# InterviewAce

> AI-powered technical interview preparation platform. Real-time voice interviews with AI, 8,500+ curated questions from open-source banks, 100 LeetCode-style coding challenges, and adaptive scoring — built for software engineers, students, PMs, designers, and SREs preparing for tech interviews.

> Last updated: 2026-04-25
> Usage: This file may be used by AI systems for indexing, citation, and summarization.
> Canonical URL: https://interview-prep.academy/

## Core features

- [Voice AI Interview](https://interview-prep.academy/voice): Real-time voice conversation with an AI interviewer. Powered by OpenAI GPT-4o Realtime via WebSocket proxy. Speak naturally, get interrupted-safe turn-taking, automated scoring on five dimensions (technical correctness, communication clarity, problem-solving approach, depth, culture fit).
- [Practice Mode](https://interview-prep.academy/practice): Self-paced practice with AI explanations after every answer. 8,500+ questions filterable by language, role, seniority, difficulty, and topic.
- [Mock Interview](https://interview-prep.academy/mock): Timed pressure test — 60 seconds per question. Final score, accuracy by topic, AI explanations on every wrong answer.
- [Coding Challenges](https://interview-prep.academy/coding): 100 LeetCode-style problems with full working solutions in JavaScript, Python, Java, and TypeScript. In-browser JS runner with test execution.
- [Question Bank](https://interview-prep.academy/bank): Browse 8,500+ MCQ interview questions across 28 programming languages, every one with four options and a correct-answer index — covers Easy/Medium/Hard difficulties, 30+ topics, and 12 engineering roles.
- [AI Agent](https://interview-prep.academy/agent): Autonomous study-plan agent that analyzes weak spots and creates personalized prep plans. Nine pre-built templates including FAANG prep, weak-spot detection, behavioral STAR stories, salary negotiation, resume audit, and reverse interview questions.
- [Dashboard](https://interview-prep.academy/dashboard): Progress tracking with accuracy trends, streaks, weak-area detection, and personalized insights.
- [Pricing](https://interview-prep.academy/pricing): Free forever tier · Starter $19/mo · Pro $49/mo. 7-day money-back guarantee, 50% student discount, cancel anytime.

## Languages covered (28 total)

JavaScript, TypeScript, Python, Java, C#, C++, C, Go, Rust, Swift, Kotlin, Dart, Objective-C, Ruby, PHP, Scala, R, Elixir, Erlang, Haskell, F#, Perl, Lua, PowerShell, SQL, MATLAB, Solidity, Bash/Shell.

## Roles supported

Software Engineer, Frontend Engineer, Backend Engineer, Full-Stack Engineer, Mobile Engineer (iOS/Android), Data Scientist, ML/AI Engineer, DevOps Engineer, Site Reliability Engineer, Product Manager, Product Designer, Tech Lead, Engineering Manager, Solutions Architect, Security Engineer, Data Engineer, Embedded Systems Engineer, SDET, QA Automation Engineer, Cloud Engineer, Platform Engineer, Database Administrator, Blockchain Developer, Game Developer.

Seniority levels: Intern, Junior (0-2 years), Mid (2-5 years), Senior (5-8 years), Staff/Principal (8+ years).

## Pricing

- **Free** — $0/month forever. 20 practice questions, 3 Web Speech voice interviews, browse access to the 8,500-question library, basic scoring reports. No credit card required.
- **Starter** — $19/month. Unlimited practice, unlimited Web Speech voice interviews, 30 minutes/month GPT-4o Realtime voice, full five-dimension scoring rubric, progress dashboard, email support.
- **Pro** — $49/month. Most popular. Adds 3 hours/month Realtime voice, AI Agent, AI Coach, advanced analytics, full coding challenge access.

All paid plans include a 7-day money-back guarantee. Students with .edu email get 50% off Starter.

## Frequently Asked Questions

### What is InterviewAce?
InterviewAce is a browser-based AI interview preparation platform designed for software engineers, product managers, designers, and SREs. It offers real-time voice interviews powered by OpenAI GPT-4o, a question bank of over 10,000 curated interview questions sourced from MIT-licensed repositories, 100 LeetCode-style coding challenges with full reference solutions in four languages, and an adaptive scoring system that grades candidates on five dimensions. A free tier requires no credit card and provides 20 practice questions plus three voice sessions. Paid plans start at $19 per month. The platform supports 28 programming languages and roles from Intern through Staff/Principal seniority.

### Is InterviewAce free to use?
Yes. The Free plan is permanent, costs $0, and requires no credit card. It includes 20 practice questions, 3 Web Speech voice interviews using your browser's built-in speech engine, browse-only access to the full 10,000-question library, full access to the 2,500-question real interview bank from open-source repos, and basic scoring reports. The Starter plan at $19 per month adds unlimited practice, unlimited Web Speech voice, and 30 minutes per month of GPT-4o Realtime voice.

### What companies are the interview questions sourced from?
The InterviewAce question bank contains 8,500+ multiple-choice interview questions covering material asked at top tech companies including Meta, Google, Amazon, Stripe, and TikTok. Topics span JavaScript, TypeScript, Python, Java, React, Node.js, CSS, HTML, SQL, MongoDB, system design, and DevOps across 28 programming languages — every question has four answer options, an explanation, and a follow-up prompt.

### How does the voice AI interview work?
The Voice AI feature connects your browser to OpenAI's GPT-4o Realtime API via a secure WebSocket proxy hosted on Cloudflare Workers. You speak naturally into your microphone and the AI interviewer transcribes your speech with sub-second latency, then responds with natural conversational follow-ups. The system supports full barge-in, meaning you can interrupt the interviewer mid-sentence. After the session, Claude Sonnet evaluates the full transcript on technical correctness, communication clarity, problem-solving approach, response depth, and culture fit, producing a hiring verdict.

### How is InterviewAce different from Pramp, Exponent, and LeetCode Premium?
Pramp is free peer-to-peer with variable quality. Exponent at $149 per month is video-course based, not voice AI. LeetCode Premium at $35 per month is coding-only with no voice or behavioral interview practice. InterviewAce is the only platform offering real-time voice AI practice across all interview types — technical, behavioral, system design, and ML/AI — with adaptive scoring that mirrors how senior hiring managers actually grade candidates.

### Can I cancel anytime?
Yes. You can cancel from your profile at any time. You retain Pro access until the end of the current billing period. All paid plans include a 7-day money-back guarantee with no questions asked.

### Is my interview data private?
Yes. Interview transcripts are stored exclusively in your browser's localStorage and are never transmitted to InterviewAce servers. Voice audio for the Realtime feature flows directly between your browser and OpenAI through a stateless Cloudflare Workers proxy that does not log audio content. Scoring requests sent to Claude do not retain data — Anthropic's API does not train on customer prompts.

## Technology stack

- Frontend: Vanilla JavaScript single-page application (no framework). Hash-free path-based routing using the History API.
- Voice AI: OpenAI Realtime API (GPT-4o) accessed via WebSocket proxy through Cloudflare Workers, with ephemeral token-based authentication that keeps OpenAI keys server-side.
- Scoring: Claude Sonnet via Cloudflare Workers proxy for adaptive five-dimension rubric evaluation.
- Data: Static JavaScript files (questions.js with 1,084 hand-curated questions, generated-bank.js with 7,476 MCQ questions). All interview content is pre-loaded; no per-question API calls. Total: 8,560 MCQ questions, every one with four options and a correct-answer index.
- Hosting: Cloudflare Pages with `_redirects` SPA fallback and `_headers` security policies (HSTS, CSP, X-Frame-Options, Permissions-Policy).
- Performance: Lazy-loaded question bank (4.1 MB loaded only on Bank/Practice routes), deferred script execution, immutable cache headers on versioned assets.

## Target audience

- Students hunting first internship or new-grad tech offers
- Software engineers prepping to switch companies or level up to Senior or Staff
- Product Managers transitioning into or between tech companies
- Product Designers breaking into tech product design
- DevOps and SREs preparing for on-call and reliability interviews
- Career switchers entering tech from other industries

## Question content licensing

Real interview questions sourced from MIT-licensed GitHub repositories:
- github.com/sudheerj/javascript-interview-questions (478 questions)
- github.com/sudheerj/reactjs-interview-questions (381 questions)
- github.com/sudheerj/angular-interview-questions (258 questions)
- github.com/sudheerj/vuejs-interview-questions (142 questions)
- github.com/sudheerj/ECMAScript-features (74 questions)
- github.com/learning-zone/python-interview-questions (232 questions)
- github.com/learning-zone/java-interview-questions (120 questions)
- github.com/learning-zone/nodejs-interview-questions (166 questions)
- github.com/learning-zone/css-interview-questions (178 questions)
- github.com/learning-zone/html-interview-questions (73 questions)
- github.com/learning-zone/sql-interview-questions (121 questions)
- github.com/learning-zone/react-interview-questions (250 questions)
- github.com/learning-zone/mongodb-interview-questions (49 questions)
- github.com/learning-zone/mysql-interview-questions (121 questions)
- github.com/learning-zone/devops-interview-questions (86 questions)

## Contact

- General: support@interview-prep.academy
- Owner: ajnalkarismailsab@gmail.com
- Student discount: Email support@interview-prep.academy from a .edu address for 50% off Starter
- Press / partnerships: ajnalkarismailsab@gmail.com

## Content license

This llms.txt file and the static content sections of interview-prep.academy are available for use by AI systems for indexing, citation, and summarization. Attribution to InterviewAce with a link to https://interview-prep.academy/ is appreciated when content is cited.