Comparison

StealthGPT vs Quillbot

StealthGPT lands on Depends, and Quillbot lands on Worth it.

StealthGPT

Depends

Confidence: Medium

Buy only after testing it against your specific detector . third-party results conflict with the 99% bypass claim.

Worth it

Confidence: Medium

Buy it if you're a student, non-native English writer, or blogger who wants cheap paraphrasing and grammar cleanup.

StealthGPT versus Quillbot
Compare	StealthGPT	Quillbot
Verdict	Depends	Worth it
Best for	SEO content teams scaling AI drafts	Students editing essays and theses
Who it's not for	Students . Turnitin evasion risks academic-integrity penalties	Anyone relying on its AI detector for high-stakes checks . accuracy is contested
Privacy	No public breaches of StealthGPT found; 465 user credentials tied to the domain appear in cybercrime infostealer logs; encryption claims are self-reported.^⁴	No known public vulnerabilities found in the sources reviewed; GDPR/CCPA trust center is published, though it was named in a 2026 Chrome-extension privacy-risk report.
Support quality	No independent support reviews found	Only a BBB complaint found; little support data
Public sentiment	User feedback is polarized: some reviewers find it effective and fairly priced, while independent tests and detector vendors report inconsistent results.^⁵	Reviews are broadly positive on value and paraphrasing quality, but users and independent testers distrust its AI detector.¹³
Biggest gotcha	465 credentials appear in infostealer logs . use a unique password and 2FA^⁴	Don't trust its AI detector for high-stakes checks . testers and users report misses and false flags.

Anyone relying on its AI detector for high-stakes checks . accuracy is contested
Students trying to beat Turnitin . users report paraphrased text still gets flagged
Teams needing shared, collaborative writing workflows
Publishers wanting a human-editor replacement for serious manuscripts