Grammarly’s AI Detector is a specialized tool designed to scan text and estimate the likelihood of it being generated by artificial intelligence models like ChatGPT, Gemini, or Claude. It breaks down content into sections, analyzes language patterns, and provides a percentage score indicating potential AI involvement, helping users maintain originality in writing, academic work, or professional documents.
Is Grammarly’s AI Detector Free or Paid?
Grammarly’s AI Detector offers a free version accessible through its web-based checker, allowing basic scans without any cost. However, for deeper integration into Grammarly’s ecosystem—such as real-time detection within editors, apps, or documents—users need a paid subscription like the Pro plan. This makes it versatile for casual checks while reserving advanced capabilities for premium users who require seamless workflow incorporation.
Grammarly’s AI Detector Pricing Details
Grammarly structures its plans to include AI detection features at higher tiers. Below is a breakdown of the relevant plans, focusing on those that support or enhance the AI detector functionality.
| Plan Name | Price (Monthly / Yearly) | Main Features | Best For |
|---|---|---|---|
| Free | $0 / $0 | Basic grammar and spelling checks; limited AI prompts (100 per month); web-based AI detector access for simple scans. | Casual users needing occasional AI content checks without advanced integration. |
| Pro | $12 / $144 | Full AI detection with plagiarism checks; unlimited personalized suggestions; 2,000 AI prompts per month; integration in editors and apps. | Writers, students, and professionals requiring reliable AI scanning alongside comprehensive editing tools. |
| Enterprise | Custom (contact sales) | Everything in Pro; unlimited AI prompts; advanced security like BYOK encryption; dedicated support; enterprise-scale AI detection. | Large organizations or teams needing scalable AI content verification with robust data protection. |
Also Read-LockedIn AI Free, Alternative, Pricing, Pros and Cons
Best Alternatives to Grammarly’s AI Detector
If Grammarly’s AI Detector doesn’t fully meet your needs, several alternatives provide similar or enhanced capabilities for identifying AI-generated content. The table below compares key options based on their availability, standout features, and direct contrasts.
| Alternative Tool Name | Free or Paid | Key Feature | How it Compares to Grammarly’s AI Detector |
|---|---|---|---|
| Copyleaks | Both (free limited scans; paid for full access) | Over 99% accuracy with multilingual support and model-specific detection (e.g., ChatGPT, Claude). | More accurate in benchmarks with lower false positives; better for mixed human-AI text, but lacks Grammarly’s built-in writing assistance. |
| Originality.ai | Paid (starts at $0.01 per 100 words) | High recall for AI content with detailed reports and plagiarism integration. | Outperforms in detecting bypassed AI text; stronger for content publishers, though more expensive per use than Grammarly’s subscription model. |
| QuillBot AI Detector | Free | Identifies text from major models like GPT-5 and Gemini; simple interface with no word limits. | Comparable accuracy (around 78%) but fully free without upsells; less integrated than Grammarly but ideal for quick, no-cost checks. |
| GPTZero | Both (free for basic; paid for advanced) | Focuses on educational use with sentence-level highlighting and API access. | Better for academic integrity with fewer inconsistencies; similar probabilistic scoring but often flags more AI patterns than Grammarly. |
| Scribbr AI Detector | Both (free version; premium for higher accuracy) | 84% accuracy in premium; no false positives in tests. | More reliable for precise detection without misidentifying human text; a strong paid upgrade option, though it doesn’t offer Grammarly’s editing suite. |
Pros and Cons of Grammarly’s AI Detector
Pros
- Easy integration with Grammarly’s existing writing tools for a seamless experience in editing and detection.
- Provides probabilistic scores and breakdowns, helping users refine content for authenticity.
- Free web access makes it approachable for basic needs without immediate costs.
- Trained on diverse datasets to recognize patterns from multiple AI models.
- Supports responsible AI use by combining with plagiarism checks and authorship tracking.
Cons
- Accuracy can be inconsistent, with lower recall rates (around 22-40% in some tests) leading to missed AI content.
- Prone to false negatives, especially with modified or blended human-AI text.
- Full features require a paid plan, limiting advanced use for free users.
- May bias against non-native English writing styles, potentially flagging them incorrectly.
- Easier to bypass with simple edits compared to specialized detectors.