Helio Additive Terms & Conditions

last updated: September 11, 2025

1. Introduction & Agreement

Welcome to Helio Additive! These terms explain how you can use our cloud-based simulation and optimization services (the “Services”). When we say “Helio,” “we,” “our,” or “us,” we mean Helio Additive, Inc., a Delaware company.  These terms apply to anyone using the Services, whether under a Personal Plan or a Business Plan. Sometimes extra terms may apply (for example, if you sign up for a specific feature or add-on). If that happens, those extra terms become part of this agreement too. By creating an account, clicking “I Agree,” or using the Services in any way, you’re agreeing to these terms. If you don’t agree, you shouldn’t use the Services. If you’re using the Services on behalf of a company or organization, you’re confirming that you have the authority to accept these terms for that company or organization. We may update these terms from time to time. If we make changes, we’ll update the “last updated” date at the top of this page. By continuing to use the Services after changes are posted, you agree to the revised terms. Finally, while our Services help optimize and simulate 3D printing processes, you are always responsible for reviewing and validating your own gcode before printing. Helio cannot be responsible for wasted material, failed prints, or any damage to hardware that may result from use of the Services.

2. Definitions

Here’s what we mean when we use certain terms in these Terms & Conditions:

“Services” – The cloud-based simulation and optimization software and related features we provide through Helio Additive, whether accessed directly via the Helio dashboard or through integrations with third-party software such as slicers (e.g., Bambu Studio), printer software, or APIs.
“Personal Plan” – Free and/or paid subscription options for simulations and/or optimizations that include, but aren’t limited to, Lite, Plus, and Plus Annual. These plans come with standard confidentiality and service terms.
“Business Plan” – Paid subscription options for simulations and/or optimizations that include, but aren’t limited to, Biz Plus, Biz Plus Annual, and Pro. These plans include enhanced confidentiality and service terms designed for business customers.
“Users” – Individuals or entities authorized to access and use the Services under a Personal Plan or Business Plan.
“Simulations” – Physics-based “digital twins” of a particular gcode, for a specific material and printer, generated by the Services.
“Optimizations” – Adjusted or improved versions of Simulations that recommend changes to improve printing performance, speed, or reliability.
“Output” – Any results, reports, recommendations, or files generated by the Services, including Simulations and Optimizations.
“User Content” (or “Customer Data”) – Any data, files, models, or information you upload, submit, or otherwise provide when using the Services (including but not limited to gcode files, STL/CAD models, and material settings). You always retain ownership of your User Content.
“Plans” – The different subscription options available for the Services, including Personal Plans, Business Plans, and any add-ons or upgrades.
“Support Channels” – The official ways you can contact us for help, including email, ticketing systems, or other methods we may provide.
“Documentation” – Any guides, technical instructions, FAQs, or other materials we provide to explain how to use the Services.
“Third-Party Services” – Products or services provided by others (such as slicers, printers, cloud platforms, or integrations) that may work with or alongside our Services.
“Feedback” – Any suggestions, comments, or ideas you share with us about improving the Services. By giving us Feedback, you grant us a worldwide, perpetual, irrevocable, royalty-free license to use it in any way without obligation to you.

3. Eligibility & Account Registration

Minimum age – You must be at least 13 years old to use a Personal Plan. If the law where you live sets a higher minimum digital consent age (for example, 16 in some EU countries), you must meet that requirement. If you are under 18, you may only use the Services under the supervision of a parent or guardian who agrees to these Terms.
Business accounts – If you’re signing up for a Business Plan, you confirm that you have the authority to bind your company or organization to these Terms, where appropriate.
Accurate information – You agree to provide complete and accurate information when creating an account and to keep your details up to date. If you provide false or misleading information, we may suspend or close your account.
Account responsibility – You are responsible for keeping your login details secure and for all activity that takes place under your account.
Our discretion – We reserve the right to refuse service, suspend accounts, or close accounts at our discretion, especially in cases of misuse, fraud, or violations of these Terms.

4. License & Rights of Use

License grant – When you use Helio, we give you a limited, non-exclusive, non-transferable, revocable license to access and use the Services for your own internal purposes, in line with your chosen Plan.
What you can’t do – You agree not to:
- Copy, modify, or create derivative works of the Services.
- Reverse engineer, decompile, or attempt to extract source code from the Services.
- Resell, sublicense, lease, or otherwise provide the Services to third parties without our permission.
- Use the Services or Output to train, develop, or improve any artificial intelligence, machine learning, or similar system without our prior written consent.
- Use the Services in any unlawful, harmful, or abusive way (for example, to develop competing products or disrupt others’ use of Helio).
Our ownership – The Services, including all software, algorithms, models, data (other than your User Content), and intellectual property, are owned and controlled by Helio Additive, Inc. You don’t acquire any ownership rights by using the Services.
Your content – You always retain ownership of your User Content (like gcode files you upload). By using the Services, you give us permission to process and use your User Content only as needed to provide the Services to you.
Output – However, Output is provided for informational purposes only and comes with no guarantee of accuracy. Helio retains all rights in and to the underlying technology used to generate that Output. You own the optimized gcode generated through your use of the Services.

5. Fair Use

We want Helio to run smoothly for everyone, so we apply a fair use policy to all accounts.

Personal Plans – Personal accounts may have limits on concurrent simulations or optimizations, and in some cases limits on gcode size or object size. These limits help us manage server loads and keep the experience consistent for all users.
Business Plans – Business accounts generally allow more concurrent simulations and optimizations.
Protecting free simulations – To keep free simulations available for genuine users, we reserve the right to block abuse, including automated bots, mass submissions, or other activity that unfairly consumes resources.
Our discretion – We may adjust limits or suspend usage if we believe your activity is excessive or unfair, even if it technically fits within your Plan. (https://wiki.helioadditive.com/en/policies/fair)

6. Plans & Features

Helio offers different subscription Plans, including Personal Plans and Business Plans. Each Plan comes with its own service levels, data handling, and support options.

Personal Plans – Include standard privacy terms, deletion of gcodes after 30 days, community support (Wiki and Discord), and limited concurrent simulations and optimizations.
Business Plans – Include enhanced confidentiality terms, 24 hour deletion of gcodes, priority email support (target 24 hrs on business days) in addition to Wiki and Discord, and increased limits on concurrent simulations and optimizations.

The specific details of each Plan are described in the relevant storefront. We may update these details from time to time.

7. Confidentiality & Data Handling

We understand that your designs and print files are valuable. We take confidentiality seriously, but our commitments differ depending on your Plan.

7.1 Personal Plans (including free plans)

Reasonable care – We will handle your files responsibly and apply technical safeguards to reduce risks of unauthorized access.
No confidentiality guarantee – Because these Plans are low-cost or free, we cannot guarantee strict confidentiality. Files may be stored for up to 30 days to provide the Services and manage server load.
Limited access – Only authorized Helio staff may access files, and only when needed for support, troubleshooting, or system maintenance.
Data aggregation – We may use aggregated, non-identifying metadata (for example, usage counts, popular materials, or performance statistics) to improve the Services and to share general insights with the community. This information will never identify you or your files individually.

7.2 Business Plans

For Business Plans, we provide contractual confidentiality protections designed for professional and enterprise use:

Confidential treatment – We will keep your files and Output confidential. We will not disclose them to third parties except as required to operate the Services, comply with law, or with your written permission.
Deletion within 24 hours – Gcode and related files are deleted within 24 hours after processing.
Restricted access – Only a small, designated group of Helio staff may access Business files, and only in limited cases such as troubleshooting. Where practical, we will notify you if this occurs.
Use limitation – We will not use your files or Output for product development, testing, analytics, or other purposes without your written consent.
Survival of obligations – These confidentiality protections apply during your Business Plan subscription and continue for three (3) years after termination.
Retention for legal purposes – We may retain User Content if required by law, regulation, or to enforce our legal rights.

8. Subscription & Payment Terms

Pricing – The cost of each Plan is shown on our website or order form at the time you subscribe. Prices may change in the future; if they do, we’ll give you advance notice before the new price applies.
Billing cycles – Subscriptions are billed either monthly or annually, depending on the Plan you choose. Payments are due in advance for each billing cycle.
Add-ons – You may be able to purchase additional features or services (“Add-ons”). Add-ons are billed separately and may be charged at the time of purchase or included in your next billing cycle, depending on how they are offered.
Automatic renewals – Unless you cancel, your subscription will automatically renew at the end of each billing cycle (monthly or annually) at the then-current price. You can cancel automatic renewal at any time from your account settings, and the change will take effect at the end of your current billing cycle.
Cancellation – You can cancel your subscription at any time. When you cancel, you’ll continue to have access until the end of your current billing cycle, but you won’t be charged again.
Refunds – All payments are non-refundable, except where required by law. If you cancel partway through a billing cycle, we don’t provide partial refunds or credits for unused time.
Taxes & payment processing – Prices are shown exclusive of any applicable taxes (such as VAT, GST, or sales tax). You are responsible for paying any taxes required in your jurisdiction. We may collect and remit taxes where required by law. Payments are processed by trusted third-party providers (Paddle), and by subscribing you agree to their terms and privacy policies as well. We are not responsible for errors or issues caused by these providers.

9. Service Access & Availability

Service provided “as-is” – We provide the Services on an “as-is” and “as-available” basis. While we aim to provide reliable access with commercially reasonable uptime, we cannot guarantee that the Services will always be available, uninterrupted, or error-free.
Availability & uptime – We make reasonable efforts to keep the Services running smoothly, but we do not promise any specific uptime percentage.
Outages & force majeure – We are not responsible for any unavailability or delays caused by circumstances beyond our control, including but not limited to internet outages, cloud provider failures, cyberattacks, power outages, natural disasters, or other force majeure events.
Fair use & concurrency limits – All use of the Services is subject to our Fair Use Policy (see Section 5). Personal Plans may have stricter limits on concurrency and file size, while Business Plans allow for higher limits and more consistent access.

10. Support

Personal Plans – Support for Personal Plans is available through our Documentation (Wiki) and community channels (e.g., Discord). We do not guarantee individual responses for Personal users.
Business Plans – Business subscribers receive priority email support, with a target response time of within 24 hours on business days, in addition to access to the Wiki and community channels.

11. Termination & Suspension

By you (cancellation) – You can cancel your subscription at any time through your account settings. Cancellation takes effect at the end of your current billing cycle. After that, you will not be charged again, but you will lose access to the Services.
By us (suspension or termination) – We may suspend or terminate your account if: you materially breach these Terms (for example, misuse of the Services, non-payment, or violation of Fair Use rules), your use of the Services creates legal, security, or operational risks for us or other users, or we are required to do so by law or regulation. Effects of termination – When your account is terminated or cancelled:
Your access to the Services will end immediately (except where cancellation allows access until the end of the billing cycle).
For Personal Plans, gcode files will be deleted automatically within 30 days.
For Business Plans, gcode files will be deleted within 24 hours, as set out in Section 7.
We may retain non-identifying metadata (e.g., usage logs, billing records) as needed for legal, security, or business purposes.

12. Disclaimers & Limitations of Liability

No warranties – The Services, including all Output (such as simulations and optimizations), are provided “as-is” and “as-available.” We make no guarantees that the Services or Output will be error-free, uninterrupted, or meet your specific requirements. You are responsible for reviewing and validating your own gcode before printing.
Personal Plans (including Free) – If you use a Personal Plan, including any free access, Helio will have no liability of any kind arising from your use of the Services or reliance on the Output.
No liability for indirect damages – For Business Plans, and to the fullest extent permitted by law, Helio is not responsible for any indirect, incidental, special, consequential, or punitive damages. This includes (but is not limited to) lost profits, lost data, production downtime, wasted materials, or hardware damage.
Cap on direct damages (Business Plans only) – If we are found liable for any claim related to a Business Plan, our total liability will be limited to the amount you paid us for the Services in the twelve (12) months immediately before the claim arose.
Jurisdictional limits – Some jurisdictions do not allow the exclusion of certain warranties or limitations of liability. In those cases, these exclusions and limitations apply only to the extent allowed by law.

13. Governing Law & Dispute Resolution

Governing law – These Terms, and any dispute arising out of or relating to them or the Services, will be governed by the laws of the State of Delaware, without regard to its conflict of laws rules.
Dispute resolution –
- If you have a dispute with us, we encourage you to contact us first to try to resolve it informally.
- If we cannot resolve the dispute, it will be settled through binding arbitration in Delaware, under the rules of the American Arbitration Association (AAA). The arbitration will be conducted in English.
- By using the Services, you agree to waive the right to bring claims in court or to participate in a class action, except where prohibited by law.
Venue (if arbitration doesn’t apply) – If, for any reason, arbitration is found unenforceable, the courts located in Delaware will have exclusive jurisdiction.
Severability – If any part of these Terms is found invalid or unenforceable, the remaining provisions will continue in full force and effect.
Waiver – Our failure to enforce any right or provision of these Terms will not be considered a waiver of that right or provision.

14. Changes to Terms

Right to update – We may update these Terms from time to time, for example to reflect changes in our Services, business practices, or legal requirements.
Notice – If we make material changes, we will provide notice (such as by email or a notice in the dashboard) before the changes take effect. The updated Terms will always show the “last updated” date at the top.
Acceptance – By continuing to access or use the Services after the changes become effective, you agree to be bound by the updated Terms. If you do not agree to the updated Terms, you must stop using the Services.

15. Privacy Policy

Your use of the Services is also governed by our Privacy Policy, which explains how we collect, use, and protect your information. By using the Services, you agree to our Privacy Policy. If these Terms conflict with the Privacy Policy, these Terms will control. (https://www.helioadditive.com/en-us/policies/privacy)

16. User Content Responsibilities & Indemnity

Your rights to upload – You confirm that you have the necessary rights, licenses, and permissions for any User Content you upload or use with the Services.
No infringement – You agree not to upload or use User Content that infringes the intellectual property rights, privacy rights, or other legal rights of others.
Indemnity – You agree to indemnify and hold harmless Helio, its officers, employees, and agents from any claims, damages, or expenses (including reasonable legal fees) that arise from your User Content or your use of the Services in violation of these Terms.

17. Beta Features

From time to time, we may make new or experimental features available as a beta or preview. These beta features may not be fully tested or supported, and we may change or remove them at any time. Beta features are provided “as-is” without warranties of any kind.

18. General Provisions

Assignment – You may not assign or transfer these Terms without our prior written consent. We may assign or transfer these Terms without restriction, including as part of a merger, acquisition, or sale of assets.
Entire agreement – These Terms, together with our Privacy Policy and any additional agreements you accept when purchasing a Plan, are the entire agreement between you and Helio regarding the Services. They replace any prior agreements or understandings, written or oral.
Survival – Sections on Intellectual Property (4), Confidentiality & Data Handling (7), Subscription & Payment Terms (8), Termination (11), Disclaimers & Limitation of Liability (12), Governing Law & Dispute Resolution (13), User Content Responsibilities & Indemnity (16), and this Section (18) will survive termination or cancellation of your account.
Injunctive relief – Despite the arbitration clause, Helio may bring an action in court to stop unauthorized use of its intellectual property or confidential information.
No agency – These Terms do not create a partnership, joint venture, or agency relationship between you and Helio.
Force majeure – We are not responsible for delays or failures caused by events beyond our reasonable control, including natural disasters, internet outages, strikes, or government actions.