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There is no pricing page because there is no price. Every course, problem, exercise and the AI tutor is available to any account; mock interviews and interview preparation come with Campus, through your college. What follows is what you get, not what a tier gets.
A dependency-ordered curriculum from complexity analysis through arrays, hashing, pointers, windows, binary search, linked lists, stacks and recursion. Each chapter states what you should be able to do afterwards, then checks it with problems and recall.
Open the curriculumEach pattern page opens with the clues that identify it and the look-alikes that do not. Recognition is the skill an interview actually tests, so it is taught directly rather than left to emerge from volume.
Browse patternsPython, JavaScript, Java and C++, run against tests in an isolated sandbox. A failure shows the case that broke and what it expected, not a red cross.
Browse problemsDraw an architecture for a realistic brief and say what you traded away. The reference design and its trade-offs appear after you submit — withholding them before that is the whole exercise.
See the exercisesDecide what each class is the only thing that knows, then defend it. Same rule as system design: you commit to a design before you see one.
See the exercisesSolving something once is not learning it. Solved problems return on a widening schedule, and how well you recall them sets the next interval.
Open reviewBoth of them are built to make you do the work. Neither will hand you a finished solution, and neither can see a hidden test or a reference answer — that material never reaches the model.
It knows the chapter you are reading and the code in your editor, and it walks you toward the answer instead of handing it over. Hints escalate only when you ask for the next one.
An interviewer that asks rather than teaches, and will not correct you mid-answer. The feedback comes afterwards, with evidence quoted from your own transcript. Part of Campus: students reach it through their college.
An account exists so your progress, notes, submissions and conversations have somewhere to live and stay yours. That is the only thing it is for.
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Free for every learner. No paid tier.