Liftoff

Liftoff is an open source mock interview simulator that gives AI feedback on your practice answers. You pick an interview question, record yourself answering in the browser, and the app transcribes the recording with OpenAI Whisper and has a GPT model grade the answer and return written feedback. The hosted demo lets you try it immediately, with all questions and solutions available. It is built for software engineers and other candidates preparing for technical and behavioral interviews who want a low stakes way to rehearse. Because the project is published as a template on GitHub, it also serves developers who want a working starting point for their own AI interview or coaching product. The stack is Next.js with TypeScript and Tailwind CSS, deployed on Vercel with Upstash Redis for rate limiting, and it can be deployed with one click to Vercel or cloned locally with a single create next app command. The only external requirement is an OpenAI API key. There is no pricing. The demo is free to use and the code is free to deploy, with the operator paying their own OpenAI usage. Note that the repository is a community project by an individual developer rather than a supported commercial product, and its last update was in December 2023.