Get started with InstaMock free of charge. Every user gets 5 free AI mock interviews covering all major interview types: System Design (HLD), Low Level Design (LLD), Data Structures & Algorithms (DSA), and Behavioral interviews. No credit card required. No strings attached. Practice with our advanced AI interviewer, get instant feedback, and see if InstaMock is right for your interview preparation journey.
Each free mock interview is a full, realistic 45-minute session. Your AI interviewer will conduct a complete interview in your chosen topic. You get instant scoring, detailed performance feedback, and a comprehensive report identifying your strengths and areas for improvement. All 5 interviews can be used on any topic: you could do all 5 on System Design, split across multiple topics, or focus on your weakest area. The choice is yours.
System Design (HLD): Practice designing large-scale distributed systems like WhatsApp, Netflix, Uber. Low Level Design (LLD): Master object-oriented design, SOLID principles, and design patterns. DSA: Solve coding problems on arrays, trees, graphs, dynamic programming, and more. Behavioral: Practice STAR method and company-specific leadership questions. Each type is available as a free interview.
Real-time AI interviewer that simulates actual technical interviews. Instant feedback after each session. Performance scoring across multiple dimensions. Detailed reports showing your strengths and improvement areas. Access to all problem types and categories. Leaderboard visibility. Video/audio input for realistic interview simulation.
Testing our platform before committing ensures you get value from a premium plan if you choose to upgrade. Our free tier is genuinely useful for interview prep—not a limited demo. 5 complete sessions are enough to understand our teaching style, get comfortable with the interface, and see measurable improvement. Many users improve significantly with just the free tier and decide whether they need more practice.
Sign up free (no payment info needed). Choose your interview type (System Design, LLD, DSA, or Behavioral). Select a specific topic or let AI pick randomly. Complete the 45-minute interview session. Get instant feedback and performance report. Repeat until you've used all 5 free interviews. Track your progress on the leaderboard.
After using your 5 free interviews, upgrade to Premium for unlimited mock interviews plus: detailed analytics and progress tracking, personalized improvement recommendations, priority support, advanced interview simulations, and access to 1:1 mock interviews with expert engineers. But your free interviews never expire—keep using them anytime.
Students just starting interview prep. Job seekers wanting to test a new platform. Candidates preparing for Google, Amazon, Meta, Microsoft, Netflix, and other FAANG companies. Engineers switching roles or re-entering the job market. Anyone wanting honest, AI-powered interview feedback without financial commitment.
No credit card. No hidden fees. No time limits. Just 5 complete AI mock interviews to practice System Design, LLD, DSA, and Behavioral interviews.
45-min HLD interview
OOP & Design Patterns
Coding Problems
Leadership & STAR
Get AI-powered scoring and detailed feedback immediately after each interview.
Experience interviews that simulate real FAANG hiring processes.
Upgrade to premium anytime if you find value. Your free interviews stay available.