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.

The short answer

Free plan: Both — GrammarBot is free to use, Grammarly has a free plan
Higher Trust score: Grammarly — 94 vs 72 for GrammarBot
Best fit: GrammarBot: iPhone users wanting free grammar and tone help outside the browser · Grammarly: Anyone writing in a browser, Word or email who wants corrections in place
Platforms: GrammarBot: iOS · Grammarly: Web, Chrome extension, Windows, macOS, iOS, Android
Status: Both up at our last check — GrammarBot Oct 15, 2026, Grammarly Oct 16, 2026

From our own records as of each tool's last check. Anything we have not confirmed is left out rather than guessed. How we verify

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

Fact	GrammarBot	Grammarly
Category	Grammar & Proofreading	Grammar & Proofreading
Pricing model	Free	Freemium
Starts at	—	$12/mo
Trust score	72 / 100	94 / 100
Platforms	iOS	Web, Chrome extension, Windows, macOS, iOS, Android
Company	Yevhenii Filatov	Superhuman
Launched	—	2009
Last verified	Oct 15, 2026	Oct 16, 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
No update since version 1.0.5 in November 2023, and only a handful of App Store ratings

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