EssayCheck vs GPTZero

EssayCheck

Worth a paste before you hand in an essay: three readings in one screen, free, with no signup, and the per-sentence flags are more useful than a bare percentage. Do not treat it as an integrity tool, though. The site itself says detectors disagree with each other, the same page offers a humaniser to rewrite flagged text, and the plagiarism scan that justified the earlier paid plans has disappeared.

Pros

• +Completely free with no account, card or expiring trial
• +AI score, rubric grade and grammar check come back from one paste
• +Per-sentence flagging shows what tripped the detector instead of a single number
• +Handles up to 4,000 words in one pass

Cons

• −Humaniser and editor sit next to the detector, undermining it as evidence of anything
• −No plagiarism scan any more, and no history without an account
• −No named operating company in the terms since the August 2026 rewrite
• −No API, LMS integration or bulk upload for teachers

GPTZero

One of the detectors schools most often adopt, and the sentence-level highlighting is what makes a result usable in a conversation with a student rather than a bare percentage. No detector is evidence of authorship, though, and the cheap Essential tier is gone from the pricing page, so paid use now starts at Premium.

Pros

• +Sentence-level highlighting shows what drove the score instead of a bare percentage
• +Batch uploads and a developer API make it usable inside an existing review workflow
• +Free tier is generous enough to evaluate properly before paying

Cons

• −The Essential tier has been dropped, so the cheapest paid plan is Premium at $12.99 a month on annual billing or $23.99 month to month
• −The developer API is priced separately from the writing plans, starting at $45 a month
• −Word-metered quotas punish long documents disproportionately
• −Detection accuracy remains contested and the tool cannot prove authorship

Is EssayCheck cheaper than GPTZero?

EssayCheck is free to use; GPTZero starts at $12.99/mo.

Does EssayCheck or GPTZero have a free tier?

Both: EssayCheck is free to use, and GPTZero has a free tier.

Which has a public API, EssayCheck or GPTZero?

GPTZero ships a public API, as of our last verification. A public API for EssayCheck is not confirmed by us — check its developer docs before you plan an integration.