13 July 2026 · 5 min read
Copyleaks Alternatives: Free AI Detectors Compared (2026)
Free Copyleaks alternatives in 2026 for checking text for AI writing, compared side by side, including one that runs entirely in your browser.
Copyleaks is a capable AI and plagiarism detector, but the AI checker is behind a login and a limited free quota. If you just want to quickly see whether some text reads as AI-written — no account, no word cap — a free Copyleaks alternative like Skrubly's AI Content Detector runs in your browser and highlights the most AI-like passages. Here's how the main options compare.
Free AI detectors compared
| Tool | Free | Sign-up | Highlights AI passages | Runs in browser |
|---|---|---|---|---|
| Skrubly | Yes | No | Yes | Yes |
| Copyleaks | Limited | Yes | Yes | No (server) |
| GPTZero | Limited | Yes | Yes | No (server) |
| ZeroGPT | Yes | No | Basic | No (server) |
How to check your text for free
- Open Skrubly's AI Content Detector.
- Paste your text, or upload a Word/PDF file.
- Get an instant estimate of how AI-written it reads, with the most AI-like passages highlighted so you can revise them.
Check your text now — free, no sign-up.
Open the AI Content DetectorA word on accuracy
No detector — Copyleaks, GPTZero, or any other — is 100% accurate; they all work on probability and can flag clear, human writing. Use the score to review and improve your own work before you submit, not to accuse anyone.