InterviewAce — AI-Powered Interview Preparation Platform
InterviewAce is a browser-based interview preparation platform built for software engineers, product managers, designers, and SREs preparing for technical and behavioral interviews. The platform combines real-time voice AI interviews with a curated bank of 8,675 questions, 100 LeetCode-style coding challenges with full reference solutions, an autonomous AI study agent, and adaptive scoring that grades candidates the way a senior hiring manager would. A permanently free tier requires no credit card and includes 20 practice questions, 3 voice interview sessions, the curated question bank, and basic scoring reports.
How does the AI Voice Interview feature work?
The Voice AI Interview feature transcribes your spoken answers using Groq's Whisper API (Realtime mode) or your browser's built-in Web Speech API (Web Speech mode) — both fully free with no monthly cap. The AI interviewer responds via your browser's text-to-speech engine. Each session is automatically scored across five dimensions — technical correctness, communication clarity, problem-solving approach, response depth, and culture-fit signals — using free Groq LLMs (Qwen 3 32B for technical interviews, GPT-OSS 120B for coding interviews, Llama 3.1 8B for HR / behavioral). Voice interviews are free for everyone, on every plan, with no credit card required.
What questions are in the practice bank?
The InterviewAce question bank contains 8,675 interview questions across 23 programming languages including JavaScript, TypeScript, Python, Java, C#, C++, C, Go, Rust, Swift, Kotlin, Dart, Objective-C, Ruby, PHP, Scala, R, Haskell, Perl, PowerShell, SQL, MATLAB, and Bash/Shell. Of those, 1,084 are hand-curated real interview questions imported from MIT-licensed open-source GitHub repositories of verified questions asked at Meta, Google, Amazon, Stripe, and TikTok, 7,476 are practice MCQs, and 115 are AI-curated 2026 questions sharded across 23 per-language banks and calibrated to real company interview patterns. Questions cover roles from Intern through Staff and Principal levels, and across categories including Frontend, Backend, Full-Stack, Data Science, Machine Learning, AI Engineering, DevOps, Site Reliability Engineering, Mobile, Product Management, and Product Design.
How are coding challenges structured?
The coding challenges section contains 100 LeetCode-style problems covering arrays, strings, linked lists, stacks, queues, trees, graphs, hash maps, dynamic programming, backtracking, and system design. Each problem includes a description, two to three input/output examples with explanations, edge case constraints, progressive hints, starter code in four languages, and full reference solutions in JavaScript, Python, Java, and TypeScript. The in-browser JavaScript runner lets candidates execute their solution against test cases and see real console output without leaving the page. Reference solutions cover patterns like Kadane's algorithm, Floyd's tortoise and hare, monotonic stacks, multi-source breadth-first search, longest increasing subsequence in O(n log n), least recently used cache implementation, trie data structures, and topological sort.
What does the AI Study Coach do?
The AI Study Coach is an autonomous interview-prep planner — free for everyone. You set a goal in plain English — for example, "Prepare me for a Senior Software Engineer interview at Stripe in two weeks" or "Land my first internship by April" — and the Study Coach breaks the goal into steps you can watch run in real time. It uses specialized tools: a profile analyzer, a question scanner, a weak-spot finder, a study planner, a content creator, a mock interview generator, and a coach advisor. Pre-built templates include FAANG prep in four weeks, finding weak spots from your practice history, building a behavioral story bank using the STAR method, salary negotiation preparation, resume sanity checks, and reverse interview question lists for asking the interviewer.
What pricing plans are available?
InterviewAce offers two pricing tiers. The Free plan costs nothing forever and includes unlimited practice questions, unlimited mock interviews, unlimited coding challenges with the in-browser runner, the AI Study Coach (autonomous study-plan builder), full access to the 1,084-question real interview bank, browse-only access to the 8,675-question library, and the five-dimension scoring rubric. The Pro plan at $10 per month adds live voice interviews with Zaheen, the AI Coach for unlimited chat sessions, priority email support, and a 7-day money-back guarantee.
How does scoring work?
InterviewAce uses free Groq LLMs (Qwen 3 32B for technical interviews, GPT-OSS 120B for coding interviews, Llama 3.1 8B for HR/behavioral interviews) to evaluate every interview transcript against a five-dimension rubric: technical correctness scores the depth and accuracy of technical content, communication scores clarity and structure of speech, problem solving scores reasoning approach and handling of ambiguity, depth scores how appropriate the response is for the targeted seniority level, and culture scores collaboration and ownership signals. Each session produces an overall score from 0 to 100, per-question breakdown with scores and feedback, three to five strengths, three to five improvement areas, and a hiring verdict of strong hire, hire, lean hire, or no hire. The Dashboard tracks scoring trends across sessions and surfaces personalized insights about where to focus next.
Privacy and data handling
Interview transcripts are stored exclusively in your browser's localStorage and are never transmitted to InterviewAce servers. Scoring and question-generation requests run through Groq's free LLMs with no training-data retention. Voice audio for the Realtime feature is sent to Groq's Whisper API through a stateless Cloudflare Workers proxy that does not log audio content. The platform offers a 7-day money-back guarantee on all paid plans, no questions asked.
Internal navigation
Explore the platform: Voice AI Interview, Practice Mode, Mock Interview, 100 Coding Challenges, Question Bank (8,675 questions), AI Study Agent, Pricing Plans, Your Progress Dashboard, Saved Questions.
Voice AI Interview Simulator
The InterviewAce Voice AI Interview is a real-time spoken interview simulation. The system listens to your spoken answer through your browser microphone, transcribes it with Groq's Whisper API (Realtime mode) or the browser's built-in Web Speech API, and responds with natural conversational follow-ups via the browser's text-to-speech engine. Each interview runs against a curated bank of 55 hand-written questions sourced from real 2024-2026 interviews at Meta, Google, Amazon, Stripe, Uber, and TikTok, covering behavioral, technical, coding, and system-design focus areas. After the session ends, free Groq LLMs (Qwen 3 32B, GPT-OSS 120B, or Llama 3.1 8B depending on interview type) evaluate the full transcript on five dimensions — technical correctness, communication clarity, problem-solving approach, response depth appropriate for seniority, and culture-fit signals — and produce a hiring verdict of strong hire, hire, lean hire, or no hire. All voice interviews are free and unlimited for every user.
Practice Mode — Self-Paced Interview Question Practice
Practice Mode is the self-paced interview question feature. Users filter the 8,675-question bank by language, role, seniority level, difficulty, topic, and question type, then work through questions one at a time without a timer. After each answer, an AI explanation reveals the correct answer along with conceptual context, common follow-up questions, and the underlying principle. Bookmarks let candidates save tough questions for revision before interview day. Practice Mode supports all 23 programming languages with role-specific filters for Frontend, Backend, Full-Stack, Data Science, Machine Learning, AI Engineering, DevOps, Site Reliability, Mobile, Product Management, and Product Design across Intern through Staff/Principal seniority levels.
Mock Interview — Timed Pressure Test
The Mock Interview feature simulates real interview conditions with a strict 60-second timer per question. Sessions auto-advance if the candidate doesn't answer in time, mirroring the time pressure of actual technical screens. Configure language, difficulty, question type, and number of questions, then start the session. At the end, candidates receive a final score, accuracy breakdown by topic, time-pressure metrics, and a side-by-side review of every wrong answer with the correct answer and AI explanation. Sessions are saved to the Dashboard for trend tracking across multiple practice runs. Mock Interview is the closest InterviewAce feature to a real-world technical screen, designed to build mental endurance and time-management skills before the actual interview.
100 Coding Challenges with Reference Solutions
The Coding section contains 100 LeetCode-style algorithm and data-structure problems covering all major interview patterns: arrays, strings, linked lists, stacks, queues, trees, binary search trees, heaps, graphs, hash maps, dynamic programming, backtracking, two-pointer, sliding window, and design problems. Each problem includes a description, two to three input/output examples, edge case constraints, progressive hints, starter code in four languages, and full reference solutions in JavaScript, Python, Java, and TypeScript. Featured problems include Two Sum, Valid Parentheses, Reverse Linked List, Maximum Subarray (Kadane's), Linked List Cycle (Floyd's tortoise and hare), Daily Temperatures (monotonic stack), Number of Islands (DFS), LRU Cache (design), Course Schedule (topological sort), Longest Increasing Subsequence (O(n log n)), Group Anagrams, and Rotting Oranges (multi-source BFS). The in-browser JavaScript runner executes solutions against test cases without leaving the page.
Question Bank — 8,675 Real Interview Questions
The Question Bank is the largest free interview question library on InterviewAce, with 8,675 questions across 23 programming languages. Of these, 1,084 are real interview questions imported from MIT-licensed open-source GitHub repositories of verified interview questions, including sudheerj/javascript-interview-questions, sudheerj/reactjs-interview-questions, sudheerj/angular-interview-questions, sudheerj/vuejs-interview-questions, learning-zone/python-interview-questions, learning-zone/java-interview-questions, learning-zone/nodejs-interview-questions, learning-zone/css-interview-questions, learning-zone/html-interview-questions, learning-zone/sql-interview-questions, learning-zone/react-interview-questions, learning-zone/mongodb-interview-questions, learning-zone/mysql-interview-questions, learning-zone/devops-interview-questions, and sudheerj/ECMAScript-features. Questions are filterable by language, role, seniority, difficulty, topic, and source. The remaining questions are practice MCQs covering core CS concepts (concurrency, memory, data structures, algorithms, async, networking, testing, error handling, databases, security, design patterns, performance) across all 23 languages.
AI Study Coach — Autonomous Interview-Prep Planner
The AI Study Coach is an autonomous interview-prep planner, free for every user. Users set a goal in plain English (for example, "Prepare me for a Senior Software Engineer interview at Stripe in two weeks" or "Land my first internship by April") and the Study Coach decomposes the goal into discrete steps that run autonomously. It operates specialized tools: a profile analyzer that reads practice history, a question scanner that surfaces gaps, a weak-spot finder that ranks topics by accuracy, a study planner that schedules learning sessions, a content creator that generates personalized notes, a mock interview generator, and a coach advisor. Pre-built templates cover FAANG prep in four weeks, weak-spot detection from practice history, behavioral STAR story bank generation, salary negotiation preparation with scripts and counter-offer strategies, resume sanity checks for recruiter red flags, and reverse interview question lists for asking the interviewer. Separate student-focused templates cover landing a first internship, online-assessment crash courses, and turning college projects into STAR stories.
Pricing — Free and Pro Plans
InterviewAce offers two pricing tiers designed to be simple and accessible. The Free plan costs $0 forever and includes unlimited practice, unlimited mock interviews, unlimited coding challenges with the in-browser runner, the AI Study Coach (autonomous study-plan builder), browse access to the 8,675-question library, and the full five-dimension scoring rubric. No credit card is required. The Pro plan at $10 per month adds live voice interviews with Zaheen, the AI Coach for unlimited chats, and priority email support. All paid plans include a 7-day money-back guarantee.
