Best AI Writing Tools & Assistants

What to look for

• Grammar and style tools work best layered on top of your own writing, not used to generate text from scratch.
• For marketing copy, look for tools with brand-voice or template presets to speed up repetitive formats.
• Always fact-check AI-generated claims before publishing, generation speed doesn't guarantee accuracy.

Free options More free AI tools →

Grammarly, Quillbot, Copy.ai, Wordtune, and Rytr all have a free tier with a monthly cap on words or features.

UUndetectable AIRewrites AI-generated text to read more naturally and lower AI-detector scores. HHumbotAI humanizer focused on preserving meaning while lowering AI-detection scores. PPhraslyHumanizes AI text and checks it against multiple AI detectors in one pass. WWalterWrites AIA simpler, lower-cost AI humanizer for students and everyday writing. GGrammarlyGrammar, tone, and clarity checks across the web. QQuillBotParaphrasing, summarizing, and citation tools. CCopy.aiTemplates for ads, emails, and landing page copy. WWordtuneSentence-level rewriting to fix tone and clarity. RRytrLightweight copywriting for short-form content. DDeepL WriteAI writing assistant that polishes tone, phrasing, and clarity, from the DeepL team. WWritesonicAI writing and SEO platform for articles, ads, and marketing copy. JJenniAI writing assistant built for academic and long-form writing with citations. PPaperpalAcademic writing assistant for researchers, trained on scholarly text. CCompose AIAI autocomplete and rephrasing that speeds up writing everywhere you type. AAI DungeonAn AI-driven text adventure where you can do anything. AAigaixieChinese AI-text detector and humanizing rewriter to lower AIGC flags. XXiezuomaoChinese AI writing cat for error-checking, polishing, and drafting. PPitayaChinese AI writing tool that helps you draft, polish, and correct. WWawa WriterChinese AI creative-writing tool for stories, scripts, and long-form. YYoudao WritingNetEase Youdao's AI assistant for English writing and grammar. XXiyuAlibaba's one-click marketing copy for e-commerce products. IiFlytek HuiweniFlytek's one-stop AIGC content-creation and publishing platform.

AI humanizers

A humanizer is a narrower tool than a general writing assistant: you paste in AI-generated text and it rewrites the sentence structure and word choice to read as human-written and score lower on detectors like Turnitin and GPTZero. Undetectable AI and Phrasly both bundle a detector so you can check the score without leaving the tool; Humbot and WalterWrites focus purely on the rewrite. None of this is foolproof, detection and evasion are both a moving target, so treat a passing score as a data point, not a guarantee.

UUndetectable AIRewrites AI-generated text to read more naturally and lower AI-detector scores. HHumbotAI humanizer focused on preserving meaning while lowering AI-detection scores. SStealthGPTWrites and rewrites text aimed at bypassing AI-content detectors. PPhraslyHumanizes AI text and checks it against multiple AI detectors in one pass. WWalterWrites AIA simpler, lower-cost AI humanizer for students and everyday writing.

FAQ

What's the best AI writing tool?

Grammarly is the standard pick for editing your own writing, Copy.ai and Rytr are built for drafting marketing copy from scratch, and Quillbot is worth adding specifically for paraphrasing and rewriting a rough draft.

Are there free AI writing tools?

Yes, Grammarly, Quillbot, Copy.ai, Wordtune, and Rytr all have a usable free tier, typically capped by monthly word count or feature access rather than blocked outright.

Can AI writing tools replace an editor?

For grammar and style, mostly yes. For judgment calls about tone, structure, or whether a claim is actually true, no; those still need a human pass before anything goes out.

Can AI humanizers bypass AI detectors?

Sometimes, on some detectors, at least for now. Detector accuracy and humanizer effectiveness both keep shifting as each side adjusts to the other, so a result that passes one detector today isn't a guarantee against a different detector or a future update.

Is it safe to use an AI humanizer?

Depends what you mean by safe. There's no malware risk from the mainstream tools listed here, but running AI-assisted work through a humanizer to submit as your own, in school or at work, can still violate an academic-integrity or employer policy even if it passes a detector. That's a policy risk, not a tool problem.