AI detector alternatives

People switch detectors for four reasons: they cannot get access, the free plan runs out, the tool flags real writing, or the report explains too little. Each page sorts the replacements by those reasons.

Access is the most common reason. Turnitin is sold to institutions, so a student, a freelance editor or a small school without a licence needs something they can buy. The second is the free plan running out: GPTZero, for example, lists 10,000 free words a month. The third is a false alarm on real writing that nobody can explain, which is when a second reading from a different model matters most.

Every replacement here is scored on the same 180-sample protocol as the tool it replaces, with false alarms on human writing counted as a number out of 100 and the date each price was checked. Each alternatives page names one top pick and then sorts the rest by reason, so you can go straight to the tool that fixes your problem.

If you already know the two tools you are choosing between, the head-to-head comparisons set them side by side over one essay. If you are choosing for a job rather than replacing a tool, start with the picks by job, and for the method behind every number read how we test.

When a pick on an alternatives page changes, the page names the run that moved it and the change is logged on the corrections page with the evidence.

A replacement is only worth switching to if it does better on the problem you have. Each alternatives page therefore shows the false alarm count, the detection count on raw and edited AI text, and the free plan side by side for every tool it lists, all from one run, so the trade you are making is visible before you sign up for anything. Prices carry the date we checked them.

Run RUN-2026-11-A started on 9 November 2026 and is in progress: GPTZero and Originality.ai are scored on the first 120 samples, and every other tool shows a test in progress tag until its readings are in.

How we testTest runs and raw files