Comparison · last reviewed April 2026
Premium system design interview prep founded by ex-Meta and ex-Google staff engineers, known for high-quality videos and live mock interviews.
Hello Interview is the gold standard for premium video walkthroughs and live mock interviews — and you pay accordingly. SystemCity is the better choice if you want to actively practice building 100+ architectures, get instant AI feedback, and spend a fraction of the cost.
Hello Interview is widely respected for its FAANG-veteran walkthroughs and coaching marketplace. It is one of the strongest options if your primary need is to watch experienced interviewers reason through problems out loud and book live mocks. Where it stops short is in interactive practice — you watch and read, but you do not actually build.
| Dimension | SystemCity | Hello Interview |
|---|---|---|
| Core format | Interactive drag-and-drop canvas — you build the architecture | Video walkthroughs + written guides |
| Problem count | 120+ problems across easy / medium / hard / advanced | ~30 deeply-covered problems (premium quality, narrower set) |
| Reference solutions | Every problem has a reference architecture you can load and study | Video + written walkthrough by an ex-FAANG engineer |
| Feedback on your design | AI-powered evaluation against requirements — unlimited | Self-assessment from videos, or paid 1:1 mock interviews |
| Live mock interviews | Not offered | Marketplace of vetted coaches ($200–$300 per session) |
| Best for level | Early-career through senior — broad and progressive | Senior, staff, and L6+ FAANG candidates |
| Glossary & learning resources | 50+ glossary terms, learning paths, interview prep guide | Concept guides bundled with premium subscription |
| Pricing | Free tier + Premium from ₹99/month (~$1/month) | Premium ~$59/month or ~$499/year (as of Apr 2026); 1:1 mock interviews billed separately, typically $200–$300 per session. |
Pricing — SystemCity: Free tier + Premium from ₹99/month (≈ $1/month). Billed in INR via Razorpay. Hello Interview: Premium ~$59/month or ~$499/year (as of Apr 2026); 1:1 mock interviews billed separately, typically $200–$300 per session.
Strengths
Limitations
For senior+ candidates within weeks of a FAANG interview who learn best from watching experienced interviewers, Hello Interview offers genuine value — the production quality and instructor caliber are excellent. For everyone else (early-career candidates, those preparing over months, or those who want to actively build instead of watch), SystemCity gives you more practice volume and instant AI feedback at a fraction of the cost.
Yes, and many serious candidates do. Hello Interview is excellent for absorbing how senior interviewers structure their thinking. SystemCity is where you actually practice building those designs yourself, getting instant feedback on each iteration. The two are complementary.
Not at this time. SystemCity focuses on self-paced practice with AI feedback, which scales to unlimited iterations at low cost. If you specifically need a live human interviewer, Hello Interview's marketplace is the leading option — and you can pair it with SystemCity for cheap, high-volume practice between sessions.
Browse 120+ system design problems, build architectures on the interactive canvas, and get AI feedback on your designs. No credit card required.