Simple, transparent pricing
Built for engineers
who mean business
Four clear plans for different goals — learn, interview, or both. Start free, then upgrade only for the depth you need.
Why engineers choose PRISM
Practice that mirrors the real thing
System design interviews reward the engineers who've thought through tradeoffs — not just memorised diagrams. PRISM builds that muscle.
Live canvas feedback
Draw your architecture, run a simulation, and see latency, failure modes, and coverage scored in real time.
Timed interview mode
Simulate a real 45-minute interview — with a timer, MCQ rounds, and tradeoff questions that adapt to your design.
AI that speaks engineer
Feedback explains why a tradeoff matters — not just what's wrong. You leave each session with a concrete improvement.
Common questions
FAQ
We're currently in a public beta — all Pro features are unlocked for every user until December 31, 2026. After that, paid plans activate. You'll receive advance notice before anything changes — no surprise charges.
Each time you complete an interview session (canvas → MCQ round → tradeoff questions → final reflection), that counts as one evaluation. Practice mode runs — where you simulate without submitting — are always unlimited and free.
Yes. You can downgrade to Explorer (free) at any time. Your paid access continues until the end of your billing period. No partial refunds, but you'll never be billed again after cancelling.
Same features across all durations — the difference is the effective monthly rate. Longer plans cost less per month. Choose 3 months if you have a specific interview window; 6 or 12 months if you're building for the long term.
Team and educational pricing is on our roadmap. If you're a hiring manager or engineering team lead who wants to use PRISM for interview prep at scale, reach out and we'll figure something out.