Skip to content
effecthub

Caret vs Grammarly

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 publishes a starting price ($12); Caret does not. Both have a free tier.

CaretMac-wide autocomplete: press Tab in any app and it finishes the sentence from what it has seen on your screenGrammarlyGrammar, tone and rewriting help inside every app

Side by side

FactCaretGrammarly
CategoryDesktop & OS AssistantsGrammar & Proofreading
Pricing modelFreeFreemium
Starts at—$12 month
Public APINoNo
PlatformsmacOSWeb, Chrome Ext, Windows, macOS, iOS, Android
CompanyCaret Ops, Inc.Superhuman
Launched20262009
Last verifiedSep 6, 2026Sep 6, 2026

What our research says

Caret

Caret's idea is that the AI should come to where you type rather than making you visit a chat window, and one keystroke in any Mac app is about as low-friction as that gets. Storing memory locally is the right default for something this invasive. But the mechanism is continuous screen reading, it demands macOS 26 or newer, and free at launch from a v1 startup is a price that has nowhere to go but up.

Pros

  • Works across dozens of apps rather than inside one editor
  • Single Tab keystroke — no palette, no window switch
  • Memory is stored locally on the Mac and improves with use
  • Free at launch with no card required

Cons

  • macOS 26 or newer only, which excludes most machines today
  • Requires continuous screen-reading permission to function at all
  • Free at launch is not a committed price for a v1 product
  • No API, no team features, no cross-device sync mentioned

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

Which one fits

Choose Caret if you need

  • Heavy Mac writers working across Mail, Slack and documents all day
  • People who dislike switching to a chat window to get a sentence finished
  • Anyone on macOS 26 who wants completion inside Xcode and VS Code too

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

More comparisons

All Caret alternatives →Browse all Desktop & OS Assistants →