WWelcome to the Sinai AI Platform (the "Platform"), an AI-powered digital reading and listening service operated by Sinai.ai Inc. ("Sinai," "we," "us," or "our"). The Platform lets you access books and other literary works in digital and audio formats, along with AI-enhanced features such as an interactive reading assistant, AI-narrated audiobooks, and translations.
These Terms of Service (these "Terms") are a binding agreement between you and Sinai.ai Inc., a [Delaware] corporation with its principal place of business at 1007 N Orange St. 4th Floor , 3395, Wilmington, DE 19801, New Castle, US. By clicking "I agree" (or a similar button or checkbox) when you create an account, or by accessing or using the Platform, you agree to these Terms. If you do not agree, do not create an account or use the Platform.
PLEASE READ SECTION 18 (GOVERNING LAW; DISPUTE RESOLUTION; ARBITRATION) CAREFULLY. IT REQUIRES THAT MOST DISPUTES BETWEEN YOU AND SINAI BE RESOLVED THROUGH BINDING INDIVIDUAL ARBITRATION AND INCLUDES A WAIVER OF CLASS ACTIONS AND JURY TRIALS. YOU MAY OPT OUT OF ARBITRATION WITHIN 30 DAYS AS DESCRIBED IN SECTION 18.7.
These Terms govern your access to and use of the Platform, including our websites, mobile and desktop applications, and all content, software, and services made available through them (collectively, the "Service"). Certain features may be subject to additional posted terms (for example, promotional offers or beta features). If additional terms conflict with these Terms, the additional terms control for that feature.
Our Privacy Policy describes how we collect, use, and share information about you. The Privacy Policy is a separate statement of our practices and is not a part of these Terms, but we encourage you to read it before using the Service.
Eligibility
You must be at least 18 years old (or the age of majority in your place of residence, if higher) to create an account. If you are between 13 and 17 years old, you may use the Service only through an account created by, and under the supervision of, a parent or legal guardian who agrees to these Terms on your behalf and is responsible for your use. The Service is not directed to, and may not be used by, children under 13, and we do not knowingly collect personal information from children under 13.
Your account
You must provide accurate and complete registration information and keep it up to date. You are responsible for your account credentials and for all activity under your account. Your account is personal to you: you may not sell, transfer, or share your account or credentials, and simultaneous use of one account by multiple households is not permitted. Notify us immediately at support@sinai.ai if you suspect unauthorized use of your account.
The Platform provides access to digital editions of books and other literary works licensed to us by
publishers and other rights holders (“Content”), together with AI-enhanced formats and features,
including AI-narrated audiobooks, translations, and an interactive AI assistant that can answer questions
about a work, provide contextual analysis, explanations, and study aids, and generate summaries and
recaps at your request (the “AI Assistant”).
Catalog and availability
The catalog of Content available on the Platform varies by country or region
and changes over time. Content is licensed to us by publishers for specific territories, formats, and
features, and a work (or particular features for a work, such as translation into a given language or audio
narration) may be available in some locations and not others, or may be added to or removed from the
catalog. Section 6 describes what happens to Content you have already acquired if it is later removed
from the catalog.
Content is licensed, not sold
When you redeem a credit for, or purchase, a work, you receive a license to access that work on the Platform. You do not acquire any ownership interest in any Content. All Content is owned by the publishers and rights holders that license it to us, or by their licensors, and is protected by copyright and other intellectual property laws of the United States and other countries.
Scope of your license
Subject to these Terms, when you redeem a credit for or purchase a work, Sinai grants you a personal, non-exclusive, non-transferable, non-sublicensable license to stream, access, and interact with that work, and with AI outputs generated from it through the Service, solely on and through the Platform, and solely for your personal, non-commercial use. The same license applies to Content included with a subscription for so long as your subscription is active and the work remains in the subscription catalog.
Platform-only access
Content may be accessed only through the Platform's authorized apps and interfaces. Except for any offline playback or reading feature that we expressly provide within our apps (which stores Content in encrypted form accessible only through the app), you may not download, export, copy, or store Content outside the Platform. Your license does not include any right to reproduce, redistribute, publicly perform, publicly display, broadcast, or make derivative works from any Content, or to make Content available to any third party.
Content protection
We use digital rights management, access controls, and other technical protection measures to protect Content and to comply with commitments we have made to the publishers and authors whose works appear on the Platform. You agree not to interfere with, disable, or circumvent these measures, and you acknowledge that they are "technological measures" protected under Section 1201 of the U.S. Digital Millennium Copyright Act and equivalent laws elsewhere.
Credits
Subscription plans include a number of credits per billing period, as described at sign-up. You may redeem a credit to add a specific work to your library; redemption grants you the license described in Section 4 for that work. Unused credits roll over for up to 12 months and if your subscription ends, they expire after 30 days as described on the plan page. Credits have no cash value, are not redeemable for money (except where required by law), and may not be sold or transferred.
Individual purchases
You may also buy access to individual works on a one-time basis at the price displayed at checkout, independent of any subscription. An individual purchase grants you the same scope of license described in Section 4.
Automatic renewal
IF YOU ENROLL IN A SUBSCRIPTION, YOUR SUBSCRIPTION WILL CONTINUE, AND YOUR PAYMENT METHOD WILL BE CHARGED THE SUBSCRIPTION FEE (PLUS APPLICABLE TAXES) AT THE START OF EACH BILLING PERIOD, UNTIL YOU CANCEL.
Before you complete an enrollment, we will disclose the price, billing frequency, first charge date, and how to cancel, and we will ask for your affirmative consent to the recurring charge. After enrollment, we will send you a confirmation that includes the subscription terms and cancellation instructions, and we will send you periodic reminders where required by law
Cancellation
You can cancel your subscription at any time directly through your account settings. Cancellation will take effect at the end of your current billing or trial period; you will retain access to subscription features until then. Canceling an active, paid subscription does not remove works you acquired by credit redemption during a paid billing period or through individual cash purchases, which remain accessible in your library subject to Section 6. However, any works or Content redeemed using credits during a free trial or promotional period will not remain in your library upon cancellation, unless you convert to and remain a paid subscriber.
Free trials and promotions
If a subscription starts with a free trial or promotional rate, we will disclose before you enroll the price you will be charged when the trial or promotion ends, the date or event that triggers the first charge, and how to cancel before you are charged. If you do not cancel before the trial or promotional period ends, your subscription converts to a paid subscription at the disclosed price.
Refunds
Except as required by law or expressly stated in a posted refund policy, payments are non-refundable. Nothing in this Section limits any non-waivable refund, cooling-off, or cancellation right you have under applicable law.
Price changes
We may change subscription prices or credit structures prospectively. We will give you advance notice of any price increase or material change to your plan, and the change will take effect no earlier than your next billing period that begins after the notice period. If you do not agree to a changed price, cancel before the change takes effect; continued use after the effective date, where permitted by law, or your affirmative consent, where required, constitutes acceptance.
Works you acquire by credit redemption or individual purchase remain in your library, and remain accessible to you on the Platform, even if the work is later removed from our catalog for new customers, for so long as we operate the Platform and are lawfully able to make the work available. This mirrors the commitments made to us by our publishing partners. Two limits apply: (a) if a work must be withdrawn because of a legal requirement, court order, or a bona fide claim of intellectual property infringement or other unlawfulness, we may suspend or remove access to the extent required, and where reasonably practicable we will provide a replacement or a credit; and (b) after a work is removed from the catalog, you can continue to access the work and any AI outputs previously generated for you from it, but new AI-generated formats or outputs from that work (for example, a new translation or new AI narration) may no longer be available.
Your Outputs
The AI Assistant generates responses on demand based on the work you are reading or listening to. As between you and Sinai, and subject to the license limits in Section 4 and the rules in Section 8, you own the notes, highlights, questions and answers, summaries, and other outputs generated for you by the AI Assistant ("Your Outputs"). Your Outputs are for your personal, non-commercial use within the Platform.
Privacy of Your Outputs
Your Outputs are private to your account. We do not share Your Outputs with publishers or other third parties, and we do not use them for advertising. We access Your Outputs only as necessary to provide the Service to you, to maintain the security and integrity of the Platform, or as required by law, as further described in our Privacy Policy
Limits on AI features
The AI Assistant is designed to support engagement with a work, not to substitute for it or to unlock rights that have not been licensed. The AI Assistant will not, and you agree not to attempt to make it: (a) reproduce the full text, or substantial verbatim portions, of any work; (b) generate a complete or substantially complete translation, audiobook, dramatization, or other alternate format of a work, except through features we expressly offer for that work; or (c) circumvent territorial or feature restrictions that apply to a work. Attempts to do any of these things violate Section 8.
AI accuracy
AI-generated content, including AI narration, translations, summaries, and AI Assistant responses, may contain errors, omissions, or inaccuracies, and may differ from the underlying work. AI outputs are provided for convenience and engagement and are not a substitute for the work itself, and are not professional, medical, legal, financial, or educational advice. Where accuracy matters, consult the underlying work.
Usage Limits and Fair Use
To ensure platform stability, prevent system abuse, and maintain service quality for all users, Sinai reserves the right, in its sole discretion and without prior notice, to establish, modify, or enforce usage limits on the AI Assistant. These limits may include, without limitation, daily or monthly token allocations, query rate limits, output length restrictions, or temporary throttling of access to AI features. Exceeding fair-use thresholds may result in temporary suspension or slowdown of your access to the AI Assistant. Such operational adjustments do not constitute a material defect or material change to the Service under Section 13.
The Platform is a closed ecosystem built on licenses from publishers and authors, and its integrity depends on Content staying inside it. Illegal downloading, ripping, scraping, or extraction of Content is not permitted on or from the Platform in any form. Any attempt to copy, extract, or redistribute Content outside the Platform is a direct violation of copyright law and of these Terms, whether or not the attempt succeeds. Unauthorized reproduction or distribution of copyrighted works may result in civil liability under the U.S. Copyright Act (17 U.S.C. §§ 106 and 501), statutory damages, and, for willful infringement, criminal penalties (17 U.S.C. § 506; 18 U.S.C. § 2319), in addition to the remedies described in these Terms.
You agree that you will not, and will not assist, enable, or permit anyone else to:
download, save, export, copy, reproduce, print, or store any Content outside the Platform's authorized apps, except through an offline feature we expressly provide;
rip, record, capture, screen-record, or re-digitize any Content, including audio playback and displayed text;
scrape, crawl, spider, harvest, or use any bot, script, or automated means to access the Service or extract Content or data from it;
circumvent, disable, remove, or interfere with digital rights management, encryption, access controls, territorial restrictions, or other technical protection measures, or use tools designed to do so;
use the AI Assistant or any other feature to reconstruct, reproduce, or extract the text or audio of any work, in whole or in substantial part, or to generate alternate formats of a work not offered through the Service;
use any Content, or any AI output generated from Content, to train, fine-tune, or develop any machine learning or artificial intelligence model;
share, sell, rent, lend, or transfer your account, credentials, credits, or library, or make Content available to any person other than yourself (and, for parent-managed accounts, the minor you supervise);
misrepresent your location or use VPNs, proxies, or similar tools to access Content not licensed for your territory;
reverse engineer, decompile, or disassemble any part of the Service, except to the extent this restriction is prohibited by applicable law;
interfere with the operation or security of the Service, probe or test its vulnerability, or access accounts, systems, or data you are not authorized to access; or
use the Service for any unlawful purpose or in violation of these Terms.
Enforcement
We monitor for and investigate unauthorized extraction, sharing, and other abuse, using technical and manual means, as described in our Privacy Policy. Violations of this Section 8 are material breaches of these Terms. In addition to any other remedy, we may immediately suspend or terminate your account and revoke the licenses granted in Section 4, and we may notify, cooperate with, and provide relevant information to affected publishers and law enforcement in connection with piracy or other unlawful conduct.
We make binding commitments to the publishers and rights holders whose works appear on the Platform, including that Content will remain confined to the Platform, that user interactions will not create unauthorized copies or formats of their works, and that their works will not be used to train third-party AI models. The restrictions in Sections 4, 7, and 8 exist in part to honor those commitments. The publishers and rights holders whose Content you access are intended third-party beneficiaries of your obligations under Sections 4, 7, and 8 of these Terms, solely to the extent needed to protect their rights in their Content, and may enforce those obligations against you directly. These Terms otherwise create no third-party rights.
Ownership
The Platform, including its software, AI models, interfaces, design, trademarks, and all technology underlying the Service, is owned by Sinai and its licensors and is protected by intellectual property laws. Content is owned by the publishers and rights holders that license it to us. Except for the limited licenses expressly granted in these Terms, no rights are granted to you by implication or otherwise.
Feedback
If you send us feedback, suggestions, or ideas about the Service, you grant us a perpetual, irrevocable, worldwide, royalty-free license to use them without restriction or compensation. This license does not extend to Your Outputs, which are addressed in Section 7.
We respect intellectual property rights and expect users to do the same. If you believe material on the Platform infringes your copyright, send a notice complying with 17 U.S.C. § 512(c)(3) to our designated agent: [Attn: Copyright Agent, Sinai.ai Inc., 1007 N Orange St. 4th Floor , 3395, Wilmington, DE 19801, New Castle, US, copyright@sinai.ai. We will respond to valid notices, including by removing or disabling access to the identified material where appropriate, and we will terminate the accounts of repeat infringers in appropriate circumstances. If material you posted or generated was removed in response to a notice, you may submit a counter-notice under 17 U.S.C. § 512(g).
Our Privacy Policy, available at sinai.ai/privacy-policy, describes how we collect, use, and share information about you, including your reading and listening activity and your interactions with the AI Assistant, and the choices and rights available to you. The Privacy Policy is not incorporated into these Terms.
We continually improve the Platform and may add, modify, or discontinue features. We may also change the AI models and technology that power the Service. If we discontinue the Platform entirely or materially reduce the core service you paid for, we will provide reasonable advance notice and, where required by law, a pro-rata refund of prepaid amounts for the unexpired portion of your subscription.
We may revise these Terms from time to time. If a change is material, we will notify you at least 30 days before it takes effect by email or prominent in-app notice, and the change will apply prospectively only. If a material change affects the dispute resolution provisions in Section 18, your pricing obligations, or your license rights in works you have already acquired, we will ask for your affirmative consent, and the prior version will continue to govern until you accept. If you do not agree to a revised version, you may stop using the Service and close your account; material changes you have not accepted will not apply to disputes arising from events before the change.
By you
You may close your account at any time in your account s
By us
We may suspend or terminate your access to the Service (in whole or in part) if you materially breach these Terms, if required by law or by the loss of rights necessary to operate the Service, or to address security, fraud, or abuse. For breaches other than violations of Section 8 (anti-piracy), fraud, or unlawful conduct, we will give you notice and a reasonable opportunity to cure before terminating. Violations of Section 8 may result in immediate suspension or termination without refund.
Effect of termination
If your account is closed by you, or terminated by us other than for your material breach, works acquired by credit redemption or individual purchase remain accessible under Section 6 if you retain or reopen an account in good standing, and we will provide a reasonable mechanism to regain access to your library. If we terminate your account for material breach of Section 8, your licenses under Section 4 terminate and access to your library may be revoked without refund. Sections 4 (license limits), 7 through 11, and 14 through 19 survive termination.
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE SERVICE AND ALL CONTENT AND AI OUTPUTS ARE PROVIDED "AS IS" AND "AS AVAILABLE," WITHOUT WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND NON-INFRINGEMENT. WITHOUT LIMITING THE FOREGOING, WE DO NOT WARRANT THAT THE SERVICE WILL BE UNINTERRUPTED, ERROR-FREE, OR SECURE, THAT ANY WORK WILL REMAIN AVAILABLE IN THE CATALOG, OR THAT AI OUTPUTS WILL BE ACCURATE OR COMPLETE. SOME JURISDICTIONS DO NOT ALLOW THE EXCLUSION OF IMPLIED WARRANTIES, SO SOME OR ALL OF THE ABOVE EXCLUSIONS MAY NOT APPLY TO YOU; IN THAT CASE, IMPLIED WARRANTIES ARE LIMITED TO THE MINIMUM SCOPE AND DURATION PERMITTED BY LAW. NOTHING IN THESE TERMS LIMITS ANY CONSUMER RIGHT THAT CANNOT BE WAIVED BY CONTRACT.
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW: (A) SINAI WILL NOT BE LIABLE FOR INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, EXEMPLARY, OR PUNITIVE DAMAGES, OR FOR LOST PROFITS, REVENUES, DATA, OR GOODWILL, ARISING OUT OF OR RELATING TO THE SERVICE OR THESE TERMS; AND (B) SINAI'S TOTAL LIABILITY FOR ALL CLAIMS ARISING OUT OF OR RELATING TO THE SERVICE OR THESE TERMS WILL NOT EXCEED THE GREATER OF (i) THE AMOUNTS YOU PAID TO SINAI FOR THE SERVICE IN THE TWELVE (12) MONTHS BEFORE THE EVENT GIVING RISE TO THE CLAIM AND (ii) ONE HUNDRED U.S. DOLLARS (US$100). THESE LIMITATIONS DO NOT APPLY TO LIABILITY THAT CANNOT BE LIMITED BY LAW, INCLUDING LIABILITY FOR DEATH OR PERSONAL INJURY CAUSED BY NEGLIGENCE, FOR FRAUD, OR FOR GROSS NEGLIGENCE OR WILLFUL MISCONDUCT, AND THEY DO NOT LIMIT ANY NON-WAIVABLE STATUTORY REMEDY. SOME JURISDICTIONS DO NOT ALLOW CERTAIN LIMITATIONS OF LIABILITY, SO SOME OF THE ABOVE MAY NOT APPLY TO YOU.
18.1 Governing law
These Terms and any dispute arising out of or relating to them or the Service are governed by the laws of the State of California, without regard to conflict-of-laws rules, except that the Federal Arbitration Act governs Section 18. If you reside in a jurisdiction whose law gives you non-waivable rights or protections, nothing in this Section deprives you of them.
18.2 Informal resolution first
Before filing a claim, you and Sinai each agree to try to resolve the dispute informally. Either party may start the process by sending the other a written notice describing the dispute and the relief sought (to us: support@sinai.ai; to you: the email on your account). The parties will confer in good faith, by phone or videoconference if either requests it, and neither party may commence an arbitration or court proceeding (other than small claims) until 60 days after the notice is received. The applicable statute of limitations is tolled during this period.
18.3 Arbitration agreement
Except as provided in Section 18.4, any dispute arising out of or relating to these Terms or the Service that is not resolved informally will be resolved by final and binding arbitration on an individual basis, administered by JAMS under its Streamlined Arbitration Rules and its Consumer Arbitration Minimum Standards (or, if JAMS is unavailable, a comparable administrator agreed by the parties or appointed by a court). Judgment on the award may be entered in any court of competent jurisdiction. The arbitrator (not a court) resolves all disputes about the interpretation, applicability, or enforceability of this arbitration agreement, except that a court decides whether Section 18.5 (class waiver) is enforceable. Arbitration will be conducted in English, by one arbitrator, remotely by videoconference or, if an in-person hearing is required, in the county where you reside (or another mutually agreed location). Your filing fees will be capped at the amount set by the JAMS consumer standards (currently US$250), and Sinai will pay all remaining JAMS fees and arbitrator compensation. The arbitrator may award the same individual relief a court could, including statutory damages and attorneys' fees where authorized by law, and nothing in this Section shortens any statute of limitations or limits any remedy you would have in court on an individual claim.
18.4 Exceptions
Either party may (a) bring an individual claim in small claims court in your county of residence (or, for Sinai, in Santa Clara County, California) if the claim qualifies, and (b) seek injunctive or other equitable relief in a court of competent jurisdiction to protect intellectual property rights, to address actual or threatened violation of Section 8 (anti-piracy), or to address unauthorized access to or extraction from the Platform, in each case without waiving the right to arbitrate other disputes. You may also pursue claims for public injunctive relief in court where that right cannot be waived.
18.5 Class action waiver; jury waiver
YOU AND SINAI EACH WAIVE THE RIGHT TO A JURY TRIAL AND THE RIGHT TO PARTICIPATE IN A CLASS ACTION, CLASS ARBITRATION, OR OTHER REPRESENTATIVE PROCEEDING. Disputes will be arbitrated only on an individual basis; the arbitrator may not consolidate claims of different users, and may award relief only in favor of the individual party seeking relief. If this class waiver is found unenforceable as to a particular claim, that claim (and only that claim) will proceed in court, and the remainder will stay in arbitration.
18.6 Mass filings
If 25 or more demands for arbitration raising similar claims and represented by the same or coordinated counsel are filed against Sinai, the JAMS Mass Arbitration Procedures and Guidelines (including their fee schedule and Process Administrator mechanism) will apply, and the parties will cooperate in good faith on a fair, efficient process, which may include resolving bellwether cases first while other cases are tolled. This Section does not limit any right you retain under Section 18.4 or the JAMS consumer standards.
18.7 Your right to opt out
You may opt out of this arbitration agreement (Sections 18.3 through 18.6) entirely by sending written notice to claims@sinai.ai within 30 days after you first accept these Terms, stating your name, account email, and intent to opt out. Opting out does not affect any other provision of these Terms and will not disadvantage your use of the Service. If you opt out (or where arbitration does not apply), disputes will be resolved in the state or federal courts located in [Santa Clara County, California], except that you may litigate in your home forum where the law gives you that right, and both parties consent to personal jurisdiction there.
Export and sanctions
The Service is subject to U.S. export control and economic sanctions laws. You represent that you are not located in, and will not use the Service in, any country or region subject to comprehensive U.S. sanctions, and that you are not on any U.S. government restricted-party list. We may restrict availability of the Service or particular Content in any jurisdiction to comply with law or our license commitments.
Miscellaneous
You may not assign these Terms. We may assign these Terms in connection with a merger, acquisition, or sale of assets, or by operation of law; your rights under these Terms, including your library access under Section 6, will bind our successor. These Terms are the entire agreement between you and Sinai about the Service and supersede prior agreements on that subject. If any provision is found unenforceable, it will be enforced to the maximum extent permitted and the remainder will remain in effect. Our failure to enforce a provision is not a waiver. Notices to you may be given by email to your account address or in-app; notices to us should go to support@sinai.ai. "Including" means "including without limitation."
Contact
Questions about these Terms: contact us at support@sinai.ai