Privacy Policy
September 20, 2026
Your privacy matters. Platonis’ mission is to help students stay consistent and focused by combining organization, collaboration and artificial intelligence. It is essential for us to be transparent about what personal data we collect about you, how it is used and with whom it is shared.
This Privacy Policy applies when you use our Services (described in the User Agreement). We offer options regarding the data we collect, use and share, as described in this Policy, the Cookie Policy and your account settings.
Data controller: MELINIA SERVIÇOS ONLINE DO BRASIL LTDA., registered under CNPJ No. 50.760.485/0001-90, is the controller of the personal data you provide, collected by it or on its behalf, or processed in connection with our Services.
Note: for users in Brazil, this Policy is interpreted in accordance with the Brazilian General Data Protection Law (LGPD, Law No. 13,709/2018). The English, Spanish and French versions are translations provided for your convenience; in case of any discrepancy, the Portuguese version prevails.
1. Data we collect
1.1 Data you provide to us
Registration: to create an account, you provide data including your name, e-mail and password. Optionally, you may add a photo, educational institution, study goal (admission exams, civil service exams, bar exam) and other profile information.
Content: we collect personal data you post or upload to the Services, such as feed posts, comments, articles, contributions to groups and communities, notes, flashcard decks, and answers to mock exams and daily challenges.
1.2 Service usage data
We log your visits and use of our Services, including the applications. This includes: pages viewed, clicks, searches, study time, progress in learning paths and plans, mock exam and flashcard results, XP and streaks in daily challenges, participation in groups and communities, social interactions (likes, comments, follows) and notifications. We use logins, cookies, device information and IP addresses to identify you or log your use.
1.3 Cookies and similar technologies
We use cookies and similar technologies to collect data and recognize you and/or your devices as you interact with our Services, as described in detail in our Cookie Policy.
1.4 Third-party data
Other users may post content that includes information about you (for example, @mentions in the feed). If you use social login features (for example, sign in with Google), we receive the basic data you authorized from the provider (name and e-mail). Institutions (prep courses, schools and organizations) that use Platonis business services may provide us with data about their students and members.
2. How we use your data
We use your data to provide, personalize and develop our Services and to support users. How we use it depends on the Services you use, how you use them and the settings you have selected.
2.1 Providing the Services
- Authenticate your access and keep your session secure;
- Generate and adjust your study plan, learning paths and priorities;
- Calculate your progress, XP, streaks and ranking position;
- Suggest learning paths, flashcards, questions, mock exams and daily challenges;
- Operate groups, communities, the feed, @mentions, articles and messages;
- Enable the AI assistant to summarize content, generate questions and reorganize your routine.
2.2 Communication
We will contact you by e-mail, on-site or in-app notifications and other channels available through the Services, including messages about availability, security and service-related matters, study reminders, network updates and news. You can adjust communication preferences at any time; essential service, security and legal messages cannot be turned off.
2.3 Development and research
We use data, including feedback, to conduct research and develop our Services to offer a better, more intuitive and personalized experience. We also use your data to develop and train artificial intelligence models that power features such as question generation, adaptive mock exams and study recommendations.
2.4 Security and investigations
We may use your data for security purposes and to prevent and investigate fraud, misuse of the Services or violations of the User Agreement and the law.
2.5 Legal bases (LGPD)
We process your personal data on the following legal bases, under Article 7 of the LGPD:
- Performance of a contract: to provide the platform’s essential features (account, study plan, flashcards, mock exams, groups) — Art. 7, V;
- Consent: for marketing communications, non-essential cookies and optional features — Art. 7, I;
- Legitimate interest: to improve the Services, prevent fraud and ensure platform security, always within your reasonable expectations — Art. 7, IX;
- Compliance with legal or regulatory obligations: when the law requires it (for example, a court order) — Art. 7, II;
- Regular exercise of rights in judicial, administrative or arbitration proceedings — Art. 7, VI.
4. Retention and disposal of data
We keep your personal data for as long as necessary for the purposes described in this Policy: while your account exists (registration data and content), for the applicable statutory period (access logs and transactions) and for a reasonable backup period after deletion. When you close your account, we delete or anonymize personal data, except where retention is required by law or necessary for defense in legal proceedings.
5. Security
We use reasonable technical and administrative measures to protect your data, including encryption in transit (HTTPS/TLS), least-privilege access control, monitoring and incident response. No system is completely immune; if we detect a security incident that may pose a relevant risk to you, we will notify affected users and the national authority (ANPD) in accordance with the LGPD.
6. Your rights
Under Article 18 of the LGPD, you may, at any time and free of charge:
- Confirm the existence of processing of your data and access it;
- Correct incomplete, inaccurate or outdated data;
- Request anonymization, blocking or deletion of unnecessary, excessive or non-compliant data;
- Request portability of your data;
- Revoke consent and request deletion of data processed on that basis;
- Obtain information about with whom we share your data;
- Obtain information about the possibility of not providing consent and its consequences;
- Revoke consent and request deletion of data processed on the basis of consent.
To exercise any of these rights, write to privacidade@platonis.com.br or use your account settings (for example, data export and account deletion). We will respond within 15 days, as required by the LGPD. You may also file a complaint with the Brazilian National Data Protection Authority (ANPD).
7. Children’s data and changes
9.1 Minors under 18
The Services are intended for people at least 16 years old. For users under 18, use of Platonis must occur with the knowledge and consent of a parent or guardian, who may request information and exercise data subject rights on behalf of the minor.
9.2 Changes to this Policy
We may modify this Privacy Policy. In case of substantial changes, you will receive notice through the Services or by other means so you can review the changes before they take effect. Your rights over data already collected are not reduced retroactively without legal basis.
How to contact us
For questions about this document or about the Platonis services, contact us at contato@platonis.com.br.
For matters related to personal data and privacy, contact our Data Protection Officer (DPO) at privacidade@platonis.com.br.
Related documents
- User Agreement
- Privacy Policy (you are here)
- Cookie Policy