WriteHumanwritehuman.ai
Humanizes AI text with multiple output variations and includes text and image AI detectors.
- Green flag: Free plan
- Green flag: Cancel online
- Green flag: Some credits roll over
AI detectors and humanizers
20 tools · 14 with a free plan · 4 trial only · 18 with an API · middle starting price $14.99 a month
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AISEO (Humanizer)aiseo.ai
AI SEO writing suite with an 'bypass AI detection' humanizer, paraphraser and readability tools.
Originality.aioriginality.ai
Credit based AI and plagiarism checker with fact checking and readability, aimed at web publishers.
- Green flag: Free plan
- Green flag: Cancel online
- Red flag: Credits reset monthly
Copyleakscopyleaks.com
AI content and plagiarism detector covering 30+ languages, AI images and code, with education LMS integrations.
- Green flag: Free plan
GPTZerogptzero.me
AI writing detector with sentence highlighting, plagiarism checks, writing replay and classroom integrations.
- Green flag: Free plan
HIX Bypasshixbypass.com
HIX.AI's humanizer that rewrites AI text with Fast, Aggressive and Latest modes plus a detector.
- Green flag: Free plan
Netus AInetus.ai
Credit based AI bypasser and paraphraser with summarizer, readability and SEO writing tools.
- Green flag: Free plan
- Green flag: No card for trial
- Green flag: Doesn't train on your data
- Red flag: Credits reset monthly
Pangram Labspangram.com
Research backed AI text and image detector with very low false positives and LMS integrations.
- Green flag: Free plan
- Green flag: Doesn't train on your data
Sapling (AI Detector)sapling.ai/ai-content-detector
Writing assistant with an AI detector and low cost metered detection API for developers.
- Green flag: Free plan
- Green flag: No card for trial
Undetectable AIundetectable.ai
Rewrites AI generated text to read as human written and includes an AI detector and auto typer.
Winston AIgowinston.ai
AI text, image and plagiarism detector with OCR, sentence prediction maps and shareable reports.
Walter Writes AIwalterwrites.ai
AI humanizer and detector with high word allowances, 80+ languages and team plans.
- Green flag: Free plan
- Green flag: No card for trial
Phraslyphrasly.ai
Unlimited AI humanizer with Balanced/Strong/Max modes, content generator and plagiarism checker.
StealthGPTstealthgpt.ai
AI humanizer and detector that rewrites text to avoid AI detection, with an iOS app and Chrome extension.
- Green flag: Cancel online
- Green flag: Credits don't expire
- Red flag: No free plan
Hive (AI-generated content detection)thehive.ai/apis/ai-generated-content-classification
Multimodal API and free Chrome extension detecting AI generated images, video, audio deepfakes and text.
- Green flag: Free plan
Free
Free plan · Contact sales
Visit site Hive (AI-generated content detection) (opens the tool's site)
Humbothumbot.ai
AI humanizer with Quick/Enhanced/Advanced modes, plus checker, plagiarism and translation tools sharing credits.
- Green flag: Free plan
- Green flag: Refunds within 30 days
ZeroGPTzerogpt.com
Free, ad supported AI text detector with paid tiers for longer checks plus writing tools.
- Green flag: Free plan
- Green flag: No card for trial
- Green flag: Doesn't train on your data
Scribbr (AI Detector)scribbr.com/ai-detector
Free student focused AI detector labeling text as AI generated, AI refined or human, by paragraph.
- Green flag: Free plan
BypassGPTbypassgpt.ai
Rewrites AI text in Fast, Creative or Enhanced mode, with a built in AI checker and watermark removal.
- Green flag: Free plan
- Green flag: Refunds within 3 days
Turnitin (AI writing detection)turnitin.com/solutions/topics/ai-writing
Institution licensed similarity checker with an AI writing and AI paraphrase indicator built into LMS workflows.
- Red flag: No free plan
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No free plan · Contact sales
Visit site Turnitin (AI writing detection) (opens the tool's site)No tools match all of those filters
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Questions
Which detectors and humanizers tools have a free plan?
14 of the 20 tools here have a free plan and 4 more offer a free trial only. Each listing says what the free plan includes, because the limits differ a lot.
How much do detectors and humanizers tools cost?
Cheapest paid plans run from $7.99 to $29.99 a month across 16 tools that publish a price. The middle one is $14.99. Prices are monthly billing from each tool's own pricing page, checked Oct 16, 2026.
Which detectors and humanizers tools let unused credits roll over?
2 of these tools say on their own pages that at least some unused credits carry over: WriteHuman, StealthGPT. Use the Unused credits roll over filter, or see which AI credits roll over.
Can I cancel these detectors and humanizers tools online myself?
3 of the 20 tools here say you can cancel online yourself without contacting support. Each tool page shows how, quoted from the tool's help pages.
Which detectors and humanizers tools can I try without a credit card?
4 tools say no credit card is needed to start. Filter by No card for the trial.
Which detectors and humanizers tools don't train on my data?
3 tools say on their privacy or terms pages that your data is not used to train their models.
Are any detectors and humanizers tools HIPAA compliant?
1 states HIPAA compliance or a BAA: Sapling. Coverage is often limited to an enterprise plan; check the quote on each tool page.