Grammarly vs LanguageTool

Vendor decision canvas

Vendor 1

GrammarlyAI Writing Assistants

AI writing assistant providing grammar, clarity, tone, and style suggestions across documents, emails, and apps.

$12+ / seat / monthPriceNo reviewsRating2009Founded

Vendor 2

LanguageToolAI Writing Assistants

Open-source grammar, style, and spell checker supporting 30+ languages with AI-powered suggestions.

$5+ / monthPriceNo reviewsRating2003Founded

Carry this decision forward

Grammarly + LanguageTool can move into a shared evaluation.

2-vendor view

Vendor evidence comparison for Grammarly, LanguageTool
	Vendor 1 Grammarly AI Writing Assistants Grammarly makes AI writing convenient. View profile Visit	Vendor 2 LanguageTool AI Writing Assistants More than a Grammar Checker View profile Visit
Overview
Category	AI Writing Assistants	AI Writing Assistants
What it is	AI writing assistant providing grammar, clarity, tone, and style suggestions across documents, emails, and apps.	Open-source grammar, style, and spell checker supporting 30+ languages with AI-powered suggestions.
Pricing
Price	$12+ / seat / month	$5+ / month
Pricing model	Tiered plans	Tiered plans
Free options	Free plan, Free trial	Free plan, Free trial
Company
Founded	2009	2003
Team size	1001-5000 employees	11-50 employees
Headquarters	San Francisco, CA	Potsdam, Germany

Typical monthly range: $10–$30 per seat. 32% are priced on request.