Terms of service

Agreeing to these terms

By creating an account or using Thezis, you agree to these Terms, our Privacy policy, and our Refund policy. If you do not agree, do not use Thezis.

You must be at least 13 years old. If you are under 18, use Thezis with a parent or guardian’s permission.

What Thezis is

Thezis is an AI writing assistant. You choose the sources, ask for a sentence, paragraph, or section at a time, and edit everything. Thezis does not check for plagiarism and does not detect AI writing.

Your account

Give us a real email address you can access. You are responsible for activity on your account, so keep your sign-in links private and do not share your account. Tell us if you think someone else has used it.

Your content and AI output

You own your documents, sources, and the writing you produce. You give us permission to host, process, and display them, and to send them to the AI and research services described in the Privacy policy, only to run Thezis for you.

Only add sources you are allowed to use.

Thezis writes text with AI models. Output can be wrong, incomplete, or similar to what others receive. As between you and us, you own the output you keep, to the extent the law allows. You are responsible for checking it.

Academic integrity, accuracy, and professional advice

You are responsible for following the rules of your school, instructor, or publisher on AI use and citation. Some courses do not allow AI help, and Thezis cannot know. The Changes panel records what the AI wrote and what you edited, so you can show your process.

Check every citation and claim against its source. AI can misread a source or attach a citation to the wrong claim.

Thezis is not a substitute for professional judgment. Do not rely on it for medical, legal, or clinical decisions. For nursing and health papers, confirm facts against current guidelines.

Using Thezis responsibly

Do not use Thezis to:

• break the law or infringe anyone’s rights, including by uploading content you have no right to use;
• upload malware, or try to access other people’s accounts or data, or to break or probe our security;
• copy, resell, or scrape Thezis or its output with automated tools, or reverse engineer it;
• get around limits, for example by opening several accounts for free usage;
• create harassing, deceptive, or harmful content;
• overload or disrupt the service.

Plans and billing

Free plan. Free includes 10 chat messages to the assistant in total, which do not reset, and 10 MB of storage, with no card. On Free, the assistant can write up to 1,000 words into each document. Every word it writes counts, including text you later reject or ask it to redo. Free also has a limited amount of search and assistant usage that does not reset. Titles, outlines, source details, and citation checks do not count as messages. Writing by hand and exports are free.

Plus. Plus is $25 a month, or $120 a year. It includes search, assistant usage, and 5 GB of storage, with limits that reset every month. Settings › Billing shows how much you have used. When you reach a limit, search or the assistant stops until it resets, unless you have extra usage.

Pro. Pro is $50 a month, or $240 a year, with 20 GB of storage. Search and the assistant are unlimited on Pro, subject to fair use: each month you can use up to three times Plus's monthly limit, far more than students use. If you reach it, search and the assistant pause until your next billing month.

Extra usage. On Plus you can buy extra usage from $5. It is used only after your plan's limit runs out, covers search and assistant usage, and does not expire.

Auto-charge. Auto-charge is available on Plus and is off unless you turn it on. When it is on, we charge your saved card for more extra usage when you run out, up to the monthly amount shown in Settings › Billing. Turn it off there at any time. If a charge fails, or you leave Plus, we stop charging.

Renewal. Plus and Pro renew automatically at the same price each period until you cancel. Cancel any time in Settings › Billing with Manage billing. You keep your plan until the end of the period you paid for, and you are not charged again.

Prices and taxes. If we change the price, we will tell you before it applies to your next renewal. Taxes may be added where the law requires.

Payments. Stripe processes payments, and its terms apply to them.

Refunds. See the Refund policy.

Changes and ending your use

We may change, add, or remove features and limits. We will try to give notice of changes that matter.

You can stop using Thezis at any time and delete your account in Settings › Account. We may suspend or end your access if you break these Terms, put others at risk, or do not pay. When practical, we will tell you why.

Our rights

Thezis, including its software, design, and brand, belongs to us. You may not copy or reuse them except as these Terms allow. If you send us feedback, we may use it without owing you anything.

Disclaimers and limits of liability

Thezis is provided “as is” and “as available.” We do not promise that it will be uninterrupted or error-free, that AI output or citations will be accurate, or that your school will accept your work. Nothing here limits rights you have under consumer law that cannot be waived.

To the extent the law allows, we are not liable for indirect, incidental, special, consequential, or punitive damages, or for lost grades, academic penalties, data, or profits. Our total liability for any claim is limited to the greater of what you paid us in the 12 months before the claim or $50.

Problems and changes to these terms

If something goes wrong, email ghazi@thezis.com first. We will try in good faith to resolve it within 30 days.

We may update these Terms. We will post the new version here and change the date above, and we will tell you in the app or by email about significant changes. If you keep using Thezis after a change, you accept it.