Best AI tools to detect AI content
Top picks at a glance:
- WriteHuman — Users needing to detect ai-generated images and transform text.
- GPTZero — General users identifying text generated by large language models.
- Aithor — Students and researchers requiring assistance with academic texts.
- Scribbr — Academic users requiring proofreading and citation management.
- Walter Writes AI — Professionals needing mobile-friendly detection and humanization tools.
| Tool | What it does | Pricing | Free tier | Refunds |
|---|---|---|---|---|
| WriteHuman | Transform AI text into natural writing. | Free tier; paid from $12/mo | Yes | None stated |
| GPTZero | AI detection software that identifies text generated by large language models. | Free tier; paid from $12.99/mo | Yes | None stated |
| Aithor | An AI writing assistant for generating essays, research papers, and academic texts with verifiable sources. | Free tier; paid from $12.50/mo | Yes | 14 days |
| Scribbr | A platform offering academic proofreading, plagiarism detection, citation generation, and various AI-based writing and editing tools. | Free tier | Yes | — |
| Walter Writes AI | An AI humanizer and detection platform that rewrites AI-generated text to sound natural and identifies AI-written content. | Free tier; paid from $8/mo | Yes | 3 days |
— means the vendor does not state it on the pages we read.
How do I choose an AI tool to detect ai content?
Choosing the right tool depends on your specific environment and budget. First, identify if you need specialized access; for instance, Scribbr is limited to education-related documents. Consider your technical setup by checking if you require API support or mobile apps, where Walter Writes AI offers the widest platform compatibility. Review the financial commitment carefully, noting that while all provide free tiers, paid plans vary from $8 to $12.99 per month. If you are wary of permanent subscription charges, look for tools with defined refund windows like Aithor or Walter Writes AI, rather than those that explicitly state no refunds. Finally, weigh the stated limits, such as whether a tool guarantees detection avoidance or warns that it is not 100% accurate, to ensure the software matches your risk tolerance.
WriteHuman
Visit WriteHumanwritehuman.aiCancellation & refund terms for WriteHuman
Best for: Users needing to detect ai-generated images and transform text.
This tool transforms AI text into natural writing and is uniquely capable of identifying ai-generated images. It offers a free tier and paid plans starting at $12 per month across web, iOS, and Android. Note that it cannot generate original content and offers no guarantee of bypassing detection.
AI Image Detector Detect AI-generated images
Pricing, in their words: “Monthly Yearly3 months free You're saving up to $72/year with annual billing” (pricing)
Subscription terms they state: cancel in-app · auto-renews · states no refunds (source)
Limits the vendor states:
- cannot generate original content
- cannot guarantee detection bypass
GPTZero
Visit GPTZerogptzero.meCancellation & refund terms for GPTZero
Best for: General users identifying text generated by large language models.
This software specializes in identifying text generated by large language models in real-time. It is accessible via web and Chrome extensions with API support available. It is not intended for commercial use and is not 100% accurate.
Detect AI in real-time while you browse the internet
Pricing, in their words: “$12.99/ month, billed annually” (pricing)
Subscription terms they state: cancel in-app · auto-renews · states no refunds (source)
Limits the vendor states:
- not for commercial use
- not 100% accurate
Aithor
Visit Aithoraithor.comCancellation & refund terms for Aithor
Best for: Students and researchers requiring assistance with academic texts.
Aithor acts as an AI writing assistant for generating essays and research papers alongside its detection capabilities. It functions on the web with API support and offers a 14-day refund window. It does not provide a guarantee of 100% undetectability.
Paste or upload any text, so I can give you a quick and reliable estimate on the percentage of AI-generated parts.
Pricing, in their words: “Best Value Twice a year 55% off $166.6 $74.99 $12.5/ month” (pricing)
Subscription terms they state: cancel in-app · auto-renews · 14-day refund window (source)
Limits the vendor states:
- No guaranteed 100% undetectability
Scribbr
Visit Scribbrscribbr.com
Best for: Academic users requiring proofreading and citation management.
Scribbr offers a suite of tools for academic proofreading, citation generation, and plagiarism checks. Its detection features are strictly limited to education-related documents. Users must cancel subscriptions by email, and certain AI proofreader checks cannot be cancelled.
The add-on AI detector is powered by Scribbr's proprietary software and is capable of detecting texts generated by ChatGPT, Perplexity and other generative AI tools
Pricing, in their words: “We believe that every student should have the right tools for academic success. Free tools like a paraphrasing tool, AI Humanizer, grammar checker, summarizer and an AI Proofreader.” (pricing)
Subscription terms they state: cancel by email (source)
Limits the vendor states:
- The Document must be education related.
- Cannot cancel Plagiarism, Citation, Self-Plagiarism, or AI proofreader checks.
Walter Writes AI
Visit Walter Writes AIwalterwrites.ai
Best for: Professionals needing mobile-friendly detection and humanization tools.
This platform rewrites text to sound natural while identifying AI-written content across web, mobile, and browser extensions. It is the only option noted for use with HIPAA or FISMA-regulated data. It offers a 3-day refund window and a paid tier starting at $8 per month.
an AI Detector that scans content to estimate AI-likelihood.
Pricing, in their words: “Starter 30,000 words/month $ 8 Per month , Billed $96 Annually” (pricing)
Subscription terms they state: cancel in-app · auto-renews · 3-day refund window (source)
Limits the vendor states:
- guarantee avoidance of ai detection
- use for hipaa/fisma-regulated data
Which one for your situation?
- You are a visual artist looking to identify if digital files were created by machines. → WriteHuman: It is the only tool listed that specifically performs the task of detecting ai-generated images.
- You are a teacher needing to identify if student work was generated by large language models. → GPTZero: It is explicitly designed to identify text generated by large language models and provides an API for integration.
- You are a university student checking an essay for academic integrity. → Aithor: It is an AI writing assistant tailored for research papers and academic texts with verifiable sources.
- You are a researcher working on an academic paper and need a professional verification check. → Scribbr: It provides a specific platform for academic proofreading and plagiarism detection limited to education-related documents.
- You are a professional requiring a tool that works across mobile devices and browsers for strict regulatory compliance. → Walter Writes AI: It is an AI humanizer and detection platform compatible with web, iOS, Android, and Chrome, suitable for HIPAA/FISMA-regulated data.
FAQ
Is there a free tool to detect ai content?
Yes — WriteHuman, GPTZero, Aithor, Scribbr, Walter Writes AI offer a free tier.
What is the cheapest paid option to detect ai content?
Walter Writes AI starts at $8/month.
Which of these have an API?
WriteHuman, GPTZero, Aithor, Scribbr, Walter Writes AI document a developer API.
How do I cancel these subscriptions?
WriteHuman: cancel in-app; GPTZero: cancel in-app; Aithor: cancel in-app; Scribbr: cancel by email; Walter Writes AI: cancel in-app.
Can I get a refund?
WriteHuman states it does not offer refunds; GPTZero states it does not offer refunds; Aithor states a 14-day refund window; Walter Writes AI states a 3-day refund window. The other (Scribbr) do not state a refund policy on the pages we read.
Do these subscriptions auto-renew?
WriteHuman, GPTZero, Aithor, Walter Writes AI state that paid plans renew automatically. Check the billing page before subscribing; the rest do not state it either way.
Sources
Every fact above was read from the vendors' own pages: