Terms of use
Beta terms · Last updated 9 October 2026
Who we are
Ka is a service of InterfaceDelta, Inc., a Delaware corporation (“we”). These terms are between you and us. By signing up, or by using Ka, you agree to them. How we handle your information is in our Privacy policy.
A beta
Ka is in beta. It is unfinished, it will change, and parts of it may stop working or be taken away. We may end the beta, or Ka itself, after telling you at least 30 days before. Before we do, you will be able to download your writing.
Free, for now
Ka is free while it is in beta. If we ever ask for payment, we will tell you first, with the price, and you will be able to download your writing whether or not you pay.
Your account
You must be at least 18 years old. One account is for one person, and the email address must be yours. You sign in with a link and a code sent to that address, so keep your email account safe: anyone who can read it can sign in as you. Tell us at once if you think someone has.
Your writing
What you write and bring in is yours. You give us only the permission we need to run Ka for you: to store it, to show it to you, and to send parts of it to the companies named in the Privacy policy, so that Ka and plain can read it. That permission ends when you delete it. Bring in only writing you have the right to keep, such as your own. We do not sell your writing, show it to advertisers, or use it to train models, and we ask every company we send it to not to train on it either.
Ka is an AI
Ka and plain are AI: their lines and answers are written by a language model, within rules we wrote. They can be wrong, and they do not know you as a person does. Ka is not a therapist, a doctor, a lawyer or any other professional, and nothing it or plain says is professional advice. Do not rely on it for decisions about your health, your money or the law. If you are in danger or thinking of harming yourself, contact your local emergency services, a crisis line or a qualified professional now.
Using Ka fairly
Do not use Ka to break the law; to get into anyone else's account, or into our systems; to overload Ka, or probe it in ways that could harm it or the people who use it; to store or make material that sexualises children; or to sell or share access to it.
Ending your account
You can delete your account at any time, at the foot of Ka's memory page. It deletes your writing and everything Ka keeps about it at once, as How Ka keeps your words describes. We may suspend or close an account that breaks these terms. Unless the law or someone's safety prevents it, we will tell you why and let you download your writing first.
No warranty
As far as the law allows, Ka is provided “as is” and “as available”, without warranties of any kind, express or implied, including the implied warranties of merchantability, fitness for a particular purpose and non-infringement. Ka is in beta and may contain bugs. We do our best to keep it running and your writing safe, and we keep backups, but we cannot promise it will always be available or free of errors. Keep your own copy of anything you cannot lose: you can download all of it at any time.
Liability
As far as the law allows, we are not liable for indirect or consequential losses, such as lost profits or lost data, and our total liability to you for anything to do with Ka is limited to the greater of what you paid us in the twelve months before the claim and 100 US dollars. While Ka is free, that is 100 US dollars. Nothing here limits liability that the law does not allow us to limit, such as for death or personal injury caused by our negligence, fraud, or gross negligence. If you live in the European Union or the United Kingdom, we are responsible for foreseeable loss or damage we cause by breaking these terms or by failing to use reasonable care, and the limits above apply only as far as your law allows.
Changes
We may change these terms. When a change matters, we will say so in Ka at least 14 days before it takes effect, unless the law requires a change sooner. If you do not agree, you can download your writing and delete your account before then.
Disputes and governing law
If something goes wrong, write to us first: most things can be put right that way, and we will answer within 30 days. These terms are governed by the laws of the State of Delaware, without regard to its rules on conflicts of law, and any dispute goes to the state or federal courts located in Delaware. If you live in the European Union or another place whose consumer laws protect you more, those protections still apply to you, and you may bring a claim in the courts where you live.
General
These terms and the Privacy policy are the whole agreement between you and us about Ka. If a part of them cannot be enforced, the rest still applies. If we do not enforce a part at once, we can still enforce it later. We may pass these terms to a company that takes over Ka, and will tell you first; your rights under them do not shrink by it. Translations are for convenience; the English text governs.
Contact
ka@interfacedelta.com, or by post: InterfaceDelta, Inc., 1435 Walnut St, Ste 501 #118, Philadelphia, PA 19102, USA.