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Grammarly vs Linguix

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors. Grammarly starts at $12, Linguix at $30. Both have a free tier. Only Linguix ships a public API.

GrammarlyGrammar, tone and rewriting help inside every appLinguixGrammar and style checking in the browser across seven languages

Side by side

FactGrammarlyLinguix
CategoryGrammar & ProofreadingGrammar & Proofreading
Pricing modelFreemiumFreemium
Starts at$12 month$30 month
Public APINoYes
PlatformsWeb, Chrome Ext, Windows, macOS, iOS, AndroidWeb, Chrome Ext, Android, API
CompanySuperhumanTextly Inc.
Launched20092018
Last verifiedSep 6, 2026Sep 6, 2026

What our research says

Grammarly

Still the default for catching mistakes inside other people's software, but the free tier has quietly become an AI-prompt meter and the honest price is $30 unless you commit to a full year.

Pros

  • Runs inside the apps people already write in rather than as a separate editor
  • Free tier still covers spelling, grammar and tone detection with no time limit
  • Pro folds in plagiarism and AI-text detection that rivals charge for separately

Cons

  • The $12 headline is the annual rate; paying monthly costs $30
  • Free AI allowance is 100 prompts a month and depletes quickly
  • No public API, so it cannot be embedded in another product
  • Enterprise pricing is not published anywhere on the site

Linguix

A cheaper Grammarly substitute whose two genuinely interesting features are not what it leads with: non-English checking and a grammar API you can embed in your own editor. As a pure English writing assistant it trails the market leaders.

Pros

  • multi-language checking that most English-first rivals do not match
  • documented API with a free 1M-character tier for evaluation
  • text-expansion shortcuts bundled instead of sold as a separate tool
  • two-year plan brings the effective price down to about $10/month

Cons

  • a permanent 50%-off banner makes the real list price hard to pin down
  • team and business pricing is not published anywhere on the site
  • very small company — headcount reported in the low single digits in 2026
  • English suggestion quality does not match Grammarly or LanguageTool Premium

Which one fits

Choose Grammarly if you need

  • Anyone writing in a browser, Word or email who wants corrections in place
  • Teams enforcing a house style guide across people who are not writers
  • Non-native English speakers who want fluency rewrites, not just error flags

Choose Linguix if you need

  • writers working in French, German, Spanish, Portuguese, Italian or Polish
  • developers embedding grammar checking into their own product via API
  • teams enforcing one style guide across support and sales writing
  • heavy users of canned replies and text snippets

More comparisons

All Linguix alternatives →Browse all Grammar & Proofreading →