EssayCheck vs Originality.AI

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

Originality.AI

The detector to pick if you are a publisher or agency policing freelance output at volume, because the team history and writing replay matter more than the raw score. A free Basic tier (three AI-only scans a day, 2,000 words each) now lets you test it before paying. Do not use it to accuse a student; no detector is accurate enough to carry that weight.

Pros

• +Credit model is legible: 100 words per credit, no hidden weighting
• +API on the higher tier makes batch pipelines possible
• +Chrome extension works inside Google Docs, where the writing actually happens
• +Writing replay from revision history is process evidence, not just a score
• +Free Basic tier allows three AI-only scans a day with file upload, no subscription needed

Cons

• −Monthly subscription credits expire, so a light month is wasted spend
• −The jump from $14.95 to $179 a month is a steep single step
• −False positives on heavily edited or non-native English writing are a documented hazard across every detector
• −Accuracy benchmarks are largely vendor-run

Is EssayCheck cheaper than Originality.AI?

EssayCheck is free to use; Originality.AI starts at $14.95/mo.

Does EssayCheck or Originality.AI have a free tier?

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

Which has a public API, EssayCheck or Originality.AI?

Originality.AI 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.