1. Acceptance of terms

These Terms of Service ("Terms") are a legal agreement between you and Shahriar Labs, Dhaka, Bangladesh ("LetX", "we", "us", or "our"), governing your access to and use of the LetX platform at letx.app and related websites, apps, and services (collectively, the "Service"). By creating an account, accessing, or using the Service, you agree to these Terms and to our Privacy Policy, which is incorporated by reference. If you use the Service on behalf of an organisation, you represent that you are authorised to bind that organisation, and "you" includes that organisation. If you do not agree, do not use the Service.

2. Eligibility & accounts

You must be at least 13 years old (or the minimum age of digital consent in your country) to use LetX. You are responsible for the accuracy of your account information, for keeping your credentials secure, and for all activity that occurs under your account, whether or not authorised by you. You must notify us promptly of any unauthorised use or security breach. We may refuse registration, or reclaim any username or workspace identifier, at our discretion.

3. License to use LetX

Subject to your compliance with these Terms, we grant you a limited, non-exclusive, non-transferable, non-sublicensable, and revocable license to access and use the Service for creating, editing, compiling, and collaborating on documents. This license exists only for as long as these Terms are in effect and may be revoked as described below. All rights not expressly granted are reserved.

4. Your content & intellectual property

You own your content. The documents, files, and materials you create or upload ("Your Content") remain yours. You grant us a worldwide, non-exclusive, royalty-free license to host, store, reproduce, process, transmit, display, adapt (for formatting and technical purposes), and back up Your Content, solely as needed to operate, secure, and provide the Service to you and the collaborators you invite (for example, to compile your document, sync real-time edits, or restore from backup). This license continues for a reasonable period after deletion to the extent needed for backups, security, and legal compliance, and otherwise ends when Your Content is deleted from our active systems.

We do not claim ownership of your work, and we do not use your private documents to train AI models without your explicit, opt-in consent (see §6). You are solely responsible for Your Content and represent that you have all rights necessary to upload it and grant the license above.

Our IP. The Service, including its software, design, branding, trademarks, and template library (other than Your Content), is owned by Shahriar Labs or its licensors and is protected by intellectual-property laws. These Terms grant you no rights in our IP except the limited license in §3.

Feedback. If you send us feedback, ideas, or suggestions, you grant us a perpetual, irrevocable, worldwide, royalty-free, sublicensable license to use them for any purpose without restriction, attribution, or obligation to you.

Aggregated & de-identified data. We may create and use aggregated, anonymised, or de-identified data (data that does not identify you or your content and cannot reasonably be used to do so) for any lawful business purpose, including operating, analysing, securing, improving, and promoting the Service. This data is not Your Content and this right survives termination.

5. Acceptable use

You agree not to, and not to permit anyone to:

Break the law, infringe others' rights, or upload content you don't have the right to use.
Attempt to disrupt, overload, probe, scrape, reverse-engineer, decompile, or gain unauthorised access to the Service, its infrastructure, or other users' data.
Use the Service to store or distribute malware, spam, or unlawful, harmful, deceptive, or abusive material.
Circumvent usage limits, rate limits, access controls, or any security or metering mechanism.
Resell, sublicense, or provide the Service to third parties except as expressly permitted (e.g. team/workspace features).

We have no obligation to monitor Your Content, but we may review, screen, or remove any content, and suspend or restrict any account, at our discretion — including to enforce these Terms, comply with law, or protect the Service or other users.

Copyright & takedowns. We respect intellectual-property rights. If you believe content on LetX infringes your copyright, contact [email protected] with enough detail to identify the work and the allegedly infringing material. We may remove infringing content and terminate repeat infringers.

6. AI features

AI features are optional and opt-in. When you enable them, relevant text is sent to third-party model providers to generate your result (see the Privacy Policy). AI output is generated automatically, may be inaccurate, incomplete, or unsuitable, and is provided without warranty — you are solely responsible for reviewing and verifying it before relying on it. You are responsible for your use of AI output, including ensuring it does not infringe third-party rights. We do not use your private documents to train AI models without your explicit consent, and we may add, change, limit, meter, or withdraw AI features at any time.

7. Plans, billing & refunds

LetX offers a free tier and paid ("Pro") plans. Paid plans are billed in advance on a recurring basis through our payment processor; you authorise us and our processor to charge your chosen payment method for each billing cycle until you cancel. You can cancel anytime; cancellation stops future renewals and paid access continues until the end of the current billing period. Prices, plans, and included allowances may change with reasonable notice, and changes apply from your next billing cycle.

Fees are stated exclusive of taxes; you are responsible for any applicable taxes, duties, or levies (other than taxes on our income). Except as expressly stated in our Refund Policy or where required by law, all payments are non-refundable and there are no refunds or credits for partial periods, unused features, or downgrades. If a payment fails or is charged back, we may suspend or downgrade your access. You are responsible for keeping your billing information current.

8. Free, trial & beta features

Free tiers, trials, promotional plans, and features labelled beta, preview, experimental, or "early access" are provided "as is", for evaluation, and at our discretion. They may have reduced or changing functionality, usage limits, or availability, may contain errors, and may be modified, suspended, or discontinued at any time without notice or liability. Any commitments in these Terms that reference paid plans do not apply to free or beta features except as we state in writing. We may also set and change usage limits (for example on compiles, storage, projects, collaborators, or AI usage) for any plan at any time.

9. Third-party services

The Service integrates with third-party services (e.g. Google and GitHub sign-in, GitHub import/export, payment processors, and AI model providers). Your use of those services is governed by their own terms and privacy policies. We do not control and are not responsible for third-party services, and we are not liable for their acts, omissions, availability, or content.

10. Changes to and availability of the Service

We are continuously developing the Service and may, at our sole discretion and at any time, add, modify, suspend, limit, or discontinue the Service or any feature, with or without notice, and without liability to you or any third party. The Service is provided on an "as available" basis; we do not guarantee uninterrupted, timely, secure, or error-free operation, and we may perform maintenance or experience downtime. You are responsible for keeping your own backups of important work.

11. Disclaimers

To the fullest extent permitted by law, the Service is provided "as is" and "as available" without warranties of any kind, whether express, implied, or statutory, including implied warranties of merchantability, fitness for a particular purpose, title, and non-infringement, and any warranties arising from course of dealing or usage of trade. We do not warrant that the Service will meet your requirements, be available or uninterrupted, or that documents, compiles, backups, or AI output will be accurate, preserved, or error-free. Some jurisdictions do not allow certain warranty exclusions, so some of the above may not apply to you.

12. Limitation of liability

To the fullest extent permitted by law, Shahriar Labs and its owners, employees, and suppliers will not be liable for any indirect, incidental, special, consequential, exemplary, or punitive damages, or for any loss of data, profits, revenue, goodwill, or business, arising out of or relating to the Service, whether based in contract, tort, or any other theory, even if advised of the possibility. Our total aggregate liability for all claims relating to the Service will not exceed the greater of (a) the amount you actually paid us for the Service in the 12 months before the event giving rise to the claim, or (b) USD 50. These limitations are an essential basis of the bargain and apply even if a limited remedy fails of its essential purpose.

13. Indemnification

You agree to defend, indemnify, and hold harmless Shahriar Labs and its owners, employees, and agents from and against any claims, damages, losses, liabilities, costs, and expenses (including reasonable legal fees) arising out of or relating to Your Content, your use of the Service, or your violation of these Terms, applicable law, or the rights of any third party.

14. Suspension & termination

You may stop using the Service and delete your account at any time. We may, at our sole discretion and with or without notice, suspend, restrict, or terminate your access to the Service or any account — including for violation of these Terms, suspected fraud or abuse, non-payment, legal or security reasons, or prolonged inactivity. On termination, your license to use the Service ends and we may delete your data in the ordinary course (subject to the Privacy Policy). Sections that by their nature should survive termination — including content and feedback licenses, aggregated-data rights, disclaimers, limitations of liability, indemnification, dispute resolution, and governing law — survive.

15. Dispute resolution

Before filing any claim, you agree to first contact us at [email protected] and attempt in good faith to resolve the dispute informally for at least 30 days. To the extent permitted by law, you agree that any dispute will be resolved on an individual basis and that you will not bring or participate in any class, collective, or representative action. Any claim you have relating to the Service must be brought within one (1) year after it arises, or it is permanently barred, to the extent permitted by law.

16. Governing law & jurisdiction

These Terms are governed by the laws of Bangladesh, without regard to conflict-of-laws rules. Subject to §15, the courts of Dhaka, Bangladesh will have exclusive jurisdiction over any dispute, and you consent to their jurisdiction and venue. Nothing prevents us from seeking injunctive or equitable relief in any competent court to protect our rights.

17. Changes to these terms

We may update these Terms from time to time. If we make material changes, we will update the date above and, where appropriate, provide notice (for example, in-app or by email). Changes are effective when posted unless stated otherwise, and your continued use of the Service after changes take effect means you accept the updated Terms. If you do not agree, your remedy is to stop using the Service.

18. General

These Terms, together with the Privacy Policy and Refund Policy, are the entire agreement between you and us regarding the Service and supersede any prior agreements. If any provision is found unenforceable, it will be limited or severed to the minimum extent necessary and the rest remains in effect. Our failure to enforce a provision is not a waiver. You may not assign or transfer these Terms without our written consent; we may assign them freely, including in connection with a merger, acquisition, or sale of assets. We are not liable for any delay or failure caused by events beyond our reasonable control (force majeure). These Terms create no third-party beneficiary rights. Headings are for convenience only. Notices to you may be given in-app or by email to your account address.

19. Contact

Questions about these Terms? Contact Shahriar Labs at [email protected] or [email protected].