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Grammarly vs Write Tone

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, Write Tone at $15.82. Both have a free tier. Only Write Tone ships a public API.

GrammarlyGrammar, tone and rewriting help inside every appWrite ToneParaphraser, grammar checker and AI-text humaniser bundled with about 30 small writing tools.

Side by side

FactGrammarlyWrite Tone
CategoryGrammar & ProofreadingAI Writing Assistants
Pricing modelFreemiumFreemium
Starts at$12 month$15.82 month
Public APINoYes
PlatformsWeb, Chrome Ext, Windows, macOS, iOS, AndroidWeb, Chrome Ext, API
CompanySuperhumanIbranext Technologies
Launched20092023
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

Write Tone

Good value if you actually use several of the tools - unlimited paraphrasing, grammar checking and summarising for about $16 a month undercuts buying them separately. The honesty problem is that the same subscription sells plagiarism detection and a detector-evasion rewriter side by side, which tells you who the real customer is. Treat the 637,000-user claim as marketing.

Pros

  • Around 90 tone presets on the paraphraser, across 50+ languages
  • Grammar checking, summarising and plagiarism checking included in the same plan
  • Chrome extension and Microsoft Word integration, not web-only
  • Documented API endpoint for programmatic access
  • Free tier is a real 100,000 characters a month rather than a trial

Cons

  • Sells detector-evasion and plagiarism detection in the same subscription
  • No company country or registered address published
  • Free tier carries ads and throttles the humaniser and summariser
  • Tool count is inflated by many near-identical single-purpose pages

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 Write Tone if you need

  • Students and writers who want paraphrasing plus grammar checking in one subscription
  • Non-native writers adjusting tone across many languages
  • People who want a Chrome extension rather than another browser tab

More comparisons

All Write Tone alternatives →Browse all Grammar & Proofreading →