Free AI detector terms: plain English, binding law.

1. Acceptance of Terms & binding agreement formation

These Terms & Conditions (“Terms”) constitute a legally binding agreement between you (“you”, “your”, or “User”) andCeptile (ceptile.com), the creator and operator of AI Detector by Ceptile at aidetector.ceptile.com (“we”, “us”, “our”, or the “Service”).

By accessing, browsing, evaluating files, exporting reports, or interacting with any portion of the Service, you signify that you have read, understood, and agreed to be bound by these Terms and our Privacy Policy, which is incorporated herein by reference. If you do not agree to all provisions of these Terms, you are not authorized to use the Service and must immediately cease access.

If you are accessing the Service on behalf of an academic institution, corporation, non-profit organization, or other legal entity, you represent and warrant that you possess the full legal authority to bind that entity to these Terms.

2. Description of the Service (free, on-device, zero-backend)

AI Detector by Ceptile is a browser-based, client-side statistical diagnostic instrument designed to evaluate whether text, images, video, or audio exhibit structural fingerprints characteristic of generative artificial intelligence models.

The Service computes statistical metrics (including 46 text signal extractors, Perplexity approximations, Zipf distributional divergence, MATTR lexical diversity, burstiness, image CFA residuals, Error Level Analysis, video frame noise coherence, and audio spectral cutoffs) locally inside your browser runtime. The Service operates without a server-side machine learning backend, without user accounts, without credit balances, and without subscription paywalls. Because nothing is sold on the Service, these Terms contain no billing, payment, or subscription cancellation provisions.

3. Eligibility & minimum age standards

The Service is intended for a general audience. You must be at least 13 years of age (or the age of majority in your jurisdiction) to use the Service independently. Minors between the ages of 13 and the legal age of majority may access the Service only under the active supervision of a parent, legal guardian, or authorized educator who agrees to be bound by these Terms.

If you are an educator introducing this tool to a classroom setting, you agree to supervise student interactions and ensure that no student transmits personal or sensitive information via our email support channels.

4. License grant & permitted scope of use

Subject to your complete and ongoing compliance with these Terms, Ceptile grants you a personal, non-exclusive, non-transferable, revocable, worldwide license to access and use the Service for lawful personal, educational, editorial, academic research, and non-commercial professional verification purposes.

You are expressly authorized to:

• Evaluate your own original writings, manuscripts, and creative media.
• Evaluate submissions, student papers, or articles that you possess lawful authority, copyright license, or institutional prerogative to review.
• Export, print, and distribute local diagnostic reports (PDF, JSON, Markdown, CSV) generated by the Service.
• Inspect client-side JavaScript source code in your browser’s developer tools to verify mathematical calculations, algorithm transparency, and zero-upload claims.

5. Acceptable Use Policy (AUP) & prohibited conduct

You agree not to engage in any of the following prohibited activities:

• Automated Scraping & Infrastructure Flooding: Using bots, crawlers, automated scripts, or flood requests that burden edge infrastructure, degrade availability, or circumvent CDN rate controls.
• Competitive Reverse-Engineering & Model Ingestion: Bulk-harvesting our signal coefficients, mathematical weights, calibration benchmarks, or lexicon tables to train competing commercial detection classifiers or AI evasion tools.
• Deceptive Commercial Rebranding: Framing, mirroring, white-labeling, or repackaging the Service’s interface, reports, or algorithm under another trade name without prior written authorization from Ceptile.
• Malicious Code Injection: Introducing viruses, trojans, worms, logic bombs, or other technologically harmful payloads into client memory or network edge endpoints.
• Harassment & Defamation: Utilizing detection outputs or email support channels to harass, defame, bully, or intimidate any writer, student, employee, or colleague.
• Infringing Submissions: Uploading or evaluating confidential corporate materials, trade secrets, or copyrighted content in violation of third-party non-disclosure agreements or legal rights.
• Sole-Basis Adverse Action: Violating Section 8 by taking adverse punitive action against an individual based solely on an automated detection score.

6. Ownership of user content & zero content license

You retain 100% ownership and copyright over all text, images, video, and audio you submit to the Service.

Because all diagnostic algorithms execute in-memory on your local device and are never transmitted to our servers, you grant Ceptile zero license, zero rights, and zero ownership in your content. We do not claim any implied license to view, host, store, copy, modify, distribute, or create derivative works from your submitted work.

Practical Consequence: Ceptile maintains no centralized repository or archive of your past analyses. If you need to preserve evidence of an analysis, you are solely responsible for exporting and saving the generated JSON, PDF, or Markdown report to your local disk.

7. Ceptile intellectual property & proprietary rights

Except for your submitted content, the Service — including its source code, algorithm weighting pipelines, signal taxonomy, statistical fusion models, visual design, user interface components, documentation, brand assets, and logos — is the exclusive intellectual property of Ceptile and is protected by international copyright, trademark, and unfair competition laws.

The marks “Ceptile”, “AI Detector by Ceptile”, and associated logos are proprietary trademarks of Ceptile. Third-party trademarks referenced on the Service (including GPTZero, Turnitin, Copyleaks, Originality.ai, ZeroGPT, and QuillBot) are cited solely for nominative, comparative, and factual identification purposes. Such citations do not imply affiliation, sponsorship, endorsement, or approval by their respective owners.

8. Critical legal disclaimer: probabilistic evidence & human oversight

AI detection is probabilistic statistical inference, not deterministic empirical proof.

Our cross-validated benchmark evaluation (AUC 0.966, 90.5% accuracy at the 60% threshold, 6.2% false-positive rate on a 2,743-document corpus) demonstrates that while high scores strongly correlate with synthetic text fingerprints, statistical overlap with human writing exists. Elevated false-positive risks naturally occur in:

• Writers utilizing formal, standardized academic or technical prose.
• Non-native English writers (ESL) who employ conventional, predictable lexical phrasing.
• Inputs under 150 words, where statistical sample sizes produce wide confidence intervals.
• Writers utilizing assistive technologies, grammar linters, or predictive keyboards.

MANDATORY HUMAN-IN-THE-LOOP REQUIREMENT:In alignment with modern academic integrity and legal standards (e.g., Copyleaks and Turnitin contractual caveats), you expressly agree that you will NEVER rely upon a detection score, signal table, or highlight map as the sole or primary basis for any adverse decision affecting an individual.This includes, but is not limited to:

• Initiating academic disciplinary proceedings, issuing failing grades, or recommending student expulsion.
• Terminating employment, denying job applications, or refusing promotions.
• Denying admissions, scholarships, loans, mortgages, housing, or insurance coverage.
• Restricting digital accounts or bringing legal, regulatory, or administrative actions.

A detection score is a diagnostic lead intended to initiate an open, constructive conversation with the creator. If you take adverse action against an individual based solely on an automated score, you do so entirely at your own legal peril and assume all liabilities arising therefrom.

9. No warranty disclaimer ("as-is" & "as-available")

TO THE MAXIMUM EXTENT PERMITTED UNDER APPLICABLE LAW, THE SERVICE, DOCUMENTATION, REPORTS, AND DETECTION SCORES ARE PROVIDED ON AN “AS-IS” AND “AS-AVAILABLE” BASIS, WITH ALL FAULTS AND WITHOUT WARRANTY OF ANY KIND.

CEPTILE AND ITS FOUNDERS, EMPLOYEES, AFFILIATES, AGENTS, AND LICENSORS EXPRESSLY DISCLAIM ALL WARRANTIES, WHETHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, QUIET ENJOYMENT, ACCURACY, AND NON-INFRINGEMENT.

WE DO NOT WARRANT THAT:

• THE SERVICE WILL MEET YOUR OPERATIONAL REQUIREMENTS OR ACHIEVE ANY SPECIFIC OUTCOME.
• THE SERVICE WILL BE UNINTERRUPTED, TIMELY, SECURE, ACCURATE, OR ERROR-FREE.
• ANY DETECTION SCORE, CLASSIFICATION, SIGNAL ESTIMATION, OR EXPORTED ARTIFACT WILL BE 100% ACCURATE OR RELIABLE.
• DEFECTS IN SOFTWARE, SCRIPTS, OR ALGORITHMIC WEIGHTS WILL BE CORRECTED IMMEDIATELY.

10. Limitation of liability & $0 liability cap

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL CEPTILE, ITS CREATOR (SHAURYA AGARWAL), ITS AFFILIATES, DIRECTORS, EMPLOYEES, OR AGENTS BE LIABLE TO YOU OR ANY THIRD PARTY FOR ANY INDIRECT, CONSEQUENTIAL, EXEMPLARY, INCIDENTAL, SPECIAL, OR PUNITIVE DAMAGES — INCLUDING LOST PROFITS, LOST DATA, LOST REVENUE, REPUTATIONAL DAMAGE, LOSS OF GOODWILL, OR EXPENSES INCURRED DEFENDING ACADEMIC OR EMPLOYMENT PROCEEDINGS — ARISING FROM OR RELATING TO YOUR USE OF, OR INABILITY TO USE, THE SERVICE, EVEN IF CEPTILE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

BECAUSE THE SERVICE IS PROVIDED 100% FREE OF CHARGE WITHOUT SUBSCRIPTION OR USAGE FEES, OUR TOTAL AGGREGATE LIABILITY ARISING OUT OF OR IN CONNECTION WITH THESE TERMS OR THE SERVICE SHALL NOT EXCEED ZERO UNITED STATES DOLLARS ($0.00 USD).

THIS ALLOCATION OF RISK AND CAP ON DAMAGES IS AN ESSENTIAL BASIS OF THE BARGAIN: A COMPLETELY FREE, OPEN SOFTWARE PUBLICATION CANNOT UNDERWRITE OR INSURE HIGH-STAKES INSTITUTIONAL DECISIONS MADE CONTRARY TO ITS EXPLICIT WARNINGS.

11. User indemnification

You agree to defend, indemnify, and hold harmless Ceptile, its founder (Shaurya Agarwal), and its affiliates from and against any and all claims, liabilities, damages, losses, costs, and expenses (including reasonable attorneys' fees and legal costs) arising out of or in any way connected with:

• Your access to, use of, or misuse of the Service or its generated reports.
• Your violation of any provision of these Terms or applicable local, state, national, or international laws.
• Your violation of any third-party rights, including intellectual property, privacy, or publicity rights.
• Any adverse academic, employment, or contractual action taken by you against any individual based upon a detection score produced by the Service.

12. Service availability, fair use & modification rights

While we strive for 100% uptime, offline resiliency, and rapid loading, we do not guarantee continuous, uninterrupted availability. Ceptile reserves the right to modify, update, pause, or permanently discontinue the Service (or any portion thereof) at any time without notice.

To protect infrastructure from automated abuse and ensure equitable access, we reserve the right to deploy technical rate limits, edge bot challenges, or fair-use throttling at the CDN layer. Changes to our algorithmic weights or detection pipelines are versioned in public engine releases (2026.2) and documented transparently on How it works.

13. Termination, access restrictions & survival

These Terms remain in full force and effect during your usage of the Service. Because we maintain no user accounts, enforcement of these Terms occurs through edge IP blocking, CDN throttling, or network firewalls in the event of documented abuse or legal violations.

All sections that by their nature should survive termination — including Section 6 (Content Ownership), Section 7 (Ceptile IP), Section 8 (Legal Disclaimer & Human Oversight), Section 9 (No Warranty), Section 10 (Liability Cap), Section 11 (Indemnification), and Section 16 (Governing Law) — shall survive any termination of your access.

14. Third-party links, competitor comparisons & non-affiliation

The Service contains hyperlinks to third-party websites, academic research papers, open-access datasets, and competitor platforms (e.g., GPTZero, Turnitin, Copyleaks, Originality.ai). These links and comparison matrices are provided strictly as informational conveniences. Ceptile does not control, endorse, sponsor, or assume legal responsibility for the content, privacy policies, or terms of third-party platforms.

15. Relationship to Privacy Policy & independent verification

Our Privacy Policy governs how data is handled across the Service. By agreeing to these Terms, you acknowledge and agree that you have read and understood our Privacy Policy. You are encouraged to independently audit our client-side bundle and verify in your browser developer tools that analysis content is never transmitted across the network.

16. Governing law, dispute resolution & informal negotiation

Informal Resolution First: In the event of any controversy, claim, or dispute arising out of or relating to these Terms or the Service, you agree to contact us first at hello@ceptile.com and engage in good-faith informal negotiations for at least 30 calendar days before initiating formal legal proceedings.

Governing Law: The Service is published globally across the World Wide Web. To the maximum extent permitted by applicable law, these Terms shall be construed and governed in accordance with general contract principles and applicable laws, without regard to conflict of law principles. Nothing in these Terms restricts non-waivable statutory rights granted to consumers under mandatory local consumer protection statutes.

17. Severability, entire agreement & non-waiver

Entire Agreement: These Terms, together with our Privacy Policy, constitute the complete and exclusive legal agreement between you and Ceptile concerning the Service, superseding all prior oral or written agreements.

Severability: If any provision of these Terms is determined by a court of competent jurisdiction to be unlawful, void, or unenforceable, that provision shall be enforced to the maximum extent permissible, and the remaining provisions shall continue in full force and effect.

No Waiver: The failure of Ceptile to exercise or enforce any right or provision of these Terms shall not constitute a waiver of such right or provision.

18. Revisions to Terms & formal legal contact

We reserve the right to revise or update these Terms at any time to reflect software changes, security updates, or statutory developments. Revisions will be posted directly to this URL with an updated effective date. Your continued use of the Service after any revision constitutes your binding acceptance of the updated Terms.

For legal inquiries, copyright notices, or formal communications regarding these Terms:

Operating Entity: Ceptile (ceptile.com)
Creator & Founder: Shaurya Agarwal
Legal & General Inbox: hello@ceptile.com
Security Inbox: security@ceptile.com
Website: aidetector.ceptile.com