Best AI Mock Interview Tools for Software Engineers in 2026 (prices checked, from someone who built one)

I built DevInterview.AI, so I have an obvious bias. I also spend a lot of time on these tools, and most "best AI mock interview tools" lists are written by people who haven't opened half of them, with prices that are a year stale. So here's the comparison I'd want, with every price checked on the vendor's own site on September 30, 2026, and the places where someone else is the better pick called out. You want unlimited reps with a voice interviewer: DevInterview.AI, $19.99 a month, first interview free. You want a human who has run real hiring loops: interviewing.io, from $179 a session.