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GrammarBot 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); GrammarBot does not. Both have a free tier.

GrammarBotFree iOS app for grammar checks, message rewrites, tone changes, and translation across several languages.GrammarlyGrammar, tone and rewriting help inside every app

Side by side

FactGrammarBotGrammarly
CategoryGrammar & ProofreadingGrammar & Proofreading
Pricing modelFreeFreemium
Starts at—$12 month
Public APINoNo
PlatformsiOSWeb, Chrome Ext, Windows, macOS, iOS, Android
CompanyYevhenii FilatovSuperhuman
Launched—2009
Last verifiedSep 1, 2026Sep 6, 2026

What our research says

GrammarBot

A free, narrowly scoped iOS grammar and rewrite app rather than a browser tool, useful mainly for someone who wants grammar help built into their phone keyboard workflow. Being a free solo-developer app rather than a funded product is worth weighing against needing consistent long-term support.

Pros

  • Free to download with no visible in-app purchase pricing
  • Covers rewriting and tone shifting, not just spelling and grammar
  • Supports translation across six other languages in the same app

Cons

  • iOS only, no Android, web, or desktop version
  • Built and maintained by a solo developer rather than a company, per the App Store listing
  • Easy to confuse with the unrelated GrammarBot.io API product of the same name

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 GrammarBot if you need

  • iPhone users wanting free grammar and tone help outside the browser
  • Multilingual users needing translation alongside grammar checks

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

Browse all Grammar & Proofreading →