LanguageTool vs ProWritingAid
Price, platforms and features side by side. The table says where each price was read and when.
LanguageTool
Grammar and style checker for more than 30 languages
ProWritingAid
Grammar, style and story-critique toolkit for book writers
Where they differ
- LanguageTool starts at $4.99 per month on a 2-year plan ($119.80); $69.90 billed annually. ProWritingAid starts at $10 per month, billed yearly ($120).
- Only LanguageTool lists an iOS app.
- LanguageTool is open source and self-hostable, according to its own site.
- ProWritingAid also covers long-form writing.
At a glance
| LanguageTool | ProWritingAid | |
|---|---|---|
| Pricing | Free plan | Free plan |
| Starts at | $4.99 per month on a 2-year plan ($119.80); $69.90 billed annually | $10 per month, billed yearly ($120) |
| Free plan | Basic plan: grammar, punctuation and spelling checks in 30+ languages on up to 2,000 characters per text field, with limited Picky Mode and 3 AI rephrasings a day. | Grammar, spelling and punctuation checks on up to 500 words at a time, 2 runs of each line-editing report, 10 Rephrases, 3 Sparks and 3 Creative Nudges a day. |
| Free trial | None listed | None listed |
| Web | ||
| macOS | ||
| Windows | ||
| iOS | ||
| Browser extension | ||
| Made by | LanguageTooler GmbH | Orpheus Technology |
| Price read from | languagetool.org | prowritingaid.com |
| Checked | Oct 5, 2026 | Oct 9, 2026 |
Who each one suits
LanguageTool
- People who write in several languages, not only English
- LibreOffice, Thunderbird and Apple Pages users who want a checker add-on
- Developers who need a proofreading API or a checker they can host themselves
ProWritingAid
- Fiction writers who want feedback on a chapter or a whole manuscript
- Authors who edit in Scrivener, Word or Google Docs
- Writers who would rather buy a lifetime license than subscribe
Worth knowing
LanguageTool
- The free Basic plan checks 2,000 characters per text field and allows 3 AI rephrasings a day.
- There is no free trial of Premium; LanguageTool offers a 14-day money-back guarantee instead.
- Monthly billing is $24.90, more than four times the per-month cost of the annual plan.
- Apps are listed for Windows, macOS and iOS; no Android app appears on the site.
ProWritingAid
- The Free plan checks at most 500 words at a time and allows 2 runs of each report per day.
- Manuscript Analysis, Virtual Beta Reader and the other full-story tools need Story Credits, bought separately from a subscription.
- An internet connection is required for the Web Editor and every integration, including the desktop apps.
- Plagiarism checks are sold separately in bundles, and each check covers up to 2,000 words.
Key features
LanguageTool
- Grammar, spelling and style checks
- Checks grammar, punctuation, spelling, casing and style. Premium adds more than 20,000 extra checks for English, German, French, Spanish, Dutch, Polish and Portuguese.
- AI paraphrasing
- Rephrases a sentence to be more formal, more fluid or shorter. Basic accounts get 3 rephrasings a day and Premium removes the limit.
- Long-text checking
- Premium checks up to 150,000 characters per text field, against 2,000 on the Basic plan.
- Style guide and dictionaries
- Custom rules enforce consistent wording. Teams share a style guide and a dictionary of approved terms, with admins deciding who can add to them.
- Add-ons and apps
- Browser add-ons for Chrome, Edge, Firefox, Safari and Opera, plugins for Google Docs, Word, Apple Pages and LibreOffice, email add-ons, and apps for Windows, macOS and iOS.
- Open-source core and API
- The core checker is open source, with code on GitHub, and users can set up their own LanguageTool server. A hosted Proofreading API accepts up to 60,000 characters per request.
ProWritingAid
- Grammar Checker and Writing Reports
- Fixes grammar, spelling, punctuation and consistency issues, and more than 25 reports analyze readability, sentence structure, sticky sentences and word choice.
- Rephrase and Sparks
- Rephrase offers alternative phrasings for a sentence, and Sparks suggests rewrites in different styles. Free accounts get 10 Rephrases and 3 Sparks a day.
- Chapter Critique
- Feedback on the pacing, dialogue and prose of a single chapter. Premium includes 1 critique a day and Premium Pro 30 a day.
- Full-manuscript analysis
- Manuscript Analysis, Plot Analysis, Character Analysis, Virtual Beta Reader and Marketability Analysis each cost 1 Story Credit per run on stories up to 300,000 words.
- Planning and writing tools
- Story Canvas gives guided prompts on characters, plot, setting and structure before drafting, and Writing Sessions provide a distraction-free writing space.
- Works inside other writing apps
- Desktop Everywhere for Windows and Mac covers Word, Scrivener and other desktop apps, and Chrome, Edge and Firefox extensions cover Google Docs, Atticus and web pages.
Plans
LanguageTool
Basic$0
Grammar, punctuation and spelling checks on up to 2,000 characters per text field, with 3 AI sentence rephrasings a day.
Premium$5.83
per month, billed annually ($69.90); $24.90 billed monthly
Up to 150,000 characters per text field, 20,000+ extra checks, unlimited AI paraphrasing and a personal style guide. Also $49.90 a quarter or $119.80 for 2 years.
Teams$66.40
per user / year, for a team of 2 users
Every Premium feature plus user management, a team style guide and a team dictionary. Sold from 2 users, with a lower per-user price for larger teams.
ProWritingAid
Free$0
Grammar, spelling and punctuation checks on up to 500 words, with 10 Rephrases, 3 Sparks and 2 runs of each report per day.
Premium$10
per month, billed yearly ($120); $30 billed monthly
Unlimited word count, report runs and Rephrases, 25+ writing reports, a custom style guide, 1 Chapter Critique and 5 Sparks a day.
Premium Pro$12
per month, billed yearly ($144); $36 billed monthly
Everything in Premium, plus 30 Chapter Critiques and 50 Sparks a day, live workshops, daily cowriting sprints and a 200+ workshop library.
Premium (Lifetime)$399
one-time payment
The Premium feature set for a single payment instead of a subscription.
Premium Pro (Lifetime)$699
one-time payment
The Premium Pro feature set for a single payment instead of a subscription.
Ways to pay less
LanguageTool
- Annual discount
Longer billing terms cost less per month
Premium is $24.90 billed monthly, $49.90 a quarter, $69.90 a year or $119.80 for two years, which works out to about $5.83 and $4.99 a month on the two longest terms.
- Education
Up to 20% off for students and educators
Students, teachers and professors can claim an educational discount of up to 20% off a Premium subscription.
- Other savings
Team seats priced below individual plans
On Teams, each seat costs less than the $69.90 individual annual price: $66.40 per user for 2 users and $62.91 per user from 10 users.
- Other savings
Limited-time 20% discount on Premium
The pricing page was advertising a limited-time 20% discount on Premium, with a countdown, when it was checked on 2026-10-05.
ProWritingAid
- Annual discount
Save 67% with yearly billing
Premium is $10 a month billed yearly ($120) against $30 billed monthly, and Premium Pro is $12 a month ($144) against $36. The pricing page states a 67% saving.
- Lifetime license
Lifetime licenses from $399
A one-time payment of $399 buys Premium and $699 buys Premium Pro, each with a 3-day money-back guarantee.
- Education
20% student discount on annual plans
Students get 20% off annual subscriptions by verifying through the Student App Centre with an academic email address or other evidence of student status.
- Education
Free ProWritingAid for Education license
Primary and secondary school teachers can apply for a free ProWritingAid for Education license for themselves and their students.
- By country
Lower price shown to buyers in India
ProWritingAid says prices depend on the visitor's country and shows rupees in India. On 9 October 2026 Premium there was ₹550 a month billed yearly (₹6,600), against $10 a month ($120) in a US copy archived on 5 October.
