# Second Opinion Alternatives

12 alternatives to Second Opinion (0 monthly visits, Freemium), matched by function and use case.

About Second Opinion: Fact-check and bias-check any text while you browse — [Profile (Markdown)](https://openaitools.app/tool/second-opinion.md)

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Compare |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [Detecting-AI.com](https://openaitools.app/tool/detecting-ai-com) | 505,146 | +493% | Freemium, Paid | AI detector that highlights evidence, not just a score | [Second Opinion vs Detecting-AI.com](https://openaitools.app/compare/detecting-ai-com-vs-second-opinion.md) |
| 2 | [Grokipedia](https://openaitools.app/tool/grokipedia) | 1,728,388 | +6.9% | Free | An open, AI-written encyclopedia built and fact-checked by Grok | [Second Opinion vs Grokipedia](https://openaitools.app/compare/grokipedia-vs-second-opinion.md) |
| 3 | [Sider](https://openaitools.app/tool/sider) | 2,644,740 | -10.6% | Freemium | AI sidebar and browser agent for reading, writing and research | [Second Opinion vs Sider](https://openaitools.app/compare/second-opinion-vs-sider.md) |
| 4 | [GPTZero](https://openaitools.app/tool/gptzero-me) | 23,246,989 | +32.5% | Freemium, Paid | AI detection and writing verification built for schools and editors | [Second Opinion vs GPTZero](https://openaitools.app/compare/gptzero-me-vs-second-opinion.md) |
| 5 | [Critique](https://openaitools.app/tool/critique) | 0 | -100% | Freemium | Autonomous fact-checking that appears right next to the content you read | [Second Opinion vs Critique](https://openaitools.app/compare/critique-vs-second-opinion.md) |
| 6 | [factfully](https://openaitools.app/tool/factfully) | 0 | — | Contact for Pricing | factfully is a Chrome extension that acts as an AI-driven misinformation checker, evaluating statements in the pages you read and helping you gauge whether content is likely true or biased. | [Second Opinion vs factfully](https://openaitools.app/compare/factfully-vs-second-opinion.md) |
| 7 | [Truth Keeper](https://openaitools.app/tool/truth-keeper) | 0 | — | Free | AI-powered Chrome extension that scores any text for truthfulness | [Second Opinion vs Truth Keeper](https://openaitools.app/compare/second-opinion-vs-truth-keeper.md) |
| 8 | [ZeroGPT Plus](https://openaitools.app/tool/zerogpt-plus) | 134,635 | +21% | Freemium | Free AI detector with sentence-level reports for ChatGPT, Gemini & Claude text | [Second Opinion vs ZeroGPT Plus](https://openaitools.app/compare/second-opinion-vs-zerogpt-plus.md) |
| 9 | [HARPA AI](https://openaitools.app/tool/harpa-ai) | 537,461 | +99.3% | Freemium | One browser agent that combines every major AI model with web automation | [Second Opinion vs HARPA AI](https://openaitools.app/compare/harpa-ai-vs-second-opinion.md) |
| 10 | [HighlightFactCheck](https://openaitools.app/tool/highlightfactcheck) | 0 | 0% | Freemium | Highlight a claim, get an evidence-backed verdict before you share it | [Second Opinion vs HighlightFactCheck](https://openaitools.app/compare/highlightfactcheck-vs-second-opinion.md) |
| 11 | [Grok Button](https://openaitools.app/tool/grok-button) | 461 | -92.9% | Free | One-click Grok access from anywhere in your browser | [Second Opinion vs Grok Button](https://openaitools.app/compare/grok-button-vs-second-opinion.md) |
| 12 | [ClaimValidator](https://openaitools.app/tool/claimvalidator) | 0 | — | Free | AI that checks whether Reddit claims are actually backed by their sources | [Second Opinion vs ClaimValidator](https://openaitools.app/compare/claimvalidator-vs-second-opinion.md) |

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Source: https://openaitools.app/alternatives/second-opinion

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