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Phrasly
Humanizes AI text and bundles an AI detector, plagiarism checker and content generator.
Academic & Student Tools from USD 10.99
The best humanizer and detector APIs
Products where you can read the endpoint documentation before paying, and where the pricing unit is a word or a credit rather than a sales call.
Read this before the list
Per-word pricing looks cheap until you multiply by volume. Check the rate limit as carefully as the price.
| # | Tool | Level | Price | Free tier |
|---|---|---|---|---|
| 1 | Phrasly Humanizes AI text and bundles an AI detector, plagiarism checker and content generator. | Docs checked API | USD 10.99 | - |
| 2 | CudekAI Credit-based undetectable AI humanizer bundled with AI text, image and video detectors and a plagiarism checker. | Docs checked API | USD 6.00 | - |
| 3 | GPTHuman AI AI humanizer with per-output word caps, watermark removal for ChatGPT and Claude, and a humanizer API. | Docs checked API | USD 8.25 | 300 words |
| 4 | HIX Bypass Rewrites AI text in Fast, Aggressive or Latest mode and scores it with a bundled AI detector. | Docs checked API | USD 14.99 | Yes |
| 5 | Rephrasy AI humanizer with day-pass, subscription and lifetime plans, plus humanizer and AI detector APIs. | Docs checked API | USD 8.25 | - |
| 6 | StealthGPT Rewrites AI text and auto-types the result into web fields via a Chrome extension. | Docs checked API | USD 30.00 | - |
| 7 | WriteHuman Rewrites AI text into human-style output with multiple variations per request and AI detection checks. | Docs checked API | USD 20.00 | 250 words |
| 8 | Copyleaks AI Content Detector Enterprise AI and plagiarism detection in one report, with LMS integrations and 30+ language support. | Docs checked API | USD 13.99 | Yes |
| 9 | Detecting-AI Free AI detector taking 15,000 characters per scan without signup, plus detector and humanizer APIs. | Docs checked API | USD 7.00 | Yes |
| 10 | Isgen Multilingual AI detector with sentence-level highlighting, bulk scanning and an academic-priced plan. | Docs checked API | USD 8.00 | Yes |
| 11 | Originality.ai AI detection plus plagiarism, fact and readability checks aimed at web publishers and content agencies. | Docs checked API | USD 12.95 | 2000 words |
| 12 | Pangram Labs Research-led AI text detector for schools and platforms, with a free daily quota and a usage-based API. | Docs checked API | USD 20.00 | 2000 words |
| 13 | Sapling AI Content Detector Free AI content detector with sentence-level scores, a Chrome extension and a metered developer API. | Docs checked API | USD 12.00 | Yes |
| 14 | Undetectable.ai AI Detector Free no-signup detector that aggregates results from several third-party AI detection models at once. | Docs checked API | USD 5.00 | Yes |
| 15 | Winston AI AI text, image and deepfake detection with plagiarism checking and site certification for publishers. | Docs checked API | USD 10.00 | 2000 words |
Docs checked API New
CudekAI
Credit-based undetectable AI humanizer bundled with AI text, image and video detectors and a plagiarism checker.
AI Detector Bypassers from USD 6.00
Docs checked API New
GPTHuman AI
AI humanizer with per-output word caps, watermark removal for ChatGPT and Claude, and a humanizer API.
AI Detector Bypassers from USD 8.25
Docs checked API New
HIX Bypass
Rewrites AI text in Fast, Aggressive or Latest mode and scores it with a bundled AI detector.
AI Detector Bypassers from USD 14.99
Docs checked API New
Rephrasy
AI humanizer with day-pass, subscription and lifetime plans, plus humanizer and AI detector APIs.
AI Detector Bypassers from USD 8.25
Docs checked API New
StealthGPT
Rewrites AI text and auto-types the result into web fields via a Chrome extension.
AI Detector Bypassers from USD 30.00
Docs checked API New
WriteHuman
Rewrites AI text into human-style output with multiple variations per request and AI detection checks.
AI Detector Bypassers from USD 20.00
Docs checked API New
Copyleaks AI Content Detector
Enterprise AI and plagiarism detection in one report, with LMS integrations and 30+ language support.
AI Detectors from USD 13.99
Docs checked API New
Detecting-AI
Free AI detector taking 15,000 characters per scan without signup, plus detector and humanizer APIs.
AI Detectors from USD 7.00
Docs checked API New
Isgen
Multilingual AI detector with sentence-level highlighting, bulk scanning and an academic-priced plan.
AI Detectors from USD 8.00
Docs checked API New
Originality.ai
AI detection plus plagiarism, fact and readability checks aimed at web publishers and content agencies.
AI Detectors from USD 12.95
Docs checked API New
Pangram Labs
Research-led AI text detector for schools and platforms, with a free daily quota and a usage-based API.
AI Detectors from USD 20.00
Docs checked API New
Sapling AI Content Detector
Free AI content detector with sentence-level scores, a Chrome extension and a metered developer API.
AI Detectors from USD 12.00
Docs checked API New
Undetectable.ai AI Detector
Free no-signup detector that aggregates results from several third-party AI detection models at once.
AI Detectors from USD 5.00
Docs checked API New
Winston AI
AI text, image and deepfake detection with plagiarism checking and site certification for publishers.
AI Detectors from USD 10.00