Your AI interview copilot
they can't see.
Screenshot any problem, get expert-level answers in seconds. Coding, system design, behavioral. No one will know.
Invisible on every platform
Don't take our word for it. Test it yourself.
Download TopCoder, start a Zoom or Google Meet on your laptop, then join the same meeting from your phone. Share your screen and see for yourself. TopCoder is completely invisible on the other device.
What users are saying
Ready in under two minutes
Download, verify it's invisible, and try the AI. All free.
Download & verify
Download TopCoder for Mac. Start a video call, share your screen, then check from your phone. The window is invisible.
Verify it yourself before your interview
Try the AI free
Screenshot any coding problem and get a complete solution with what to say. Try system design too. 3 free AI analyses included.
No credit card required
Ace your interview
Go live. Screenshot any question during your interview and get an instant solution in an invisible overlay only you can see.
Works with any interview format
Built-in stealth
Invisible at the
operating system level.
TopCoder uses proprietary stealth technology built into macOS to be completely invisible to all screen capture. Not a workaround. Not detectable. The window simply doesn't exist to capture tools.
What your interviewer sees:
Everything happens in real time
From the moment your interview starts, TopCoder is listening, watching, and ready.
Live Audio Transcription
Captures your interviewer's voice in real time. Transcribes the conversation and uses the full context to generate smarter, more relevant answers.
Screenshot Analysis
Click a button to capture any coding problem on your screen. In seconds, get a complete working solution with complexity analysis and a walkthrough of what to say as you type it.
Knowledge Base
Upload your prep notes, STAR stories, and research. TopCoder weaves them into answers that sound like you.
Talk-Through Script
Every solution comes with a line-by-line explanation you can read right off the screen. Walk your interviewer through the logic like you wrote it yourself.
Answer Engine
Structured answers that sound human
Every response follows the same framework top candidates use. Structured by question type, delivered in seconds.
Clarify
Smart clarifying questions to ask your interviewer
Approach
Multiple solutions ranked by optimality
Code
Clean, working code in your preferred language
Walk-through
Line-by-line explanation of the logic
What to Say
Teleprompter script you read as you code
Follow-ups
Pre-built answers for interviewer questions
System Design
Each section includes a say script and detailed markdown with diagrams, tables, and code.
Behavioral
Pulls from your uploaded STAR stories and structures the response using the STAR framework interviewers expect.
Every interview format, covered
Coding is our sweet spot, but TopCoder handles every type of technical interview.
Coding & Algorithms
LeetCode, HackerRank, CoderPad: screenshot any problem and get complete solution code, Big-O analysis, and exactly what to say as you write it.
System Design
Comes preloaded with detailed answers for the top system design questions (Uber, Twitter, YouTube, etc.). Upload your own notes too, just like NotebookLM. TopCoder pulls everything in real-time to help you nail trade-offs, capacity estimates, and design decisions.
Behavioral
Load your STAR stories and talking points. When they ask "Tell me about a time...", TopCoder finds the perfect story from your notes and structures the response.
Knowledge Base
Your prep notes,
live in the interview.
Top system design questions come preloaded with complete answers. Drop in your own notes (algorithm cheat sheets, STAR stories, company research) and TopCoder indexes everything, weaving it into answers that sound like you.
Even without any notes, TopCoder knows how to structure answers the way interviewers expect. The AI generates well-formatted responses for coding, system design, and behavioral questions out of the box.
Drag & drop files to upload
Common questions
Yes. TopCoder is completely invisible to all screen sharing and screenshot tools. This is built into the app at a deep level, not a hack or overlay trick. We encourage you to verify this yourself during onboarding.
TopCoder works with any video calling or screen sharing platform on macOS: Zoom, Google Meet, Microsoft Teams, Webex, CoderPad, HackerRank, or any other tool where you share your screen.
No. TopCoder is a macOS desktop app. Technical interviews (coding rounds, system design, behavioral) happen on your laptop anyway, so that's where TopCoder runs.
Currently TopCoder is macOS only. The stealth technology relies on macOS-specific capabilities. Windows and Linux support may come in the future.
TopCoder excels at software engineering interviews: system design, LeetCode-style coding, data structures and algorithms, behavioral questions, and technical discussions. It helps with any interview where you need quick, accurate responses.
No. TopCoder has an Extreme Stealth mode that hides all mouse activity from the browser. Platforms like HackerRank, CodeSignal, and CoderPad can't detect it. Toggle with Ctrl+Shift+E anytime. All shortcuts use Ctrl+Shift which browsers cannot intercept on macOS.
No. TopCoder does not appear under its own name in Activity Monitor. It runs under a generic system process name, so there's nothing to connect it to the app even if someone checks your running processes.
TopCoder uses state-of-the-art AI models for vision, code analysis, and speech-to-text transcription.
Yes. You get 2 coding and 1 system design analysis free during onboarding, so you can experience the full power before purchasing. No credit card required. You can also verify the stealth invisibility yourself.
See it to believe it.
Download the app, verify the invisibility yourself, and try 3 free AI analyses (coding and system design). No credit card needed.
Download for Mac - FreemacOS 14+ required · Apple Silicon only
Bugs, feature ideas, or technical questions?
support@topcoder.app