Hyperscreen is an AI that does mock technical interviews with you so you can pass more tech screens. You can choose a problem category, company, difficulty level, and length (up to 60 minutes), and get detailed feedback after each interview.
I have used Hyperscreen AI a lot all throughout recruiting and it helped me feel much more confident in interviews and provided me with loads of good feedback for improving technically. It's also much much cheaper than in-person mock interviews for much the same effectiveness. Could not recommend enough.