•FREE DEMO
Free AI Mock Interview
Practice a realistic coding or system design interview with Alex, our AI interviewer. Get follow-up questions, real-time evaluation, a hiring signal, and detailed feedback.
This is a free demo, not an interview credit — it runs shorter and covers less than a paid interview. You can use it once.
Coding
DSA interview
Solve one problem in a live editor while Alex probes your approach, complexity and edge cases, then runs your code against hidden tests.
- · 20 minutes, ends automatically
- · 1 problem (Two Sum)
- · Scored report on that problem
System design
Design interview
Design a URL shortener on a shared whiteboard. Alex reads what you draw and pushes on your requirements, APIs and architecture.
- · 30 minutes, ends automatically
- · Design a URL shortener
- · Scored through the high-level design
The deep dive — failure modes, bottlenecks, hard tradeoffs — is part of a full interview, so the demo wraps up once your architecture is in place.
•SEE IT FIRST
This is what a real interview looks like
A full system design interview with Alex — designing a news feed on the whiteboard, from requirements all the way through the deep dive.
That's a full-length interview. Your free demo puts you in the same seat — same interviewer, same whiteboard, same kind of report — in a shorter round.
Want the full thing? See plans