Free QuillBot AI detector alternative
Check any text for AI with no account and no nudge toward a paraphraser. Free, private, and nothing you paste is kept.
Check your textHow to read your AI detector score
The AI detector gives you a single number from 0 to 100. It is the estimated chance that AI wrote the text, not a yes or no. Here is what each band means.
Probably a person
Reads like human writing. We did not pick up the patterns a model tends to leave behind.
Hard to say
Some of it leans one way, some the other. Read it yourself before you draw a conclusion.
Probably AI
This has the marks of machine-written text. Read it closely before you conclude anything.
How this QuillBot alternative works
Three steps, a few seconds, no setup.
Add your text
Paste it, upload a Word or PDF file, or drop in a link to the page you want to check.
We check the patterns
The model weighs your text against the patterns of AI writing and human writing, the same job QuillBot's AI checker does.
Read the score
You get a number from 0 to 100 and a plain read on how likely AI was involved.
AI Detector vs QuillBot
QuillBot is primarily a paraphrasing and writing suite that also offers an AI detector. The detector works, but the product is built to sell you the rest of the suite. This tool is only a detector, with no account and no upsell, which keeps the check quick and neutral.
| At a glance | RoboSnitch | QuillBot |
|---|---|---|
| Price | Free | Free detector, paid writing suite |
| What it is | A dedicated AI detector | A writing platform with a detector |
| Free limit | No cap | 6 scans a day, 1,200 words each |
| Account | None needed | Prompts sign-up |
| Input | Paste, Word, PDF, or link | Paste |
Detecting versus rewriting
It is worth being clear: paraphrasing tools are often used to hide AI writing, while detectors try to surface it. We have stayed on the detection side on purpose. The honest use of a detector is to check and improve your own work, not to play cat and mouse with it.
Where your text goes
The check happens in memory on our own server. As soon as you have a score, your text is dropped. No logs, no database, no training set.
There is no account holding a history of your checks either.
QuillBot AI detector FAQ
Is this a free QuillBot alternative?
Yes. It's free with no account, and it isn't affiliated with QuillBot.
Is QuillBot's AI detector accurate?
It's reasonable, but no detector is perfect. Treat any score as a signal rather than proof.
Do I need an account?
No. Paste, upload a file, or drop in a link and check right away.
Do you store what I check?
No. It's analyzed in memory and dropped as soon as you get a score.
Which AI models does it catch?
A broad mix, including ChatGPT, Claude, Gemini and Llama.