Terms of Use - eustella

eustella Terms of Use

Last updated: 22.04.2026

Thank you for using eustella!

These Terms of Use ("Terms") apply to your use of eustella and its associated services, including our mobile applications, web interfaces, AI agent features, and any related software, technology, and websites ("Services"). You form a contract with us when you confirm that you accept these Terms or when you otherwise use the Services.

Our Business Terms govern use of eustella for businesses and organisations.

Our Privacy Policy explains how we collect and use personal information. Although it does not form part of these Terms, it is an important document that you should read.

Who we are

eustella is built by AI Newsrooms Technology GmbH - a European AI company based in Vienna, Austria. Our mission is to build a trustworthy, sovereign AI agent for Europeans - private, transparent, and independent. For more information, visit eustella.com.

AI Newsrooms Technology GmbH
Schönbrunner Straße 231, 1120 Vienna,

Email: legal@eustella.com

Company register: FN number

Commercial Court of Vienna

Additional Service-specific Terms

Depending on the specific Service or features you use, additional terms and policies may apply. The key ones to be aware of, and which form part of these Terms, are described below:

Usage Policy: these policies explain how you may use our Services and Content. Usage Policy
Service Terms: these terms apply when you use certain Services or features. eustella Service Terms
Sharing & Publication Policy: this policy sets out rules for when you share Content. eustella Sharing & Publication Policy
Brand Guidelines: these guidelines explain how you may use our name and logo.
Safety Guidelines: these guidelines explain the capabilities and limitations of AI, responsible use, and risks associated with AI-generated content and AI agents.

Registration and access

Minimum age. You must be at least 14 years old to use the Services.

Registration. You must provide accurate and complete information to register for an account. You may not share your account credentials or make your account available to anyone else and are responsible for all activities that occur under your account. If you create an account on behalf of another person or entity, you must have the authority to accept these Terms on their behalf.

Account creation. You may create an account using an email address and password, or by authenticating through a supported third-party identity provider (such as Google or Apple). When you authenticate through a third-party provider, we receive limited profile information (such as your name and email address) in accordance with that provider's terms and our Privacy Policy.

Using our Services

What you can do. Subject to your compliance with these Terms, you may access and use our Services. In using our Services, you must comply with all applicable laws as well as the Service-specific terms and policies listed above.

What you cannot do. You may not use our Services for any illegal, harmful, or abusive activity. For example, you are prohibited from:

Using our Services in a way that infringes, misappropriates, or violates anyone's rights.
Misusing our reporting or appeals processes, including providing manifestly unfounded submissions.
Modifying, copying, leasing, selling, or distributing any of our Services.
Attempting to or assisting anyone to reverse engineer, decompile, or discover the source code or underlying components of our Services, including our models, algorithms, or systems (except to the extent this restriction is prohibited by applicable law).
Automatically or programmatically extracting data or Output (defined below).
Representing that Output was made purely by a human when it was not.
Interfering with or disrupting our Services, including circumventing any rate limits or restrictions or bypassing any protective measures or safety mitigations we put on our Services.
Using our Services or Output to develop AI models that compete with eustella.
Using agentic features to perform actions you are not authorised to perform, or to circumvent access controls of any connected third-party service.

Agentic features. Our Services may include agentic capabilities that can perform tasks and take actions on your behalf, including interacting with third-party services you have connected (such as calendars, cloud storage, or other applications). When you enable agentic features, you authorise the proactive action of your eustella agent to act on your behalf within the scope of the permissions you grant. You remain responsible for all actions taken by the agent on your behalf and should review the agent's actions regularly.

Third-party services. Our Services allow you to connect third-party applications, platforms, and services ("Third-Party Services"). When you connect a Third-Party Service, you authorise eustella to access and interact with that service on your behalf, within the scope of the permissions you grant. Third-Party Services are subject to their own terms and privacy policies. We are not responsible for the content, functionality, security, or practices of any Third-Party Service you connected to eustella. You may disconnect any Third-Party Service at any time through your account settings.

Software. Our Services may allow you to download software, such as mobile applications, which may update automatically to ensure you're using the latest version. Our software may include open-source software that is governed by its own licences that we have made available to you.

Feedback. We appreciate your feedback about our Services, but you agree that we may use it to provide, maintain, develop, and improve our Services, without compensation to you.

Content

Your content. You may provide input to the Services ("Input"), and receive output from the Services based on the Input ("Output"). Input and Output are collectively "Content". You are responsible for Content, including ensuring that it does not violate any applicable law or these Terms. You represent and warrant that you have all rights, licences, and permissions needed to provide Input to our Services.

Ownership of content. As between you and eustella, and to the extent permitted by applicable law, you (a) retain your ownership rights in Input and (b) own the Output. We hereby assign to you all our right, title, and interest, if any and possible by law, in and to Output.

Similarity of content. Due to the nature of artificial intelligence, Output may not be original and other users may receive similar output from our Services. Our assignment above does not extend to other users' output or any Third-Party Output.

Our use of content. We may use your Content to provide, maintain, and improve our Services, to comply with applicable law, to enforce our terms and policies, and to keep our Services safe. We use your Content solely to operate the Services for you.

No model training on your data. We do not use your Content - including your conversations, documents, files, or any data from connected Third-Party Services - to train, fine-tune, or improve AI models. Your data is yours and stays yours. In the future, we may allow an option to voluntarily opt-in to model training, if you or other users want to help create the next generation of European AI Models.

Content moderation. We use automated systems and human review to identify and address content that violates our Terms, including our Usage Policies. If we become aware of violations, we may remove or restrict content, limit your access to features, or suspend or terminate your account.

Accuracy. Artificial intelligence and machine learning are rapidly evolving fields. We are constantly working to improve our Services to make them more accurate, reliable, safe, and beneficial. Given the probabilistic nature of machine learning, use of our Services may in some situations result in Output that does not accurately reflect real people, places, or facts.

When you use our Services you understand and agree:

Output may not always be accurate. You should not rely on Output from our Services as a sole source of truth or factual information, or as a substitute for professional advice.
You must evaluate Output for accuracy and appropriateness for your use case, including using human review as appropriate, before using or sharing Output from the Services.
You must not use any Output relating to a person for any purpose that could have a legal or material impact on that person, such as making credit, educational, employment, housing, insurance, legal, medical, or other important decisions about them.
Our Services may provide incomplete, incorrect, or offensive Output that does not represent eustella's views. In that case users may report this behavior which will allow us to increase the safety and performance of our Services. If Output references any third-party products or services, it does not mean the third party endorses or is affiliated with eustella.
When using agentic features that take real-world actions (such as sending messages, modifying files, or interacting with connected services), you should exercise particular care and review the agent's proposed actions before confirming them.

Our IP rights

We and our affiliates own all rights, title, and interest in and to the Services. You may only use our name and logo in accordance with our Brand Guidelines.

Paid accounts

Paid subscriptions. Some of our Services allow you to purchase paid subscriptions to benefit from enhanced features and functionalities (the "Benefits"). The exact nature of the Benefits differs between Services and will be made clear to you before purchase. You can manage your paid subscription from your account settings.

Fees. All charges, including subscription fees, will be made clear to you before purchase. All prices are inclusive of applicable VAT unless stated otherwise.

Billing. If you sign up for a paid subscription or purchase any Services, you will provide complete and accurate billing information, including a valid payment method. For paid subscriptions, we will automatically charge your payment method on each agreed-upon periodic renewal until you cancel. If your payment cannot be completed, we may downgrade your account or suspend your access to our Services until payment is received.

Right of withdrawal (cooling-off period). If you are a consumer habitually resident in the EU or EEA and you purchase a paid subscription, you have the right to withdraw from the contract within 14 days from the day on which the contract was concluded, without giving any reason and without incurring any costs other than those described below.

To exercise your right of withdrawal, you must inform us of your decision to withdraw by an unequivocal statement before the 14-day period has expired. You may use the model withdrawal form set out at the end of these Terms, but doing so is not obligatory — any clear statement is sufficient, including an email to support@eustella.com, an in-product withdrawal request, or a letter sent to our address above. To meet the withdrawal deadline, it is enough for you to send your communication concerning the exercise of your right of withdrawal before the 14-day period expires.

If, at the moment of purchase, you expressly request that we begin providing the paid Services during the 14-day cooling-off period and you acknowledge that you will lose your right of withdrawal once the Services have been fully performed, then:

if you withdraw before the Services have been fully performed, you must pay an amount which is in proportion to the part of the Services already provided up to the time you communicated your withdrawal, calculated on the basis of the total subscription price agreed in the contract; and
once the Services have been fully performed within the 14-day period (which, for a periodic subscription, means the end of that subscription period), you lose the right of withdrawal in respect of that performance, in accordance with Article 16(a) of Directive 2011/83/EU.

If you do not make that express request and acknowledgment, you remain entitled to a full refund within the 14-day period, regardless of any usage during it.

Refund. If you withdraw from the contract within the 14-day period, we will reimburse you all payments received from you, less any proportionate amount as described above, without undue delay and in any event no later than 14 days after the day on which we are informed of your withdrawal. We will use the same means of payment as you used for the initial transaction unless you have expressly agreed otherwise; in any event, you will not incur any fees as a result of the reimbursement.

Cancellation outside the cooling-off period. Following the 14-day cooling-off period, you can cancel your paid subscription at any time by updating your account settings. You will not be charged after you cancel. You will continue to have access to the Benefits until the end of the subscription period you have paid for, at which point your cancellation will become effective. Unless we specify otherwise or unless required by your statutory rights, you will not receive a refund or service credit for any days between the day you cancel and the last day of the subscription period you have paid for.

Price changes. We may change our prices from time to time. If we increase our subscription prices, we will give you at least 30 days' notice and any price increase will take effect on your next renewal so that you can cancel if you do not agree to the price increase.

Termination and suspension

Your rights. You can stop using our Services and end your relationship with eustella at any time by closing your account and stopping your use of the Services. Instructions for how to do this are available in your account settings. If you are an EU-based consumer who has just accepted these Terms, your 14-day right of withdrawal is described in the "Right of withdrawal (cooling-off period)" section above.

Our rights. We may take action to restrict, suspend, or terminate your access to our Services or close your account if we determine, acting reasonably and objectively:

You breached these Terms, including our Usage Policies.
We must do so to comply with the law.
Your use of our Services could cause risk or harm to eustella, our users, or anyone else.
Your account has been inactive for over a year and you do not have a paid account.

Notice. If we terminate your account, we will make reasonable efforts to notify you in advance so you can export your Content or data from the Services, unless it is not appropriate for us to do so, we reasonably believe that continued access to your account will cause damage to eustella or anyone else, or we are legally prohibited from doing so.

Appeals. If you believe we have suspended or terminated your account in error, you can file an appeal by contacting support@eustella.com.

Our commitments to you

How we provide the Services. We commit to provide the Services to you with reasonable skill and care and to act with professional diligence. We do not promise to offer the Services forever or in their current form for any particular period of time.

Liability. Provided that we have acted with professional diligence, we do not take responsibility for loss or damage caused by us, unless it is caused by our breach of these Terms or reasonably foreseeable at the time of entering into these Terms. We do not take responsibility for loss or damage caused by events beyond our reasonable control. We do not exclude or limit our liability to you in any way where it would be unlawful for us to do so. You still have the full protections of the laws applicable to you.

Your statutory rights. You have certain statutory rights as an European Citizen that cannot be limited or excluded by these Terms. These Terms are in no way intended to affect or restrict those rights. Some, but not all of those rights, include:

the right to withdraw from a distance contract within 14 days without giving any reason (EU Consumer Rights Directive);
protection against unfair contract terms that create a significant imbalance to your detriment (EU Unfair Contract Terms Directive, Austrian Consumer Protection Act / KSchG);
protection against unfair, misleading, or aggressive commercial practices (EU Unfair Commercial Practices Directive);
the right to access, rectify, erase, restrict, and port your personal data, and to object to its processing (EU General Data Protection Regulation);
the right to clear, comprehensible pre-contractual information before you are bound by the contract (EU Consumer Rights Directive); and
any additional rights provided under the laws of your country of residence that apply to you as a consumer.

This list is provided for your convenience, does not constitute legal advice and might not be exhaustive. In case of any conflict between these Terms and your mandatory statutory rights, your statutory rights prevail.

Consumer guarantee. EU consumer laws provide you with a legal guarantee covering the Services. If you have questions about your legal guarantee, please contact support@eustella.com or look at our FAQ section.

Dispute resolution

Informal resolution first. If we have a dispute, we would first like to understand and try to address your concerns before any formal proceedings. Please contact us at legal@eustella.com. We will make good-faith efforts to resolve the matter within 30 days of receiving your notice.

Governing law. These Terms and any dispute or claim arising out of or in connection with these Terms or the Services (including non-contractual disputes or claims, and including their subject matter or formation) are governed by and construed in accordance with the laws of Austria, excluding its conflict-of-law rules.

If you are a consumer habitually resident in an EU or EEA Member State, you additionally enjoy the protection of any mandatory provisions of the law of your country of residence. Nothing in these Terms affects your rights as a consumer under the mandatory laws that apply to you.

Users within the European Economic Area. If you are a consumer habitually resident in an EEA Member State, you may bring proceedings against us in the courts of your country of residence, and we may only bring proceedings against you in the courts of the Member State in which you are domiciled. This is required by the Brussels Ia Regulation (EU) No. 1215/2012 and cannot be overridden by these Terms.

If you are not a consumer (for example, you use eustella for business or professional purposes) and are established within the EEA, you agree that the courts of Vienna, Austria, shall have exclusive jurisdiction.

Users outside the European Economic Area. If you reside outside the European Economic Area, the following hierarchy applies to any dispute between you and eustella that cannot be resolved informally:

(1) Default — mandatory individual arbitration. Any such dispute, claim, or controversy arising out of or in connection with these Terms or the Services shall be resolved exclusively through binding individual arbitration, rather than in court. This agreement to arbitrate is governed by the Federal Arbitration Act (9 U.S.C. §§ 1 et seq.) to the extent you reside in the United States, and by Austrian arbitration law (§§ 577 et seq. ZPO) for all other users outside the EEA. Arbitration shall be administered by the Vienna International Arbitral Centre (VIAC) under its Rules of Arbitration in effect at the time the arbitration is commenced. The seat of arbitration shall be Vienna, Austria. The language of the arbitration shall be English. The arbitration shall be conducted by a sole arbitrator.

(2) Fallback — Vienna courts. The courts of Vienna, Austria, shall have exclusive jurisdiction only in the limited cases where (a) you have validly opted out of arbitration under the procedure described below, or (b) a particular claim is severed from arbitration because the class action waiver below is found unenforceable as to that claim.

Class action waiver. If you reside outside the European Economic Area, you agree that any dispute resolution proceedings will be conducted only on an individual basis and not as part of a class, consolidated, or representative action. You waive any right to participate in a class action lawsuit or class-wide arbitration against us. If this waiver is found to be unenforceable with respect to a particular claim, that claim — and only that claim — shall be severed and may proceed in court, while all other claims remain subject to individual arbitration.

30-day opt-out. If you reside outside the EEA, you may opt out of the mandatory arbitration and class action waiver provisions by sending written notice to legal@eustella.com within 30 days of first accepting these Terms. Your notice must include your name, the email address associated with your eustella account, and a clear statement that you wish to opt out. If you opt out, the Vienna courts referred to in subsection (2) above will have exclusive jurisdiction over any dispute or claim arising out of or in connection with these Terms or the Services.

Alternative dispute resolution for EEA users. If you reside in the EEA, you may also raise a dispute with an alternative dispute resolution body. The Internet Ombudsperson (Österreichisches Institut für angewandte Telekommunikation) is the competent out-of-court dispute resolution body in Austria for disputes arising from contracts entered into online.

General terms

Assignment. You may not assign or transfer any rights or obligations under these Terms without our prior written consent.

We may assign or transfer our rights or obligations under these Terms (a) by operation of law in connection with a merger or demerger of AI Newsrooms Technology GmbH (universal succession), or (b) in connection with a sale of all or substantially all of our assets or the business associated with the Services to a successor in interest. If you are a consumer, we will not transfer our obligations or this contract to a not-individually-named third party with debt-discharging effect without your express consent, in line with § 6 Abs 2 Z 2 of the Austrian Consumer Protection Act (KSchG) and equivalent mandatory provisions of EU consumer protection law. In any case, your statutory rights as a consumer will not be affected by any assignment.

Changes to these Services. We are continuously working to maintain and improve our Services. We may make modifications to the Services that are necessary to keep the Services in conformity with these Terms (for example, security updates, bug fixes, and performance improvements) at any time and at no additional cost to you.

Beyond such conformity-maintaining changes, we may also modify the Services where we have a valid reason to do so — including, for example, to adapt the Services to a new technical environment, to changes in the number of users, or to new legal or regulatory requirements; to add, replace, or discontinue features; or to align the Services with our product roadmap. Any such modification will be made at no extra cost to you, and we will inform you in a clear and comprehensible manner.

If a modification negatively affects your access to or use of the Services in more than a minor way, we will give you reasonable advance notice on a durable medium (for example, by email) of the features and timing of the modification, and of your right to terminate the contract free of charge within 30 days of receiving the notice or of the modification taking effect, whichever is later. This is in line with Article 19 of Directive (EU) 2019/770. If you have purchased a paid subscription and you terminate on this basis, we will reimburse the unused portion of any pre-paid fees on a pro-rata basis.

Changes to these Terms. We may update these Terms from time to time. We will give you at least 30 days' advance notice of any material change, either via email or an in-product notification. Material changes will only apply going forward. If you do not agree to a material change, you may stop using the Services and terminate your account before the changes take effect; if you continue to use the Services after the effective date, you accept the updated Terms.

Trade controls. You must comply with all applicable trade laws, including sanctions and export control laws.

Severability

If any provision of these Terms is found to be invalid, unlawful, or unenforceable by a competent court or authority, that provision shall be deemed severed from these Terms. The remaining provisions shall continue in full force and effect, provided that the Terms can reasonably continue to operate without the severed provision.

Where a provision is found to be unfair within the meaning of Directive 93/13/EEC on unfair terms in consumer contracts (as implemented by the Austrian Consumer Protection Act / KSchG), it shall not be binding on you as a consumer. We will not seek to replace it with a substitute term that approximates our original intent. Any gap resulting from the removal of an unfair term shall be governed by the applicable statutory provisions of Austrian law.

If the removal of any provision would make these Terms as a whole incapable of being performed or eustella cannot reasonably provide the services under certain provisions, both parties may terminate the contractual relationship by giving written notice to the other.

Annex: Model withdrawal form

(Complete and return this form only if you wish to withdraw from the contract.)

— To AI Newsrooms Technology GmbH, Schönbrunner Straße 231, 1120 Vienna, Austria, legal@eustella.com:

— I/We () hereby give notice that I/We () withdraw from my/our (*) contract for the provision of the following service:

— Ordered on ()/received on ():

— Name of consumer(s):

— Address of consumer(s):

— Signature of consumer(s) (only if this form is notified on paper):

— Date:

(*) Delete as appropriate.