Tessl Beta Terms of Service

Effective as of: 16 September 2025 • Last modified: 16 September 2025

Welcome to Tessl! Before accessing or using Tessl please read these Beta Terms of Service (Terms).

What's in these terms?
1. These Terms tell you the rules for using our Service (as defined below) and we recommend that you read them to make sure that you're happy with them. By accessing or using the Service, you agree to be bound by these Terms.
2. You understand that you may not enter into these Terms on behalf of your organization unless you have the legal authority to bind that entity.
Definitions
1. We use the following definitions throughout these Terms and you should know what we mean when we use each of these terms.
2. In these Terms:
  - AI Technologies means any and all training, self-improving, or machine-learning software, algorithms, hardware, or other artificial-intelligence or machine-learning tools or aids of any kind.
  - Beta Period means the period of time commencing on the date of these Terms and ending upon any of: (i) commercial release of the Service, or (ii) the discontinuation of the support or development of the Service by Tessl (in its sole discretion) in accordance with clause 6.3.
  - Data Protection Laws means (i) all applicable data protection and privacy legislation in force from time to time in the UK, including the assimilated EU law version of the General Data Protection Regulation ((EU) 2016/679) (UK GDPR), the Data Protection Act 2018 (and regulations made thereunder) (DPA 2018), or any successor legislation and all other legislation and regulatory requirements in force from time to time which apply to a party relating to the use of personal data (including, without limitation, the privacy of electronic communications).
  - Docs means the guidance documents and frequently asked questions published by Tessl and made available to Users on our website (https://tessl.io/), as may be updated from time to time.
  - Feedback means any ideas for improvement, suggestions, emojis, input or other feedback in connection with the Service provided by you or your Users to Tessl.
  - Service means our proprietary software product known at the date of these Terms as 'Tessl' made available to you (whether via the cloud, our website (https://tessl.io/ (https://tessl.io/)), as a desktop or mobile application, or as a plug-in or extension to third-party software) and the machine learning models and their related artifacts powering the platform, including documentation (e.g. instruction manuals), and any verification tools subject to and in accordance with these Terms on a trial, evaluation, alpha access, beta access or testing, preview, pre-release, prototype, or pilot basis.
  - Specification means structured natural language documentation which may include code snippets, diagrams, mockups, screenshots, tests and test code, as more fully described in our Docs.
  - Suggestion means code, Specifications, generated outputs or other functions that our Service suggests to Users based on the User Inputs
  - Tessl Materials means any software, tools, templates, libraries, documentation, configuration interfaces, Specifications, code, test code and any other resources created by us which are made available on our Service to assist and enable your and each User's workflow development.
  - User means the individual person, company, or organization that accesses the Service subject to and in accordance with these Terms.
  - User Inputs means any and all data, prompts, queries, documents, files, content, or information provided, entered, or submitted by a User for processing into (or used in connection with) our Service (but for clarity, does not include any Feedback). User Inputs shall exclude User Personal Data.
  - User Output means any software, Specifications, code, test code and document specifications created by Users through the Service to enable each User's workflow development.
  - User Personal Data means Personal Data (as defined under Data Protection Laws) in respect of Users which is uploaded or otherwise submitted to the Service directly by Users or by Tessl on behalf of Users but excluding any User Inputs and other types of data, as set out in our Privacy & Cookie Notice.
ACCOUNT REQUIREMENTS AND ACCESS
1. To access and use the Service, you (or, where you are an organization, the Users) will be required to create an account (Account), and you remain solely and fully responsible for the security of such Account and its log-in credentials.
2. You authorize us to access your computer infrastructure to the extent necessary to set up, configure and provide the Service to you.
3. Tessl allows you to integrate our Service directly into your development workflow and interact directly with our Service through your terminal, running commands, providing instructions to other AI agents, changing files and executing coding tasks without leaving your terminal. You are responsible for evaluating and bearing all risks associated with the use of our Service during the Beta Period, including any reliance on the accuracy, completeness or usefulness of Suggestions.
YOUR ABILITY TO USE OUR SERVICE
1. Ownership of our Service
  
  You acknowledge that all rights, title, and interest in and to the Service, any Specifications and Tessl Materials made available by us, including associated intellectual property rights, are owned by and will remain with us (or our licensors). Except as specified within these Terms or any licensing terms communicated on our Service or other repository, you are granted no right, title, interest or license hereunder, directly or indirectly, in or to any part of the Service.
2. We will absolutely own any and all rights and title (which will vest automatically in us) in and to any modifications, adaptations, developments, or any derivative works of or to the Service resulting from your or any User's use of or access to the Service (Improvements).If, by operation of law or otherwise, the foregoing is not effective, we will have all exclusive rights of use and exploitation in the Improvements, unlimited as to time, territory, and exploitation method and without charge to us or further compensation to you or any third party.
  
  Service license granted to you
3. Subject always to your full compliance with these Terms and payment of related fees (if applicable), we hereby grant to you a limited, revocable, non-exclusive, non-transferable, non-sublicensable right to use and access the Service solely and strictly: (i) during the Beta Period; and (ii) for trial and evaluation purposes.
4. You agree that we may at our discretion monitor compliance with these Terms from time to time. You may remove one individual as a User and replace them with another individual in accordance with these Terms. If we impose limits on the number of Users you are allowed within your organization, we shall notify you.
  
  Feedback
5. You hereby grant us a royalty free, fully paid up worldwide, transferable, sub-licensable, irrevocable, perpetual license to: (a) copy, distribute, transmit, display, perform, and create derivative works of the Feedback; and (b) use and exploit the Feedback without limitation.
USER INPUT AND USER OUTPUT
1. User Input
  
  You are solely responsible for all User Inputs and represent and warrant that: (i) you have obtained and will maintain all necessary and valid rights, licenses, rights, authorizations, and permissions to enter, submit, upload, or otherwise provide any User Inputs; and (ii) no User Inputs infringe any third-party rights (including without limitation Intellectual Property Rights and privacy rights) or contravene any applicable laws. The foregoing representations and warranties will be deemed to have been restated by you (and your Users) on each occasion that it enters, submits, uploads, or otherwise provides a User Input. You are entirely liable for the accuracy and quality of all User Inputs and must ensure that all your users comply with this clause 5 when using our Service.
2. You (or, as applicable, your licensors) will retain all rights (including Intellectual Property Rights), title, and interest in and to all User Inputs.
3. You hereby grant to Tessl a non-exclusive, irrevocable, perpetual, royalty-free, fully paid-up license:
  - to use, analyze, monitor, process, scan, copy, store, reproduce, create derivative works of each User Input;
  - to create anonymized, aggregated datasets of the User Input;
  - to operate, maintain, troubleshoot, debug, and improve the Services; and
  - to train our models.
4. You can read more about how we are using your data during the Beta Period in our Sharing Usage Data page in Docs.
  
  User Output
5. You agree not to present any User Output you create as endorsed by Tessl or solely created by humans. You are solely responsible for the User Output you create and make available via the Service. We are not responsible for any public display or misuse of your User Output.
6. If any new Intellectual Property Rights arise from the generation of a specific User Output then, notwithstanding anything to the contrary in the remainder of the Terms, as between the parties you will own such Intellectual Property Rights. You hereby grant to Tessl a non-exclusive, perpetual, irrevocable, worldwide, royalty-free and fully paid-up license, sublicensable and transferable right to use, copy, and otherwise utilise User Output to enable Tessl to exercise or perform its rights, remedies, and/or obligations under the Terms, improve its Service and train its models. You can read more about how we are using your data during the Beta Period in our Sharing Usage Data page in Docs.
Term and termination: Trial Basis
1. The Service provided to you during the Beta Period is a "pre-release" version. You understand that pre-release software may not operate correctly. Tessl may change the Service for the final commercial version, or may not release a commercial version at all. Tessl is not obligated to provide to you any maintenance, technical support, or updates for the Service during the Beta Period.
2. These Terms will commence on the date on which we and you enter into it and will continue for the duration of the Beta Period.
3. Without prejudice to any other rights or remedies available to us under these Terms or under applicable laws, we may terminate these Terms with or without notice to you at any time during the Beta Period without cause and at will.
4. Immediately upon the termination or expiration of these Terms or upon our request (whichever is earlier), you will (except to the extent expressly permitted under any subsequent written agreements between you and Tessl): (i) cease to access or make any use of the Service, and all rights and licenses granted by us to you shall immediately cease to have effect; (ii) irretrievably and securely erase (and, if applicable, uninstall) from all of your (and any Users') devices and systems any and all copies of the Service and any of our confidential information (as detailed in clause 10) and certify immediately thereafter to Tessl in writing that you have done so. Any provision of these Terms that expressly or by implication is intended to come into or continue in force on or after termination or expiration of the Terms will remain in full force and effect.
Restrictions
1. You agree that you will not, and ensure that no User will:
  - use the Service in a live product environment unless otherwise agreed beforehand in writing with the us;
  - attempt to reverse compile, disassemble, reverse-engineer, remove the weights of models or otherwise reduce to human-perceivable form all or any part of the Service (except as may be allowed by any applicable law which is incapable of exclusion by agreement between the parties);
  - license, sell, resell, transfer, rent, lease, distribute, exploit or otherwise make the Service available to anyone other than you or the Users;
  - use the Service to store or transmit infringing, obscene, libelous, or otherwise unlawful or tortious material, or to store or transmit material in violation of third-party privacy rights;
  - use the Service to send spam or otherwise duplicative or unsolicited messages in violation of applicable laws; or
  - copy, modify, transmit, distribute, frame or mirror any Service in any form or media or by any means;
  - use the Service to store or transmit malicious code or in any way that is unlawful or fraudulent;
  - interfere with, damage or disrupt the integrity or performance of the Service or third-party data;
  - attempt to gain or assist third parties to gain unauthorized access to the Service or our (or our affiliates') systems or networks;
  - access the Service for purposes of monitoring their availability, performance or functionality, or for any other benchmarking or competitive purposes;
  - permit any part of the Service to be integrated with any third-party product without our express prior written consent (being at our sole and absolute discretion);
  - use our Service to infringe or violate any third-party rights (including without limitation intellectual property rights, rights of likeness and publicity, and privacy rights);
  - use our Service to develop, train, or improve any separate or competing models, products, or services powered by or incorporating artificial-intelligence or machine-learning technologies;
  - overload or disrupt our systems, including spamming, excessive API requests, or other actions that degrade the performance or reliability of the Service; or
  - use, fine-tune, train, or otherwise develop our Service in such a way that it may be at risk of being deemed as having high-impact capabilities (as defined in the EU AI Act or equivalent legislation).
Disclaimers
1. The Service is provided to you during the Beta Period on an "as is" basis, and your use of and access to the Service during the Beta Period will be entirely at your sole risk. This includes any instance of the use of the Service in a live environment where our consent has been provided in writing. To the fullest extent permitted by applicable law, we make no warranties, representations, guarantees, or assurances relating to the Service, any outputs and/or our services and hereby expressly disclaim all warranties, express or implied, including without limitation those of merchantability, fitness for a particular purpose, and/or noninfringement. In particular, you agree and acknowledge that some Suggestions are provided without human oversight and may not be accurate, complete, up to date, or suitable for any particular use. You agree that you are responsible for evaluating, and bearing all risks associated with, the use of any Suggestions, including any reliance on the accuracy, completeness, or usefulness of Suggestions.
2. Without prejudice to clause 8.1, and to the fullest extent permitted by applicable law, we do not represent or warrant that: (i) your use of the Service during the Beta Period will meet your requirements; or (ii) your use of or access to the Service during the Beta Period will be uninterrupted, timely, secure, or free from error, defects, or bugs.
3. To the extent that your access to the Service is made available by the use of third parties and/or third-party plug-ins or application programming interfaces. We will (to the fullest extent permitted by applicable laws) have no liability for the performance of those third-party plug-ins or APIs or their compatibility with the Service.
4. The Service may include or incorporate optional third-party services, including without limitation, extensions and plug-ins that you may install yourself (“Third-Party Services”). We will clearly indicate such content or features as Third-Party Services via prominent notices or descriptions in the Service. If you elect, in your sole discretion, to access or use a Third-Party Service, your access and use of the Third-Party Service is subject to the terms provided by that Third-Party Service, and you remain responsible for complying with those terms. Tessl does not make any representations or warranties with respect to Third-Party Services.
5. The Service uses AI Technologies to generate Suggestions. Suggestions may contain errors and do not constitute professional advice. You are solely responsible for reviewing and validating any Suggestions before use. You assume full responsibility for the use of any Suggestions and agree not to rely on them for critical or high-risk functions without appropriate review and testing. The Services may produce similar or identical output for other users who submit similar prompts. Tessl does not guarantee that the Suggestions are unique, free of third-party rights, or suitable for any particular purpose. You are solely responsible for reviewing, testing, and using the Suggestions in compliance with applicable laws and third-party rights.
Liability
1. Nothing in these Terms will limit or exclude our liability for: (i) death or personal injury caused by our negligence; (ii) fraud or fraudulent misrepresentation; or (iii) any matter in respect of which it would be unlawful for us to exclude or restrict liability.
2. Subject to clause 9.1, we will not have any liability whatsoever (whether arising out of) for any:
  1. direct or indirect loss of (or damage to) profit, sales, savings, business, opportunity, revenue, turnover, agreements, or reputation;
  2. direct or indirect wasted expenditure;
  3. direct or indirect loss of use or corruption of, or damage to, software, data, or information
  4. direct or indirect losses arising out of the lawful termination hereof; or
  5. indirect, incidental, consequential, special, punitive, or exemplary losses, liabilities, or damages. We will have no liability for any delay or failure to perform any of our obligations if such failure or delay is caused by any event or series of events outside our reasonable control.
3. Subject to clause 9.1, our total liability to you or any other party for any losses or damages resulting from any claim arising out of or relating to this agreement, including but not limited to liability in contract, tort (including negligence), misrepresentation, restitution or otherwise, will not in the aggregate exceed $500 (five hundred dollars), even if you have advised us of the possibility of such losses or damages.
Confidentiality
1. You and we (each respectively a Receiving Party) each undertake not to disclose to any person or use any confidential information concerning the business of the other party (the Disclosing Party), or such other information which ought reasonably to be regarded as the confidential information of the Disclosing Party, except as permitted herein. Information will not be deemed to be confidential if such information:
  1. (i) is, or becomes, publicly known other than through a breach of these Terms;
  2. (ii) is in the possession of the Receiving Party prior to receipt thereof from the Disclosing Party;
  3. (iii) is independently developed by the Receiving Party; or
  4. (iv) is lawfully disclosed to the Receiving Party by a third party not subject to a confidentiality agreement or obligation relating to such disclosure. Each Receiving Party may disclose the Disclosing Party's confidential information: (a) to its staff or advisers who need to know such information for the purpose of exercising the Receiving Party's rights or undertaking its obligations hereunder (the Permitted Purpose), provided that such Receiving Party ensures that such persons fully comply with this clause 10.1 as though it applied to them and that such Receiving Party will be liable for any failure of such persons to do so; or (b) as may be required by law, a court of competent jurisdiction, or any governmental or regulatory authority.
    
    No Receiving Party will use the Disclosing Party's confidential information for any purpose other than the Permitted Purpose.
Data Protection and User Personal data
1. We and you will each comply with any applicable data protection laws. To the extent that we control or process any of your data, we will comply with our Privacy Notice (https://tessl.io/policies/privacy-cookies).
2. You agree and acknowledge that you and your Users will only provide us with User Personal Data where strictly required (e.g. for setting up your account) and that you will not upload or input User Personal Data as part of the User Input.
3. You and your Users retain all rights in your User Personal Data and you hereby grant to Tessl (for the duration of the Beta Period) a nonexclusive, royalty-free, and fully paid-up license to access and use your User Personal Data in order to perform our obligations under these Terms.
4. You acknowledge and understand that the performance of the Service entirely depends on the accessibility and quality of your User Personal Data. To the fullest extent permissible by applicable law, we disclaim any and all liability to you and your Users pertaining to the legality, integrity, accuracy and quality of your User Personal Data or for any failure of the Service to access any information which was not made available within your User Personal Data.
Miscellaneous
1. If you are an individual (as opposed to an organization), you warrant and represent that you are not a consumer and that your use of and access to the Service will not in any manner be outside the course or context of your trade, business, craft, or profession.
2. These Terms do not create any agency, partnership, employment, or joint venture relationship.
3. We may assign, novate, subcontract, or otherwise transfer any of our rights or obligations under these Terms. You may not do likewise without our prior written consent.
4. These Terms constitute the entire agreement between you and us and supersedes and extinguishes all previous agreements, promises, assurances, warranties, representations, and understandings between you and us, whether written or oral, relating to its subject matter.
5. No variation of these Terms will be effective unless effected by way of a written document that expressly refers to these Terms and is signed by the parties' respective duly authorized signatories.
6. If any provision or part-provision of these Terms is or becomes invalid, illegal, or unenforceable, it will be deemed deleted, but that will not affect the validity and enforceability of the rest of these Terms. No failure or delay by either party in exercising any right or remedy provided under these Terms or by law will constitute a waiver, prevent, or restrict the future exercise, of that or any other right or remedy.
7. You will comply (and will ensure all Users will comply) with all applicable laws, rules, and regulations governing export that apply to the Service (or any part thereof), and will not export or re-export, the Service (or any part thereof) to, or access or use the Service in, any territory for which an export license or other approval is required under the applicable laws without having obtained it.
8. No one other than a party to these Terms will have any right to enforce any of its terms.
9. These Terms and any dispute or claim (including non-contractual disputes or claims) arising out of or in connection with it shall be governed by and construed in accordance with English law. You and We irrevocably agree that the courts of London, England will have exclusive jurisdiction to settle any such dispute or claim.