LanguageTool vs ProWritingAid
LanguageTool scores 5.2 to ProWritingAid's 3.9 among the AI writing assistants we rate, and is the better pick for 1 of the 4 kinds of buyer below.
LanguageTool wins, 5.2 to 3.9
LanguageTool's Premium plan is $25.48 a month, cheaper than ProWritingAid Premium's $30. LanguageTool includes a team plan with a shared style guide, an API and a personal dictionary; ProWritingAid's pricing page lists none of those four. ProWritingAid checks for plagiarism through separate credits, which LanguageTool does not offer at all. Both tools say they do not train their AI on your writing.
Pick LanguageTool if you want a team plan, API and lower monthly price.
Pick ProWritingAid if you want plagiarism checking and don't need an API.
Best for
Who each one suits, decided on the criteria that matter to that buyer and the checked facts where the two differ.
- Writes in a saved voice or style: LanguageTool yes, ProWritingAid no
- Word, Google Docs, Outlook, Gmail and Slack add-ins: Word, google_docs, outlook, gmail against Word, google_docs
- Checks for plagiarism: ProWritingAid yes, LanguageTool no
- Monthly price, cheapest paid plan: LanguageTool $25.48, ProWritingAid $30
- Your own style guide and terms: LanguageTool yes, ProWritingAid no
- Team plan with shared settings: LanguageTool yes, ProWritingAid no
- API: LanguageTool yes, ProWritingAid no
How they score
Both are scored the same way, against the other AI writing assistants we rate, from facts on each vendor's own pages. LanguageTool leads on 2 of 5 criteria.
Where they differ
Every point where the two vendors' published facts disagree, with a link to where each fact was read. "Not published" means the vendor does not say either way.
Published by only one of them
Where they match (12)
Pricing, plan by plan
Every plan each vendor publishes, monthly and yearly where both are offered.
LanguageTool
ProWritingAid
Pros and cons
From each tool's full review, written from the same checked facts.
LanguageTool
- Supports grammar, style, and spelling checking across 30+ languages including multiple dialects, making it genuinely useful for multilingual users.
- Has been operational since 2003, predating most competitors including Grammarly, indicating long-term stability and refinement.
- Integrates across a wide range of surfaces including Chrome, Firefox, Edge, Safari, macOS, Windows, Google Docs, Microsoft Word, LibreOffice, Gmail, Outlook, Apple Mail, and Thunderbird.
- Picky Mode offers an adjustable level of style critique, letting writers choose how aggressively the tool pushes back on their writing.
- The AI paraphraser has five rewriting modes (general, formal, concise, fluent and simple) for sentence-level refinement.
- Personal dictionary feature allows technical writers and specialists to add field-specific terms, reducing false positives.
- Style Guide feature at Premium and Teams levels enables organizations to enforce custom writing rules consistently.
- The tool is narrower in scope than competitors like Grammarly, which may disappoint users expecting a full-featured writing assistant.
- AI functionality is limited to sentence-level paraphrasing and is not a content generation platform, which will confuse users expecting Jasper-like capabilities.
- Advanced features like the Style Guide are locked behind Premium and Teams pricing tiers, limiting value for free users.
- Depth of checking may not match the breadth of language support, meaning multilingual users could find suggestions inconsistent across languages.
- Users with specialized vocabularies face friction until they manually build out their personal dictionary to avoid repeated false corrections.
ProWritingAid
- Offers 25+ writing reports including pacing analysis, dialogue tag tracking, and repeated phrase detection that go far beyond surface-level grammar checks.
- Integrates with Scrivener, a major differentiator over Grammarly that fiction writers in long-form workflows genuinely value.
- Works across multiple environments including a web editor, desktop app, Chrome extension, Microsoft Word, and Google Docs.
- The Chapter Critique feature provides AI-driven feedback on entire chapters at once, approximating developmental editing rather than simple grammar correction.
- The Virtual Beta Reader simulates reader response feedback on manuscripts, offering fiction writers access to a resource they may not otherwise have.
- Sparks feature helps writers push through creative blocks by offering AI-powered inspiration and continuation mid-chapter.
- In development since 2012, giving it a long track record in writing software.
- Manuscript-level depth of analysis is available at a comparable price point to competitors that offer far less specialized feedback.
- Runs on a proprietary AI model with no recognizable third-party AI partnership, which may raise questions about model quality and transparency.
- The tool is heavily specialized for long-form fiction writers, making it potentially overkill or poorly suited for casual or business writers.
- The large number of reports (25+) can feel overwhelming and may require significant time investment to use effectively.
- Does not offer GPT-4 or similarly branded AI integrations that some competing tools use to establish credibility.
- Users coming from Grammarly may face a learning curve given the depth and complexity of ProWritingAid's feature set.
LanguageTool vs ProWritingAid: common questions
Which is better, LanguageTool or ProWritingAid?
LanguageTool scores 5.2 and ProWritingAid 3.9 out of 10 among the AI writing assistants we rate. LanguageTool is ahead on where it works and teams and control. ProWritingAid is ahead on what it helps with.
Is LanguageTool or ProWritingAid cheaper?
LanguageTool's cheapest paid plan is $4.99/mo (Premium, 2-year plan) and ProWritingAid's is $10.00/mo (Premium, billed yearly at $120/yr). Compare what each plan includes below before going on price alone.
What can LanguageTool do that ProWritingAid cannot?
On the facts both vendors publish: writes in a saved voice or style, your own style guide and terms, team plan with shared settings, aPI and personal dictionary.
What can ProWritingAid do that LanguageTool cannot?
On the facts both vendors publish: checks for plagiarism.
