LEGAL

Privacy Policy

Last updated: November 6, 2026

This policy explains what information CircuitProver collects when you use circuitprover.com, the live demo and the schematic review service, what we do with it, how long we keep it and the choices you have.

1. Who we are

CircuitProver ("we", "us") is run by an individual based in the Republic of Korea. We decide how your information is used and are responsible for it.

Privacy contact (개인정보 보호 담당): CircuitProver, hello@circuitprover.com. We reply to privacy questions and requests within 30 days, usually much sooner.

2. What we collect

When you upload files for a review

• Your email address, so we can send you the report and ask about parts we cannot identify.
• Your files: the netlist, the schematic PDF and any datasheets you add, on the upload form or by replying to our email. Design files can contain personal information, such as an engineer's name in the title block.
• What you type in the upload chat, such as part numbers or questions about your files.
• Technical information: your IP address, which we use in hashed form to limit abuse, and the time of the upload.
• How you found us: the name of the site that sent you (for example reddit.com, not the full address) and any tag in our link (such as ?ref=), so we know which posts bring reviews. Your browser keeps these in session storage until you close the tab.

When you buy a review

• Your order details from our reseller (see section 4): what you bought, the amount, your country and your email address. We never see your full card number.

When you create an account

An account is optional. You don't need one to get a review.

• Your email address and password. Your password goes to Google's Firebase Authentication service. We never see it or store it ourselves.
• If you continue with Google: the email address, name and profile picture address that Google shares with us, and your Google account ID.
• Account records: when the account was created, when you last signed in and whether your email address is confirmed.
• Technical information: Firebase Authentication uses your IP address and browser details to protect sign-up and sign-in from abuse.
• On your device: the log-in and account pages keep you signed in by storing a sign-in token in your browser until you log out. Other pages on this site do not read or store it.

When you use the live demo

• The questions you type and the answers we return, a random conversation ID, the time, and your IP address.
• The conversation is also kept in your browser's session storage so it survives a page reload. It is cleared when you close the tab.

When you visit the website

• Our hosting providers keep standard server logs (IP address, browser type, pages requested) to run and protect the site.
• We count visits with Cloudflare Web Analytics. It records the page you view, the site that sent you, your browser and device type, your country and how fast the page loaded. It uses no cookies and does not follow you across other sites.
• How you use the page: which sections you scroll to, which links and buttons you press, whether a demo question was answered, and the steps of an upload (the file format we detected, the check results, whether an email address was entered, whether you submitted). Each visit gets a random ID that is created when the page opens and is not stored on your device. We do not record file names or contents, what you type, your email address or your IP address. We use this to find where the site is confusing and fix it.
• We do not use advertising or analytics cookies.

3. How we use it

• To provide the review you ask for: checking that your files are complete and readable, reviewing the design against the parts' datasheets, asking about parts we cannot identify or whose datasheet we cannot find, and emailing you the report.
• To provide your account: signing you in, confirming your email address, helping you reset your password and deleting the account when you ask.
• To operate, maintain and secure the service: limiting abuse, diagnosing problems with file processing, and keeping the service available.
• To improve the website: seeing where visitors stop or get stuck, using the page-use records above.
• To see which of our posts and links bring reviews, using the site name and link tag above.
• To improve the live demo: reading demo questions and answers to make the answers better.

Datasheets you send us are used in your review. We may also keep them in our datasheet collection and use them when we review another customer's board with the same part. We never give anyone else your file or a link to it, and we never say who sent it: their report names only the document and page. Email us if you want a datasheet you sent removed from the collection.

We do not sell your information, we do not use it for advertising, and we never use your design files, or the datasheets you send us, to train AI models.

If you are in the European Economic Area or the United Kingdom, our legal bases are: performing the service you request (reviews), our legitimate interests in running a secure and working service and improving the demo, and your consent where we ask for it.

4. AI processing and service providers

We use the following providers to run CircuitProver. They process information on our behalf and only for these purposes.

• Cloudflare, Inc. (United States): runs the upload service and the demo, stores uploaded files, forwards email sent to our contact address, counts website visits, and keeps logs.
• Google LLC (United States), Gemini API:
  • File checks and the upload chat: excerpts of your files and your chat messages are processed through Google's paid Gemini API. Under Google's terms for paid services, this content is not used to train Google's models.
  • Live demo: demo questions are processed through the Gemini API under Google's terms. Please do not type personal or confidential information into the demo.
• Google LLC (United States), Firebase Authentication: stores your account, handles sign-in including "Continue with Google", and sends account emails such as email confirmation and password reset. It processes this data in the United States.
• Google LLC (United States), Gmail: our mailbox. Email you send to hello@circuitprover.com, including replies and attachments such as datasheets, is stored there.
• Standard reviews are produced by an AI model running on computers we operate in the Republic of Korea. Your files reach them through Cloudflare.
• Anthropic, PBC (United States), Claude API: produces Premium reviews, and any other paid review we run on it, such as a board our own system can't finish. It receives your files and the parts' datasheets, checks each pin and writes the report. Under Anthropic's commercial terms, it may not train its models on this content. It deletes this content within 30 days, unless its safety systems flag it, in which case it can keep it for up to 2 years. Free reviews, including past ones, may also be produced with Claude, with model training turned off.
• AIEEV Inc. (Republic of Korea), Air API: when the Gemini API is unavailable or slow, an AI model on AIEEV's Air API does the same work in its place. It answers live demo questions and upload chat messages and checks uploaded files. It then receives the same content Gemini would: demo questions, your upload chat messages with a short summary of your upload, and excerpts of your files for the file check. AIEEV has agreed not to use this content to train AI models.
• Resend, Inc. (United States): sends upload confirmations and reports by email.
• Dodo Payments Inc. (United States): sells our reviews as our reseller and Merchant of Record. When you buy, it collects your name, email address, billing country and payment details, and handles payment, currency conversion, tax, invoices, fraud checks and refunds under its own privacy policy.
• Amazon Web Services (Republic of Korea, Seoul region): hosts the website.

5. International transfers

We are based in the Republic of Korea, and some of our providers are in the United States. When information from the European Economic Area, the United Kingdom or Switzerland is transferred, we rely on the safeguards the law provides, such as adequacy decisions and the European Commission's Standard Contractual Clauses.

6. How long we keep it

• Uploaded files (including any datasheets you add), the upload chat and your report: the copy in our upload service is deleted automatically within 7 days of upload. The copy we use to produce and support your review is kept for 12 months after your review, so we can answer questions, review a revised board and handle refunds, and is then deleted. Email us to have it deleted sooner.
• Order records: kept for as long as tax law requires.
• Emails about your review (upload confirmation, questions, the report email and your replies, including any datasheets you attach): kept in our mailbox for up to 12 months to answer support requests, then deleted.
• Datasheets you send that we add to our datasheet collection: kept until you ask us to remove them.
• Your account: kept until you delete it, or until 24 months after your last sign-in. Once an account is deleted, Google removes it from its live and backup systems within 180 days.
• IP addresses logged by Firebase Authentication: kept by Google for a few weeks.
• Live demo questions, answers and IP addresses: deleted automatically after 30 days.
• How you used the page (sections, clicks and upload steps): deleted automatically after 30 days.
• Hashed IP addresses used to limit abuse: kept for up to 24 hours.

7. Security

Files are encrypted in transit and at rest, access is limited to what is needed to run the service, and files are deleted on the schedule above.

8. Your rights

You can ask us to access, correct or delete your information, to restrict or object to its use, or to receive a copy of it. Email hello@circuitprover.com, and we will reply within 30 days. You can also ask us to delete your files at any time. You can delete your account yourself at any time on your account page.

If you are in the EEA or the UK, you may complain to your local data protection authority. If you are in Korea, you may contact the Personal Information Protection Commission.

Do Not Track. We do not track visitors across other websites, so the site does not change its behaviour when your browser sends a Do Not Track signal.

9. Children

CircuitProver is a tool for engineers and is not meant for anyone under 16. We do not knowingly collect information from children.

10. Changes to this policy

If we change this policy, we will post the new version on this page with a new date. If a change is significant, we will also say so on the home page.

11. Contact

CircuitProver is run by an individual based in the Republic of Korea. Email: hello@circuitprover.com.