Pick any two writers and ask them which editing tool they use. You will probably get two different answers, and both of them will sound very confident. That
Pick any two writers and ask them which editing tool they use. You will probably get two different answers, and both of them will sound very confident. That is because Grammarly, Hemingway Editor, and ProWritingAid are genuinely different tools. They fix different problems. They work best for different kinds of writing.
After testing all three tools on the exact same 1,500-word document, which included grammar mistakes, passive voice, long sentences, tone issues, awkward phrasing, and structural problems, I can tell you they each handled the job in very different ways. Let me show you what I found.
One important thing to clarify before we get into it. These are editing tools, not AI content generators. Tools like ChatGPT write content from scratch. These three tools fix and improve the writing you have already done. That is a completely different job.
Grammarly works like a smart spell-checker that also watches your tone. It catches grammar errors in real time, suggests clearer phrasing, and checks whether your writing sounds right for your audience. It works inside your browser, Google Docs, Word, and hundreds of other apps.
Hemingway Editor does one thing really well: it tells you where your writing is hard to read. It highlights long sentences, passive voice, extra adverbs, and complex words. The goal is to make your writing bold and clear, like the author it is named after.
ProWritingAid goes deeper than the other two. It runs more than 20 different reports on your writing, covering style, pacing, overused words, sentence length variation, clichés, dialogue tags, and more. It is especially powerful for long-form writing like books or detailed blog posts.
I ran the same 1,500-word test document through each tool. The document had intentional errors across several categories, i.e, ten grammar mistakes, eight passive voice sentences, five overly long sentences, four tone inconsistencies, six awkward phrases, and three structural issues.
I recorded how many issues each tool caught, how useful the suggestions were, and how easy the tool was to use. Here is what came out of the test.
| Category | Grammarly | Hemingway | ProWritingAid |
| Grammar mistakes (10) | 9 caught | 3 caught | 9 caught |
| Passive voice (8) | 6 flagged | 8 flagged | 8 flagged |
| Long sentences (5) | 3 flagged | 5 flagged | 5 flagged |
| Awkward phrases (6) | 5 suggestions | 0 suggestions | 6 suggestions |
| Tone issues (4) | 4 detected | 0 detected | 2 detected |
| Structural problems (3) | 1 detected | 0 detected | 2 detected |
Grammarly was the strongest at tone detection by a wide margin. ProWritingAid was the strongest for overall writing depth. Hemingway was the best for readability, catching every long and hard-to-read sentence. No single tool caught everything.
This is where Hemingway shines. The editor color-codes your writing. Yellow means a sentence is hard to read. Red means it is very hard to read. Blue highlights adverbs. Green flags passive voice. Purple shows complex words that have simpler alternatives.
My test document started at a Grade 12 reading level inside Hemingway. After following its suggestions, I brought it down to Grade 8. For most online content, that is exactly where you want to be.
Grammarly also checks readability, but the feedback is less visual and harder to act on quickly. ProWritingAid provides a full readability report as one of its 20-plus analysis types, but it requires you to run that specific report, which adds a step.
Grammarly and ProWritingAid were both very strong at catching grammar errors. Both missed one of my ten intentional mistakes. Grammarly caught it faster because it works in real time as you type. ProWritingAid requires you to paste text or use its desktop app.
Hemingway Editor is not primarily a grammar tool. Its Plus plan adds basic grammar checks, but the free version does not include them. If grammar accuracy is your top need, Hemingway is not the right starting point.
GrammarlyGO, the AI assistant built into Grammarly, is genuinely impressive for quick rewrites. You can select a sentence, ask it to make it shorter, more professional, or more casual, and it produces a solid result in a few seconds. It also generates outlines, brainstorms ideas, and drafts short sections of text.
ProWritingAid has expanded its AI suggestion tools in 2026, now offering rewrite suggestions inside its reports. The suggestions are useful for long-form writing, but they feel less immediate than Grammarly’s.
Hemingway does not offer AI generation. This is a deliberate choice. The tool believes the writer should do the writing. Whether that is a strength or a limitation depends entirely on what you want from an editing tool.
| Integration | Grammarly | Hemingway | ProWritingAid |
| Browser extension | Yes | No | Yes |
| Google Docs | Yes | No | Yes |
| Microsoft Word | Yes | No | Yes |
| Scrivener | No | No | Yes |
| Desktop app | Yes | Yes (paid) | Yes |
| Offline use | Limited | Yes (desktop) | Yes (desktop) |
| Mobile app | Yes | No | No |
Grammarly wins on integrations. It works inside more apps than any other tool in this comparison, including Gmail, Slack, LinkedIn, and over 500,000 other apps. If you write across many different platforms every day, this matters a lot.
ProWritingAid integrates deeply with Scrivener, which makes it the top choice for book authors who use that software. If you write long-form fiction or nonfiction, that integration alone is a strong reason to choose ProWritingAid.
| Plan | Grammarly | Hemingway | ProWritingAid |
| Free tier | Yes (grammar + spelling) | Yes (web, readability only) | Yes (basic checks only) |
| Monthly paid | $30/month | $10/month (Plus) | $10/month |
| Annual paid | $144/year ($12/month) | $100/year | ~$79/year |
| One-time purchase | No | $19.99 (desktop app) | ~$399 (lifetime) |
| Team plans | Yes (Business) | No | Yes |
The pricing math is important here. Three years of Grammarly Premium costs around $432. ProWritingAid’s lifetime deal costs around $399 and then costs nothing again, ever. If you plan to use an editing tool for years, ProWritingAid’s lifetime option is extremely good value.
Hemingway is the cheapest entry point. The free web version is genuinely useful. The $19.99 desktop app is a one-time cost. If you mainly need readability feedback, you can get a lot out of Hemingway without spending much at all.
Pros: Works everywhere, catches grammar and tone, strong AI rewrite features, mobile app available, best free tier for grammar checking.
Cons: Most expensive option, AI features require paid plan, no Scrivener support, less useful for long-form manuscript analysis.
Pros: Best readability feedback, clean and fast to use, free web version available, one-time desktop purchase, works offline.
Cons: No grammar checking in free version, no browser extension, no integration with Google Docs or Word, no AI generation features.
Pros: Deepest analysis of the three, 20-plus report types, Scrivener integration, lifetime pricing option, does not use your writing to train its AI, strong for fiction writers.
Cons: Learning curve is steeper, slower than Grammarly for real-time editing, free tier is very limited, less polished interface.
| Category | Grammarly | Hemingway | ProWritingAid |
| Grammar accuracy | 9/10 | 5/10 | 9/10 |
| Readability feedback | 6/10 | 10/10 | 8/10 |
| AI rewrite quality | 9/10 | N/A | 7/10 |
| Integrations | 10/10 | 3/10 | 7/10 |
| Value for money | 6/10 | 10/10 | 9/10 |
| Ease of use | 9/10 | 9/10 | 7/10 |
| Long-form writing | 6/10 | 5/10 | 10/10 |
| Overall | 8/10 | 7/10 | 9/10 |
Use Grammarly if: You write across many different apps, you need real-time corrections everywhere you type, you want tone detection and AI rewrites, or you are a business writer or student who needs grammar support in Gmail, Slack, and beyond.
Use Hemingway if: You already know your grammar is decent and you need your writing to be clearer and more direct. It is also a strong companion tool for bloggers and content writers who want a fast readability check before publishing.
Use ProWritingAid if: You write long-form content regularly, especially fiction or detailed blog content. The lifetime deal makes it the best long-term value, and the depth of its analysis is simply not matched by the other two tools.
For most writers, Grammarly is the safest starting point because it works everywhere and catches the most common problems quickly. Try the free tier first and upgrade if you need more.
For serious writers who produce a lot of content, ProWritingAid is the better long-term investment. The lifetime deal is excellent and the depth of feedback goes well beyond what Grammarly offers.
For anyone who wants to improve the clarity of their writing without spending much, Hemingway’s free web version is a surprisingly useful tool that takes seconds to learn.
Many professional writers use all three: Grammarly for daily grammar checking everywhere, ProWritingAid for deep editing passes on longer content, and Hemingway for a quick readability check before hitting publish.
Grammarly is faster and easier for short-form SEO content because it works inside Google Docs and WordPress. ProWritingAid is better for longer articles or pillar pages where deep analysis matters more.
Yes. The Hemingway web app is completely free with no account required. It gives you full readability feedback without paying anything. The paid Plus plan and desktop app add AI rewrites and grammar checking.
Yes, if you write regularly. At around $399 one time, it pays for itself in about two and a half to three years compared to a monthly subscription. After that, you pay nothing.
Grammarly is the most versatile grammar checker for everyday use. ProWritingAid is better for long-form writing. Hemingway is not primarily a grammar checker but is excellent for readability.
