Grammarly vs LanguageTool

Grammarly (AI writing partner for grammar, clarity, tone and rewrites.) and LanguageTool (AI-based multilingual grammar, style and paraphrasing checker (30+ languages, vendor-stated).) compared side by side: plans and prices, vendor-stated features, platforms and sign-in, with the date each fact was checked. Matches based on official product information.

Based on official vendor pages, linked below
Grammarly pricing checked: 2026-10-27
LanguageTool pricing checked: 2026-10-27

At a glance

Grammarly

Grammarly, Inc.

AI writing tools

What it does: AI writing partner for grammar, clarity, tone and rewrites.
Strong at: Strong fit for ongoing writing correction with a monthly AI-generation prompt allowance.
Free plan: Yes - ongoing free plan
Paid plans from: US$12 / month

Pricing checked 2026-10-27 · Full Grammarly record · Official site

LanguageTool

AI writing tools

What it does: AI-based multilingual grammar, style and paraphrasing checker (30+ languages, vendor-stated).
Strong at: Strong fit for multilingual grammar checking with a few free AI rephrases per day.
Free plan: Yes - mixed free access
Paid plans from: US$24.9 / month

Pricing checked 2026-10-27 · Full LanguageTool record · Official site

Plans & pricing

Grammarly plans & pricing

Checked 2026-10-27. · Vendor pricing page Confirm prices and terms with the vendor before buying.

Free

$0 / month

Pro

$12 USD

Enterprise

demo/custom

LanguageTool plans & pricing

Checked 2026-10-27. · Vendor pricing page Confirm prices and terms with the vendor before buying.

Premium

$24.90/mo monthly-billed (per languagetool.org/premium, 2026-10-27)

Side-by-side facts

	Grammarly	LanguageTool
Free plan	Yes - ongoing free plan	Yes - mixed free access
Paid plans from	US$12 / month	US$24.9 / month
Platforms	Web editor; Windows and Mac apps; iOS and Android; browser extensions.	Not stated
Sign-in	Some public writing checks can be tried first. Sign in for the Grammarly Editor and account features.	Optional for basic web checking. Account adds dictionary, statistics and saved texts.
API	Yes. REST APIs cover writing evaluation, detection, analytics and administration; not every app feature is an API.	Yes. HTTP proofreading API with free limits and paid developer access.

What each tool says it does

Grammarly - vendor-stated features

Proofreading
Rewrites
Tone

Worth knowing before you choose

Grammarly - worth knowing

The Free plan includes 100 AI prompts/month. “Try Pro for $0” is a separate trial.

LanguageTool - worth knowing

Identity from owning pages: languagetool.org says "LanguageTool is an AI-based grammar checker"; /about describes AI-based style/tonality analysis and an AI paraphraser.
A writing checker, not a translator - filed under writing.
Core has been open source since 2003 (vendor-stated).
free non-AI checking standing, plus 3 AI rephrases per day - a renewable daily AI allowance (mixed).
'Sentence rephrasing by A.I.
3 per day' on the Basic column; free non-AI checking capped at 2,000 characters per text field; Basic usable without a user account per FAQ.
Daily renewable AI subscope - mixed.

Common questions

Is Grammarly or LanguageTool free to use?

Grammarly: Yes - ongoing free plan (checked 2026-10-27). LanguageTool: Yes - mixed free access (checked 2026-10-27).

What do Grammarly and LanguageTool cost?

Grammarly's entry paid plan is US$12 / month and LanguageTool's is US$24.9 / month, from each vendor's pricing page (2026-10-27 and 2026-10-27 respectively). The tables above list every plan each vendor published.

Which is better, Grammarly or LanguageTool?

It depends on the job. Grammarly: Strong fit for ongoing writing correction with a monthly AI-generation prompt allowance. LanguageTool: Strong fit for multilingual grammar checking with a few free AI rephrases per day. The feature and pricing tables above show where they differ.

Where do these facts come from?

Every fact on this page is read from the vendors' own product and pricing pages, with the checked date shown beside it. Links to both official pages are at the top of each column.

Keep comparing

This comparison is not a recommendation: it sets out what each vendor states on its own pages, with the dates those pages were checked. Prices and features change - confirm with the vendor before buying.