Pricing
One Pro plan unlocks the full Low Level Design curriculum, every solved case study, and the interactive playground. Prices are shown for your region.
Free vs Pro
Start free, no card needed. Pro unlocks the rest.
Lessons
- Free
- OOP refresher, design principles, class relationships, all 19 design patterns with their Pattern Labs, advanced Python, advanced concurrency and the interview guide
- Pro
- All 170+ lessons, including the HLD concepts module
Case studies
- Free
- None
- Pro
- All 42, with complete solutions
Playground problems
- Free
- 3 (Parking Lot tutorial, Elevator, File System)
- Pro
- All 43, with reference solutions
AI design and code reviews
- Free
- 3 reviews
- Pro
- Unlimited
Cheat sheets and concept maps
- Free
- Included
- Pro
- Included
Billing questions
Is there a free tier?
Yes. The Free vs Pro table above shows everything you can use for free. No card is needed.
Do yearly plans renew automatically?
Yes. Yearly plans renew each year, and you can cancel the renewal at any time. You keep access until the end of the period you paid for.
Why are prices shown in my currency?
Plans are priced for your region and checkout runs through the payment provider that serves it.
Can I get a refund?
Payments are final once a plan is activated. Please read the cancellation and refund policy before purchasing.
Read the full cancellation and refund policy, or contact support with any other questions.