Verdict: buy one session, not a program. interviewing.io gives you the best interview feedback money can buy for software engineers, from people who make real hiring decisions. It also charges roughly $180 to $340 for a single problem on a single evening. That combination makes it excellent for checking where you stand a week before an onsite, and a poor way to actually build the skill, because building it takes reps and reps at this price are not a thing anyone does.
Disclosure: we build DevInterview.AI, which competes with them on practice volume. This review says plainly where they are better. Everything below was checked against their own pages and 2026 third-party reviews in August 2026; sources are at the bottom.
What you actually get
- Anonymous mocks with real interviewers. Senior, staff, and principal engineers who make hiring decisions at FAANG and FAANG-adjacent companies (Meta, Google, Amazon, OpenAI, Netflix, Stripe, Uber). Audio and shared editor, no video.
- Formats: algorithms, system design, machine learning, front-end, behavioral, engineering management.
- Coaching packages: 3, 5, or 10 sessions aimed at a specific company.
- A free tier that is genuinely good: a free AI interviewer for coding and system design, a free peer-matching queue, and 200+ problems from Beyond Cracking the Coding Interview including nine free chapters.
- Unmask-and-advance: perform well and you can reveal yourself to companies hiring through the platform.
What it costs
interviewing.io does not publish prices publicly, which is itself worth knowing before you budget. Third-party reviews through 2026 consistently report roughly $180 to $340 per session, varying with interviewer seniority, and multi-session coaching packages around $2,000. They periodically discount packages, and offer a pay-later program that defers payment until you are employed.
What it is genuinely best at
Feedback quality is the ceiling for this category. An engineer who has run hundreds of real loops notices things no rubric captures: that you answered a question you were not asked, that your confidence dropped after the hint, that your clarifying questions sounded rehearsed. That is what you are buying, and nothing else on the market matches it. If you can only do one thing before a Google onsite, doing it here is a defensible choice.
Anonymity works. Being judged without your resume, your accent, or your current employer in the room removes a real source of noise, and it makes the feedback easier to trust.
The honest limitations
One session is one problem. This is the part people underestimate. At $180 to $340, you are buying a single question, in a single format, on a single evening. Two sessions and you have seen two problems. Interviewing is a volume skill, and the arithmetic simply does not allow volume here.
No continuity between sessions. You draw a different interviewer each time, with a different style and a different mental rubric. That is fine for a spot check and bad for measuring progress: there is no consistent scale telling you whether the thing you were told to fix last month is actually fixed.
Scheduling. Sessions are booked against real humans in real time zones, so practice happens when an engineer is free, not when you are. That gets harder the closer you get to an onsite, which is exactly when you want reps.
Variance. Interviewers are individuals. Most reviews are strong, but the experience depends on who you draw, and at this price a mediocre draw stings.
Opaque pricing. Not being able to see the cost before signing up is real friction, and it is why every figure above is attributed rather than quoted.
Who should buy it
Worth it if you have an onsite in the next two weeks, you have already done your volume practice somewhere cheaper, and you want an expert read on where you actually stand. One or two sessions in that spot is money well spent.
Not worth it if you are early in prep, you freeze when explaining your thinking, or you need repetition. You will spend several hundred dollars learning what is wrong and have nothing left over to fix it with.
The cheaper way to get the reps
This is where we compete, so weigh it accordingly.
DevInterview.AI runs unlimited live voice mock interviews: 30-minute coding rounds in a real editor with execution, 45-minute system design on a canvas, and behavioral in STAR format. Every session ends with scores across four dimensions, a hire verdict, and feedback pointed at specific moments in your session rather than a generic rubric, on the same scale every time, so progress is something you can actually see between sessions.
The free tier is not a trial stub: all 19 courses and 95 lessons, a 2,000+ question practice bank with AI feedback, daily AI evaluations, practice plans, and one full mock interview. Unlimited interviews are $19.99 a month or $99.99 a year, which is less than a tenth of one human session.
What we do not claim: that an AI reads you the way a staff engineer does. It does not, and for that specific job interviewing.io is better than us. The pattern that works for most people is volume on something cheap, measured on a consistent scale, then one human session to calibrate before the real thing.
Free alternatives worth knowing: Exponent Practice (formerly Pramp) for peer mocks, and interviewing.io's own free AI interviewer.
Verdict
A genuinely excellent product aimed at a narrow moment in your prep. Buy a session before an onsite; do not buy a program to learn with. For the full landscape, see our interviewing.io alternatives comparison.
FAQ
How much does interviewing.io cost?
They do not publish prices publicly. Third-party reviews in 2026 report roughly $180 to $340 per session depending on interviewer seniority, with multi-session coaching packages around $2,000. A free tier exists, including an AI interviewer, a peer-matching queue, and 200+ problems from Beyond Cracking the Coding Interview.
Is interviewing.io worth it?
For one or two sessions shortly before a real onsite, yes: the feedback from engineers who run actual hiring loops is the best available. For building the skill from scratch it is a poor fit, because that takes ten to twenty reps and one session buys you one problem.
Is interviewing.io really anonymous?
Yes. Sessions run over audio and a shared editor with no video, and your identity is hidden from the interviewer. If the session goes well you can choose to unmask and move toward an onsite with companies hiring through the platform.
What is the cheapest alternative to interviewing.io?
Free: Exponent Practice peer mocks and interviewing.io's own free AI interviewer. For unlimited live voice practice, DevInterview.AI is $19.99 a month or $99.99 a year with the first interview free, and its courses and 2,000+ question practice bank are free with no card.
How many mock interviews do I actually need?
Most people need somewhere between ten and twenty realistic reps before nerves stop deciding the outcome. That number is the whole argument for doing volume somewhere cheap and saving the expensive human session for the week of your onsite.