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AI-powered practice and scoring for the Duolingo English Test

Your personal AI tutor — generate a course on anything in seconds

Interactive courses for data science, AI and analytics skills

High-efficiency open-weight and hosted reasoning AI powered by DeepSeek-V4 and R1 at ultra-low token costs.

Learn languages naturally through real AI conversations

Voice-based AI English tutor and learning games for young children

Text, speak and play your way to a new language inside Telegram

An AI-corrected Japanese writing journal that explains every mistake

AI-scored TOEFL Speaking practice aligned to the ETS rubric

AI Quran companion for recitation, memorization, and real-time mistake detection

Learn to code free with hands-on lessons and instant playgrounds

Turn any YouTube video into English dictation and shadowing practice

Learn a language the way native speakers actually talk

AI language learning built into every page you read

Ten minutes of AI-guided English every day — words you won't forget

AI language tutor for speaking practice with instant feedback

A free toolkit for learning Japanese numbers, grammar and natural phrasing

AI reading and math teacher that adapts to your child in real time

A daily dose of English words, right in your browser

Practice English by chatting with an always-available AI tutor

Enterprise developer platform and API for deploying GPT-6 Astra, Sol, Luna, and realtime multimodal agents.

A personalized AI English coach that assesses your speaking and builds your daily practice plan

Spaced-repetition flashcards with dictionaries and spoken audio

Turn your notes into flashcards that stick