AI Study SaaS: Quizzes, Flashcards & AI Voice Tutor - 6.4K+ Paying Subs, $434K ARR, $61K SDE

This AI study platform turns lectures, PDFs, videos and textbooks into personalized quizzes and flashcards in seconds, and adds an AI voice tutor students can talk to about what they’re learning. 18.2K monthly active users answered ~1.06M questions in September 2026. The business runs on subscriptions, with 6,400+ paying subscribers and ~$434K ARR. AI customer support and under 5 hours a week of engineering keep it simple to run. Key Highlights ✅ ~$640K TTM revenue; ~$434K ARR; ~$61K SDE ✅ Engagement: 18.2K MAU and ~1.06M questions answered a month (September 2026); ~25% of users who answer questions go on to use the AI voice tutor ✅ Word of mouth: about 1 in 5 new users came from a friend’s referral over the last 12 months ✅ Global: 150+ countries, questions in 100+ languages, app localized into 14; ~46% of revenue from the US ✅ Lean ops (<5 hrs/week); hosting, database and storage cut from ~$6.6K to ~$2.6K a month ✅ Modern stack (React/TypeScript, Python/FastAPI); full product roadmap available on acquisition