Terms of Service.

Seufic keeps a record of you so its answers fit you. That record is your profile, the memories you approve, your documents, your artifacts and your conversations. Your conversations are encrypted on your device before they are stored. You can export the whole of it or delete the whole of it at any time, without asking us.

Seufic is not paid for by advertising, and your information is not for sale. There is no advertising in the product, no profile of you built to choose it, and no partner we share or sell your information to. We collect what an account needs to work and nothing we would only need if we were in the data business.

Your chats are encrypted and never used for training. Neither is your profile, your memories, your documents or your artifacts.

A model you link with your own API key is between you and its provider. Your browser sends the conversation to that provider and gets the reply back, the provider bills you directly, and Seufic pays nothing toward it and takes no cut. Seufic isn’t responsible for how that provider stores, uses or trains on your data. We do not write, control or check what that model says, and we are not responsible for it. Section 7.2 says the rest.

The built-in models are free on every account. Each account gets a weekly allowance of credits, set out in section 8.

Accepting these terms is a condition of holding an account. Where the law where you live gives you more rights, section 5.7 applies as well.

This summary doesn’t replace the sections below. Sections 4 and 5 decide what happens to your information, and if this summary and section 5 disagree, section 5 governs.

By creating a Seufic account, or by using Seufic in any way, you agree to these Terms of Service, including the privacy terms in section 5. If you do not agree, do not create an account and do not use the service. Where these terms say "we", "us" or "Seufic", they mean the operator of the Seufic service; where they say "you", they mean the individual holding the account.

Sign-up asks you to accept these terms explicitly, and the account is not created until you do. We record the version you accepted and the date you accepted it.

If you are in the European Economic Area, the United Kingdom or Switzerland, the processing we need in order to run Seufic for you rests on our contract with you and on our legitimate interests, and it happens either way. Nothing you put into Seufic is used for training, so there is no consent to give or withdraw for it (5.3).

If you are using Seufic on behalf of an organization, you confirm you are authorized to accept these terms for that organization.

You must be at least 16 years old, or the minimum age of digital consent where you live if that age is higher. You must be legally able to enter into a binding agreement, and you must not be barred from using the service under any applicable law.

If we learn that an account belongs to a child under 13, we close it and erase what we hold.

One account belongs to one person. Do not share your account credentials, and do not let anyone else use your record as though it were theirs.

You are responsible for keeping your password safe. You can also turn on two-step verification with an authenticator app in Settings, and we recommend it. Your password, and that app if you use one, open your entire record, including your encrypted conversations. Treat them as the key to the whole thing, and use a password you do not use anywhere else.

Tell us promptly if you believe someone else has gained access to your account.

You keep every right you already have in the profile details, memories, documents, artifacts, projects and conversations you put into Seufic. We claim no ownership of them, and nothing in these terms transfers them to us.

What the assistant writes for you is yours as well. To the extent we hold any rights in a reply, we assign them to you. Someone else who asks something similar may get a similar answer, and theirs belongs to them.

You grant us a worldwide, non-exclusive, royalty-free license to host, store, copy, transmit, index and process your content, in order to: provide the features you asked for; personalize what the assistant is told before it answers you; and keep the service safe. We never use it to train models (5.3). Nothing in this license lets us sell your content, share it with an advertiser, or use it to build a profile for anyone.

Nothing you put into Seufic is ever shown to another account.

This license lasts as long as we hold the content and ends when the content is erased.

You confirm you have the right to put into Seufic whatever you put into it, including anything about another person, and that our doing the things listed above with it will not infringe anyone else's rights.

5.1 What we hold

Only what an account needs to work: things you entered yourself, or things a server must keep to stay secure.

• Account information: your email address, your password (kept only as a hash we cannot reverse), your handle, your display name, the two-step verification your account uses, and which browsers the account has been signed in on so you can sign one out.
• Your record: your profile, the memories you have approved, the documents and notes you upload, the artifacts the assistant makes for you, anything you attach to a question, and the text we extract from files so the assistant can read them.
• Your conversations: every question you ask, every file you attach to one, and every answer you get, so you can return to them on any device. Messages and chat titles are encrypted on your device before they are stored, and the key that opens them is handed only to your own signed-in session.
• Your encryption keys, in sealed form: the public key your conversations are sealed to, and the private key, sealed under a secret our server keeps apart from the database.
• Files: the files you attach to messages and the artifacts you save. They are held in a private storage bucket, encrypted at rest but not end to end, and reached only through short-lived links signed for your account.
• Your settings: the language you want answers in, the model you leave the picker on, whether earlier conversations are recalled and how long chats are kept. They follow the account, so they are the same on every device.
• Credits: the credits your account spends each week, and any promotional credits you claimed, with what is left of them.
• Usage: one row for each message you send and each reply you get, holding which model answered, the number of characters and tokens, and how long the reply took. Never the text. It is what the Usage section draws, on every device you sign in on.
• Request logs: we keep none of our own. Our hosting provider sees the IP address and user agent that arrive with a request and keeps its own logs under its own policy.
• Visits: a count of visits to each page of seufic.com, made by our hosting provider's analytics without cookies and without any identifier that follows you from one visit to the next. It holds the page, the site that sent you, the kind of browser and the country, and nothing you type. We count visits; we don't track you.
• Feedback: what you write to [email protected], the date it arrived and the address it came from. It is not linked to your account.
• Feedback survey: if you answered the feedback survey that used to be in the app, your answers and the date, linked to your account so the credits it gives reach you, and erased with the account.
• Mailing list: if you join it, your email address, the page you joined from and the date. It is not linked to your account and is used only to email you news about Seufic. Resend, which sends those emails, holds the address too.
• Reported replies: the text of a reply you choose to report, with the reason and any note you add. It is not linked to your account.
• Projects: the sealed name of each project, which chats are in it, the files you keep there, and a fingerprint of each claim you tick off, linked to your account.
• Seufic Daily: if you play while signed in, your progress on each day’s puzzles and whether you solved them, linked to your account to keep your streaks. Only you see it.

What we do not collect: no device fingerprint (the bot check in 5.5 is Cloudflare’s, and we receive only its result), no precise or approximate location, no record of what you press or how long you stay, no contacts, no data bought or received from anyone else about you, and no inferences about your age, income, beliefs, health or intentions. If it is not on the list above, we do not have it.

5.2 What we do with it

• Running the service: answering you, drawing your record, keeping you signed in, and sending the emails an account needs.
• Personalizing answers: giving the assistant your profile and your approved memories before it answers a question.
• Security, abuse and law: detecting fraud, abuse and attacks, enforcing section 6, and meeting our legal obligations.
• Writing to you when you asked us to: a reply to feedback that came with an address, and news about Seufic if you joined the mailing list.
• Corporate: accounting, audit, legal claims, and evaluating or completing a merger, financing, acquisition or sale of the business, subject to 5.5.

We use it for nothing else: no advertising, no analytics that follow a person, and no training (5.3).

5.3 Your chats are never used for training

Your chats are encrypted and never used to train, fine-tune or evaluate any model. There is no setting that changes this. Your profile, memories, documents, artifacts, account information and settings are read to answer you and for nothing else.

Nobody at Seufic opens your chats, though our server holds the secret that could, as 5.8 explains. We only see a chat if you send it to us yourself through feedback or a report.

5.4 What we never do

• We do not show advertising in Seufic, and we are not paid by advertisers.
• We do not sell, rent, license or share your information with anyone for their own purposes. Under the US state privacy laws, we do not "sell" or "share" personal information and have not done so.
• We do not build a profile of you from your behavior, and we do not infer your interests, your demographics, your beliefs or your intentions.
• We do not track you across other sites or apps, and we do not let anyone else track you through Seufic. There are no third-party cookies, pixels or advertising identifiers in the product.
• We do not use your chats, your profile, memories, documents or artifacts to train anything.

5.5 Who else sees it

• Service providers: the companies whose systems Seufic runs on. The kinds below are the only ones. The Transparency page sets out what each one sees.
  • Hosting: Cloudflare hosts the site, the server between you and the model, and the count of visits in 5.1. It also runs Turnstile, the invisible bot check on signing up, signing in and resetting a password, which reads signals from your browser such as your IP address and a fingerprint of the encrypted connection, only to tell people from bots. Seufic receives a pass or a fail. Cloudflare’s Turnstile Privacy Addendum governs what Turnstile collects.
  • Database, sign-in and file storage: Supabase holds sign-in, your record, your encrypted conversations and your files, encrypted at rest. Our providers hold the keys to that storage layer, so this is not end-to-end encryption; your conversations are also sealed with a key Supabase does not hold. This hosting is temporary: we plan to move to a more secure database that we run ourselves.
  • Compute for our models: Cloudflare Workers AI runs our models while they write a reply. What is sent to it is processed for that work, under Cloudflare’s terms for that service and on our instructions.
  • Email delivery: the emails an account needs, such as confirming an address or resetting a password, and the mailing list, which Resend sends and for which it holds only the addresses on the list.
  • Web search: when an answer needs current facts, a short search query written from your latest message goes from our server to a search provider, which receives nothing else about you.
  • Public records and data: when a question names a company, a country, a study, an amount of money, a medicine, a treatment or a website, our server sends only that name, code, amount or address to the public source that holds it: OpenAlex, the US SEC, GLEIF, UK Companies House, Wikidata, the World Bank, Frankfurter, the US FDA, ClinicalTrials.gov, USAspending.gov or the registry that holds the website’s domain. When a page an answer relies on is gone, its address goes to the Internet Archive to find a saved copy.
  • Password check: when you choose a password, your browser sends the first five characters of its SHA-1 hash to Have I Been Pwned to learn whether it appears in known leaks. The password and the rest of the hash never leave your device.
  Each is bound by contract to use what it is given only for the work we hired it for. If you want to know which company fills a role, write to [email protected] and we will tell you.
• Providers you link with your own key: if you chat on an API key of your own, what that turn needs goes from your browser to that provider, under its terms and privacy policy, not ours. Seufic isn’t responsible for how that provider stores, uses or trains on your data. Section 7.2 says what that means.
• Other users: nobody. Seufic has no way to hand a conversation, a file or any other part of your record to another account, and no other account can read it.
• Law and safety: where the law requires it, where a court or a valid legal process orders it, or where it is needed to protect somebody's life or safety. We answer only a request that is valid where it was issued, and we hand over the narrowest part of an account that satisfies it. We tell you first unless the law forbids it or a life is at risk. Where we find material that sexually exploits a child, US law requires us to report it to the National Center for Missing & Exploited Children, and we do.
• A buyer: if the business is merged, financed, acquired or sold, whoever takes it on, bound by this section as it stands.

5.6 Sensitive information

Where the law where you live treats a category of information as sensitive, meaning health, origin, belief, orientation, and the others article 9 of the GDPR lists, we use it to answer you and for nothing else.

5.7 Your controls and your rights

In Settings, at any time and without asking us:

• Export: your whole record in one file, immediately.
• Clear: your memories, or your conversations, each on its own.
• Delete: your account and everything in it, on the timetable in section 9.

If any of these will not work, email [email protected] from the address on your account; we action it within 15 business days and write back when it is done.

Whatever law applies where you live, you can ask us to:

• tell you what we hold about you, what we do with it, and who we gave it to;
• give you a copy of it, in a portable form. Settings does this immediately, without asking us;
• correct anything that is wrong;
• delete it. Settings does this too, on the timetable in section 9;
• withdraw a consent you gave, without that affecting what was lawful before you withdrew it.

We will not discriminate against you for exercising any of these: no feature withheld, no different quality of service. An authorized agent may act for you if they can show they are authorized. If we refuse a request we will say why, and you may complain to your data protection authority or attorney general.

Global Privacy Control and "Do Not Sell or Share". We do not sell or share personal information, so there is nothing for the signal or the request to switch off. We honor both anyway, by continuing not to.

5.8 Security, and what the assistant reads

Your record is scoped to your account at the database level, so no other account can read your rows. Your messages and chat titles are encrypted in your browser before they are stored, and the database refuses to store a new one that is not. Files you attach, and artifacts the assistant produces, are held in a private area only your account can open and are reachable only through short-lived signed links. Traffic is encrypted in transit and data is encrypted at rest.

To be clear: your stored conversations are sealed with a key that our server keeps sealed under a secret of its own, apart from the database, and opens only to hand to your own signed-in session. That means we could open them, so this is not end-to-end encryption, and we do not open them for anything else. Our server also reads a conversation while it writes a reply, because a model cannot answer what it cannot read, and your password reaches our sign-in provider each time you sign in, which keeps only a hash of it. Everything else, meaning your account, profile, memories, documents, artifacts and files, is encrypted at rest with keys our providers hold, so it is not end-to-end encrypted. The person who runs Seufic can read that part, and does so only as far as running, fixing and securing the service needs. We would rather say so here than imply a guarantee we cannot make.

The assistant itself sees your profile, the memories you have approved, the conversation in front of it, and the files you attach to it. It cannot save a memory on its own. It may suggest one, and only you can approve it.

To generate replies, your profile and approved memories are sent to the model with the conversation, for the length of that request. The models are open-weight ones we choose and configure ourselves: Qwen3.8 27B, Google Gemma 4 26B, Meta Llama 4 Scout, Mistral Small 3.1 24B and Z.ai GLM-4.7-flash, served on Cloudflare Workers AI. The companies that made them are not on the other end of your conversation. Cloudflare processes the request while it is running, under its own terms for that service and on our instructions.

In a voice conversation, what you say is turned into words by a speech model that runs on your own device. The model is downloaded once from us and kept by your browser, and no sound leaves your device, not to us and not to the company that makes your browser. Only the words are saved, as the message you sent, and from there they are treated like anything you typed. A reply in a voice conversation is read aloud by your own browser, using a voice installed on your device when one is available, so the reply is never turned into sound on our side.

5.9 Apps you connected before

Seufic no longer connects to other apps. On October 31, 2026 we removed Notion, GitHub, Google Calendar and Google Drive and deleted every token they had issued us. If you connected one, you can also remove Seufic in that app’s own settings.

5.10 How long we keep it

Your record is kept for as long as your account exists, and then on the timetable in section 9. A deactivated account is held for 31 days and then permanently erased. A deleted account is erased at once. Either way every stored file goes with it.

• A conversation you delete: erased from the database at once. Files attached to it are erased within 30 days. Our database provider keeps short-lived backups of the whole database on its own schedule, and those roll over.
• Request logs: we keep none. Our hosting provider keeps its own on its own schedule.
• Feedback: up to two years from the day it arrived, or sooner if you ask.
• Mailing list: until you leave it, which you can do at once from the Contact page. That removes the address from Resend as well.
• Records the law requires us to keep: for as long as the law requires. If a court orders us to preserve something, deleting that part waits until the order ends, and we tell you unless the order forbids it.

5.11 Where it is held

Seufic is operated from the United States, and your information is processed there and in the countries our providers operate in. The database is hosted by Supabase for now. We plan to move to a more secure database that we run ourselves. Where the law requires a transfer mechanism for information leaving your region, we rely on the European Commission's standard contractual clauses or an equivalent.

If you would rather a fact never left your device, do not put it into your record.

You agree not to:

• upload or store content that is illegal where you or we operate;
• upload sexual content involving minors, or any content depicting non-consensual sexual activity;
• upload another person's private or sensitive information without their consent;
• use Seufic to harass, defraud, impersonate or endanger anyone;
• attempt to break, overload, probe or circumvent the service's security, rate limits or safety screening;
• resell, sublicense or provide the service to third parties as your own; or
• use automated means to extract the service beyond what an ordinary account would do.

Images attached to a message pass through an automated safety screen before they are kept. An image that fails is rejected and not saved. The screen is automated and imperfect in both directions.

If someone brings a claim against us because of what you put into Seufic in breach of this section or of the law, you agree to cover our reasonable costs of answering it. Where the law where you live does not allow this, it does not apply to you.

If you believe something in Seufic infringes your copyright, write to [email protected] with the subject Copyright. Say what the work is, where it appears and how to reach you. We act on a complete notice promptly, and we close the accounts of repeat infringers.

7.1 Replies from any model

The assistant produces text using a language model. It can be wrong, out of date, or confidently mistaken, including about facts drawn from your own record. Check anything that matters.

Seufic is not a medical, legal, financial, tax or mental-health service, and nothing it produces is professional advice. Do not rely on it for decisions that need a qualified professional, and do not use it in an emergency.

Every reply is generated automatically. Nobody at Seufic writes, reviews or approves a reply before you see it, and a reply is not a statement by us or a view we hold. You decide what to do with a reply, and you are responsible for that decision, including checking a reply before you rely on it, publish it, send it to someone or act on it. To the fullest extent the law allows, we are not responsible for the content of any reply or for what follows from using it.

7.2 Models you link with your own API key

In Settings you can add an API key of your own from Google, OpenAI, Anthropic, xAI, Mistral AI or OpenRouter and chat with that provider's models inside Seufic. When you do, these terms apply as follows.

• Your agreement is with the provider. The key belongs to an account you hold with that provider, and using it puts you under the provider's terms, usage policies and privacy policy. Seufic is not a party to that agreement. We are not the provider's reseller, sublicensee, agent or partner, we do not buy access to its models on your behalf, and we do not sit between you and it.
• The provider bills you, not us. Every request on your key is charged by the provider to your account with it. Seufic never pays for those requests, never receives any part of what you pay, and never sees your bill. We are not responsible for any charge on your key, whatever its cause, including heavy use, a price change by the provider, or someone else using a key that has leaked. Set a spending limit with the provider if you want one.
• Your key stays in your browser. It is kept encrypted in your browser, and requests on it go from your browser to the provider. We never keep a copy of any key, so we cannot recover, revoke or reset it for you. You are responsible for keeping it safe and for revoking it with the provider if you think it has been exposed.
• You must be allowed to use the key. Use only a key you are entitled to use, and use it only in ways the provider's terms allow. A key issued to an employer, a client or another person needs their permission. Section 6 applies to these chats as it applies to any other.
• We are not responsible for what that model says. The reply is written by the provider's model, which we did not build, do not train, do not run and cannot change. Our own safety screening does not apply to it, and we do not monitor, filter, edit or endorse it. Any harm, loss, claim or liability arising from that reply, including a claim that it is inaccurate, offensive, unlawful or infringes someone's rights, is between you and the provider. Who owns the reply, and what you may do with it, is set by the provider's terms.
• The provider decides what happens to what it receives. To write a reply, the model is given what any Seufic model would be given for that turn: the conversation, your profile and your approved memories. Before each turn our server reads the conversation once to add your record and any web results, then hands the request back to your browser to send. The provider handles what it receives under its own privacy policy and data terms, which may let it log, keep, review or train on it. Seufic isn’t responsible for how the provider of that key stores, uses or trains on your data. On our side, the conversation and any artifacts are stored in your account, encrypted like any other conversation, and a conversation that has used your own key is never used to train any model.
• No promise that it works. A provider can change, limit, price or withdraw a model at any time, reject a key, or fail. We do not promise that any provider or model will be available in Seufic, and we may change or stop supporting one.
• Not affiliated. Google, OpenAI, Anthropic, xAI, Mistral AI and OpenRouter are not affiliated with Seufic and do not endorse it. Their names and logos appear only to show which provider a key belongs to.

If someone brings a claim against us because you used your own key in breach of the provider's terms or of the law, you agree to cover our reasonable costs of answering it, as section 6 sets out for content. Where the law where you live does not allow this, it does not apply to you.

Claude is a trademark of Anthropic, PBC. Gemini is a trademark of Google LLC. OpenAI, Grok, Mistral, OpenRouter, Z.ai, GLM, Qwen, Gemma, Llama and Mistral Small are trademarks of their owners. Seufic is not affiliated with or endorsed by any of them.

We aim to keep Seufic running and to give notice before removing something you depend on, but we do not promise uninterrupted availability. Features may be added, changed or withdrawn. We may impose reasonable limits on upload size or request rate.

Files. A file you attach can be up to 12 MB, with up to 20 MB and six files in one message. A file you save to Artifacts can be up to 50 MB.

Credits. Each account gets 700 credits a week, refilled every Monday at midnight UTC. One answer from a built-in model spends 1 credit, and a longer task such as making a file, a fact check or a question in Research mode spends 5. A Team spends 1 credit for every answer its models write, as set out in the Help Center. Unused weekly credits do not carry over. We may offer promotional credits that you claim in Settings; each offer says when it must be claimed and spent, and promotional credits have no cash value and cannot be transferred. Credits never apply to models you use on your own API key.

If we ever discontinue the service, we will give you a reasonable opportunity to export your record first.

You can close your account from the Danger zone in Settings at any time, without asking us. You choose one of two ways, and confirm it with your email address and password.

Deactivate.

• your account is closed immediately and you are signed out;
• your record is retained, unreadable to anyone else, for 31 days;
• during those 31 days you can reactivate simply by signing in again and confirming;
• after 31 days the account and everything in it (profile, memories, documents, artifacts, conversations, your chat keys, every stored file) is permanently erased and cannot be recovered by you or by us. The stored copies of your files are erased by the same process.

Delete. The account and everything in it, listed above, is permanently erased straight away. You cannot sign back in, and nothing can be recovered by you or by us.

Either way, a short account record stays behind: your email address, your handle, your display name, the details in your profile and a count of what the account held. Only Seufic can read it. It is removed 3 months after the day you deactivated or deleted the account.

If you want a copy of your record, export it before you close the account.

One thing does not go with the account: records the law requires us to keep.

We may suspend or terminate an account that breaches these terms, that puts other people or the service at risk, or that we are legally required to act on. Where it is lawful and safe to do so, we will tell you why and give you a chance to export your record.

Except where the law does not allow it, Seufic is provided "as is" and "as available", without warranties of any kind, whether express, implied or statutory, including any implied warranty of merchantability, fitness for a particular purpose, accuracy, or non-infringement.

We make no promise about replies from any model, and none at all about a model you link with your own API key, its provider, or the provider's service. Those are provided to you by the provider under its own terms.

To the fullest extent permitted by law, we are not liable for indirect, incidental, special, consequential or punitive damages, nor for lost profits, lost data or lost goodwill, arising out of your use of Seufic. Nor are we liable for anything arising from a model you link with your own API key: what it writes, what you do with it, what its provider charges you, or how its provider handles what it receives. Our total liability for any claim relating to the service is limited to the greater of the amount you paid us for the service in the twelve months before the claim, or fifty US dollars.

Nothing in these terms excludes liability that cannot lawfully be excluded, including for death or personal injury caused by negligence, or for fraud. Some jurisdictions do not allow certain exclusions, so parts of this section may not apply to you.

We may update these terms. If a change materially affects your rights, we will give you notice in the product before it takes effect, and the "last updated" date at the top of this page will change. Continuing to use Seufic after a change takes effect means you accept the updated terms. If you do not accept them, delete your account.

A change that widens what we hold under 5.1, or that adds a purpose under 5.2, is a material change and gets that notice. Where the law requires fresh consent for a new purpose, which in the EEA, the UK and Switzerland it does, we ask again instead of treating your continued use as consent, and information already held is not used for the new purpose until you say yes.

Seufic is operated by Seufic, a California sole proprietorship ("we", "us", "our"). These terms are an agreement between you and that business. Where these terms limit our liability or disclaim warranties, it is that business's liability that is limited.

These terms, and any dispute arising out of them or out of your use of Seufic, are governed by the laws of the State of California, without regard to its conflict-of-laws rules. The United Nations Convention on Contracts for the International Sale of Goods does not apply.

Talk to us first. Before starting any formal proceeding, email [email protected] describing the problem and what you want done about it. Most things end here, and we will give you 30 days to work it out with us before either side escalates.

If that does not resolve it, the state and federal courts located in California have exclusive jurisdiction, and you and we each consent to venue there. You may always bring a qualifying claim in small claims court instead. Nothing here prevents either side from seeking an injunction to stop misuse of the service or of intellectual property.

If you are a consumer resident in the EU, the UK or another place whose law gives you the right to bring proceedings in your local courts or under your local consumer law, this section does not take that right away from you.

If any part of these terms is found unenforceable, the rest stays in force. Our not enforcing a provision is not a waiver of it. You may not transfer your rights under these terms without our consent; we may transfer ours in connection with a merger, acquisition or sale of assets, subject to the privacy commitments above.

These terms, together with any notices published in the product, are the entire agreement between you and us about Seufic.

Questions about these terms, or about your record, can go to [email protected].

Anything about privacy goes to [email protected], which is read by a person rather than a form. That covers what we hold, a copy of it, a correction or a deletion.