Amfion Privacy Policy

Effective date: November 11, 2026 · Last updated: November 11, 2026

This Privacy Policy explains how Viacheslav Sergeev, doing business as Amfion (“Amfion,” “we,” “us”), collects, uses, shares and protects information when you use amfion.co, app.amfion.co, our software, documents and related services (together, the “Service”). By using the Service you agree to this Policy. If you do not agree, do not use the Service.

1. Who we are

Amfion is a tool that helps real-estate investors and renovators write, price, review and export scopes of work for residential properties. We are the controller of the personal information described here. Contact: Viacheslav Sergeev, doing business as Amfion, by email at slava@amfion.co.

2. Information we collect

Information you give us

Account information: your email address, name if you provide one, and sign-in details handled by our authentication provider (including Google account identifiers when you sign in with Google). We do not see or store your Google password.
Content you provide: property addresses, descriptions of planned work, budgets, notes, chat messages, questions, feedback, ratings and any other text you enter.
Files you attach: photos, PDFs, contractor bids, inspection reports, listings, prior scopes of work, spreadsheets and any other documents, including their contents and metadata (file names, dates, camera data embedded in photos).
Communications: emails and messages you send us.

Information we collect automatically

Usage data: pages viewed, features used, buttons clicked, text typed into the Service, time spent, referral source, and the sequence of your actions.
Session recordings: we may record how you interact with the Service (mouse movement, clicks, scrolling, typing, screen contents) to understand usability and fix problems.
Device and connection data: IP address, approximate location derived from it, browser type and version, operating system, screen size, language, cookie and device identifiers.
Error and performance data: crash reports, stack traces, request timings and the state of the application when something fails, which may include content you were working on.
Cookies and similar technologies: see section 7.

Information from others

Authentication providers (for example Google) send us your email address and basic profile data when you sign in through them.
Address and map providers return address suggestions and location data for addresses you type.
Property-data providers: we may obtain public-record or third-party data about properties you enter (for example size, year built, bedrooms, sale history, comparable sales).
Analytics and advertising partners may give us aggregate or inferred data about how you found us.

We do not knowingly collect information from children under 18. The Service is for adults.

US only. The Service is offered to users in the United States. We do not offer it to, market it to, or knowingly collect information from residents of the European Union, European Economic Area, United Kingdom or Switzerland. If you are located there, do not use the Service; if we learn we hold such a person’s information, we may delete it.

3. How we use information

We use information to:

Provide, operate and maintain the Service, including generating, pricing, reviewing and exporting scopes of work.
Process your content and files with artificial-intelligence and machine-learning models, including models run by third parties, to produce drafts, estimates, summaries, classifications, questions and suggestions.
Create and manage your account and authenticate you.
Communicate with you about the Service: sign-in codes and links, receipts, changes, security notices, support, and, where permitted, product news and marketing. You can opt out of marketing at any time.
Understand how the Service is used, measure features, run experiments and improve usability.
Train, evaluate, tune and improve our models, prompts, pricing data and product. We may use your content, files, edits, ratings, and whether you accepted or dismissed a suggestion for these purposes. See section 5 on how to object.
Have people at Amfion, or working for us under confidentiality obligations, view your content, files and the Service’s outputs, to support you, investigate problems, check and label the quality of outputs, and improve the Service and our models.
Build aggregated or de-identified datasets (for example typical renovation costs by region) that do not identify you.
Detect, prevent and investigate fraud, abuse, security incidents and violations of our Terms.
Comply with law, enforce our agreements and protect our rights, our users and the public.
Any other purpose we describe to you when we collect the information, or with your consent.

We do not sell your personal information for money. We share it:

With service providers that process data for us under contract: cloud hosting and storage (Amazon Web Services, United States), authentication (Stytch), product analytics and session recording (PostHog), error monitoring (Sentry), AI model gateways and model providers (OpenRouter and the model vendors it routes to, which may include OpenAI, Anthropic, Google and others), AI observability (Langfuse), address and map services (Mapbox), email delivery, payment processing, customer support and similar vendors. These providers may change over time.
With AI model providers: text and files you submit are sent to third-party models to be processed. Those providers process the data under their own terms; we select providers and settings intended to keep your data out of their training where that option exists, but we cannot guarantee a third party’s practices.
With people you share with: if you share, export, send or print a document, the recipient receives its contents.
In a business transfer: if we are acquired, merge, raise financing, reorganize or sell assets, information may be transferred as part of that transaction.
For legal reasons: to comply with law, subpoenas, court orders or lawful requests; to enforce our Terms; or to protect the rights, property or safety of Amfion, our users or others.
In aggregated or de-identified form that cannot reasonably identify you, for any purpose.
With your consent or at your direction.

5. Your choices and rights

Access, correct, delete: you can edit or delete documents in the Service. To access, export, correct or delete your account and personal information, email slava@amfion.co. We will respond within the time required by applicable law, usually 30 days, after verifying your identity.
Object to model improvement: email us to ask that your content not be used to improve our models and product. We will honor this going forward where technically feasible.
Marketing: unsubscribe links in emails, or email us.
Cookies and analytics: see section 7.
Regional rights: depending on the US state you live in (for example California, Virginia, Colorado, Connecticut, Texas), you may have rights to know what we collect, to delete or correct it, to port it, to opt out of certain sharing or “sale” or “targeted advertising,” to limit use of sensitive data, and not to be discriminated against for exercising rights. We honor these requests as the law requires. California residents: we do not sell personal information or share it for cross-context behavioral advertising as those terms are defined in the CCPA; we may use analytics cookies, and you may opt out via section 7. You may appeal a denied request by replying to our decision. You may authorize an agent to make requests on your behalf.
Do Not Track and Global Privacy Control: we may not respond to browser DNT signals; we honor GPC signals where the law requires.

6. Data retention

We keep information for as long as your account exists and as needed for the purposes above. Afterward we may keep it as long as reasonably necessary to comply with legal obligations, resolve disputes, enforce agreements, maintain backups, and for aggregated, de-identified or model-improvement purposes. Backups and logs may persist for a limited time after deletion. Session recordings and analytics are kept according to our providers’ retention settings. Documents you delete may remain in backups for up to 90 days. Files you attach are stored as you sent them for as long as your account exists, including after you delete the document they were attached to, so we can review them and improve the Service; ask us to delete them at any time (section 5).

7. Cookies, local storage and analytics

We and our providers use cookies, local storage, IndexedDB and similar technologies to keep you signed in, remember drafts and preferences, measure usage, record sessions and detect errors. Essential storage is required for the Service to work. Analytics requests are routed through our own domain, so blocking third-party domains may not block them; you can block or clear storage in your browser settings, which may break parts of the Service. Where a law that applies to us requires consent for non-essential cookies, we will ask for it.

8. Security

We use reasonable technical and organizational measures: encryption in transit and at rest, access controls, isolated environments, short-lived credentials and monitoring. No system is perfectly secure, and we cannot guarantee the security of information you transmit. Keep your email account secure, since it controls access to the Service.

9. International transfers

We host the Service in the United States and may operate it from outside the United States. Your information is transferred to and processed in the United States and in other countries where we or our providers operate, which may have different data-protection laws.

10. Third-party services

The Service links to and relies on third-party services (for example Google sign-in, maps, model providers). Their privacy practices are governed by their own policies, which we encourage you to read. We are not responsible for them.

11. Changes

We may update this Policy. We will post the new version here with a new “Last updated” date and, for material changes, notify you by email or in the Service. Continued use after the change means you accept it.

12. Contact

Viacheslav Sergeev, doing business as Amfion Email: slava@amfion.co