Privacy Policy

Last updated: January 2026

Overview

Verbarium is a browser extension that enables users to practice their language skills using native content found across the web. This privacy policy explains what data we collect, why we collect it, and how we protect it.

Single Purpose

Verbarium's single purpose is language learning practice on any webpage.

The extension overlays interactive exercises onto any webpage, allowing users to translate sentences, transcribe audio, answer comprehension questions, and practice pronunciation. All features serve this single purpose: transforming any webpage into an immersive language learning environment.

The extension does not modify webpage content, inject ads, or perform any function unrelated to language practice.

Data We Collect

Verbarium collects the following data only when users are signed in and actively practicing:

Practice Sessions

Track learning progress and compute statistics

Page URL & Title

Identify source material for context

Selected Text

The sentence/passage being practiced

User Responses

Translations, transcriptions, comprehension answers

AI Feedback

Scores and corrections from AI analysis

TTS/STT Usage

Track audio feature usage for service optimization

Email Address

Account identification and authentication

What We Do NOT Collect

Browsing history or pages visited (only pages where you actively practice)
Passwords (handled by our authentication provider)
Payment information (if applicable, handled by payment processor)
Location data
Personal files or documents

Data Storage & Security

All data is stored in Supabase (PostgreSQL database with row-level security)
Users can only access their own data (enforced at database level)
Data is encrypted in transit (HTTPS) and at rest
Authentication uses industry-standard JWT tokens

Third-Party Services

We do NOT sell, rent, or share user data with third parties for marketing or advertising purposes.

Data is shared with the following service providers solely for functionality:

Supabase

Database, Auth, Storage

All user data (as data processor)

OpenAI

AI feedback generation

Practice text and user responses (no PII)

Cartesia

Text-to-speech, Speech-to-text

Practice text (no PII)

Browser Permissions

The Verbarium extension requires the following browser permissions:

Storage: To save your preferences (language, dark mode, etc.) and authentication state locally
Tabs: To broadcast settings changes to all open tabs so changes take effect immediately
Host Permission (supabase.co): To communicate with our backend for authentication, data storage, and AI-powered features

Your Rights

You can:

Access all your stored data via the extension
Request data export by contacting us
Delete your account and all associated data
Disable data collection by signing out (extension works in limited offline mode for non-authenticated features)

Contact

For privacy inquiries, please contact us at: [email protected]