Terms of Use

Effective September 8, 2026 · Version 2026-09-08

These Terms govern Redline Studio, including its website, comparison service, downloadable application, previews, documentation and generated files (the “Service”). The Service is provided by Castleground LLC (“Castleground,” “we,” “us” or “our”). Contact: contact@castleground.co.

1. Agreement and eligibility

By checking the agreement box and using the Service, you affirmatively agree to these Terms. If you do not agree, do not upload documents or use the Service. You must be at least 18 years old and legally able to enter this agreement. If you act for a business or another person, you represent that you have authority to bind that party, and “you” includes that party. Do not use the Service where doing so is prohibited by applicable law.

Our Privacy Notice explains our data practices. Acknowledgment of that notice does not waive privacy rights or replace any separate consent required by law. These Terms do not override rights that applicable law makes nonwaivable.

2. Free review aid; no professional relationship

The Service is a free, automated document-review aid. It is not a lawyer, law firm, accountant, financial adviser, medical professional, fiduciary, expert witness or professional document-verification service. No attorney-client, fiduciary, advisory, agency or other professional relationship is created by using the Service or communicating with us. We do not provide legal or other professional advice, determine a document’s legal effect, certify a redline, or decide whether any change is material.

The Service is not affiliated with or endorsed by Litera, Microsoft, Adobe or any other document-software company unless we expressly say so in writing. Compatibility or a comparison to another product does not establish equivalent capabilities or accuracy.

3. You must independently verify every result

DO NOT RELY ON THE SERVICE AS THE SOLE OR FINAL CHECK OF A DOCUMENT. YOU ARE RESPONSIBLE FOR INDEPENDENTLY COMPARING THE ORIGINALS, VERIFYING EVERY MATERIAL CHANGE AND OMISSION, AND OBTAINING QUALIFIED REVIEW BEFORE SIGNING, SENDING, FILING, PUBLISHING OR OTHERWISE ACTING ON A DOCUMENT.

Keep the original files and appropriate backups. Confirm that you selected the correct versions in the correct order, chose appropriate comparison settings, and downloaded the intended results. Check names, dates, amounts, deadlines, defined terms, numbers, punctuation, references, tables, formulas, images, signatures, footnotes, headers, attachments, page numbers and formatting. Do not assume an unchanged-looking passage was completely compared.

The Service can miss changes, mark unchanged content as changed, misclassify moved text, misread scanned text, alter layout or pagination, substitute unavailable fonts, omit unsupported objects, or produce incomplete or corrupt files. PDF reading order may differ from visual order. OCR confidence scores do not guarantee correctness. “No changes,” “complete,” “ready,” a page count, a confidence score or a successful download is a processing status, not an assurance of accuracy, completeness, legal suitability or visual identity.

Settings may deliberately ignore categories of differences. Changed-pages-only files are review extracts, not complete documents. A changed-pages-only Word file may contain page images instead of editable text or native revisions. The full DOCX must be used if you need editable tracked changes. Changes spanning pages, repeated headers, fields, complex tables or unsupported objects may be difficult or impossible to isolate. Always consult the full output and the originals.

You remain responsible for all decisions, professional duties, confidentiality obligations, court or filing requirements, limitation periods and deadlines. Do not use the Service as a safety-critical system, emergency resource, records archive, backup provider, or sole control for decisions that could cause injury or substantial harm.

4. Your documents and processing permission

You retain whatever rights you have in documents you submit. We do not claim ownership of your document content. You grant Castleground and the hosting and infrastructure providers we use a limited, nonexclusive permission to receive, temporarily store, copy, parse, render, compare and transmit your documents and results solely to operate, secure and deliver the Service, comply with law and address a specific abuse or security incident. This permission does not authorize us to sell your documents, publish them for others, or use their contents to train an AI model.

You represent that you have all necessary rights, permissions and legal grounds to submit the documents and have them processed. Do not upload documents in breach of a confidentiality agreement, professional duty, court order, employment policy, privacy law, trade-secret obligation, export restriction or another person’s rights. The free public Service is not offered under a negotiated confidentiality agreement, business-associate agreement, legal-services engagement, regulated-records agreement or customer-specific data-processing agreement. Do not upload information requiring such an arrangement unless we have separately signed it.

Website comparisons upload files to the comparison server and involve service providers described in the Privacy Notice. An uploaded document’s confidentiality or privileged status is not guaranteed by these Terms. You must decide whether an online service is appropriate for that document. The desktop version can process locally, as described in the application, but you remain responsible for the security of your own device and any subsequent sharing.

5. Availability, retention and limits

We may impose file-size, page-count, rate, resource and concurrency limits; refuse or interrupt jobs; suspend access; modify features; or discontinue the free Service. We do not promise uninterrupted availability, continued support, compatibility, response times, preservation of a particular version, or that we will correct any defect.

Temporary uploads and results are subject to the retention periods and operational limits stated in the Privacy Notice and application. Download needed results promptly. We do not undertake to preserve files, recover expired jobs, maintain a backup for you, or notify you individually before routine deletion. Lawful retention, a documented security incident, infrastructure behavior or your own local copies may affect deletion as described in the Privacy Notice. Do not submit your only copy of a document.

6. Acceptable use

Do not use the Service to violate law or another person’s rights; distribute malware; exploit vulnerabilities; probe or attack infrastructure without permission; evade access restrictions or rate limits; access another user’s files or session; submit misleading identity or rights information; or interfere with others’ use. Do not use automated submissions or bulk processing that exceed published limits or degrade the free Service. Do not remove legally required third-party notices. Report suspected unauthorized access or vulnerabilities to contact@castleground.co without accessing, changing or distributing other users’ data.

We may investigate suspected abuse, preserve relevant information when legally appropriate, restrict offending access and cooperate with lawful requests. This does not create a duty to monitor all content or prevent every harmful use.

7. Software and third-party components

Except for your documents and rights granted under applicable third-party or open-source licenses, Castleground and its licensors retain rights in the Service, its original code, branding and materials. We grant you a limited, nonexclusive, revocable permission to use the Service for its intended purpose in accordance with these Terms. No trademark license is granted. Applicable open-source licenses continue to govern their respective components and take precedence over conflicting restrictions in these Terms for those components. Generated results may contain your content and third-party material; we do not warrant that you have rights to every element.

External websites, software, hosting platforms and document viewers operate under their own terms. We do not control their independent actions. Your choice of a viewer can change the display of native tracked changes, including colors and pagination.

8. Disclaimer of warranties

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE SERVICE AND ALL OUTPUTS ARE PROVIDED “AS IS” AND “AS AVAILABLE,” WITH ALL FAULTS AND WITHOUT WARRANTIES OF ANY KIND, WHETHER EXPRESS, IMPLIED OR STATUTORY. CASTLEGROUND DISCLAIMS WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, NON-INFRINGEMENT, ACCURACY, COMPLETENESS, RELIABILITY, SECURITY, AVAILABILITY AND FREEDOM FROM ERRORS, MALWARE OR DATA LOSS, INCLUDING WARRANTIES ARISING FROM COURSE OF DEALING OR USAGE OF TRADE.

We do not warrant that a comparison will detect every change, retain every feature, preserve exact formatting, satisfy a legal or professional standard, meet your requirements or produce an outcome equivalent to another product. Statements in support messages, examples or documentation do not create a separate warranty unless an authorized Castleground representative expressly agrees to one in a signed writing. Mandatory statutory warranties and remedies remain in effect where they cannot lawfully be excluded.

9. Allocation of risk and limitation of liability

TO THE MAXIMUM EXTENT PERMITTED BY LAW, CASTLEGROUND AND ITS MEMBERS, MANAGERS, OFFICERS, EMPLOYEES, CONTRACTORS AND LICENSORS WILL NOT BE LIABLE FOR INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, EXEMPLARY OR PUNITIVE DAMAGES, OR FOR LOST PROFITS, REVENUE, BUSINESS, OPPORTUNITIES, GOODWILL, DATA OR ANTICIPATED SAVINGS, ARISING OUT OF OR RELATING TO THE SERVICE, ITS UNAVAILABILITY, YOUR DOCUMENTS, ANY COMPARISON ERROR OR OMISSION, OR YOUR USE OF OR RELIANCE ON AN OUTPUT, EVEN IF ADVISED THAT SUCH LOSS WAS POSSIBLE.

TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE TOTAL AGGREGATE LIABILITY OF CASTLEGROUND AND THOSE PERSONS FOR ALL CLAIMS ARISING OUT OF OR RELATING TO THE SERVICE OR THESE TERMS WILL NOT EXCEED US $100. THESE LIMITATIONS APPLY REGARDLESS OF THE LEGAL THEORY, INCLUDING CONTRACT, TORT, ORDINARY NEGLIGENCE, STRICT LIABILITY OR OTHERWISE, AND TO CLAIMS ARISING FROM COMPARISON, RENDERING, OCR, STORAGE, TRANSMISSION OR DOWNLOAD ERRORS.

These provisions expressly allocate the risk of ordinary negligence to the extent New York law or other applicable law permits that allocation. They reflect that the Service is offered without charge, has known technical limitations and requires independent verification. They do not eliminate your obligation to prove causation, recoverable loss and any other elements of a claim, and do not create liability where none otherwise exists.

NOTHING IN THESE TERMS EXCLUDES OR LIMITS LIABILITY FOR FRAUD, WILLFUL MISCONDUCT, GROSS NEGLIGENCE, OR ANY OTHER LIABILITY THAT APPLICABLE LAW DOES NOT PERMIT TO BE EXCLUDED OR LIMITED. Nonwaivable consumer, privacy and other statutory rights remain unaffected. A court may find a limitation unenforceable in a particular situation; no term is intended to prevent a legally protected claim or remedy.

10. Indemnification for your unlawful use

To the extent permitted by law, you agree to indemnify and hold Castleground and its members, managers, officers and employees harmless from third-party claims, damages, judgments and reasonable legal costs resulting from your knowing violation of these Terms, your unlawful or unauthorized submission or use of documents, or your infringement of another person’s rights. This obligation does not apply to the extent a claim results from Castleground’s breach of these Terms, negligence or misconduct, or where indemnification is prohibited by law.

We will give reasonably prompt notice of a covered claim and reasonable cooperation at your expense. No settlement may admit fault by us, impose a nonmonetary obligation on us or fail to release us without our written consent. We may participate with our own counsel at our own expense. Nothing requires a consumer to indemnify us for our own unlawful conduct.

11. Governing law and disputes

These Terms and disputes relating to the Service are governed by New York law, without applying its conflict-of-law rules, except where controlling law requires otherwise. Where enforceable, the state and federal courts located in New York, New York have exclusive jurisdiction, and you and Castleground consent to personal jurisdiction and venue there. A consumer retains any mandatory right to sue in another court or rely on protective laws of the place where the consumer resides.

Before commencing a claim, please send a written description and requested resolution to contact@castleground.co so that we can attempt to resolve it informally for 30 days. This request does not prevent seeking urgent injunctive relief, reporting to a regulator, filing in small claims court where available, or filing before a legal deadline. It is not an agreement to suspend a limitation period unless the parties separately agree in writing.

TO THE EXTENT PERMITTED BY LAW, EACH PARTY KNOWINGLY AND VOLUNTARILY WAIVES A JURY TRIAL IN A DISPUTE ARISING FROM THE SERVICE OR THESE TERMS. If this waiver is unenforceable for a claim, it does not affect the remaining terms or impose arbitration. These Terms do not contain a mandatory arbitration agreement.

Where a contractual limitation period is lawful, a claim relating to the Service must be brought within one year after it accrues. This does not shorten a period that applicable law prohibits the parties from shortening, apply to nonwaivable statutory remedies, or override the exceptions in Section 9.

12. Suspension, changes and termination

You may stop using the Service at any time. We may suspend or end access for a violation, security concern, legal requirement, resource limitation or discontinuation of the free Service. Termination does not extinguish rights that accrued before termination, nonwaivable rights or obligations intended to survive, including the verification duties, lawful disclaimers and limitations, indemnification and dispute provisions.

We may revise these Terms prospectively by publishing an updated version and effective date. Material changes require renewed affirmative acceptance before a subsequent upload. A later version does not retroactively change the terms governing a completed use or an existing dispute without legally effective agreement. Keep a copy of the version you accept.

13. General provisions and contact

These Terms, together with any expressly incorporated terms and a separately signed agreement if applicable, form the agreement concerning the Service. A separately signed agreement controls where it expressly conflicts. If a provision is unenforceable, it is severed or limited only to the extent the law permits, and the remainder continues in effect. A failure to enforce a term is not a waiver. You may not transfer your obligations to evade these Terms. Castleground may assign this agreement in a merger, reorganization or transfer of the Service, subject to applicable law and your nonwaivable rights.

Except for the persons expressly protected by Sections 9 and 10 and as required by law, this agreement does not create third-party beneficiary rights. Electronic notices may be sent through the Service or by email where legally appropriate; email contact is not consent to service of legal process in a manner otherwise prohibited by law.

Questions, complaints, legal notices and requests concerning these Terms may be sent to Castleground LLC at contact@castleground.co.