Terms of Service

Effective date: 2026-09-17

These Terms of Service ("Terms") are a legally binding agreement between you and SoftQuantus innovative OÜ, a private limited company registered in Estonia under registry code 17048927, VAT number EE102767458, with its registered address at Veskiposti tn 2-1002, Kesklinna linnaosa, Tallinn 10138, Estonia ("SoftQuantus", "we", "us"). They govern your use of SynapseX — the chat at chat.synapsex.ai, the API platform at platform.synapsex.ai, the desktop and command-line applications, the quantum lab, and every other service, feature, or software we make available under the SynapseX name (together, the "Services").

By creating an account, clicking "continue", or otherwise using the Services, you agree to these Terms and to our Privacy Policy and Responsible Use Policy, which are incorporated by reference. If you do not agree, do not use the Services.

If you are using the Services on behalf of a company or another legal entity, you represent that you have authority to bind that entity, and "you" refers to it. Business and enterprise customers with a signed agreement are governed by that agreement where it conflicts with these Terms.

1. Who can use the Services

You must be at least 18 years old (or the age of majority where you live, if higher) to use the Services. You must not be barred from using them under the laws of any applicable jurisdiction, including sanctions and export-control laws, and you must not have been previously suspended or removed from the Services.

2. Your account

You need an account to use most of the Services. You agree to provide accurate information, to keep your credentials confidential, and to notify us promptly at info@softquantus.com if you believe your account has been compromised. You are responsible for all activity that happens under your account, whether or not you authorised it. Accounts may not be shared, sold, or transferred.

3. Using the Services

Subject to these Terms, we grant you a limited, non-exclusive, non-transferable, revocable licence to access and use the Services for your personal or internal business purposes. You may not:

• use the Services in a way that violates any law, regulation, or the rights of others, or help anyone else do so;
• use the Services in a way our Responsible Use Policy prohibits;
• attack, probe, scan, or overload our infrastructure or other users' workloads, or attempt to bypass metering, quotas, rate limits, safety systems, or access controls;
• reverse engineer, decompile, or attempt to extract the source code, model weights, or training data of the Services, except to the extent applicable law expressly permits;
• use the Services, or outputs from them, to develop models or products that compete with the Services, or to train machine-learning models without our written consent;
• forge, alter, or misrepresent evidence records, seals, or provenance data produced by the platform;
• access the Services by automated means other than through the API and clients we provide, or scrape them;
• represent output from the Services as human-generated where doing so would mislead, or use it to impersonate a person or organisation;
• resell, sublicense, or commercially redistribute the Services without a written agreement with us.

We may suspend, throttle, or limit access to protect the platform, other users, or third parties while we investigate suspected violations.

4. Inputs, outputs, and your content

You may provide prompts, code, circuits, files, and other content to the Services ("Inputs") and receive text, code, results, and other content generated in response ("Outputs"). Inputs and Outputs together are your "Content".

Ownership. You retain any rights you hold in your Inputs. As between you and SoftQuantus, and to the extent permitted by law, we assign to you all our right, title, and interest in the Outputs. Because machine-generated content can be similar for different users, Outputs may not be unique, and we cannot guarantee that another user will not receive similar Outputs.

Licence to us. You grant us the non-exclusive, worldwide licence needed to operate the Services: to host, store, process, execute, transmit, and display your Content back to you; to enforce these Terms and our policies; to comply with the law; and to keep the Services safe and reliable.

Training. We do not use your Content to train or fine-tune models unless you explicitly opt in. Any opt-in is described in the product at the point you give it and can be withdrawn at any time. The details are in the Privacy Policy.

Your responsibility. You are responsible for your Content and for making sure you have the rights and permissions needed to submit it. Outputs — including model answers, simulation and hardware results, code, and any medical, legal, financial, or scientific content — may be inaccurate or incomplete. You must evaluate them for your use case, including with human review where the stakes require it, and you must not rely on them as professional advice.

Feedback. If you send us suggestions or feedback, you grant us a perpetual, irrevocable, royalty-free licence to use it without restriction or obligation to you.

5. Plans, subscriptions, and credits

Free tier. Some of the Services are available at no charge, subject to usage limits that we may change.

Subscriptions. Paid plans are billed in advance on a recurring basis (monthly or annually, as shown at checkout) and renew automatically at the then-current price until you cancel. You can cancel at any time from your account settings; cancellation takes effect at the end of the current billing period, and you keep access until then. Prices exclude taxes unless stated otherwise; you are responsible for any taxes that apply.

Credits. Metered usage is charged in prepaid credits; one credit corresponds to $0.01. Before a paid run starts the platform shows an estimate, credits are reserved up front, and the reservation settles to actual usage when the run finishes — unused reserves are released back to your balance. Credits are a prepaid metering unit, not money: they are non-transferable, have no cash value, and cannot be redeemed for currency except where the law requires it.

Payments. Payments are processed by our third-party payment processor. By providing a payment method you authorise us and the processor to charge it for the amounts you incur. If a payment fails, we may downgrade or suspend paid features until it is settled.

Refunds and withdrawal. Except where the law requires otherwise, payments are non-refundable and there are no refunds or credits for partial billing periods or unused credits. If you are a consumer in the European Economic Area, you have a 14-day right of withdrawal from a distance contract; by asking us to start providing the Services immediately, you acknowledge that you lose that right once the Services have been fully performed, and that for services already delivered before you withdraw you owe a proportionate amount.

Price changes. We may change prices for future billing periods. We will give you at least 30 days' notice by email or in the product before a price change takes effect for you; if you do not agree, you may cancel before it does.

6. Beta, early-access, and third-party features

Features explicitly marked beta, preview, or early access — currently including the desktop and CLI applications (beta), partner QPU adapters (early access), and the SynapseX model family (early access, working names) — are provided for evaluation. They may change, misbehave, be rate-limited, or be withdrawn without the notice that applies to generally available features, and are excluded from any uptime or support commitment. Do not rely on them for production workloads unless you accept that risk.

The Services may connect to third-party services you choose to link (for example, an email or storage account, or a third-party quantum backend). Your use of those services is governed by their own terms, and we are not responsible for them.

7. Intellectual property

The Services — including the software, models, interfaces, documentation, trademarks, and all related intellectual property — are owned by SoftQuantus or its licensors and are protected by law. Except for the licence expressly granted in these Terms, no rights are transferred to you. SoftQuantus, SynapseX, QCOS, and QuantumLock are trademarks of SoftQuantus; you may not use them without our written permission.

If you believe content available through the Services infringes your copyright, write to info@softquantus.com with enough detail for us to identify the material and assess the claim.

8. Privacy

Our collection and use of personal data is described in the Privacy Policy. By using the Services you acknowledge that we process personal data as described there.

9. Disclaimers

THE SERVICES ARE PROVIDED "AS IS" AND "AS AVAILABLE". TO THE FULLEST EXTENT PERMITTED BY LAW, WE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, NON-INFRINGEMENT, AND ANY WARRANTY THAT THE SERVICES WILL BE UNINTERRUPTED, ERROR-FREE, SECURE, OR THAT OUTPUTS WILL BE ACCURATE OR RELIABLE. Artificial intelligence and quantum computing are evolving fields; Outputs, simulation results, and hardware results can be wrong, and you are responsible for validating them before relying on them.

Nothing in these Terms excludes or limits warranties or rights that cannot be excluded or limited under the law that applies to you. If you are a consumer in the EEA, you have the statutory remedies for non-conformity of digital content and digital services.

10. Limitation of liability

TO THE MAXIMUM EXTENT PERMITTED BY LAW, SOFTQUANTUS AND ITS AFFILIATES, OFFICERS, EMPLOYEES, AND SUPPLIERS WILL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, OR FOR LOST PROFITS, REVENUE, DATA, OR GOODWILL, ARISING OUT OF OR RELATING TO THE SERVICES OR THESE TERMS, HOWEVER CAUSED AND UNDER ANY THEORY OF LIABILITY, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

TO THE MAXIMUM EXTENT PERMITTED BY LAW, OUR TOTAL LIABILITY FOR ALL CLAIMS ARISING OUT OF OR RELATING TO THE SERVICES OR THESE TERMS WILL NOT EXCEED THE GREATER OF (A) THE AMOUNTS YOU PAID US IN THE TWELVE MONTHS BEFORE THE EVENT GIVING RISE TO THE CLAIM AND (B) €100.

These limitations do not apply to liability for death or personal injury caused by negligence, for fraud or wilful misconduct, or to any other liability that cannot be limited under applicable law — including the mandatory consumer-protection rules of the country where you live.

11. Indemnity

If you are a business user, you will defend, indemnify, and hold harmless SoftQuantus and its affiliates from claims, liabilities, damages, and expenses (including reasonable legal fees) arising out of your Content, your use of the Services, or your breach of these Terms or the law. This section does not apply to consumers.

12. Suspension and termination

You can stop using the Services at any time, and you can ask us to delete your account by writing to info@softquantus.com. We may suspend or terminate your access if you materially breach these Terms, if required by law, or if continuing to provide the Services would create risk for us, other users, or third parties. Where reasonable we will notify you and give you the chance to export your data first. We may also discontinue the Services or any part of them with reasonable notice.

On termination your licence ends and we may delete your Content in accordance with the Privacy Policy. Sections that by their nature should survive — including Sections 4, 7, 9, 10, 11, 14, and 15 — survive termination.

13. Changes to the Services and to these Terms

The Services evolve; we may add, change, or remove features. We may also update these Terms. If a change is material, we will give you at least 30 days' notice by email or in the product before it takes effect, unless the change is required by law or addresses a security risk, in which case it may take effect sooner. If you do not agree to the updated Terms, stop using the Services before the effective date; continuing to use them afterwards means you accept the updated Terms. The effective date at the top of this page always reflects the current version.

14. Governing law and disputes

These Terms are governed by the laws of the Republic of Estonia and the European Union, without regard to conflict-of-law rules. If you are a consumer, you also benefit from the mandatory consumer-protection provisions of the law of the country where you live, and you may bring proceedings in the courts of that country. For business users, disputes arising out of these Terms are subject to the exclusive jurisdiction of the competent courts of Harju County, Estonia.

Before starting formal proceedings, we ask that you contact us at info@softquantus.com so we can try to resolve the matter informally. Consumers in the EU may also use the European Commission's online dispute resolution platform at ec.europa.eu/consumers/odr.

15. General

• Entire agreement. These Terms, together with the policies they incorporate, are the entire agreement between you and SoftQuantus about the Services and supersede any prior agreements.
• Severability. If any provision is found unenforceable, it will be enforced to the maximum extent permitted and the rest of the Terms remain in force.
• No waiver. Our failure to enforce a provision is not a waiver of our right to do so later.
• Assignment. You may not assign these Terms without our written consent. We may assign them to an affiliate or a successor in connection with a merger, acquisition, or sale of assets.
• Export controls and sanctions. You must comply with all applicable export-control and sanctions laws and must not use the Services from, or on behalf of anyone in, a jurisdiction where they are prohibited.
• Force majeure. We are not liable for delay or failure caused by events beyond our reasonable control.
• Language. These Terms are written in English. Any translation is for convenience only; the English version prevails.

16. Contact

SoftQuantus innovative OÜ, Veskiposti tn 2-1002, Kesklinna linnaosa, Tallinn 10138, Estonia. Questions about these Terms: info@softquantus.com.