September 14, 2026 · 5 min read
ZeroGPT Alternatives: Free AI Detectors Compared (2026)
Looking for a ZeroGPT alternative? Here's how the main free AI detectors compare on limits, sign-up, and privacy — including one that runs in your browser.
ZeroGPT is one of the most used free AI detectors, but the free checker is ad-supported, limits how much text you can scan at once, and processes your text on its servers. If you want an alternative, here's how the main options compare.
Free AI detectors compared
| Tool | Sign-up | Free limits | Highlights passages | Where it runs |
|---|---|---|---|---|
| Skrubly | No | Generous | Yes | In your browser |
| ZeroGPT | No | Length limit per check | Yes | Server |
| GPTZero | Yes | Limited free scans | Yes | Server |
| QuillBot | For more words | Word limit on free | Yes | Server |
Why the browser part matters
An essay, a cover letter, or client copy is often something you'd rather not paste into a stranger's server. Skrubly's AI Content Detector analyses the text on your device and doesn't store it, and you can also upload Word or PDF files.
Check your text — free, no sign-up, nothing stored.
Open the AI Content DetectorOne honest caveat
Every detector — ZeroGPT, GPTZero, or ours — gives a probability, not proof, and they regularly disagree on the same text. Use a score to find passages worth revising, not as a verdict.