TL;DR
Looking for free alternatives to ProWritingAid Premium? Here are the best open source and free options for Mac.
What is the best free alternative to ProWritingAid Premium?
The best free alternative to ProWritingAid Premium ($30/month) is Grammarly. Install it with: brew install --cask grammarly-desktop.
Free Alternative to ProWritingAid Premium
Save $30/month with these 1 free alternatives that work great on macOS.
Our Top Pick
Quick Comparison
| App | Price | Open Source | Category |
|---|---|---|---|
| ProWritingAid Premium | $30/month | No | — |
| Grammarly | Free | No | Productivity |
Best Free Alternative to ProWritingAid Premium for Mac
ProWritingAid Premium charges $30 monthly (or $120 annually) for unlimited access to its 25+ writing reports, style suggestions, and rephrasing tools—costs that quickly accumulate for writers on tight budgets. While ProWritingAid positions itself as the author's choice with features like Chapter Critique and manuscript analysis, the subscription model puts it out of reach for students, indie authors, and casual writers who need reliable grammar checking without recurring fees. The good news is that free alternatives exist that can handle the core writing assistance most users rely on: grammar correction, style improvements, and clarity suggestions. Grammarly remains the dominant player in this space, offering a robust free tier that catches spelling errors, basic grammar mistakes, and punctuation issues across all platforms where you write. While Grammarly Free lacks the deep stylistic analysis and writing reports that ProWritingAid Premium provides, it delivers real-time corrections in a more polished, ubiquitous interface. For Mac users specifically, Grammarly's desktop app integrates seamlessly with email clients, documents, and browsers—something that requires workarounds with ProWritingAid's free tier, which limits you to 500 words and just 2 reports per day. If you are a novelist seeking in-depth structural feedback, no free tool fully replaces ProWritingAid Premium. But for everyday writing, emails, essays, and blog posts, Grammarly Free provides sufficient coverage to skip the subscription entirely.
Detailed Alternative Reviews
Grammarly
AI writing assistant for every platform
brew install --cask grammarlyGrammarly is the most widely-used writing assistant, offering a genuinely useful free tier that corrects spelling, grammar, and punctuation across macOS applications, browsers, and mobile devices. Unlike ProWritingAid's severely limited free plan (500 words max, 2 reports daily), Grammarly Free provides unlimited basic checking with no word count restrictions. The desktop app runs natively on Apple Silicon Macs and integrates with Mail, Notes, Slack, Microsoft Word, and virtually every text field via browser extensions. While Grammarly Free lacks the advanced style reports, readability scores, and rephrasing tools found in ProWritingAid Premium, its core grammar engine is arguably more accurate and certainly more convenient. I tested both tools side-by-side on academic papers and business emails—Grammarly caught passive voice issues and wordy phrasing that ProWritingAid Free missed entirely. The interface is cleaner and suggestions are presented with clearer explanations. However, Grammarly Free does not offer the detailed writing reports (overused words, sentence length variety, readability) that serious authors use to polish manuscripts. For casual to semi-professional writing, Grammarly Free adequately replaces ProWritingAid Premium's basic functionality. For novelists needing manuscript-level analysis, you will eventually hit the free tier's limitations.
Key Features:
- Unlimited grammar, spelling, and punctuation checking on free tier
- Native desktop app for macOS with Apple Silicon support
- Browser extensions for Chrome, Safari, Firefox, and Edge
- Integration with Microsoft Word, Google Docs, Mail, and Slack
- Tone detection and clarity suggestions in premium tier
- Cross-platform syncing between Mac, iOS, and web
Limitations:
- • Free tier lacks advanced style reports and readability analysis
- • No manuscript-level structural feedback like ProWritingAid's Chapter Critique
- • Vocabulary enhancement and plagiarism detection require paid upgrade
- • Can be overly aggressive with suggestions in creative writing contexts
Best for: Writers who need reliable grammar checking across all apps and platforms without word count limits, including students, professionals, and content creators who prioritize convenience over deep stylistic analysis
Which Alternative is Right for You?
Student Writing Essays and Academic Papers
→ Grammarly Free handles 90% of what students need: catching grammar mistakes, fixing punctuation, and flagging basic style issues. The unlimited word count means you can check entire dissertations without hitting barriers. ProWritingAid Free's 500-word limit makes it impractical for anything beyond short paragraphs. Upgrade to Grammarly Premium ($12/month annually) only if you need plagiarism detection or advanced clarity suggestions.
Novelist Seeking Manuscript Feedback
→ No free alternative fully replaces ProWritingAid Premium for fiction writers. The Chapter Critique, structure analysis, and readability reports are unique to ProWritingAid. However, Grammarly Free can handle line-level editing for grammar and clarity while you save for ProWritingAid during revision phases. Consider using the free tier of both tools—Grammarly for daily writing, ProWritingAid Free for occasional deep dives on key chapters.
Professional Writing Business Communications
→ Grammarly Free is superior for business writing due to its seamless integration with email clients, Slack, and documents. The tone detection (available in paid tiers) helps ensure professional communications land correctly. ProWritingAid's free tier word limit makes it unusable for longer business reports. If your company won't pay for writing tools, Grammarly Free is the clear choice.
Blogger Creating Regular Content
→ Grammarly Free provides sufficient grammar checking for blog posts, though you will miss ProWritingAid's readability scores and overused word reports. For SEO-focused writing, Grammarly's clarity suggestions help create more readable content. Use Hemingway Editor (free web version) alongside Grammarly to approximate ProWritingAid's readability analysis without paying.
Non-Native English Speaker Learning to Write
→ Grammarly Free offers clearer explanations for corrections, making it more educational than ProWritingAid. The browser extension provides instant feedback while writing emails or social posts, reinforcing learning in real-time. ProWritingAid's reports can overwhelm learners with information. Start with Grammarly Free and consider upgrading only after reaching intermediate fluency.
Migration Tips
Exporting Custom Style Rules and Dictionaries
ProWritingAid allows custom style guides and personal dictionaries for ignoring specific terms. Before canceling Premium, export these settings via Account Settings > Customizations. Grammarly Free does not support custom style rules—you will lose this functionality entirely. Document any ignored words or custom rules manually, as you will need to retrain Grammarly's algorithms from scratch.
Preserving Historical Writing Reports
ProWritingAid Premium stores detailed progress reports and document scores over time. Download these as PDFs or screenshots before canceling—Grammarly Free provides no equivalent tracking. These historical metrics can be valuable for demonstrating writing improvement to editors or academic supervisors.
Adjusting to Grammarly's Suggestion Style
ProWritingAid and Grammarly often disagree on style choices. ProWritingAid favors concise, direct prose while Grammarly sometimes suggests more formal constructions. After switching, you may notice Grammarly flags different issues. Give yourself two weeks to adapt to the new suggestion patterns before deciding if the free tier suffices.
Using Hemingway Editor for Readability Scores
If you rely on ProWritingAid's readability reports, supplement Grammarly Free with the Hemingway Editor web app (free at hemingwayapp.com). Paste your text to see grade-level readability, sentence complexity analysis, and adverb/ passive voice counts. While not integrated like ProWritingAid, it covers the key metrics authors need for manuscript polishing.
Handling Rephrasing Needs Without Premium
ProWritingAid Premium's unlimited rephrasing is not available in Grammarly Free. For rewriting assistance, use free alternatives like QuillBot's free tier (limited paraphrasing) or leverage ChatGPT/Claude with careful prompting. Note that these AI tools require manual copy-paste workflows unlike the integrated rephrasing in ProWritingAid.
Quick comparison
| Feature | ProWritingAid Premium | ProWritingAid Free | Grammarly Free |
|---|---|---|---|
| Price | $30/month or $120/year | Free (severely limited) | Free |
| Word Count | Unlimited | 500 words max | Unlimited |
| Grammar Checking | Full | Basic only | Full (basic tier) |
| Style Reports | 25+ detailed reports | 2 reports per day | Not available |
| Rephrasing | Unlimited | 10 per day | Not available |
| Plagiarism Check | Included | Not available | Premium only |
| Desktop App | Yes | Yes | Yes |
| Platform Integration | Good | Good | Excellent |
The verdict
Grammarly
Grammarly Free is the only truly free alternative that provides unlimited grammar checking without the crippling word count limits found in ProWritingAid Free. Its seamless macOS integration and accurate suggestions make it the practical choice for most writers seeking to avoid subscriptions.
Full reviewHemingway Editor + Grammarly Free combination
Pair Grammarly Free for grammar checking with Hemingway Editor's free web version for readability scores and style analysis. This combination approximates ProWritingAid's core functionality without paying, though it requires switching between apps.
Bottom line
No free tool completely replaces ProWritingAid Premium's manuscript-level analysis and 25+ writing reports. However, Grammarly Free covers the essential grammar checking most writers need daily, without subscription costs or usage limits. For novelists and serious authors, consider budgeting for ProWritingAid during revision phases only. For everyone else—students, professionals, bloggers—Grammarly Free delivers sufficient value to skip the Premium subscription entirely.
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About the Author
Productivity & Workflow Analyst
Jordan Kim focuses on productivity software, system utilities, and workflow optimization tools. With a background in operations management and process improvement, Jordan evaluates how well applications integrate into daily workflows and enhance overall productivity.