Start free. Go Pro when you are ready.
The course and five Easy problems are free. Pro opens every problem, the Sandbox and the AI coach, reviews and mock interviews, paid monthly, yearly or once.
Plans
FAQ
Questions? We have answers.
What is free, and what needs Pro?
The course is free, and with an account so are five Easy practice problems, which you design and run on the canvas. The Sandbox, every other practice problem and every AI feature (the coach and the lesson tutor, AI reviews, run explanations and AI mock interviews) are part of Pro.
What is the difference between monthly, yearly and a pass?
Monthly and yearly renew until you cancel. A pass is paid once for a fixed term and ends by itself, with no renewal. The Pro card shows what each option costs a month and what it saves against paying monthly.
Which currency will I pay in?
Your billing address decides: with an address in India you pay in INR, GST included, and anywhere else in USD. The currency shown first is a guess from where you are, and you can switch it.
How do AI credits work on Pro?
The AI coach, lesson tutor, reviews and mock interviews run on prepaid AI credits in your wallet. Paid Pro adds credits, and credits never expire, so what you do not use carries over. If you need more, AI credit packs top the wallet up.
Can I cancel?
Yes. A subscription stops at the end of the term you paid for, and you keep Pro until then. A pass has nothing to cancel: it ends by itself.
Do you have plans for teams?
Yes. A company can buy Pro seats and assign them to its engineers, billed to the company. Use "Talk to us" and a person on our team replies by email.
Get started
Design is the human part. Get good at it.
Start with the free course, build your first system on the canvas in a free practice problem, and see how it holds under load.