ZeroCopi ZeroCopi

Originality checking

Find the sentences
that are not yours.

Paste a draft. ZeroCopi breaks it into phrases, searches every one against the live web, and hands the document back marked up — matched passages highlighted, each traced to where it already exists.

Check a document free See plans

4 free credits on signup. No card.

chapter-two.docx 31% matched

The transition to renewable infrastructure is rarely limited by engineering. Grid operators consistently identify permitting delays as the single largest obstacle to deployment at national scale, a pattern visible across four continents.

Storage costs have fallen by roughly ninety percent over the past decade, which reframes the question entirely.

  1. 1 iea.org
  2. 2 nature.com

How a check runs

  1. 01

    Split into phrases

    Your text is cut into nine-word passages — short enough to be specific, long enough that a match means something.

  2. 02

    Search each one

    Every phrase is queried as an exact string against the live web index, not a stale cached copy.

  3. 03

    Mark up the draft

    Passages that already exist somewhere come back highlighted in place, numbered to the pages they were found on.

What the score actually means

We ran ZeroCopi on two documents to calibrate it. Here is what came back.

3.3%

An unpublished draft

Written for the test, never posted anywhere. One phrase matched — a turn of phrase common enough to appear on three unrelated sites. Flagged as weak, not as copying.

75.6%

A published article

Pasted straight from a live industry publication. Twenty-three passages confirmed word for word against their sources.

Original work lands near zero, copied work lands high, and the gap between them is the whole point. Every match is labelled solid or weak so you can tell coincidence from copying.

For students

Writing a thesis takes a year.
Your credits should last one too.

Monthly plans suit people publishing every week. A dissertation is not that. Pay once, then check each chapter as you finish it — introduction in October, methodology in January, conclusion in May.

  • 150 credits, good for 37,500 words
  • Valid a full 12 months from purchase
  • No subscription, no renewal, nothing to cancel

$29.00once

150 credits · 12 months

Get the Student Pass

Try it free first — 4 credits on signup, no card.

What it reads

  • Public web pages, news, and blogs
  • Open-access journals and repositories
  • Indexed PDFs and documentation
  • Anything a search engine can reach

What it cannot

  • Private university submission archives
  • Paywalled journal full text
  • Unpublished documents

We list the limits because a checker that overstates its reach costs you a refund later. If your work is being graded through a university system, treat ZeroCopi as a pre-submission check, not a replacement for it.

Monthly plans

One credit covers 250 words. Plan credits refresh every month.

Writer

$10.00/month

100 credits a month · 25,000 words

For freelancers publishing every week.

Get Writer
Most used

Pro

$19.00/month

300 credits a month · 75,000 words

For editors reviewing a steady stream of drafts.

Get Pro

Agency

$49.00/month

1000 credits a month · 250,000 words

For teams vetting outsourced content at volume.

Get Agency

Prices shown in USD and adjusted for your region. Full details on the plans page.