Show HN: Mockstar – AI mock interviews and feedback for jobseekers

1 mattdotam 0 6/16/2025, 8:49:16 AM mockstar.co ↗

I coach job-seekers, but ongoing human sessions get pricey, especially for early-career hires and non-native speakers. So I've built Mockstar, a web-app that runs AI mock interviews and returns quantitative feedback.

With online screening and interviews becoming easy to game, I expect companies to prioritise in-person interviews. Mockstar helps candidates make every real interview count.

Technical highlights: - Real-time bidirectional streaming: OpenAI + ElevenLabs + HeyGen with WebSocket orchestration for natural back-and-forth dialogue - Custom analysis pipeline: Deepgram + FFmpeg + MediaPipe for quantitative analysis

Pay-as-you-go credits: $20/hr for voice, $45/hr for video (you choose the interview length).

You can try out Mockstar with $10 in free credits with no card needed at https://mockstar.co.

Feedback welcomed. I'm proud to have something to show after 10+ years of lurking on HN. Cheers.

Engineers at our startup don't build features anymore

WhatsApp Ads, Coffin Nails

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Show HN: Mockstar – AI mock interviews and feedback for jobseekers

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