The curriculum is free.
Always.
All 383 problems, all 12 tracks, a real editor, and the whole community — at no cost, with no card. You pay only if you want the written editorials, the visualizers, and the rated rounds.
The full curriculum, in the right order, at no cost.
Everything that makes the hard problems tractable.
For departments, bootcamps and training teams.
Prices shown exclude tax, which is added at checkout based on your billing country. Monthly billing is available at a higher rate. Campus contracts are quoted per seat per term, with a 25-seat floor.
What changes between plans.
Run a cohort with real visibility.
The Campus plan adds the instructor console: assignment completion at a glance, at-risk flags before a student goes quiet for three weeks, the problems your class is actually stuck on, and structural similarity review that compares ASTs rather than text.
Before you pay.
Any time, in both directions. Upgrades are prorated to the day; downgrades take effect at the end of the current period and you keep full access until then.
Start free. Upgrade when the editorials would help.
Questions about a plan? Talk to us.