Windows, macOS, Web, iOS, Android.