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Grammarly vs Lunchbreak AI

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, Lunchbreak AI at $10. Both have a free tier.

GrammarlyGrammar, tone and rewriting help inside every appLunchbreak AIChecks essays against Turnitin, GPTZero and other detectors, then rewrites flagged passages to read as human-written.

Side by side

FactGrammarlyLunchbreak AI
CategoryGrammar & ProofreadingAI Detection & Humanizers
Pricing modelFreemiumFreemium
Starts at$12 month$10 month
Public APINoNo
PlatformsWeb, Chrome Ext, Windows, macOS, iOS, AndroidWeb
CompanySuperhumanLunchbreak AI
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

Lunchbreak AI

Lunchbreak AI is built specifically around beating named AI detectors rather than generic paraphrasing, which is a narrower and more testable claim than most humanizer tools make. The obvious catch is that using it to submit AI-assisted work as your own can violate academic integrity policies regardless of whether it fools a detector.

Pros

  • Tests against six named detectors, not just one
  • Rewrites flagged passages instead of the whole document
  • Free plan lets you try it on a real essay before paying

Cons

  • No company name or location disclosed
  • Detector-beating claims can't be independently verified and detectors change over time

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 Lunchbreak AI if you need

  • Writers who draft with AI and need a natural-sounding final pass
  • Non-native English speakers smoothing AI-assisted drafts

More comparisons

All Lunchbreak AI alternatives →Browse all Grammar & Proofreading →