Which AI tool is best for interview preparation?

Updated Oct 22, 2026 · 11 min read

Which AI is best for interview preparation depends on what you need to practise. Pick a spoken mock interview that asks follow-ups and scores your answers (Just One Interview, Huru or Revarta), a free voice assistant for quick rehearsal (Gemini Live or ChatGPT voice), or human or peer mocks for technical rounds (interviewing.io or Aced).

Below, the real options are compared using prices and free tiers read from each tool's own pages on 22 October 2026. We make Just One Interview, our interview practice app, and it sits in the same table as the rest.

AI interview practice tools compared, October 2026

The table groups tools by type and is not a ranking. The last column is the lowest paid price each tool's own page showed on 22 October 2026, signed out, in US dollars. Prices can change with region, promo codes and sign-in. "Not stated" means the tool's pages do not say.

Pages behind the table: Huru, Revarta, Final Round AI and its plans page, Interview Sidekick, LinkJob, Big Interview, Yoodli, interviewing.io, Aced, Pramp, ChatGPT voice, Gemini Live and Microsoft Copilot voice. For Just One Interview, open the app to see current plans.

Two price notes. The Final Round AI plans page also says to sign in to reveal today's discount, so a signed-in price may differ. Revarta says its prices are adjusted for many countries, so the amount you see depends on where you are.

What makes a prep tool different from a chat window

A prep tool runs the interview itself, while a chat assistant answers what you ask it. A chat assistant can list likely questions for a role and review an answer you type out, which is useful for planning. It stops short of the part that decides real interviews: saying an answer out loud with a follow-up coming that you did not see. Reading a good answer and delivering one are separate skills, and only the second one gets tested on the day.

A dedicated prep tool asks questions built from the role, listens to your spoken answer, asks a follow-up based on what you actually said, and gives you a report on your answers. Huru, Revarta and Just One Interview all describe this kind of spoken mock. That feedback loop is the point.

Can I just use ChatGPT to prepare?

Yes, for part of it. ChatGPT and Gemini are good at generating a question list from a job description, suggesting how to structure an answer, and pointing out where a written answer is vague. With their voice modes they can also play the interviewer if you ask them to.

Where they fall short is the interview itself. ChatGPT voice and Gemini Live are general assistants with a spoken mode, not interview products, and neither has interview scoring built in. The feedback you get depends on how you prompt them. The free plans also have limits: ChatGPT voice has limited access on Free, and Gemini Live runs in the Gemini app on Android and iPhone, and not in the Gemini web app.

The practical approach is to use both. Plan with a chat assistant, then rehearse with a tool that runs the actual conversation. Candidates who only do the first half arrive with good answers they have never said out loud.

Which free AI tools can you practise with?

Several. Gemini Live, ChatGPT voice and Microsoft Copilot voice have free tiers, and Huru, Revarta, Yoodli, Aced, Pramp and Just One Interview each offer free practice. Here is what each one gives you.

Gemini Live is listed on Google's Free plan. ChatGPT voice is on the Free plan with limited access, and OpenAI says the limits may change. Microsoft Copilot has a free tier with a Microsoft account, and its voice support page says voice conversations may have session limits.

Huru says every feature for job seekers costs nothing, with a live AI interviewer and no cap on mock interviews. Revarta gives every new account 2 free mock interviews and 2 free practice questions, with no expiry and no card. Yoodli Starter is free for up to 5 roleplays in total, and any session over 30 seconds counts as one. Just One Interview is free to start with no card, runs a spoken practice interview in your browser, asks follow-up questions and gives a scored report in English.

For peer practice, Aced has a free Basic plan with 5 peer mocks a month and no card, and Pramp says its peer sessions are still free and now run on Aced Practice. Google Interview Warmup is retired, so it is not on this list. Our guide to Google Interview Warmup alternatives covers what changed in April 2026 and what to use instead.

Do free practice tools work as well as paid ones?

For most people preparing for one specific interview, a free tier is enough, as long as it lets you finish a whole interview and see the full report. Just One Interview, our interview practice app, is free to start, runs a full practice round with a scored report, and works in the browser on your phone.

Paid plans mostly buy volume and extras rather than a better interview, so read what the free tier includes. Final Round AI says its practice interview sessions need a paid plan, and Interview Sidekick says its free Basic plan has limited prep sessions. If you have one interview coming up, a short pass can cost less than a monthly plan. Revarta sells a 7-day pass for 19 dollars with no renewal. Interview Sidekick sells a one-week pass for 50 dollars that renews weekly, so cancel after the week you need. If a tool shows a score but hides the reasoning behind it, its free version is not testing the thing you want to test.

Which AI is best for technical interview questions?

No single AI covers every technical round, so match the tool to the round. Use human or peer mocks for coding and system design, a coding tool for the code itself, and a spoken mock to practise explaining your approach out loud.

interviewing.io runs anonymous human mock interviews with engineers from companies such as Meta, Google and Amazon, in a coding editor with audio and chat. It says these start at 179 dollars, and the price varies with the subject and whether you want an interviewer from a specific company. Its AI Interviewer, which it describes as a FAANG-style mock for coding and system design, is free. We could not read its AI Interviewer page without signing in, so we cannot say if it is spoken.

Aced, formerly Exponent, offers peer mock interviews, with AI mocks on its Expert plan. Its data structures and algorithms, SQL and frontend mocks include a built-in code editor. The old tryexponent.com address now redirects to aced.io. Pramp is now part of Aced: since July 2024 new Pramp sessions run on Aced Practice, where you and a peer interview each other for 30 to 45 minutes.

A voice mock helps with the part those tools leave to you, which is explaining your approach out loud. Revarta says it does not run live coding rounds, and the Huru and Big Interview pages we read mention no coding editor. Final Round AI and Interview Sidekick list coding and system design among their mock types. Check anything technical a chat assistant tells you against a reliable source.

What about tools that answer for you during a real interview?

Some tools are built to give you answers while a live interview is happening, and that is a different product from practice. Final Round AI describes its Interview CoPilot as an assistant that "delivers real-time answers in a private window only you can see". Interview Sidekick says it "gives you discreet, real-time answers during your actual interviews". LinkJob markets "stealthy AI assistance during live interviews". All three also sell mock interview practice.

Employers, and the AI interviewers some of them use, may treat on-screen answers during an interview as cheating. A candidate who relies on them has also not practised, so the first follow-up they did not expect arrives with nothing behind it. If an interview has rules about outside help, follow them. For how hiring teams see this, read how recruiters spot AI help in interviews. A mock interview before the real one gives you the preparation without that risk.

What to look for

A good practice tool does six things.

• It runs a real spoken interview rather than a typing exercise.
• Questions come from the role or job description you give it, not a generic bank.
• It asks follow-up questions based on your answers.
• The report shows the reasoning behind each score, not one overall number.
• The report quotes what you said, so you can check it.
• You can run it again after you read the report.

How to use it so it helps

Treat the practice run like the real interview. Sit in a quiet room, use the microphone you will use on the day, and answer out loud in full sentences rather than in your head. One complete run tells you more than an hour of reading sample answers.

Then read the report for patterns rather than for the score. If two answers were marked thin for the same reason, that reason is your work for the week.

How often should you practise? Do one full run first, fix the two weakest answers, then run it again a few days later and check whether that specific thing improved. For one interview, two or three focused runs spread over a week is a sensible target, so you have time to change the thin answers.

If you only have one evening, do a full practice run first, before you read anything. It is uncomfortable, and it is the fastest way to find out which two answers are weak.

If you are hiring, not preparing

If you are a recruiter comparing AI interviewers for screening, those are different products from the practice tools above. Our guide to compare AI interview vendors covers what to ask each vendor, and AI interview tools compared lines the tools up side by side.