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I'm a Coder

Practice, 1v1, AI builder, puzzle rush, AI tutor.

I'm an EducatorViewing

Classrooms for your CS course, free during pilot.

For teams

Evidence-linked assessments. Five participants free.

For CS educators

Start free. Upgrade when your course grows.

Every plan can build every question type except Build with AI. Paid plans add Build with AI, an unlimited quiz library, unlimited Rena hints, AI generation, branding, and bigger roster limits.

Billing frequency

Free

For trying it with a class.

$0forever
Start free
  • Host unlimited live quizzes and games
  • Every question type from MCQ to full coding challenges, except Build with AI
  • 1 open assignment at a time, with up to 40 students and 5 problems
  • Save up to 3 quizzes
  • 9,000+ curated problems with auto-grading
  • Rena hints on assignments, 5 per student each week
  • Browse community templates
Recommended

Classroom Pro

For a working instructor.

$9.99/ month
  • Everything in Free
  • Unlimited saved quizzes
  • Build with AI questions, with an AI workspace for each student
  • Rena hints for students with no weekly limit, in live quizzes too
  • AI question generation
  • Course labs with AI for your students, about 25 labs a month
  • Question sections (custom weighting and timing)
  • Clone community templates into your library
  • Higher assignment and roster limits

Classroom Ultimate

For power users and departments.

$29.99/ month
  • Everything in Pro
  • Three times the class AI, about 75 labs a month
  • Educator Copilot: an AI teammate that drafts and builds quizzes for you
  • Full branding: your logo, colors, and fonts
  • Highest assignment and roster limits

AI help for your students has a monthly limit. We email you before a class reaches it, and you can add more any time.

Have a coupon code?

Redeem classroom access from your department or pilot program. No checkout.

Sign up to redeemLog in

Schools and departments

Buy seat bundles with separate student and educator buckets, a domain allowlist, and invite codes. A seat is only consumed when someone redeems it. We'll size the bundle to your program and handle billing directly.

Talk to us
Teaching is never gated

Every plan, including Free, can author every question type except Build with AI, which runs an AI workspace for each student.

Cancel anytime

Month-to-month or yearly. Export your data whenever you like.

Built for real courses

Plagiarism-resistant runs, live progress, auto-grading on 9,000+ problems.