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Privacy Policy

Effective: September 13, 2026 Last updated: September 20, 2026

1. General

This Privacy Policy (the “Policy”) describes which personal data the knowlee platform (the “Service”, “we”) collects, uses and stores, and the rights a user of the Service (“you”, the “User”) has over that data.

The data controller is:

  • ФОП «Барсуков А.Г.» (individual entrepreneur)
  • Tax id (РНОКПП): 3491904650
  • Address: 12 Heroiv Ave., 756, Dnipro, Ukraine
  • Privacy contact: [email protected]

By using the Service you agree to this Policy. If you do not agree, please stop using the Service.

2. Data we collect

2.1 Data you provide

  • First and last name
  • Email address
  • Password (stored only as a cryptographic hash)
  • If you sign in with Google, Facebook or LinkedIn — the name, email and profile photo that provider shares with us
  • Teacher profile data: specialisation, teaching language(s), description, profile photo
  • Content you create: lessons, homework, tests, materials
  • Payment data (processed by the payment provider; we never receive or store full card details)
  • Your Telegram account identifier — only if you connect Telegram for notifications
  • Correspondence with our support

2.2 Student data

If you, as a teacher, add students to the platform, we process: the student’s name and contact details (email), learning progress, attendance, assignment results and the history of communication within the platform.

The teacher initiates the addition of a student’s data and is responsible for having a lawful basis to do so.

2.3 Technical data (collected automatically)

  • IP address
  • Browser type and version, OS, device
  • Date and time of visits and the pages viewed
  • How you arrived at the Service (for example the link or campaign that brought you)
  • Cookies and similar technologies
  • Analytics on how the Service is used

We process your data to:

  1. Provide access to the Service’s functionality
  2. Identify and authenticate you
  3. Process subscription payments
  4. Send service messages (by email, Telegram or push notification, depending on your settings)
  5. Send marketing messages — only with your separate consent
  6. Analyse and improve the Service
  7. Provide technical support
  8. Comply with legal obligations

The legal bases are the performance of our contract with you (the Terms of Use), your consent (marketing messages, analytics cookies) and our legitimate interest in operating the Service securely and developing it.

4. Sharing with third parties

We do not sell personal data. Data may be shared with a limited set of partners solely to operate the Service:

  • Cloudflare — hosting of the web application, content delivery network, attack protection, backup storage
  • netcup — application and database servers (Germany)
  • Hetzner — video classroom server (EU)
  • PostHog (EU Cloud) — product usage analytics
  • Google Analytics — visit analytics for the knowlee.io website (not the application)
  • SendGrid (Twilio) — email delivery
  • Telegram — notification delivery, only if you have connected Telegram
  • Monobank and Paddle — payment processing (Paddle acts as merchant of record for customers outside Ukraine)
  • Linear — handling of support requests

All partners are required to protect data to a standard no lower than this Policy and Ukrainian law provide.

We may disclose data at the request of authorised public authorities in the cases provided by law.

5. Storage and security

The Service’s data is stored on servers within the European Union. Some partners (notably SendGrid) may process data in the United States under the agreements we hold with them.

We apply technical and organisational safeguards: encryption in transit (TLS), encrypted backups, least-privilege access and regular review of security settings.

Data is kept for as long as your account exists. After an account is deleted, its data is deleted or anonymised within 30 days, except where the law requires longer retention (for example financial records).

6. Your rights

Under the Law of Ukraine “On Personal Data Protection” you have the right to:

  • Access — learn which of your data we process
  • Rectification — have inaccurate or incomplete data corrected
  • Erasure — have your data deleted
  • Withdraw consent — at any time
  • Object — to processing for marketing purposes
  • Data portability — receive a copy of your data in a machine-readable format

If you are in the European Economic Area, you also have the rights granted by the General Data Protection Regulation (GDPR).

To exercise these rights, write to [email protected]. We reply within 30 days.

7. Children and students

If a student added to the platform by a teacher is a minor, their personal data is processed on the basis of consent from their legal representative (parent or guardian) or their educational institution. A teacher who adds a minor’s data confirms that they hold such a lawful basis.

Teacher accounts may only be created by persons aged 18 or over.

8. Cookies

We use cookies and similar technologies to:

  • keep you signed in (strictly necessary cookies);
  • remember interface preferences, including language;
  • analyse how the Service is used.

Strictly necessary cookies are required for the Service to work and cannot be switched off. You can opt out of analytics cookies through your browser settings or by writing to [email protected]. Disabling some cookies may limit the Service’s functionality.

9. Changes to this Policy

We may update this Policy when the law or the Service’s functionality changes. We will announce material changes by email or by a banner in the Service at least 14 days before they take effect. Continued use of the Service after a change means you accept the updated Policy.

10. Contact

For anything related to personal data, write to: [email protected]