Privacy Policy

We collect only the information needed to provide, secure, and improve Noesis:

• Account information: When you create an account via Google, GitHub, or username and password, we store your username or email address, authentication identifiers, and password hash (if you use password login).
• Content you add to Noesis: Articles you import via URL or web clipper, PDFs you upload, guided courses you generate, notes and highlights you save, and messages you exchange with your AI learning companion.
• Billing information: If you upgrade to a paid plan or purchase credits, payments are processed directly by Stripe. Noesis never receives or stores your full credit card number.
• Usage and device data: Basic diagnostic and analytics data (such as pages visited, feature interactions, browser type, and error logs) so we can keep the service reliable and understand which features are useful.

We use your information strictly to operate and improve Noesis:

• To store, render, and sync your reading library, notes, and guided learning courses across devices.
• To generate AI-powered explanations, key term annotations, interactive mini-courses, diagrams, quizzes, and companion responses when you request them.
• To authenticate your sessions, manage your subscription or credit balance, and prevent abuse.

When you use AI features, relevant excerpts of your article, note, or prompt are sent to our third-party large language model providers (such as Google Gemini, Anthropic, or OpenAI APIs) solely to fulfill your request. We use commercial API tiers that do not use customer API payloads to train their foundation models.

If you install the Noesis browser extension, the extension only accesses the content and URL of a web page when you explicitly activate it (for example, by clicking the extension icon to clip an article into your Noesis library).

The extension does not track your general browsing history in the background, inject ads, or collect data from tabs you do not choose to save.

Materials and courses you create in Noesis are private by default. If you choose to toggle an article or a guided learning course to Public, anyone with the link will be able to view that article or course. You can revoke public access or delete the item at any time.

We rely on a small set of trusted infrastructure providers to run Noesis, including cloud hosting and storage, authentication providers (Google and GitHub OAuth), payment processing (Stripe), AI model APIs, and basic traffic analytics (Google Analytics).

We use essential cookies and local storage to keep you signed in and remember your preferences, along with analytics cookies to understand aggregate site usage. We do not use third-party advertising networks or cross-site ad tracking cookies.

We retain your account and library content for as long as your account is active. You can delete individual articles, notes, or courses directly inside the app at any time.

Depending on where you live (including under GDPR and CCPA), you have the right to access, export, correct, or request complete deletion of your personal data. To request an export or permanent deletion of your account and all associated data, email us at support@noesis-ai.app.

If we make material changes to this Privacy Policy, we will update the date at the top of this page and, where appropriate, notify you in the app or by email.

Questions or requests about privacy? Reach us anytime at support@noesis-ai.app or through our contact page.