OpenPlag Labs: Terms of Service and Privacy Policy
Last updated: 10 November 2026
This is a translation of the Hebrew text. If the two versions differ, the Hebrew version prevails.
Terms of Service
These terms take effect on the day they are published on the site.
1. Who we are and what this agreement covers
1.1. The site openplaglabs.com and the service it provides (the "Service") are operated under the name OpenPlag Labs ("we", "us").
1.2. These terms, together with the Privacy Policy below, are the entire agreement between you and us.
1.3. You accept these terms by ticking the consent box when you register and before every check. Without accepting them you cannot upload a document for checking.
2. What the Service does
2.1. The Service compares a document you upload with texts in the open databases it can access, and produces a report that marks similar passages (the "Similarity Report").
2.2. The Service also produces an experimental measure of writing patterns (the "Writing Indicator"), which estimates how closely the text resembles, statistically, writing that was delegated to an artificial intelligence tool.
2.3. The Service accepts PDF, Word and text files. The databases searched are listed in every report and may change from time to time.
3. Who may use the Service
3.1. Anyone aged 18 or over. Anyone under 18 may use the Service only with the consent of a parent or guardian, who also accepts these terms.
3.2. Anyone using the Service on behalf of an organisation declares that they are authorised to bind it.
4. User account
4.1. A check requires an account with a verified e-mail address. Each e-mail address is entitled to one free trial check.
4.2. You are responsible for keeping your password confidential, and for telling us at once about any use of your account that you did not authorise.
4.3. You may not open several accounts in order to obtain several trial checks. If you do, we may close the additional accounts.
5. Documents you upload
5.1. By uploading a document you grant us permission to process it for the purpose of running the check and producing the report.
5.2. You declare that you have the right to upload the document: that it is yours, that you have the author's permission, or that you have other authority to check it (for example as a lecturer, an editor or a representative of an institution). You bear responsibility for this.
5.3. Do not upload a document containing medical information, classified information, trade secrets or identifying details of other people, unless you have the right to do so.
6. What the report says, and what it does not say
6.1. The report does not determine that plagiarism occurred. It points to shared text and presents the evidence for review. Shared text may result from correct quotation, standard professional wording, earlier work by the same author, or a source that copied from your document rather than the other way round.
6.2. The report covers only the databases listed in it. Paywalled articles, books, theses that are not openly available, and most websites are not checked. Finding no matches is not a certificate of originality.
6.3. The Writing Indicator is an experimental statistical estimate. It measures resemblance to patterns, and does not identify who wrote the text. In our measurements it was wrong in about one case in four. Human writing may receive a high score, and writing assisted by a tool may receive a low one.
6.4. Neither the report nor the Writing Indicator may be relied on as the sole evidence for a decision that harms a person: a grade, a disciplinary procedure, the rejection of a paper, dismissal or public exposure. Such a decision requires review by a person, and a hearing for the author.
7. Permitted and prohibited use
7.1. You may use the Service to check your own work before submitting it, or a document you have authority to check.
7.2. You may not:
- publish a report on another person's document as an accusation, or in a way that presents that person as having committed plagiarism;
- upload content you have no right to process, or unlawful content;
- run automated programs against the Service, try to bypass usage limits, or interfere with the security of the server;
- sell the Service or its reports to others without written consent;
- copy passages of the sources from a report beyond what their licence allows.
7.3. If you breach this section, we may suspend or close your account, after a notice that gives you a chance to explain, unless the harm is serious and immediate.
8. Limitation of liability
8.1. The Service is provided as is. We do not undertake that every instance of copying will be found, that every match found is copying, or that the Writing Indicator will be correct in any particular case. A negative result in OpenPlag's AI check does not imply a similar result in checks by other tools: each tool follows its own checking philosophy, and results may differ between tools.
8.2. To the extent permitted by law, we are not liable for indirect or consequential damage caused by reliance on a report, including a grade, a disciplinary decision, the rejection of a paper, loss of income or harm to reputation.
8.3. To the extent permitted by law, our total liability to you, on any ground whatsoever, is limited to the amount you paid us in the 12 months before the event.
8.4. The limitations in this section do not apply to damage we caused intentionally or through gross negligence, nor to rights that the law provides cannot be waived, such as rights under the Consumer Protection Law and the Protection of Privacy Law.
9. Indemnity
9.1. You will indemnify us for damage and reasonable expenses, including legal fees, arising from a third-party claim that results from a document you uploaded without the right to do so, or from your use of a report in breach of sections 6 and 7.
9.2. We will notify you of such a claim promptly, and allow you to defend against it.
10. Third-party sources and attribution
10.1. The report shows short passages from the sources found, only in order to show the match. The rights in these passages belong to their owners, and each source is shown with its title, a link to it and its licence details where known.
10.2. Passages from Wikipedia are shown under the Creative Commons Attribution-ShareAlike 4.0 licence (CC BY-SA 4.0). Each passage is accompanied by a link to the article it was taken from (where its history of authors is recorded), the name of the licence with a link to it, and a note that the passage was shortened from the original.
10.3. The availability, accuracy and completeness of external databases are outside our control. A database that did not respond during a check is marked as such in the report.
11. Availability
11.1. We will try to keep the Service running continuously, but there may be interruptions for maintenance or because of faults. A check that failed for a reason on our side is not deducted from your balance of checks.
11.2. A check usually takes a few minutes, and longer at busy times. The duration of a check is not guaranteed.
12. Payment and packages
12.1. Prices appear on the pricing page, including VAT where applicable. You can buy a single check, or a monthly subscription of 5, 15 or 30 checks.
12.2. A single check that was bought is valid for three months from the date of purchase. If it is not used within that period, the right to use it expires automatically. Checks not used in a monthly subscription do not carry over to the next month.
12.3. Payment is made through an external payment processor. Your card details are given directly to the processor, and do not pass through us or get stored by us. An invoice is sent to your e-mail.
12.4. Launch period. Until further notice on the site, the Service operates in a launch period and is provided free of charge, with a daily allowance of checks for each user. During this period the Service continues to improve, and changes, interruptions and faults may occur. The limitation of liability in section 8 also applies to use during this period. The end of the launch period does not oblige you to buy anything, and reports produced during it are kept under the Privacy Policy.
13. Cancellation and refunds
13.1. A monthly subscription can be cancelled at any time, in your account area or by e-mail. The cancellation takes effect at the end of the current subscription month: until then the subscription continues and you can use the checks left in it, and after that no further charge is made. For example, a subscription that started on the 3rd of the month and was cancelled on the 10th stays active until the 3rd of the following month.
13.2. A subscription cancelled within 14 days of purchase: we will refund the payment for the current month, less the proportional part of the checks already used, and less a cancellation fee of 5% or ILS 100, whichever is lower.
13.3. A single check that was bought and not used can be cancelled within 14 days, less the cancellation fee in section 13.2. A check that has already been run is a service provided in full, and will not be refunded.
13.4. A check that failed for a reason on our side is returned to your balance, and if you ask, the payment for it is refunded.
13.5. Refunds are made within 14 days of receiving the cancellation notice, to the means of payment you used.
13.6. A person aged 65 or over, a person with a disability or a new immigrant may be entitled to a longer cancellation period under the law. Nothing in these terms detracts from any right given to a consumer by law.
14. Changes to the terms and the Service
14.1. We will notify you by e-mail of any material change to these terms at least 30 days in advance. Anyone who does not accept the change may cancel the subscription before the change takes effect.
14.2. We may change the list of databases, the checking methods and the design of the report. Every report states the engine version and the databases that were searched.
15. Closing an account
15.1. You can delete your account at any time. Deletion removes your reports and account details, except what must be kept under tax law (invoices).
15.2. If we stop providing the Service, we will give at least 30 days' notice. Active subscribers will be able to use the Service until the end of their current billing period. No refunds will be given because the Service has stopped.
16. Governing law and jurisdiction
16.1. These terms are governed by the law of the State of Israel. Jurisdiction lies with the competent courts in Israel, under the ordinary rules of jurisdiction.
16.2. Before turning to the courts, we would be glad if you contacted us first, and we will try to reply within 14 days.
17. Special cases
17.1. Special cases, which fall under no other section but should nonetheless be prepared for, are governed by Appendix Z.
18. Open access for AI agents
18.1. AI agents may run checks on behalf of their users without an account, through the addresses listed in llms.txt. Using open access constitutes acceptance of these terms, by whoever operates the agent and by the person on whose behalf the document is sent.
18.2. The agent must obtain the user's permission before sending a document. Responsibility for this, and for the right to send the document, lies with the user and the agent's operator, as in section 5.
18.3. Open access is limited: one check at a time per network address, waiting times that grow between checks, a limited number of checks a day, and documents of up to 10,000 words. Checks by registered users come first in the queue. We may change the limits, suspend or close open access at any time, and block use that appears abusive.
18.4. The report of an open check is available at a personal link for 24 hours and is then deleted. Anyone holding the link can view it.
18.5. Everything said in sections 6 and 8 about the meaning of the report and the limitation of liability applies to open checks as well.
19. Contact
Privacy and Confidentiality Policy
Your document is deleted as soon as the check is finished, and the report is deleted after 30 days. Our principle: we keep only what is needed to provide the Service, and only for as long as it is needed.
1. What we collect, why, and how long we keep it
| Information | Why | Kept for |
|---|---|---|
| E-mail address, name (if given), encrypted password | Account, verification, notices about checks | Until the account is deleted |
| The document you uploaded | The check itself | Deleted as soon as the check ends |
| The report (including the document's text as shown in it) | So that you can view and download it | 30 days, or until you delete it |
| Check record: date, file name, percentages | Check counter, handling complaints | Until the account is deleted |
| Purchase details and invoices (no card number) | Billing, bookkeeping | As required by tax law |
| IP address and server logs | Security and preventing misuse | 30 days |
| For open agent access (section 18): a one-way hash of the network address that changes every day, and the agent's name if it gives one | Enforcing the limits | Up to 7 days |
| Visit counts: day, page, language and the site you came from. No IP address, no cookies and nothing that identifies you | Knowing how many people come and from where | Aggregate numbers only, no time limit |
| Consent to receive updates and marketing messages, only if you ticked it at registration (with date and IP address) | Sending updates and marketing messages by e-mail | Until you withdraw consent or delete the account |
You are under no legal obligation to provide this information, but without an e-mail address and a document the Service cannot be provided.
2. What leaves our server during a check
The document itself is not sent to anyone. To find sources, only short search phrases from it are sent to the databases (up to 40 phrases of about 9 words each), and the entries in its reference list are sent to Crossref to check that they exist. Every phrase that was sent and every database that received it are listed in the report, under the "Coverage and transparency" tab. The databases are public third-party services, which operate under their own policies.
In addition, our server holds an index of numeric fingerprints of abstracts from the open OpenAlex database, and the document is checked against it on the server itself, without sending anything from it. For works found similar in the index, only the identifiers of those works are sent to OpenAlex, to obtain their details (title, authors and abstract). No text from the document is sent at this stage.
3. Providers that process information on our behalf
| Provider | Role |
|---|---|
| Contabo | Hosting of the server and backups, in the European Union |
| Cloudflare | Traffic routing and protection against attacks |
| The payment processor | Processing payments and issuing invoices |
| The e-mail provider | Sending verification e-mails and notices |
We do not sell information, we do not use third-party advertising or tracking cookies, and we do not pass documents to institutions or lecturers. Information will be given to the authorities only where the law requires it.
Our server and its backups are located in the European Union, and information is transferred to it in accordance with Israeli law on the transfer of information outside Israel. The Service's database is managed in accordance with the Protection of Privacy Law and the regulations under it.
4. Confidentiality
The document and the report are visible only to you. No member of the Service's staff reads documents or reports, unless you explicitly asked for help with a particular check, or it is needed to handle a security incident. In such a case the access is logged.
5. Security
Traffic is encrypted (HTTPS). Passwords are stored only in hashed form. Access to the server is restricted to a security key, and the server receives automatic security updates. No system is completely immune. In the event of a significant security incident we will notify the users affected, and the Privacy Protection Authority where the law requires it.
6. Your rights
You are entitled to see the information we hold about you, and to ask for it to be corrected or deleted, under the Protection of Privacy Law. Most of this you can do yourself in your account area (deleting a report, deleting your account). For any other request: support@openplaglabs.com. We will reply within 30 days.
You can withdraw consent to receive marketing messages at any time, through the unsubscribe link in every such message or by contacting us. Withdrawing does not affect your use of the Service.
7. Cookies
The site uses only the cookies needed for it to work: sign-in, security and language choice. There are no advertising cookies.
8. Changes
We will notify you by e-mail of any material change to this policy before it takes effect.