The Best Mock Interview Tools in 2026: A Full Comparison
David Park
Product Manager
There are more mock interview tools in 2026 than there are rounds in a FAANG loop, and most comparisons of them are a feature list with an affiliate link at the bottom. This one is written by a team that builds one of them, so treat the Devana section with the scepticism it deserves. Everything else is a straight description of what each tool does, the criteria are stated up front so you can disagree with them, and the numbers in the statistics section are measured rather than estimated.
The six tools compared
Pramp is included inside Exponent: it was acquired in 2021 and its sessions now run on the Exponent platform as Exponent Practice.
How we judged them
Most feature lists compare the wrong things. Problem count stops mattering somewhere around the first few hundred. What decides whether a tool changes your interview results is narrower than that, and these four criteria carry the rest of this article.
| Criterion | Why it matters | How to test it in 5 minutes |
|---|---|---|
| Do you speak out loud? | Silent solving trains the one skill you probably already have | Start a session and see whether your microphone is used at all |
| Does something interrupt you? | Real interviewers ask why halfway through, and that is where people freeze | Go quiet for thirty seconds and see whether anything happens |
| Does your code actually run? | A grade from something that only read your code is a guess | Submit code with a deliberate off-by-one and see if it is caught |
| Can you use it tonight? | Practice you have to schedule is practice you will postpone | Try to begin a session at 11pm on a Sunday |
The comparison, in four parts
One giant table hides more than it shows, so this is split by theme. Amber means the tool does this in a limited form or on a specific plan. Capabilities as they stand in 2026: all of these products ship changes, so check the current feature list before paying for anything.
Part 1: practice format
| Tool | Speak aloud | Interrupts you | Live voice | On demand |
|---|---|---|---|---|
| No | No | No | Yes | |
| No | No | No | Yes | |
| No | No | No | Yes | |
| Yes | Yes | Yes | Matched | |
| Yes | Yes | Yes | Booked | |
| Yes | Yes | Yes | Yes |
Part 2: content and coverage
| Tool | Company sets | System design | Behavioural | Role filtering |
|---|---|---|---|---|
| Yes | Written | No | By topic | |
| By skill | No | No | Yes | |
| By role | No | No | Yes | |
| Yes | Yes | Yes | Yes | |
| Yes | Yes | Yes | Yes | |
| Yes | Yes | Yes | Yes |
Part 3: feedback and grading
| Tool | Runs your code | Written feedback | Human judgement | Transcript |
|---|---|---|---|---|
| Yes | Pass or fail | No | No | |
| Yes | Score | No | No | |
| Yes | Yes | No | No | |
| Shared editor | Yes | Peer | Yes | |
| Shared editor | Yes | Yes | Yes | |
| Yes | Yes | No | Yes |
Part 4: access
| Tool | Free tier | Needs a partner | Needs scheduling | Sessions per week realistically |
|---|---|---|---|---|
| Yes | No | No | Unlimited, but silent | |
| Yes | No | No | Unlimited, but silent | |
| Yes | No | No | Unlimited, but silent | |
| Credits | Yes | Yes | 1 to 3 | |
| Limited | Yes | Yes | 1 to 2 | |
| Yes | No | No | As many as you will do |
A row of green is not proof of quality and you should not read it as one. It says the capability exists, not that it is the best version of that capability. The one column Devana cannot fill is human judgement, and that is not a small thing.
Capability profile
The same information as a shape. Three tools, one from each category, scored zero to one on the six axes. These scores are our reading of publicly documented capabilities, not a measurement, and the shapes are more useful than the numbers: they show that these products are not competing on the same axes at all.
The three categories
Set the branding aside and there are three kinds of product here, each solving a different problem. The bar below is what each category actually trains.
Problem archives
LeetCode, HackerRank and CodeSignal are the best in the world at what they do, which is technique. You cannot talk your way through a problem you have no method for, and method comes from volume. LeetCode's company tagging and discussion threads remain the deepest available anywhere. CodeSignal and HackerRank carry an extra advantage: you may well sit their assessments for real, and practising in the interface you will be judged in is worth something on its own.
What none of them do is make you say anything. If you want walkthroughs of this material explained aloud, NeetCode and Back To Back SWE are the two channels worth your time, and both are free.
Peer and human mocks
Exponent pairs you with another candidate and you take turns interviewing each other. This is where Pramp went: Exponent acquired it in 2021, and since 2024 Pramp sessions run on the Exponent platform as Exponent Practice, which is why you will still see both names in older comparisons. interviewing.io goes further and puts you in front of working engineers from the companies you are targeting, anonymously.
This category produces the best single session available anywhere. Someone who has sat on the other side of a hiring committee notices that you hedge when unsure, or that your explanations sharpen once you start drawing. No model does that. The catch is arithmetic: sessions are scheduled, capped by other people's calendars, and in the peer case your feedback is only as good as whoever you were matched with. Both publish recorded mock interviews on YouTube: Exponent and interviewing.io's channel is the closest thing to watching a real loop from the inside.
AI interviewers
The newest category and the one with the widest quality spread. Some are a chat box with a prompt behind them. The ones worth using hold a voice conversation, interrupt, follow up on what you actually said, and execute the code you wrote instead of judging it by eye.
"Beware of bugs in the above code; I have only proved it correct, not tried it."
- Donald Knuth, in a note to Peter van Emde Boas, 1977
That is the single best test to apply to any AI interview tool. If it grades your solution without running it, it has proved it correct and not tried it, and you should discount the score accordingly.
Statistics: what a company-tagged question bank actually looks like
Most comparison articles quote interview statistics from other comparison articles. The numbers below are different: they are counted directly from Devana's own question bank as it stands today, so you can hold us to them. Every figure here is a measurement of a real data set of 1,704 questions across 46 companies.
Coverage by company
The mix of rounds
| Coding | 564 | 33.1% | |
| Technical discussion | 481 | 28.2% | |
| System design | 357 | 21.0% | |
| Behavioural | 302 | 17.7% |
Two thirds of the bank is not a coding puzzle. That ratio is the argument against preparing only with a problem archive, put as plainly as we can put it: system design and behavioural rounds together are 39 percent of the questions, and an archive covers neither.
Difficulty, and what is missing from it
Consistency beats intensity
The last chart is the one that decides which tool you should pick, and it is not about features at all. Spoken performance is closer to a motor skill than a body of knowledge, and motor skills consolidate between sessions rather than during them.
That gap is why the access column in the fourth table matters more than any feature. A tool you can only use once a week, because it needs a partner and a calendar slot, is competing against one you can open at eleven at night. Total practice is the product of quality per session and sessions completed, and most people lose on the second term.
Where Devana is different
This is the part where we have an interest, so here it is as specifically as we can put it. Four things, each of which you can check in a single free session.
| What | What it means in a session |
|---|---|
| A voice interviewer that interrupts | Josh talks, asks why you chose that, and follows up on your answer rather than reading from a script. You talk back. Nothing is typed into a chat box. |
| Your code is executed, not eyeballed | Run and Submit compile and run against test cases that were themselves checked against a working reference solution. Python, JavaScript, TypeScript, Java and C++. |
| Graded against the question's own bar | Where a question cannot be executed, a class driven through a sequence of calls or a design, the grader receives that question's real constraints and worked examples, so a correct alternative approach is credited rather than marked down for not matching one expected answer. |
| A plan, not a pile of questions | Tell it your role, experience, target companies and how long you have. It builds a day by day calendar of sessions tagged to those companies, up to your target date, and checks each day off as you go. |
๐ The honest limitation
An AI interviewer does not make you nervous, and part of what makes a real interview hard is that a person whose opinion matters is watching. It also has not sat in a specific company's debrief. Those two gaps are structural and we cannot close them. If you have the budget and the time for one human mock before a loop, take it. Use the AI to arrive at that session already steady, so their judgement lands on your performance rather than on your nerves.
What the people who hire actually look for
"Smart, and gets things done."
- Joel Spolsky, The Guerrilla Guide to Interviewing, later expanded into Smart and Gets Things Done (2007)
Spolsky's two-part test has survived twenty-five years because it describes what an interview is trying to find out, and neither half is measured by a green tick on a submission. "Smart" is demonstrated by how you reason out loud when the problem is unfamiliar. "Gets things done" is demonstrated by finishing, testing, and saying what you would do differently. A tool that only tells you whether the tests passed has measured neither.
Honest picks by situation
| If you are | Use | Because |
|---|---|---|
| Six months out, weak on technique | LeetCode | Nothing beats volume for pattern recognition, and it is cheap |
| Solving fine, failing interviews | Devana, daily | The gap is speaking under observation, and that needs repetition, not more problems |
| Two weeks from a specific loop | interviewing.io, plus daily AI mocks | A real engineer's read is worth paying for once you have a steady baseline |
| On no budget at all | Exponent Practice, plus a free tier | Peer practice costs nothing but your time and reciprocity |
| Sitting a real CodeSignal or HackerRank test | That platform | Practise in the interface you will actually be assessed in |
| Preparing for system design specifically | Devana or interviewing.io, plus ByteByteGo | This round is discussed, not typed, so reading write-ups alone will not transfer |
Common questions
Is Pramp still available?
Yes, but as part of Exponent. Exponent acquired Pramp in 2021 and since 2024 new sessions run on the Exponent platform as Exponent Practice. Older comparisons list them separately, which is why you will see both names.
Can an AI interviewer replace a human one?
Not on judgement, and anyone telling you otherwise is selling something. It replaces the frequency a human cannot offer. The useful order is AI mocks daily to build the habit, then one or two human sessions in the fortnight before a real loop.
How many mock interviews do I actually need?
Fewer than people think, if you review them. Most of the value is in reading the transcript and carrying one habit into the next session. Ten reviewed sessions beat forty unreviewed ones.
Do these tools use real company interview questions?
Be careful with anyone claiming they do. Devana's company sets are modelled on how each company is known to interview, based on published processes and reported candidate experience, and are not transcripts of a specific company's question list. Treat any platform promising literal leaked questions with suspicion.
The verdict
Most people reading a list like this already have the technique. They have four hundred problems solved and a rejection email, and they are looking for a tool because they suspect the problem is not the algorithms. It usually is not.
So the choice is less about which product has the longest feature list and more about which one you will still be using in three weeks. Pick the one that puts the smallest gap between deciding to practise and actually speaking out loud, and give it a real run before you judge it. If that turns out to be someone else's product, you will still have fixed the thing that was costing you offers.
Try it against this list
Devana's free tier includes three full interviews a month, no card required. That is enough to check every claim in the section above: whether the interviewer really interrupts, whether your code really runs, and whether the feedback references the question's stated requirements or just says "good job".
