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Grammarly vs Manzoni

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, Manzoni at $59. Both have a free tier.

GrammarlyGrammar, tone and rewriting help inside every appManzoniMac writing helper that summarizes, rewrites, and translates text locally across 10+ apps, without a subscription.

Side by side

FactGrammarlyManzoni
CategoryGrammar & ProofreadingAI Writing Assistants
Pricing modelFreemiumFreemium
Starts at$12 month$59 one_time
Public APINoNo
PlatformsWeb, Chrome Ext, Windows, macOS, iOS, AndroidmacOS
CompanySuperhumanGems Platforms, Inc.
Launched2009—
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

Manzoni

Manzoni's pitch is processing everything locally on the Mac instead of sending text to a cloud model, paired with a one-time $59 price instead of yet another writing subscription. The tradeoff is that it only works inside its list of supported apps and only on macOS, so it is not an option for Windows users or apps outside that list.

Pros

  • All processing happens on-device rather than through a cloud service
  • One-time $59 payment instead of a recurring subscription
  • Works inside 10+ existing apps via hotkey rather than requiring a separate editor
  • No account or signup required to use it

Cons

  • macOS only, with no Windows, Linux, or mobile version
  • Free tier is capped at just 3 documents and 10 daily requests, which is thin for real evaluation

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 Manzoni if you need

  • Mac users who write across many apps and want one consistent assistant
  • Anyone who would rather pay once than subscribe monthly for writing help
  • Users concerned about sending drafts to a cloud AI service

More comparisons

All Manzoni alternatives →Browse all Grammar & Proofreading →