The difference between AI writing tools and AI writing generators

This is an important distinction that most articles blur. AI writing generators (ChatGPT, Claude, Jasper) create text from scratch. AI writing tools (grammarly, hemingway-editor, prowritingaid) improve text you have already written.

This guide is about the second category. Not because generators are bad, but because writing tools make you a better writer, while generators just make text appear. One is a skill investment. The other is outsourcing.

If you write for a living, or if writing is a significant part of your job, these tools will improve your output measurably. Here is what each one does and how to use it properly.

Grammarly: Your daily driver

grammarly is the most widely used writing tool and it deserves that position. It catches errors across everything you type, runs silently in the background, and improves your writing without requiring you to change your workflow.

What it catches: - Spelling errors (including context-dependent ones like "their" vs "there") - Grammar mistakes (subject-verb agreement, tense consistency, comma usage) - Clarity issues (sentences that are too long, words that are too complex, passive voice overuse) - Tone mismatches (your email sounds more aggressive than you intended)

How to use it properly: - Install the browser extension and forget about it. Let it run in the background. - Pay attention to recurring corrections. If Grammarly keeps flagging the same issue, you have a habit worth breaking. - Do not accept every suggestion blindly. Grammarly sometimes "corrects" intentional stylistic choices. The semicolon you used on purpose is fine, Grammarly. - Use the tone detector for important emails. It is the single most useful feature for professional communication.

Free vs Premium: The free tier catches about 70% of what the premium tier catches. If you write professionally, the premium tier is worth the twelve pounds per month for the tone detection and full-sentence rewrites. If you write casually, the free tier is enough.

Hemingway Editor: The clarity specialist

hemingway-editor does one thing brilliantly: it shows you where your writing is unclear, bloated, or unnecessarily complex.

Paste your text into Hemingway and it highlights problems with a colour-coded system: - Yellow sentences are hard to read (long, convoluted, too many clauses) - Red sentences are very hard to read (rewrite these immediately) - Purple words have simpler alternatives - Blue highlights mark adverbs (which are usually unnecessary) - Green highlights mark passive voice

The readability grade is the headline metric. Hemingway tells you the grade level required to understand your writing. For most professional writing, you want Grade 9 or below. Academic and technical writing can go higher, but if your blog post requires a university degree to parse, you have a problem.

How to use it properly: - Write your first draft without Hemingway open. Do not self-edit while creating. - Paste the finished draft into Hemingway and address the red and yellow highlights first. - Do not aim for zero highlights. Some complex sentences are necessary. The goal is reducing unnecessary complexity, not eliminating all complexity. - The adverb counter is genuinely useful. Most adverbs weaken rather than strengthen your writing. "She ran quickly" is weaker than "She sprinted."

Cost: Free web version. Desktop app is a one-time purchase of about twenty pounds.

Best for: Blog posts, marketing copy, emails, and any writing that needs to be clear and accessible.

ProWritingAid: The deep analyst

prowritingaid offers the most detailed analysis of any writing tool. Where Grammarly gives you corrections and Hemingway gives you readability, ProWritingAid gives you twenty different reports covering everything from sentence structure to pacing to cliche usage.

The reports include: - Style report: Identifies hidden verbs, unnecessary words, and stylistic issues - Structure report: Analyses sentence length variation and paragraph structure - Overused words report: Flags words you use too frequently - Cliches and redundancies report: Catches lazy phrasing - Dialogue report: Analyses dialogue tags and pacing (for fiction writers) - Pacing report: Identifies sections that drag or rush

For long-form writing - novels, reports, academic papers, book-length content - ProWritingAid's depth is unmatched. The ability to see your writing patterns across an entire document helps you identify habits you did not know you had.

How to use it properly: - Run the summary report first to identify your biggest issues. - Focus on one or two reports per editing pass. Trying to fix everything at once is overwhelming. - The "overused words" report is eye-opening. You will discover that you start 15% of your sentences with "The" and use "really" in every other paragraph. - Use it for final editing passes, after you have already done structural and content edits.

Cost: Free tier with limited checks. Premium from about ten pounds per month or a lifetime licence for about two hundred pounds.

Best for: Long-form writers, academics, fiction authors, and anyone who wants deep analysis of their writing patterns.

LanguageTool: The multilingual option

LanguageTool is an open-source grammar checker that supports over 30 languages. For English-only writers, it does not offer much over Grammarly. For anyone who writes in multiple languages, it is invaluable.

The grammar checking is solid (though slightly behind Grammarly for English). The style suggestions are helpful. The real differentiator is consistent quality across languages. If you write in English, German, French, and Spanish, LanguageTool provides reliable checking in all four without needing separate tools.

The browser extension works similarly to Grammarly's, running in the background across all text inputs.

Cost: Free tier is genuinely useful. Premium from about five pounds per month.

Best for: Multilingual writers and teams working across multiple languages.

Wordtune: The sentence-level refiner

wordtune takes a different approach to writing improvement. Instead of flagging errors, it offers alternative ways to phrase your sentences. Highlight a sentence and Wordtune suggests five to ten rewrites, each with a slightly different tone, length, or emphasis.

This is useful when you know what you want to say but cannot find the right words. Instead of staring at a sentence for five minutes trying to make it work, you can see multiple alternatives and pick the one that fits.

The "Casual" and "Formal" modes are particularly useful for adjusting register. Paste in a casual Slack message and Wordtune can suggest a more formal version for an email to a client, or vice versa.

Cost: Free tier with limited rewrites per day. Premium from about ten pounds per month.

Best for: Non-native English speakers, anyone who writes across multiple registers, and writers who get stuck on phrasing.

The writing tool stack I recommend

For most people: grammarly Free. Install it, forget it is there, benefit from it constantly.

For professional writers: grammarly Premium + hemingway-editor Free web version. Grammarly for daily correction, Hemingway for clarity checks on important pieces.

For long-form writers: Add prowritingaid for deep analysis. The combination of Grammarly for surface errors and ProWritingAid for structural analysis covers all bases.

For multilingual writers: LanguageTool Premium instead of Grammarly. Consistent quality across languages matters more than slightly better English checking.

For everyone: Write first, edit second. No writing tool can improve a blank page. Get your thoughts down without any tool running, then use these tools to make what you wrote clearer, more correct, and more effective. The tools improve your expression. The thinking still has to be yours.