Terms of service

1. These terms

By creating an account or using Cassius, you agree to these terms and confirm that you are 18 or over. If you do not agree to them, do not use the service. These terms are between you and Cassius Chat LLC, a Washington limited liability company (“we”, “us”). Our privacy policy explains what we do with your information.

2. The service

Cassius is a spatial AI workspace: chat with many AI models, notes, whiteboards and media placed as panes on one infinite floor, operated from the keyboard. Some features are planned and not yet available, such as shared workspaces, an agent that acts in your workspace, image generation, web search and memory; these terms apply to each when it launches.

It is in private beta. It is unfinished, it changes, and features may be added, altered or removed. We may suspend or discontinue the service, in whole or in part, when we need to; section 12 says what happens to a paid plan if we do.

Your use of models is limited. Each plan has a usage allowance, measured by what your requests cost us in five-hour sessions, each beginning with your first request after the last one ended, and in weeks counted from when you created your account, and some models are available only on some plans. When an allowance is used, requests are refused until its session or week ends, at the time shown in the app. Other features, such as storage and the agent, have their own limits by plan. We may change allowances and the models each plan includes, and we may pause model requests for everyone.

3. Your account

You must be at least 18 years old to use Cassius. If we learn that an account belongs to someone under 18, we close it and delete its information, which cancels any subscription it had, and we refund the unused part of its paid period.

One account per person, at an email address you control. You are responsible for keeping your credentials secure and for what is done through your account. Tell us at support@cassius.chat if you believe it has been used without your permission.

You may not use Cassius if you are in a country or region under comprehensive United States sanctions (such as Cuba, Iran, North Korea, and the Crimea, Donetsk and Luhansk regions of Ukraine), or if you are on a United States list of restricted parties, and you may not use it in breach of export or sanctions law.

4. Acceptable use

You agree not to:

• break the law, or infringe anyone’s rights;
• create, upload or ask for sexual content involving anyone under 18, or intimate images of a real person without their consent;
• use the service to harm, harass, threaten or deceive another person, including by impersonating them;
• create malware, plan violence, or seek help with weapons capable of mass harm;
• attack, probe or disrupt the service, or try to reach data that is not yours;
• circumvent the beta gate, our rate limits, usage limits, or any other access control, including by holding several accounts or by driving the service with scripts or bots;
• resell the service, or spend our model budget in ways it was not meant for;
• store health records that law regulates on someone else’s behalf, such as a patient’s, or rely on a model alone for a decision with legal, medical or financial consequences for someone;
• break the usage policy of the provider whose model you use.

We may remove content that breaks these rules, and suspend or end an account that does; section 12 says how. Images are checked automatically for known child sexual abuse material, and we report what we find to the National Center for Missing & Exploited Children, as United States law requires. Where we can, we will tell you why we acted. You can report content or behaviour that breaks these rules, and ask us to look again at a decision about your account, by writing to support@cassius.chat.

5. Plans and payment

Cassius has a free plan and paid plans. Payment is taken by Stripe. Before you pay, checkout shows the plan, its price, how often it is charged and any tax.

A paid plan is a subscription. It renews automatically at the end of each month or year, and you are charged the plan’s price for the next period, until you cancel. You can cancel at any time in Cassius, in settings › billing; your plan stays on until the end of the period you paid for and is not charged again. Deleting your account cancels your subscription at once.

If you subscribed during the private beta at a beta price, you keep that price for as long as your subscription stays active, including when you switch from monthly to yearly. If it ends, a later subscription is at the price of the day. If we change the price of your plan, we will tell you by email at least seven days before your next charge at the new price, and you can cancel before it applies.

We do not give refunds, except where the law requires one or this paragraph promises one. If we close your account because you are under 18, or end your paid plan or the service for any reason other than your breaking these terms, we refund the unused part of the period you paid for. Write to support@cassius.chat and we will look at each request. Where the law of the place you live gives you a right to cancel and be refunded, we honour it. In particular, if you are a consumer in the United Kingdom or the European Union, you may cancel a new subscription within 14 days of buying it by writing to us, and we will refund you within 14 days, less the value of the service you used before you cancelled where the law allows us to keep it.

6. Your content

What you write, place and upload in Cassius is yours, and we claim no ownership of it.

You grant us the licence we need to run the service for you: to store what you add and serve it back to you, to check images against known child sexual abuse material and report a match as the law requires, to transmit what you send to the model provider you chose, to process it as far as returning that model’s answer requires, and, in a workspace you share, to show it to its members. The licence is non-exclusive, limited to operating the service, and it ends when your content is deleted, except for what the law requires us to keep.

You are responsible for what you put into Cassius and for having the right to put it there. If you send us feedback or ideas, we may use them without owing you anything.

7. Model output

Replies, drawings and images a model produces for you are generated by third-party models. As between you and us, they are yours to use, subject to the law and to these terms. A model may give someone else a similar answer, and output may not be protected by copyright.

Model output may be wrong, incomplete or offensive. We do not verify it or endorse it, and it is not professional advice of any kind. Check anything that matters before you rely on it, and you are responsible for how you use it.

8. Copyright complaints

If you believe content in Cassius infringes your copyright, send a notice to our designated agent: Copyright agent, Cassius Chat LLC, a Washington limited liability company, at support@cassius.chat. Under the Digital Millennium Copyright Act, the notice must include your physical or electronic signature; the work you say is infringed; the material you say infringes it, and enough to let us find it; your address, telephone number and email; a statement that you believe in good faith the use is not authorized by the owner, its agent or the law; and a statement, under penalty of perjury, that the notice is accurate and that you are the owner or authorized to act for the owner.

We remove or disable the material and tell the person who added it. They may send a counter-notice with their signature, the material removed and where it was, a statement under penalty of perjury that they believe in good faith it was removed by mistake or misidentification, their name, address and telephone number, and their consent to the jurisdiction of the federal court for their district (or, outside the United States, any district where we may be found) and to accept service from the person who sent the notice. We then restore the material in 10 to 14 business days unless that person tells us they have gone to court. A notice or counter-notice that knowingly misrepresents can make its sender liable for damages. We close the accounts of people who repeatedly infringe.

9. Our property

Cassius, including the software, the interface, the design and the name, is ours. These terms grant you no rights in any of it beyond the right to use the service. You may not copy, modify, reverse engineer or make derivative works from it, except where the law says you may. Open-source parts are licensed under their own terms, listed at licenses.txt.

10. Disclaimers

To the fullest extent the law allows, Cassius is provided as it is and as it happens to be available, with no warranty of any kind, express or implied, including any warranty of merchantability, fitness for a particular purpose, or non-infringement. Where the law gives you rights that cannot be excluded, such as a consumer’s right in the United Kingdom to a service provided with reasonable care and skill, you keep them.

It is beta software. It may lose your work, refuse to load, or change under you. When you are signed in we store your workspaces, conversations, notes and whiteboards on our servers, and the files you add; files you open while signed out stay in your browser. Keep anything you care about somewhere else as well.

11. Limitation of liability

To the fullest extent the law allows, we are not liable for any indirect, incidental, special, consequential or punitive damages, nor for any loss of data, profits, revenue or goodwill, arising out of your use of Cassius.

To the fullest extent the law allows, our total liability for any claim relating to the service is limited to the greater of what you paid us for it in the twelve months before the claim, or one hundred United States dollars.

Nothing in these terms limits liability for death or personal injury caused by negligence, for fraud, or any other liability, or any right you have as a consumer, that the law does not allow to be limited. Where the law limits these clauses, they apply as far as it permits and no further.

12. Suspension and ending

You may stop using Cassius at any time, and delete your account from the command palette or by writing to support@cassius.chat.

We may suspend or end your access if you break these terms, if the law requires it, or to protect the service or other people. If we end a paid plan for any reason other than your breaking these terms, or discontinue the service, we will tell you in advance where we can and refund the unused part of the period you paid for, as section 5 says. Sections 6, 7, 8, 9, 10, 11 and 13 survive the end of these terms.

13. Governing law and disputes

These terms are governed by the laws of the State of Washington, United States, without regard to its conflict-of-laws rules. Any dispute arising from them goes to the state or federal courts for the county of our registered office in Washington. There is no arbitration clause, and nothing here stops you joining a class action.

If you are a consumer, you keep the protection of the mandatory laws of the country, state or province where you live, and you may bring a claim in its courts where that law gives you the right to.

14. Changes to these terms

We will change these terms as the product changes. When we do, we post the new version on this page and update the date under its title. If a change matters to you, we tell you in Cassius or by email before it takes effect, and if you pay for a plan you can cancel before it does. Using Cassius after a change takes effect is how you accept it.

If any part of these terms cannot be enforced, the rest still applies. We may transfer these terms to a company that takes over Cassius, and we will tell you if we do.

15. Accessibility

We want Cassius to be usable by everyone. The workspace is built to be driven from the keyboard, and most of what you can do has a key or a place in the command palette. We aim to meet the Web Content Accessibility Guidelines 2.2 at level AA. Cassius has not been audited by anyone else, and it does not fully meet them yet: the whiteboard and some media panes are hard or impossible to use with a screen reader, and placing or drawing shapes, lines and text on a whiteboard needs a pointer, unless a chat draws them for you.

If something stops you from using Cassius, write to support@cassius.chat with the page and the assistive technology you use, and we will look for a way to help.

16. Contact

Cassius Chat LLC, a Washington limited liability company. Email support@cassius.chat.