ZeroGPT is the tool people reach for first: paste text, get a percentage, free. It answers a casual question casually. Humanums exists for when the answer actually matters — when a grade, a contract, or a byline depends on whether someone believes you wrote it. That requires evidence, not an estimate.
ZeroGPT is a free web-based AI detector that returns a percentage estimate for pasted text. Humanums is a certification platform that records writing behavior and issues a signed certificate with a public verification page. ZeroGPT's score changes between runs and cannot be verified by anyone else; a Humanums certificate is fixed, signed, and publicly inspectable.
ZeroGPT answers 'does this text look AI-generated?' with a guess. Humanums answers 'was this written by a human?' with a record.
A ZeroGPT percentage is not stable — rephrasing, trimming, or rerunning shifts it. A certificate is bound to a content hash and never changes.
Free tools are fine for curiosity. When someone's decision depends on the answer, the standard of evidence has to go up.
| ZeroGPT | Humanums | |
|---|---|---|
| Price | Free (with paid tiers) | Free tier; paid plans for volume |
| Input | Pasted finished text | The writing session itself |
| Output | AI-probability percentage | Signed certificate + badge + verification page |
| Repeatability | Scores vary between runs and edits | Certificate is fixed and hash-bound |
| Third-party verifiable | No — a screenshot of a score proves nothing | Yes — public verification page |
| Best for | Quick curiosity checks | Stakes: grades, contracts, bylines |
ZeroGPT is one of the most-searched free AI detectors. You paste text into a box and it returns a percentage estimating how much of it was AI-generated, with highlighted sentences. The accessibility is the appeal: no account, no cost, instant answer.
For low-stakes curiosity — wondering whether a paragraph someone sent you reads as generated — that is a perfectly reasonable tool.
The problem starts when a free score is treated as evidence. Detector outputs vary with text length, language, and edits; the same essay can score differently on different days. Research has consistently documented elevated false positive rates for non-native English writers.
There is also a verification gap: if you screenshot a 2% AI score to defend your work, the person you show it to has no way to confirm you didn't cherry-pick, rerun, or edit until the number cooperated. The score has no provenance.
Humanums skips text analysis entirely. It records behavioral signals while you write — keystroke cadence, pauses, revisions, paste events, session timing — and converts them into a signed certificate bound to a hash of the finished content.
The result has provenance by construction. The verification page is public, the signature is server-held, and the content hash means the certificate covers exactly one version of one document. Nobody has to trust your screenshot.
Checking text someone sent you, out of curiosity? ZeroGPT is free and fast, and the answer doesn't need to hold up to scrutiny.
Defending your own work — to a professor, a client, an editor, or a reader? You need evidence that exists independently of any detector's mood. That is what certification is for.
ZeroGPT's results vary between runs and across text types, and like all detectors it produces false positives — especially for non-native English speakers. It is a probability estimate from finished text, which is a fundamentally limited input.
Not meaningfully. The score is not reproducible, not signed, and not verifiable by a third party. A Humanums certificate exists precisely because detector screenshots don't hold up when it matters.
Humanums has a free tier with 3 certifications per month, including the full verification page and badge. Paid plans add unlimited certifications and publisher features.
Certify your next piece free and share a verification link instead of a detector screenshot.