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Grammarly vs RewriteBar

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, RewriteBar at $29. Only Grammarly has a free tier.

GrammarlyGrammar, tone and rewriting help inside every appRewriteBarA macOS menu-bar shortcut that rewrites, translates, or fixes grammar in whatever text field is focused.

Side by side

FactGrammarlyRewriteBar
CategoryGrammar & ProofreadingAI Writing Assistants
Pricing modelFreemiumPaid
Starts at$12 month$29 one_time
Public APINoNo
PlatformsWeb, Chrome Ext, Windows, macOS, iOS, AndroidmacOS
CompanySuperhumanMathias Michel
Launched20092024
Last verifiedSep 6, 2026Sep 1, 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

RewriteBar

RewriteBar is a good fit for a macOS user who wants AI rewriting available by keyboard shortcut in any app rather than pasting text into a browser tab, and the one-time price is a genuine alternative to a subscription. The catch is it's Mac-only with no Windows or iOS version, and it's a single developer's product rather than a team with a support desk.

Pros

  • Works inside most macOS text fields via a keyboard shortcut
  • One-time purchase instead of a subscription
  • Free trial credits with no card required
  • Built-in custom rewrite workflows beyond tone and grammar presets

Cons

  • macOS only, no Windows or iOS version
  • Built and maintained by a single developer

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 RewriteBar if you need

  • macOS users who want rewriting available system-wide by shortcut
  • Anyone who prefers a one-time purchase over another monthly subscription

More comparisons

Browse all Grammar & Proofreading →