Terms of Service

Effective date: September 24, 2026

1. About these Terms

These Terms are an agreement between Zelos, Inc. ("Zelos," "we," "us") and you. They cover our website at zeloscloud.io, our documentation, the Zelos desktop app, the cloud console, the extension marketplace, our SDKs and command-line tools, and our AI features (together, the "Services").

"You" means the person who accepts these Terms. If you accept them for a company or other organization, "you" also means that organization, and you confirm that you have authority to bind it.

You accept these Terms when you create an account, check out, or download or use the Services after we conspicuously notify you that the relevant action signifies agreement to these Terms. If you do not agree, do not use the Services. You must be at least 18 years old and able to enter a binding contract.

If you and Zelos have signed a separate agreement, such as an enterprise agreement or order form, that agreement controls where it conflicts with these Terms. Open-source licenses control for the software they cover. Terms printed on a purchase order do not change this agreement unless we agree to them in writing.

Our Privacy Policy explains how we handle personal information.

2. Accounts and organizations

Some Services require an account and membership in an organization. Keep your account information accurate and your sign-in secure. Tell us at [email protected] if you think someone has used your account without permission. Do not share your sign-in with anyone.

Organization owners and admins control membership, roles, billing, and shared content. You are responsible for the people you invite and the access you give them. Only upload or share content with an organization if you are allowed to. If you leave an organization, the organization keeps the content it owns.

3. The desktop app, SDKs, and CLI

We give you a non-exclusive, non-transferable license to download, install, and use the Zelos desktop app and our other proprietary software on devices you own or control, for your personal use or your organization's internal business. This includes connecting your own hardware and building integrations through our supported interfaces. Your employees and contractors may use it on your behalf, and you are responsible for their use. We keep all ownership of our software and trademarks.

The desktop app is free to download. Cloud plans, AI usage, and cloud storage above your plan's allowance can cost money, as described in section 9. We will show you the price before you buy.

Unless the law or an open-source license allows it, do not sell, sublicense, rent, or redistribute our proprietary software, offer it as a service to others, remove its notices, get around access or payment controls, or reverse engineer it. These limits do not restrict lawful interoperability work.

On macOS and Windows, the app checks our release server for updates and installs them. On Linux, you get updates through our apt repository. Updates can change features and compatibility, so check the release notes before you use a new version with hardware. The installer includes the app, the Zelos agent, and components the app needs to run, including the uv Python package manager. Extensions and notebooks can download more software, such as Python packages, when you use them.

You can uninstall the app at any time. See Uninstall Zelos. Uninstalling does not cancel a subscription or delete your cloud data.

4. Open-source software and extensions

Open-source software we publish is licensed to you under the license that comes with it. Nothing in these Terms limits the rights that license gives you. Check the license of each repository or package; publishing source code does not by itself grant a license. These Terms still apply to our hosted services, even when you reach them through an open-source client.

Extensions may be published by Zelos or by others. An extension published by someone else is provided by its author under the author's own terms and license. A listing in our marketplace does not mean we wrote, reviewed, or stand behind it. Extensions can control hardware and can read or send data as part of what they do. Review an extension before you install it, and do not give it access to data or devices you are not allowed to expose.

We may remove a listing or block an extension when we think it is illegal, infringing, unsafe, or against these Terms. Removing a listing does not end anyone's rights under an open-source license. If you submit an extension, you keep your rights in it, and you let us host, display, and distribute it as its license allows. You must have the right to do so, and you must describe accurately what the extension does and what data it uses.

5. Your content

"Your content" means the traces, recordings, signals, layouts, notebooks, code, files, prompts, and other material you or your organization put into the Services.

You own your content. You give us permission to host, copy, transmit, process, and display it only as needed to run and secure the Services for you, follow your instructions, give you support you ask for, understand how the Services are used as described in our Privacy Policy, and comply with the law. Our service providers may do the same on our behalf for those purposes. For example, session replays in the console and the desktop app can capture content shown on your screen.

We do not sell your content. We keep your non-public content confidential. We only share it with our staff and service providers who need it for the purposes above, with people you choose to share it with, or when the law requires. If the law requires us to disclose it, we will tell you first when we are allowed to and it is practical.

You are responsible for having the right to upload your content and to have us process it. Do not upload data that needs special legal protection, such as health records or payment card data, unless we have agreed to handle it in writing. Keep your own backups. If you need a data processing agreement for personal information in your content, contact us at [email protected].

You can send us feedback and suggestions. We may use them without paying you. That does not give us any rights in your content.

6. AI features

When you use Zelos AI, we send your prompt, the conversation so far, and context from your workspace to AI model providers such as OpenAI and DeepSeek, through Vercel AI Gateway. The app adds context automatically. It can include the names and paths of open traces, signal names, panels and tabs, notebook details, installed extensions, and connected agents. When the AI uses a tool, the tool's results are sent too, and they can include signal values and notebook contents. We may change the models and providers we use. Our Privacy Policy has more detail. Do not send information you are not allowed to share.

Our AI requests tell Vercel AI Gateway to use only providers that do not train models on the prompts they receive. That restriction relies on each provider's own terms and settings.

AI output can be wrong, incomplete, or unsafe, and other users may get similar output. We do not promise that output is accurate, original, or fit for your purpose. As between you and us, you own your prompts, and we give you whatever rights we have in the output generated for you.

Review and test AI output, generated code, notebook changes, and tool actions before you rely on them. The AI and extensions can read data, run code, and take actions available in your environment. You decide what they can access, and you are responsible for the results. A confirmation step, where there is one, does not make an action safe.

7. Hardware and safety

Do not use the Services for safety-critical control without independent verification. Do not rely on the Services, an extension, or AI output as the only safeguard for any action whose failure could cause death, injury, serious property damage, or environmental harm. Before you connect to or command real hardware, use qualified review, proper testing, independent safety systems, and a way to stop unsafe operation. You are responsible for the design, operation, and regulatory compliance of your systems. The Services are not a certified safety system. This section does not limit any liability that the law does not allow us to limit.

8. Acceptable use

Do not:

• break the law, infringe anyone's rights, or share information you are not allowed to share;
• access accounts, networks, hardware, or data without permission, or probe or test our infrastructure without our written permission;
• upload malware, disrupt the Services, or deliberately make hardware behave unsafely;
• get around usage limits, plan restrictions, security controls, or charges;
• pretend to be someone else, misstate who published an extension, or hide what data an extension collects; or
• use the Services in violation of export control or sanctions laws.

Testing your own hardware and systems you are authorized to test is allowed, subject to section 7. Report abuse or infringement to [email protected]. We may investigate and act on reports, but we do not monitor all use of the Services.

9. Plans, billing, and cancellation

Plans. We offer a Free plan, a Team plan, and an Enterprise plan. You buy the Team plan in the console, per seat, billed monthly or annually. Enterprise plans are arranged with us directly and are billed by Stripe invoice or by our own invoice, as your order says. Current prices are shown in the console before you buy. Stripe processes card payments. You authorize us and Stripe to charge your payment method for your subscription and any usage charges.

Renewal. Subscriptions renew automatically for the same period until canceled. For annual plans, we email the organization's owners before the term ends.

Seats. You choose a number of seats when you buy. After that, seats work like this:

• New members may have a free grace period before they need a seat. The grace period is 30 days unless your order says otherwise.
• Monthly plans: at each renewal, your seat count becomes the larger of the number of members who need a seat and the renewal seat count the owner sets. If the owner sets none, the renewal seat count is the number of seats you bought. The change applies from the new month, with no mid-month proration.
• Annual plans: if members who need a seat exceed your seats, we add seats at our regular monthly check and charge for them right away, prorated to the end of the term.
• Seat counts do not go down during a term, and removing a member does not give you a credit. For a self-serve Team plan, an owner can request a lower renewal seat count in the console. Save the request and make any necessary membership changes at least 24 hours before renewal; changes made later may apply only to the following term. The renewal count cannot be lower than the members who need paid seats when renewal is processed. For Enterprise or directly invoiced plans, arrange seat changes with us under your order.
• Some subscriptions created before seat terms existed adjust automatically to the member count. For those, adding a member creates a prorated charge and removing one creates a credit for the unused time.

Enterprise orders may set different seat terms, and those terms apply.

AI credits. AI usage is paid for with credits. Team and Enterprise plans include a monthly AI credit for each seat. Included credit is issued monthly, including on annual plans. It expires 24 hours after that monthly credit period ends, or 72 hours afterward for directly invoiced plans, unless your order specifies different terms. You can also buy credit packs, which do not expire. We use included credit first, then purchased credit, then any promotional credit. We may give new accounts a one-time trial credit. AI usage is charged against your credit at the model cost reported by our AI gateway. When your credit runs out, AI requests stop until you add credit or a new month's credit arrives.

Storage. Each plan includes an amount of cloud storage for traces and published notebooks. Team and Enterprise plans billed through Stripe pay for storage above the included amount at our current overage rate, up to a limit. Free plans and directly invoiced plans stop accepting uploads when they reach their included amount, unless we agree otherwise.

Taxes. Prices do not include taxes. You are responsible for any taxes that apply, other than taxes on our income.

Failed payments. If a payment fails and is not resolved, we may turn off AI features or other paid features until the balance is paid.

Cancellation. An organization owner can cancel a self-serve subscription at any time in the console's billing portal. Cancellation takes effect at the end of the current billing period, and paid access continues until then. Usage charges already incurred remain due. Directly invoiced customers cancel as their order says, or by contacting support. Removing members or uninstalling the app does not cancel a subscription.

EEA and UK consumers. If you buy Services online as a consumer, you normally have 14 days after the contract is made to withdraw without giving a reason. Send a clear statement to [email protected] or Zelos, Inc., 340 Pine St, Suite 100, San Francisco, CA 94104, USA, before the deadline. You may use the form below, but do not have to. We will reimburse payments due back to you within 14 days after receiving your withdrawal, using the original payment method unless you agree otherwise, without a refund fee. If you expressly requested that a service begin during that period and received the required information, you may owe a proportionate amount for service supplied before withdrawal. Any loss of withdrawal rights for fully performed services or immediately supplied digital content requires the separate consent, acknowledgment and confirmation required by law; accepting these Terms alone does not waive those rights. Statutory withdrawal is separate from stopping the next subscription renewal.

Optional withdrawal form: To Zelos, Inc., at the postal or email address above: I/we give notice that I/we withdraw from my/our contract for [service], ordered on [date]. Consumer name(s): [name]. Consumer address(es): [address]. Date: [date]. Signature(s): [only if submitted on paper]. Delete whichever wording does not apply.

Refunds. Subject to the paragraph above, we review refund requests case by case. Email [email protected]. If we end a paid Service for our convenience before a prepaid period ends, we will refund the unused prepaid fees. This section does not limit any refund or cancellation rights you have under law.

Price changes. We may change prices for future periods. We will tell you in advance, before the change affects your renewal, so you can cancel. Price changes never apply to usage you have already incurred.

Tell us about billing errors promptly so we can look into them.

10. Suspension and termination

You can stop using the free Services at any time and cancel paid Services as described in section 9.

We may suspend access where reasonably necessary to prevent harm, illegal use, security threats, or non-payment. Where practical, we will tell you why first and give you a chance to fix the problem. We may end this agreement if you materially breach it and do not fix the breach within 30 days after we notify you, right away if the breach cannot be fixed or the law requires it, or for any reason with at least 30 days' notice.

When this agreement ends, your license to our proprietary software and your access to the cloud Services end, and amounts already owed remain due. Open-source licenses continue under their own terms. Export any content you want to keep before your access ends. After termination, we will give you a reasonable chance to retrieve your content unless the law or a serious security risk prevents it.

Sections that by their nature should continue after the agreement ends will continue, including ownership, confidentiality, payment obligations, disclaimers, limits of liability, indemnity, and disputes.

11. Disclaimers

Except as stated in a separate signed agreement, and to the extent the law allows, the Services, including free software, AI output, and third-party extensions, are provided "as is" and "as available." We disclaim all implied warranties, including merchantability, fitness for a particular purpose, title, and non-infringement. We do not promise that the Services will be uninterrupted or error-free, will work with every device or extension, or that every defect will be fixed. No uptime commitment applies unless we agree to one in writing.

Nothing in these Terms removes consumer rights that the law does not allow to be removed, including rights in the EEA, the UK, Canada, and US states.

12. Limitation of liability

To the extent the law allows, neither we nor our suppliers are liable for indirect, special, incidental, consequential, exemplary, or punitive damages, or for lost profits or revenue, arising from these Terms or the Services, even if we were told they were possible.

If you use the Services for business, our total liability for all claims arising from these Terms or the Services is limited to the greater of US$100 or the fees you paid or owe us for the Services involved in the claim during the 12 months before the first event that gave rise to liability. Multiple claims do not increase this limit.

These limits do not apply to fraud, willful misconduct, or any liability that the law does not allow us to limit, such as liability for death or personal injury caused by negligence in some places. The business limit does not apply to consumers. These limits do not reduce your obligation to pay fees you owe.

13. Indemnity

If you use the Services for business, you will defend Zelos against any third-party claim that your content infringes that party's rights, or that your illegal use of the Services or your breach of section 8 harmed that party. You will pay the resulting damages, settlements, and reasonable legal costs. This does not apply to the extent the claim is caused by our breach, negligence, or misconduct. It does not apply to consumers.

We will tell you about the claim promptly, let you control the defense, and cooperate at your expense. A late notice reduces your obligation only to the extent the delay hurt the defense. You may not settle a claim in a way that admits fault for Zelos, imposes obligations on Zelos other than payment, or leaves Zelos without a full release, unless we agree in writing. We will not unreasonably refuse. We may take part in the defense with our own lawyers at our own cost.

14. Export controls

Both of us must comply with the export control and sanctions laws that apply to us. Do not use, export, or give access to the Services for any prohibited person, country, or end use without the required government authorization. Do not upload export-controlled technical data unless we have agreed in writing to handle it.

15. Governing law and disputes

The laws of the State of Delaware govern these Terms, without regard to its conflict-of-laws rules. The UN Convention on Contracts for the International Sale of Goods does not apply.

Before either of us starts a lawsuit, we will try to resolve the dispute informally. The party with the dispute sends a written notice describing it and the relief wanted, and we then have 30 days to talk it through. This does not prevent either of us from seeking urgent relief, filing when needed to meet a legal deadline, or complaining to a regulator.

Except as stated below, any lawsuit must be brought in the state courts located in New Castle County, Delaware, or the United States District Court for the District of Delaware, and we each agree to those courts' jurisdiction.

Either of us may bring a claim in small claims court if it qualifies. If you are a consumer, you keep the protections of the mandatory laws where you live, including any right to sue in your local courts. These Terms do not require arbitration, and they do not waive class actions or jury trials.

16. Changes to these Terms

We may update these Terms. We will post the new version with a new effective date. For material changes that affect a Service you use, we will give you at least 30 days' notice by email or in the Services, unless a change is required by law or needed to address an urgent security or abuse issue. Changes apply going forward. Where the law requires your agreement to a change, we will ask for it. If you do not agree to a change, stop using the affected Service and cancel before the change takes effect. A separate signed agreement can only be changed as that agreement allows.

17. General

Neither of us may transfer this agreement without the other's consent, except to an affiliate or as part of a merger, reorganization, or sale of all or substantially all of the relevant business, if the new party takes on the obligations. Neither of us is responsible for delays caused by events beyond our reasonable control, but this does not excuse payment for Services already provided. We are independent contractors. If we do not enforce a term, we have not waived it. If a term is found unenforceable, the rest of these Terms still apply. These Terms, together with any order or addendum you agree to, are the entire agreement between us about their subject.

18. Contact

General and legal questions: [email protected] Support and refunds: [email protected]

Notices by mail: Zelos, Inc. 340 Pine St, Suite 100 San Francisco, CA 94104 USA