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It's a split decision.
Choose LanguageTool for multilingual checks and paraphrasing. Its lowest listed rate is $5.53 per user/month on annual Teams billing, but Teams requires two users; individual Premium is $5.83/month billed annually or $24.90 monthly. Grammarly Pro is €12/month, with no annual price published in the published pricing details. Both have free plans. Grammarly is the clearer fit if you want tone tools, full-sentence rewrites and stated support inside Zendesk and other text boxes.
01Side by side
| LanguageTool | Grammarly | |
|---|---|---|
| Starting price | From $5.53/user/month, annual Teams billing | €12/month for Pro; annual price not published |
| Free plan | 2,000 characters/text field; 3 AI rephrasings daily | Proofreading, tone view, 100 AI prompts monthly |
| Best for | Multilingual writing checks and sentence paraphrasing | Tone, clarity and rewrites across apps |
| Core strength | Grammar, spelling, punctuation and style across 30+ languages | Tone suggestions and full-sentence rewrites |
| Learning curve | Not published on the vendor's site | Not published on the vendor's site |
| Integrations/data | Integration details not published on the vendor's site | Works in Zendesk and other text boxes |
| Team/seat costs | 2-user minimum; $5.53/user/month, annual billing | Pro €12/member/month; Enterprise custom pricing |
| Support | Review support score: 5/10 | Review support score: 5/10 |
LanguageTool Choose LanguageTool if
- Choose LanguageTool if you write across 30+ languages and dialects.
- Choose LanguageTool if you want unlimited paraphrasing on paid plans.
- Choose LanguageTool if annual Teams billing fits your two-user minimum.
Grammarly Choose Grammarly if
- Choose Grammarly if you want tone suggestions and full-sentence rewrites.
- Choose Grammarly if you need writing help inside Zendesk and other text boxes.
- Choose Grammarly if its 2,000 monthly Pro prompts fit your workflow.
02Pricing compared
LanguageTool’s lowest listed rate is $5.53 per user/month, billed annually on Teams, but that plan requires at least two users. Individual Premium is $5.83/month billed annually or $24.90 month-to-month. Its free plan allows 2,000 characters per text field and three AI rephrasings per day. Premium and Teams have a 14-day money-back guarantee, not a free trial.
Grammarly Free includes 100 AI prompts per month. Pro costs €12/month; an annual price is not published on the vendor's site. Pro has a free trial, with an email reminder two days before it ends. These prices use different currencies, so they are not a direct like-for-like comparison. Both products offer free plans.
03Features and depth
LanguageTool is the stronger fit if language coverage and sentence paraphrasing matter. It checks grammar, spelling, punctuation, casing and style across more than 30 languages and dialects. Its style suggestions flag issues such as redundant words and overused phrases. Premium adds unlimited paraphrasing, with options to make a sentence more formal, fluent, simple or concise. The free plan allows three AI rephrasings per day.
Grammarly focuses on proofreading, tone and clarity, and is listed as working inside Zendesk and other text boxes. Pro adds full-sentence rewrites, tone adjustment, plagiarism and AI-text detection, plus 2,000 AI prompts per member per month. Free includes 100 prompts monthly. Grammarly also lists a humanizer agent; Enterprise adds controls such as SAML SSO and SCIM. The published details do not establish that either product is more accurate, so choose by language coverage and tools rather than an assumed accuracy edge.
04Ease of use and learning curve
Both offer free plans, so you can check whether their suggestions fit your writing before paying. Grammarly’s stated availability inside Zendesk and other text boxes may suit writers who want help where they already compose. The published details do not specify how much setup that requires.
LanguageTool covers more languages and offers writing statistics, including errors and suggestions applied. Its published review flags weaker value if you need the browser extension without paying. The review scores rate LanguageTool’s ease of use at 8/10 and Grammarly’s at 7/10, but those scores are not a controlled head-to-head usability measure. If you mainly need basic proofreading, start with either free plan; if you need advanced checks or AI features, compare the relevant caps before switching.
Questions people ask
What's better than Grammarly?
There is no clear winner for every writer. LanguageTool is a better match if you need checks across more than 30 languages and dialects or unlimited paraphrasing on Premium. Grammarly is a better match for tone suggestions, full-sentence rewrites and its stated support inside Zendesk and other text boxes.
Is Grammarly an AI grammar checker?
Yes. Grammarly describes itself as an AI-powered writing assistant that checks grammar and suggests tone, clarity and style fixes. Its Pro plan adds full-sentence rewrites and tone adjustment. The Free plan includes proofreading and 100 AI prompts per month, according to the published pricing details.
What's the disadvantage of using Grammarly?
The main drawback in the published details is the cost of advanced features: Pro is €12/month, and no annual price is listed. Free includes 100 AI prompts per month, while Pro includes 2,000 per member monthly. The published review also questions the value of Pro for casual writers.
What is the most reliable grammar checker?
The published information does not include comparative accuracy testing, so we cannot rank either tool as the most reliable. LanguageTool lists grammar checks in more than 30 languages and dialects; Grammarly lists grammar proofreading alongside tone and clarity suggestions. Try both free plans on your own writing before choosing.