Terms of Use

Effective date: September 30, 2026

These Terms of Use (the "Terms") are a legal agreement between you and Highlight Labs LLC, a California limited liability company and the maker of RapidHarness ("Highlight Labs", "we", "us" or "our"). They govern your access to and use of the RapidHarness desktop software (the "Software"), the RapidHarness cloud library, account and billing services, the website at https://rapidharness.com, and all related updates, documentation and support (together with the Software, the "Service").

1. Who May Use the Service

The Service is a professional engineering tool intended for business and educational use. You must be at least 13 years old to use it. If you are under 18, you may use the Service only under the supervision of a parent, guardian, or a school or other organization (such as a teacher or club adviser) that agrees to these Terms on your behalf and is responsible for your use of the Service. If you use the Service on behalf of a company or other organization, you represent that you are authorized to bind that organization to these Terms, and "you" means both you and that organization. You may not use the Service if you are barred from doing so under the laws of the United States or any other applicable jurisdiction, including if you are on a U.S. government restricted-party list or located in a country subject to a comprehensive U.S. embargo.

2. Accounts, Teams and Partners

Your account

You must provide accurate, current and complete information when you register and keep it up to date. You are responsible for keeping your password confidential and for all activity under your account. Tell us promptly at customer-service@rapidharness.com if you believe your account has been accessed without authorization.

Teams

Every account belongs to a team. All members of a team can access the team's library and the designs in it. Team administrators can invite and remove members and manage the team's subscriptions and billing details. If you join a team using an email address provided by your employer or another organization, that organization's administrators may control your access and the designs you create for the team. When a member is removed, the designs and version history they created remain with the team, including the name and email address recorded on each version they saved.

Partners and external sharing

You may choose to share folders or designs with another team as a partner, with "View Only" or "Can Edit" permission, or to transfer ownership of designs to a partner. Once shared, the partner can view the content, print it or save it as PDF or Excel files, and, where its permission and plan allow, copy or change it. Anything a partner prints or saves stays with the partner even after you stop sharing, and a transfer of ownership moves the design out of your library permanently. We are not responsible for what a partner does with content you choose to share, and you should have your own agreements (such as a non-disclosure agreement) with any partner as needed.

3. Licenses and Subscriptions

License to use the Service

Subject to your compliance with these Terms and payment of any applicable fees, we grant you a limited, non-exclusive, non-transferable, non-sublicensable, revocable license during your subscription term to download, install and use the Software, and to access and use the Service, for your internal business purposes within the limits of your plan.

Named users

Each paid license is assigned to one named user, identified by email address. A license may not be shared between people, and a single license may not be used on more than one computer at the same time. We may use technical measures, such as comparing the computer names recorded when designs are saved, to detect simultaneous use, and we may limit functionality when it is detected. Team administrators may reassign a license when a team member leaves by contacting us.

Free plan and trials

We may offer a free plan or a free trial of paid features. Free plans and trials are subject to the limits we publish, may be changed or discontinued at any time, and are provided without any warranty or support commitment. When a trial ends, your account reverts to the free plan unless you purchase a subscription.

Beta and preview features

Features we identify as beta, preview, early access or similar are provided for evaluation, may be incomplete or unreliable, and may be changed or withdrawn without notice. They are provided "AS IS" without any warranty and are excluded from any support commitment.

Updates

The Software checks for and installs updates automatically so that it stays compatible with the cloud library. You agree to receive these updates. Some older versions of the Software may stop working with the Service once they are no longer supported.

4. Your Content

You own your Content

"Content" means the designs, drawings, libraries, parts, files, images, notes and other data that you or your team upload to, create in, or store with the Service. As between you and us, you (or your organization) own your Content. We do not claim ownership of it.

License you give us

You grant us a worldwide, non-exclusive, royalty-free license to host, store, copy, transmit, display, back up and process your Content only as needed to provide, secure, maintain and support the Service for you, to comply with law, and as otherwise described in our Privacy Policy. This license ends when your Content is deleted from our systems as described in Section 15.

Confidentiality of your Content

We treat your Content as your confidential information. We will not sell your Content, make it public, or use it to train artificial intelligence or machine learning models. Our personnel access your Content only (a) at your request or with your permission, such as to answer a support request; (b) as needed to maintain, secure or troubleshoot the Service; (c) through automated systems that operate the Service; or (d) as required by law, in which case we will, where legally permitted, try to give you notice first so you can seek protection. We use reasonable administrative, technical and physical safeguards, at least as protective as those we use for our own confidential information, to protect your Content. We limit access to employees and service providers who need it to operate the Service and who are bound by confidentiality obligations.

Your responsibilities for Content

You represent and warrant that:

• you own or have all rights, licenses and permissions needed to upload and use your Content with the Service, including any drawings, datasheets or specifications provided by your customers or suppliers;
• your Content, and our use of it as permitted by these Terms, will not infringe or misappropriate anyone's intellectual property or other rights or violate any law or any confidentiality obligation you owe to others; and
• you will not upload Content that you are prohibited from storing with a commercial cloud provider, including as described in Section 10.

Keep your own copies

We take reasonable steps to protect and back up the Service, but the Service is not a substitute for your own records management. You are responsible for keeping your own copies of any drawings and manufacturing documents you need for your own business, regulatory, quality or contractual record-keeping requirements, for example by saving them as PDF or Excel files or printing them.

5. Acceptable Use

You agree not to, and not to allow anyone else to:

• use the Service in violation of any applicable law or regulation, including export control, sanctions and intellectual property laws;
• copy, modify, translate or create derivative works of the Software, or decompile, disassemble or reverse engineer it or attempt to discover its source code, algorithms or data formats, except to the limited extent applicable law expressly permits despite this restriction;
• sell, rent, lease, sublicense, resell or provide the Service to third parties as a service bureau or on a time-sharing basis, or share login credentials;
• remove or alter any proprietary notices, or circumvent or disable any license, usage-limit, security or access-control mechanism;
• access the Service by automated means (such as scripts, bots or scrapers), or harvest parts library data or other data from the Service, except through features we provide for that purpose;
• interfere with or disrupt the integrity or performance of the Service, probe, scan or test its vulnerability without our written permission, or attempt to gain unauthorized access to it or its related systems;
• upload viruses, malware or other harmful code;
• use the Service to build a competing product, or to benchmark it for publication without our written consent;
• impersonate any person, or misrepresent your identity or affiliation; or
• send spam or other unsolicited communications through the Service, including partner or team invitations.

If you discover a security vulnerability, please report it to customer-service@rapidharness.com. We will not pursue good-faith researchers who report promptly, avoid harming users or data, and give us reasonable time to fix the issue before disclosure.

6. Our Intellectual Property

The Service, including the Software, its source and object code, algorithms, user interface, documentation, templates, curated parts libraries and all related intellectual property, is owned by Highlight Labs or its licensors and is protected by copyright, trade secret, trademark and other laws. The Service is licensed, not sold. Except for the limited license in Section 3, no rights are granted to you, and all rights not expressly granted are reserved. "RapidHarness", our logos and related names are trademarks of Highlight Labs LLC and may not be used without our prior written permission. Other names and marks shown in the Service belong to their respective owners.

Drawings, bills of materials, wire lists and other documents that the Service generates from your Content belong to you, subject to our rights in the underlying Software, templates and formatting, which we license to you to use for your business purposes, including after your subscription ends.

Feedback

If you give us suggestions, ideas or other feedback about the Service, we may use it for any purpose without obligation or compensation to you. Feedback does not include your Content, and we will not identify you as its source publicly without your permission.

Open-source and third-party components

The Software includes third-party and open-source components that are licensed under their own terms. Where those terms conflict with these Terms, those terms govern for that component.

7. Fees, Billing, Automatic Renewal and Cancellation

Fees

Paid plans are billed at the prices shown on our pricing page, at checkout, or in a quote or order form we issue to you (an "Order"). If an Order conflicts with these Terms, the Order controls for that purchase. Fees are in U.S. dollars and do not include taxes. You are responsible for all sales, use, value-added, withholding and similar taxes, other than taxes on our income. Your bank or card issuer may charge its own fees, such as foreign transaction fees.

Payment

Card payments are processed by our payment processor, Stripe. We do not receive or store your full card number. By providing a payment method, you authorize us and Stripe to charge it for all fees for your subscription, including renewals, and any applicable taxes. If we invoice you, payment is due within 30 days of the invoice date unless the invoice or Order states otherwise.

Refunds

Except where required by law or stated in an Order, fees are non-refundable, and we do not provide refunds or credits for partial billing periods or unused licenses. Plan upgrades take effect immediately and are prorated as described at the time of upgrade.

Late or failed payment

If a payment fails or an invoice is overdue, we will notify you and may retry the charge. If payment is not received after notice, we may cancel your paid subscription. Unless your account is suspended or terminated under Section 15, when a paid subscription ends (for example because you cancel it or we cancel it for non-payment), the users it covered revert to the free plan. Your designs remain in your library and can still be viewed, and harness, system and device designs can still be printed and saved as PDF or Excel files, but the free plan's limits apply, so some designs, including designs that partners share with you, may become read-only until you resubscribe.

8. Third-Party Services and Parts Data

The Service includes or links to data, content and services provided by third parties, including electronic component and parts information sourced from third-party catalogs and distributors (such as Nexar/Octopart), part images hosted by third parties, payment processing by Stripe, and video tutorials hosted on YouTube. Third-party parts data, including part numbers, specifications, ratings, dimensions, images, pricing, availability and lifecycle status, is provided "AS IS", may be incomplete, outdated or wrong, and must be verified against the manufacturer's current datasheets before use. We are not responsible for third-party services or content, and your use of them may be subject to their own terms and privacy policies.

9. Engineering Responsibility and High-Risk Uses

10. Export Controls and Regulated Data

You will comply with all U.S. and other applicable export control and sanctions laws, including the Export Administration Regulations (EAR), the International Traffic in Arms Regulations (ITAR) and regulations administered by the Office of Foreign Assets Control, in your use of the Service. The Service is hosted on commercial cloud infrastructure in the United States, and we do not represent that the Service meets the requirements for storing or processing ITAR- or EAR-controlled technical data, Controlled Unclassified Information, classified information, or data subject to DFARS 252.204-7012, CMMC, FedRAMP, HIPAA or PCI-DSS. You must not upload such data unless you have determined, on your own responsibility, that doing so complies with all laws and contractual obligations that apply to you, and you are solely responsible for any authorizations required. You also must not use the Service to store sensitive personal information such as government identification numbers, financial account numbers or health information.

11. Support and Communications

We provide email support as described for your plan. Support responses, including any engineering suggestions, are provided for convenience and are subject to Sections 9 and 13. We may use automated tools, including artificial intelligence, to help us provide support. You agree that we may send you notices and other communications electronically, by email or within the Service, and that electronic communications satisfy any legal requirement that a communication be in writing.

12. Indemnification

To the fullest extent permitted by law, you will defend, indemnify and hold harmless Highlight Labs and its affiliates, and their respective members, managers, officers, employees, contractors, agents, licensors, successors and assigns, from and against any third-party claims, and related losses, damages, liabilities, judgments, settlements, costs and expenses (including reasonable attorneys' fees), arising out of or relating to: (a) your Content; (b) any product, harness, assembly or system designed, manufactured, sold or used by you or your customers with the help of the Service or its Outputs; (c) your violation of these Terms or of any law, including export control laws; or (d) your infringement or misappropriation of any third party's rights. We will notify you of any claim for which we seek indemnification, allow you to control its defense (provided you do not settle any claim that imposes an obligation on us without our consent), and reasonably cooperate at your expense.

13. Disclaimer of Warranties

TO THE FULLEST EXTENT PERMITTED BY LAW, THE SERVICE, THE SOFTWARE, ALL OUTPUTS AND ALL THIRD-PARTY DATA ARE PROVIDED "AS IS" AND "AS AVAILABLE", WITH ALL FAULTS AND WITHOUT WARRANTIES OF ANY KIND. HIGHLIGHT LABS AND ITS LICENSORS AND SUPPLIERS EXPRESSLY DISCLAIM ALL WARRANTIES, WHETHER EXPRESS, IMPLIED, STATUTORY OR OTHERWISE, INCLUDING ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, NON-INFRINGEMENT, ACCURACY AND QUIET ENJOYMENT, AND ANY WARRANTIES ARISING FROM COURSE OF DEALING OR USAGE OF TRADE. WE DO NOT WARRANT THAT THE SERVICE WILL BE UNINTERRUPTED, SECURE OR ERROR-FREE, THAT OUTPUTS WILL BE ACCURATE, COMPLETE OR SUITABLE FOR MANUFACTURING OR ANY OTHER PURPOSE, THAT CONTENT WILL NOT BE LOST OR CORRUPTED, OR THAT DEFECTS WILL BE CORRECTED. NO ADVICE OR INFORMATION, WHETHER ORAL OR WRITTEN, OBTAINED FROM US OR THROUGH THE SERVICE CREATES ANY WARRANTY NOT EXPRESSLY STATED IN THESE TERMS.

14. Limitation of Liability

TO THE FULLEST EXTENT PERMITTED BY LAW:

(a) IN NO EVENT WILL HIGHLIGHT LABS, ITS AFFILIATES, OR ITS OR THEIR MEMBERS, MANAGERS, OFFICERS, EMPLOYEES, AGENTS, LICENSORS OR SUPPLIERS BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, EXEMPLARY OR PUNITIVE DAMAGES, OR FOR ANY LOSS OF PROFITS, REVENUE, BUSINESS, GOODWILL OR ANTICIPATED SAVINGS, LOSS OR CORRUPTION OF DATA, COST OF SUBSTITUTE GOODS OR SERVICES, PRODUCTION DOWNTIME, SCRAP, REWORK, PRODUCT RECALL OR FIELD REPAIR COSTS, OR BUSINESS INTERRUPTION, ARISING OUT OF OR RELATING TO THESE TERMS, THE SERVICE OR ANY OUTPUTS, WHETHER IN CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY, PRODUCT LIABILITY OR ANY OTHER THEORY, EVEN IF WE HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

(b) OUR TOTAL AGGREGATE LIABILITY ARISING OUT OF OR RELATING TO THESE TERMS, THE SERVICE AND ANY OUTPUTS WILL NOT EXCEED THE GREATER OF (i) THE AMOUNTS YOU ACTUALLY PAID US FOR THE SERVICE IN THE TWELVE (12) MONTHS BEFORE THE EVENT GIVING RISE TO THE LIABILITY, AND (ii) ONE HUNDRED U.S. DOLLARS (US$100).

(c) THESE LIMITATIONS APPLY EVEN IF A REMEDY FAILS OF ITS ESSENTIAL PURPOSE, AND THEY ARE AN ESSENTIAL BASIS OF THE BARGAIN BETWEEN YOU AND US; OUR PRICES WOULD BE SUBSTANTIALLY HIGHER WITHOUT THEM.

Nothing in these Terms excludes or limits any liability that cannot be excluded or limited under applicable law, such as liability for fraud, or for death or personal injury caused by gross negligence or willful misconduct. If you are a consumer in a jurisdiction whose laws do not permit certain of these exclusions or limitations, they apply to you only to the extent permitted.

15. Term, Suspension and Termination

These Terms apply from the time you first accept them or use the Service until your account is closed.

By you. You may stop using the Service and cancel your subscription at any time as described in Section 7. To close your account and request deletion of your personal information, email customer-service@rapidharness.com.

By us. We may suspend or terminate your access to all or part of the Service (a) if you materially breach these Terms and, where the breach can be cured, do not cure it within 15 days after notice; (b) immediately and without prior notice, if we reasonably believe it is necessary to prevent harm to the Service, other users or third parties, or to comply with law; (c) if payment is overdue as described in Section 7; or (d) for any other reason on at least 60 days' notice, in which case we will refund any prepaid fees for the unused portion of your subscription.

Your Content after termination. Before your account is closed, you should print any drawings and manufacturing documents you need, or save them as PDF or Excel files on your own computer. After termination we may delete your Content, except that designs remain available to the other members of your team while your team is active. Deleted Content may remain in our backups until they are overwritten in the ordinary course, during which time it remains protected under these Terms. If your team remains active after you leave it, the designs you created for it remain part of the team's library.

Sections 4 (Keep your own copies), 5, 6, 7 (for amounts owed), 8, 9, 10, 12, 13, 14, 15, 17, 18 and any other provision that by its nature should survive, will survive termination.

16. Changes to the Service and to These Terms

We continually improve the Service and may add, change or remove features. If we remove a material feature of a paid plan during your subscription term, we will notify you and, if you cancel because of the change, refund any prepaid fees for the unused portion of your term.

We may update these Terms from time to time. If a change is material, we will notify you by email or in the Service at least 30 days before it takes effect, unless the change is required by law or relates to a new feature, in which case it may take effect sooner. The updated Terms apply from their effective date. If you do not agree to the changes, you may cancel before they take effect; continuing to use the Service after that date means you accept them. Changes will not apply retroactively, and changes to Section 17 will not apply to any dispute of which we had actual notice before the change was posted.

17. Dispute Resolution; Binding Arbitration; Class Action Waiver

PLEASE READ THIS SECTION CAREFULLY. IT AFFECTS YOUR LEGAL RIGHTS, INCLUDING YOUR RIGHT TO FILE A LAWSUIT IN COURT.

Informal resolution first. Before starting any arbitration or court proceeding, you and we each agree to try to resolve any dispute, claim or controversy arising out of or relating to these Terms or the Service (a "Dispute") informally. The party raising the Dispute must send the other a written notice describing it and the relief sought: notices to us go to customer-service@rapidharness.com with a copy by mail to the address in Section 19, and notices to you go to the email address on your account. If the Dispute is not resolved within 60 days after the notice is received, either party may begin arbitration.

Binding arbitration. Except as provided below, all Disputes will be resolved by final and binding individual arbitration administered by the American Arbitration Association ("AAA") under its Commercial Arbitration Rules or, if you are an individual using the Service primarily for personal, family or household purposes, its Consumer Arbitration Rules, in each case as modified by this Section. The arbitration will be conducted by a single arbitrator, in English, in Los Angeles County, California, or by video conference or written submissions if the parties agree or the rules allow. The arbitrator, and not any court, decides all questions of arbitrability, except that a court decides questions about the enforceability of the class action waiver below and about the mass arbitration procedures. Judgment on the award may be entered in any court of competent jurisdiction. The Federal Arbitration Act governs this Section.

Exceptions. Either party may (a) bring an individual claim in small claims court if it qualifies, and (b) seek injunctive or other equitable relief in court to protect its intellectual property or confidential information, or to stop unauthorized use of the Service. Any claim for public injunctive relief that applicable law does not permit to be waived or arbitrated will be severed, decided in court under Section 18, and stayed until the individual claims have been arbitrated.

Class action and jury trial waiver. YOU AND WE EACH AGREE THAT DISPUTES WILL BE RESOLVED ONLY ON AN INDIVIDUAL BASIS, AND NOT AS A PLAINTIFF OR CLASS MEMBER IN ANY PURPORTED CLASS, CONSOLIDATED, COLLECTIVE OR REPRESENTATIVE PROCEEDING. TO THE EXTENT ANY DISPUTE PROCEEDS IN COURT, YOU AND WE EACH WAIVE THE RIGHT TO A JURY TRIAL. If the class action waiver is found unenforceable as to any claim, that claim must be severed and decided in court under Section 18, and the remainder will be arbitrated.

Mass arbitration. If 25 or more similar demands for arbitration are filed against us by or with the help of the same or coordinated counsel, the AAA's Mass Arbitration Supplementary Rules will apply, and the parties agree that the demands may be administered and decided in batches as those rules provide.

Fees. Payment of arbitration fees is governed by the AAA rules. If you are an individual and cannot afford the filing fee, we will consider in good faith a request to pay it. The arbitrator may award fees and costs as the rules and applicable law allow.

30-day right to opt out. You may opt out of this agreement to arbitrate by emailing customer-service@rapidharness.com within 30 days after you first accept these Terms, stating your name, account email address and that you opt out of arbitration. Opting out does not affect any other part of these Terms. If you opt out, Disputes will be resolved in court as described in Section 18.

Time limit. To the extent permitted by law, any Dispute must be brought within one (1) year after the claim arises, or it is permanently barred.

18. Governing Law and Venue

These Terms and all Disputes are governed by the laws of the State of California, and applicable U.S. federal law, without regard to conflict-of-laws rules. The United Nations Convention on Contracts for the International Sale of Goods and the Uniform Computer Information Transactions Act do not apply. For any Dispute that is not subject to arbitration, you and we consent to the exclusive jurisdiction of, and venue in, the state and federal courts located in Los Angeles County, California. If you are a consumer residing in the European Union or the United Kingdom, you also keep the protection of the mandatory provisions of the law of your country of residence and may bring proceedings in its courts.

19. General

Entire agreement. These Terms, together with any Order and the documents they refer to, are the entire agreement between you and us about the Service, and supersede all prior agreements and understandings about it. Any purchase order or similar document you issue is for your administrative convenience only, and terms in it that add to or conflict with these Terms have no effect.

Assignment. You may not assign or transfer these Terms or your account without our prior written consent. We may assign these Terms in connection with a merger, acquisition, reorganization or sale of all or substantially all of our business or assets, on notice to you. Subject to the foregoing, these Terms bind and benefit the parties and their permitted successors and assigns.

Force majeure. Neither party is liable for any delay or failure to perform (other than payment obligations) caused by events beyond its reasonable control, such as natural disasters, epidemics, war, terrorism, civil unrest, labor disputes, government action, or failures of the internet, utilities or third-party hosting providers.

U.S. Government rights. The Software and documentation are "commercial computer software" and "commercial computer software documentation" under 48 C.F.R. § 2.101. U.S. Government users acquire them only with the rights granted to all other users under these Terms, in accordance with 48 C.F.R. § 12.212 and, for Department of Defense users, 48 C.F.R. §§ 227.7202-1 through 227.7202-4.

Notices. We may send notices to the email address on your account or post them in the Service. Legal notices to us must be sent by email to customer-service@rapidharness.com and by mail to Highlight Labs LLC, Attn: Legal, 6 Liberty Square #2026, Boston, MA 02109, USA.

Other terms. If any provision of these Terms is held unenforceable, it will be enforced to the maximum extent permissible and the rest of these Terms will remain in effect. Our failure to enforce a provision is not a waiver of it. The parties are independent contractors, and there are no third-party beneficiaries of these Terms except the indemnified parties in Section 12. Headings are for convenience only, and "including" means "including without limitation".

20. Contact Us

Highlight Labs LLC
6 Liberty Square #2026
Boston, MA 02109, USA
customer-service@rapidharness.com