Verdict: they answer different questions. interviewing.io tells you where you stand, with a real senior engineer judging you for one evening at $179 and up. DevInterview.AI builds the skill that judgment measures, with unlimited live voice interviews at $24.99 a month. Most people need the reps far more than the reading, and the strongest prep uses both in that order.
Disclosure: we build DevInterview.AI, and this is our site. Every price below was checked against vendor pages on September 1, 2026, with sources linked at the bottom.
Quick comparison
| DevInterview.AI | interviewing.io | |
|---|---|---|
| Interviewer | AI, live voice, asks follow-ups and pushes back | Human senior/staff/principal engineer |
| Price | $24.99/mo, $59.99/qtr, $119.99/yr, unlimited | "Interviews start at $179" per session; company-specific costs more |
| Formats | Coding, system design (45 min on a canvas), behavioral | Coding, system design, ML, front end, behavioral |
| Code execution | Real editor, runs Python, Java, C++, JavaScript, C# | Shared editor, anonymous audio |
| Feedback | Scored evaluation across four dimensions plus a hire verdict, every session | Written and verbal feedback from someone who runs real hiring loops |
| Free tier | First full interview free, no card; 19 courses, 2,000+ practice questions | Free AI interviewer and 200+ problems from Beyond Cracking the Coding Interview |
| Scheduling | On demand, any hour | Book a session with a real person |
What interviewing.io actually is
Anonymous mock interviews with senior, staff, and principal engineers from FAANG-tier companies, over audio and a shared editor, under pseudonyms. Sessions are recorded, and a large library of real mock replays is free to watch. It is the feedback ceiling for the category: these are people who make actual hiring decisions.
Know three things before budgeting. Their FAQ says interviews "start at $179," and no full price list is published anywhere on the site; third-party reviews consistently report $225 to $339 for company-specific sessions. Their Pay Later program is paused, by their own blog announcement, so there is currently no advertised way to defer payment. And their multi-session coaching has no published price at all.
To their credit, the refund policy is unusually strong: a full refund if you are unhappy with an interview, no conditions stated.
Where interviewing.io wins
Calibration. An AI does not read a candidate the way a staff engineer who has run hundreds of loops does, and we have said so on every comparison we publish. If you have one week before a Google onsite and budget for exactly one session, their session is worth more than ours. Their free AI interviewer and the Beyond Cracking the Coding Interview problem set are also genuinely good free assets.
Where DevInterview.AI wins
Volume, and everything volume fixes. Interviewing is a performance skill: most people need ten to twenty realistic spoken reps before nerves stop deciding the outcome, and at $179 or more per rep that math does not work with a human. A year of unlimited interviews on DevInterview.AI costs less than one human session. Every session ends with a scored evaluation and a hire verdict, compared against your last one, so you can watch a weakness close over weeks, something one-off sessions with a different interviewer each time cannot give you. And it is on demand: 2 a.m. the night nerves hit, no scheduling.
The sequence that actually works
- Build volume cheaply: a mock a day on DevInterview.AI until the format stops being scary and your evaluations plateau.
- Spend the expensive human session in the final week, as calibration, when the feedback can still change something.
FAQ
How much does interviewing.io cost in 2026?
Their FAQ says interviews start at $179, and prices vary by subject and interviewer. No full price list is published. Third-party reviews report roughly $225 to $339 for company-specific sessions, and coaching package prices are not published at all.
Does interviewing.io still have the Pay Later program?
No. They announced on their own blog that the Pay Later program is paused, and no deferred-payment option is advertised on the site today.
Is an AI mock interview as good as a human one?
For judgment calibration, no, and we do not claim otherwise. For building the skill, AI wins on the only axis that matters there: repetition. Unlimited spoken practice for less than the price of a single human session is what gets you to the interview where the human's judgment is worth paying for.
Can I try both for free?
Yes. DevInterview.AI gives every new account one full interview free with no card, and interviewing.io's AI interviewer with 200+ problems from Beyond Cracking the Coding Interview is free.