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Comparison · 2026
Second Opinion Extension vs ZeroGPT & StealthWriter
Second Opinion Extension vs ZeroGPT & StealthWriter: side-by-side comparison of pricing, ratings, and features on SoftwareVital (2026).
Feature lists share 0 overlapping items across the two listings.
free
Second Opinion Extension is a free browser extension that fact-checks selected web text with Grok AI to flag inaccuracies and bias.
VS
free
Free AI content detector that flags text from ChatGPT, Bard, and Bing AI, with StealthWriter for rewriting AI text.
Side-by-side
| Attribute | Second Opinion Extension | ZeroGPT & StealthWriter |
|---|---|---|
| Rating | — | — |
| Reviews | — | — |
| Pricing | free | free |
| Votes | 0 | 0 |
| Category | AI API | AI Checker |
Features checklist
| Feature | Second Opinion Extension | ZeroGPT & StealthWriter |
|---|---|---|
| Free to install and use | ||
| Easy to use with a simple right-click action | ||
| Provides quick fact-checks | ||
| Supports multiple browsers | ||
| Requires a Grok API key | ||
| which incurs token usage costs | ||
| Accuracy depends on Grok AI | ||
| so verification from multiple sources is still recommended | ||
| ZeroGPT.cc is a free tool for detecting ChatGPT-generated content using advanced language models | ||
| It identifies text from AI tools like OpenAI ChatGPT | ||
| Google Bard | ||
| and Bing AI |