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QuillBot is listed from $8.33 with a free plan, and its appeal is straightforward: quick grammar fixes and unlimited paraphrase rewrites. But if you’re looking for a dependable way to pass AI detectors, don’t assume its humanizer will do that. One Reddit thread describes a QuillBot rewrite getting flagged; that’s an individual report, not proof of a general failure. These alternatives focus on proofreading, longer-form editing or checking AI signals.
01Why people leave QuillBot
Humanizer results aren’t dependable
A Reddit poster says a QuillBot-humanized draft was flagged by Turnitin. Treat that as one user’s report, not a guarantee about your own results.
Detector scores aren’t verdicts
The published reviews warn that AI detection is a signal, not proof. If a score is your main reason to switch, another detector may not settle the question.
You may need a narrower tool
QuillBot’s listed strengths include paraphrasing and grammar fixes. If you need shared style guides, fiction planning or plagiarism checks, consider a tool built around that job.
02The alternatives, ranked by fit
- Best for proofreading
GrammarlyGrammarlySwitch to Grammarly if your main QuillBot use is cleaning up emails, essays or business writing rather than rewriting whole passages. It has a free plan and is listed from $12. Its stated best fits include non-native English speakers and teams using shared style guides, making it a clearer match for proofreading workflows.
Trade-off: The review summary says Pro rewrites and prompts may cost more than casual writers find worthwhile.
6.5/10from
€12/mofree plan - Best for book editing
ProWritingAidProWritingAidProWritingAid is the more relevant switch if you’re working on a book rather than quick paraphrases. Its listed strengths include planning and editing together, plus optional AI suggestions. It has a free plan and is listed from $10; the published summary describes that price as monthly on an annual plan.
Trade-off: The summary flags AI suggestions and monthly billing as potential drawbacks.
6.3/10from
$10/mofree plan - Best for publication checks
Originality.aiOriginality.aiChoose Originality.ai if your reason for leaving is checking drafts before publication, not generating alternate wording. Its listed toolset includes AI detection, plagiarism checks and fact checks, with bulk text scans for teams. It has a free plan and is listed from $12.95. The review summary cautions against treating detection as a verdict.
Trade-off: It’s a checking tool, not a listed replacement for unlimited paraphrase rewrites.
5.8/10from
$12.95/mofree plan - Best for occasional scans
GPTZeroGPTZeroGPTZero fits occasional individual checks better than a paraphrasing-first workflow. It has a free plan, is listed from $12.99, and its stated best fits include individual scans, shared team billing and educator LMS integrations. The published review describes its detection features as broad, while warning that a score is only a signal.
Trade-off: A detection score can’t establish whether writing was AI-generated.
5.8/10from
$12.99/mofree plan - Best for mixed-format checks
Winston AIWinston AIWinston AI is worth considering when you need to review mixed-format submissions or compare detection results, rather than rewrite sentences. The listing includes detection and plagiarism checks, a free plan and a starting price of $10. Its review summary says not to treat the AI score as proof.
Trade-off: It’s aimed at checking submissions, not replacing QuillBot’s paraphrasing workflow.
5.4/10from
$10/mofree plan - Best free starting point
ZeroGPTZeroGPTZeroGPT is the low-commitment option if you want to try bundled writing tools for free or check short text for AI signals. It has a free plan, but no starting price is published. That makes the cost easier to test than a paid-first switch, though the published review warns against treating its detector score as proof.
Trade-off: No starting price is published, and detector results aren’t proof.
5.4/10from
Freefree plan
03Side by side
| Tool | Score | From | Free plan | Best for |
|---|---|---|---|---|
 QuillBot QuillBot (current) | 6.0 | $8.33/mo | Yes | Quick grammar fixes on a budget |
| Grammarly Grammarly | 6.5 | €12/mo | Yes | Non-native English speakers writing business emails |
| ProWritingAid ProWritingAid | 6.3 | $10/mo | Yes | Novelists wanting planning plus editing together |
| Originality.ai Originality.ai | 5.8 | $12.95/mo | Yes | Writers checking drafts before publication |
| GPTZero GPTZero | 5.8 | $12.99/mo | Yes | Occasional individual scans |
| Winston AI Winston AI | 5.4 | $10/mo | Yes | Publishers reviewing mixed-format submissions |
| ZeroGPT ZeroGPT | 5.4 | Free | Yes | Trying AI writing tools for free |
Questions people ask
Which QuillBot alternative is best for proofreading?
Grammarly is the closest fit in this list if your priority is proofreading business emails, essays or theses. It has a free plan and is listed from $12. The published review summary says its Pro rewrites and prompts may cost more than casual writers consider worthwhile.
Can an AI detector prove that text was written by AI?
No detector score should be treated as proof based on the published reviews. The summaries for Originality.ai, GPTZero, ZeroGPT and Winston AI all caution against treating an AI score as a verdict. One Reddit thread also reports a QuillBot rewrite being flagged, but that is an individual account.
Is there a free QuillBot alternative?
Several listed alternatives have free plans: Grammarly, Originality.ai, GPTZero, ZeroGPT, Winston AI and ProWritingAid. ZeroGPT’s starting price is not published; the others are listed from $12, $12.95, $12.99, $10 and $10 respectively. A free plan doesn’t mean every feature is free.