Alex
DSA · Algorithms
“Walk me through your approach before you write a single line. I’ll stop you if I see the bug coming.
AI mock interviews for top companies — FAANG, Razorpay, Stripe, Swiggy, TCS, and more. Voice or text. Real-time scoring. Built by people who've been on both sides of the table.
Pick a role, pick a round, get an AI interviewer tuned to that exact context.
Same engine. Different personas. Real interviews, every time.
Each persona has its own voice, its own style of probing, and its own way of grading. Pick whichever round you're preparing for.
“Walk me through your approach before you write a single line. I’ll stop you if I see the bug coming.
Every answer gets scored. Every gap gets flagged. Every next session gets queued. Built so you can stop guessing how prepared you are.
ChatGPT will give you a single question, accept your answer, and move on. A real interviewer probes — they ask “what if the load doubles,” “walk me through the edge cases,” “why this approach over that one.” PrepFinity is engineered around that follow-up loop. Each persona is tuned to push you the way a senior engineer would, then scores you on how you handled the pressure — not just the final answer.
Scoring is calibrated against rubrics built with engineers who've conducted hundreds of real interviews at FAANG, Razorpay-tier startups, and major service companies. It will not match a specific human interviewer exactly — neither will two humans match each other — but the per-question scores and weak-topic flags are consistent enough to drive real practice decisions. Use the rubric breakdown, not the single score, as your signal.
The AI is prompted to avoid topics it has asked you in past sessions. You'll see fresh question variants almost every time. If you're using Focus Mode on a specific weak topic, you'll see questions on that topic by design — but the framings will rotate.
It runs on OpenAI's Realtime API. The latency is conversational — the AI will interrupt if you go off track and let you interrupt back. The voices for each persona are deliberately different. It is noticeably less robotic than text-to-speech you've heard elsewhere. The trade-off: voice sessions use Premium credits.
Nothing automatic. No card on file, no surprise charges. You can keep using whatever's left of your free credits as long as you want; they don't expire. When you're ready for more, packs start at ₹199 and you only buy what you need. Pricing is on the pricing page.
No. The platform works for any technical interview in English. The company tracks (Service / Startup / FAANG) cover both Indian and global companies — Google, Microsoft, Amazon on the FAANG side; Razorpay, Stripe, Swiggy on the Startup side; TCS, Infosys, Wipro on the Service side. Pricing is in INR but card payments work internationally via Razorpay.
Yes. Both text and voice interviews work on iOS and Android via the browser. For voice on iOS, use Safari (Chrome on iOS has some audio quirks). Headphones strongly recommended for voice sessions — anywhere there's open-mic feedback, the AI will detect itself speaking and get confused.
Three interviews on the house. No card. No bait-and-switch. If you don't get a real report at the end, we'd be surprised.