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Grammarly vs Plagiarismremover

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, Plagiarismremover at $6.50. Both have a free tier.

GrammarlyGrammar, tone and rewriting help inside every appPlagiarismremoverRewrites flagged text to remove plagiarism while keeping the original meaning, in four different modes.

Side by side

FactGrammarlyPlagiarismremover
CategoryGrammar & ProofreadingParaphrasing & Rewriting
Pricing modelFreemiumFreemium
Starts at$12 month$6.50 week
Public APINoNo
PlatformsWeb, Chrome Ext, Windows, macOS, iOS, AndroidWeb
CompanySuperhuman—
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

Plagiarismremover

Does what it says — rewrites flagged text into something that reads differently while keeping the meaning — and the $6.50-a-week Pro tier is cheap enough for occasional use. It's a rewriting tool, not a plagiarism checker, so it won't tell you what's actually flagged before you fix it.

Pros

  • four distinct rewrite modes instead of one generic pass
  • supports 15+ languages
  • exports to plain text or Word
  • free tier is enough to test quality before paying

Cons

  • free tier caps input at 1,000 words
  • doesn't detect or flag plagiarism itself, only rewrites what you already flagged
  • no company name is published anywhere on the site

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 Plagiarismremover if you need

  • students or writers who already know which passage was flagged and need it rewritten
  • quick rewrites in a non-native language among the 15+ supported

More comparisons

Browse all Grammar & Proofreading →