Key takeaways
Software engineers who want live human practice should book Interviewing.io, priced from around $179 a session. For unlimited voice-based AI mocks across 24+ roles plus the rest of the job-search pipeline, Four-Leaf runs $20 a month or a $5 one-time pass. Exponent has the best product management course content, and Interview Query the deepest data science library. Out-loud practice is the norm, not a niche habit. A 2020 JDP survey of 2,018 Americans found 70% practice their interview responses out loud.
Read the full video transcript
Transcript of the June 2026 video. Google Interview Warmup, mentioned as the seventh tool, has since been retired by Google. The list below reflects the current lineup.
Read every interview tip and you'll still freeze when it's your turn. What works is reps, out loud.
Here are eight mock interview platforms, grouped by how they actually train you. Live human mocks, AI simulators, delivery coaching, and voice AI.
First, Interviewing.io. Live mocks with real big tech engineers. Second, Exponent. Structured courses, plus peer mock interviews. Third, Final Round AI. An AI simulator with adaptive follow ups. Fourth, Interview Query. The data science specialist, with deep SQL practice. Fifth, Big Interview. Video courses plus AI mocks, often free through school. Sixth, Yoodli. A delivery coach for your pacing and filler words. Seventh, Google Interview Warmup. Free, no signup, answer out loud. And eighth, Four-Leaf. Voice mocks across twenty four plus roles, plus the whole toolkit.
Here's the gap. Real prep means stacking tools. A rep here, a course there. It adds up. Four-Leaf puts it in one place. Mocks, résumé tailoring, comp coaching, and job search. So stop stacking tools. Everything you need to land the interview. That's Four-Leaf.
Prefer to watch. The short version is above. The full breakdown is below.
The companion video goes deeper on how voice-based AI mocks actually work, from real-time transcription to rubric scoring.
Quick picks
If you just want the answer.
- Best for software engineers who want live human practice is Interviewing.io. Anonymous mock interviews with engineers from major tech companies, focused on coding and system design. Expensive per session, but the closest thing to the real interview experience.
- Best all-in-one platform across roles is Four-Leaf at $20 a month, or a $5 one-time 5 Day Pass for a single upcoming interview. Voice-enabled AI mock interviews across 24+ role types plus the rest of the job-search pipeline.
- Best for product management and tech-adjacent courses is Exponent. The strongest structured course content for PM, SWE, and data science interviews, plus peer practice.
- Best for data science and analytics is Interview Query. Specialist platform with the largest data science question library and SQL-specific practice.
- Best free starting point is Google's Gemini Live. Free with a Google account, no commitment, fine for the first 20 minutes of spoken practice.
The rest of this post breaks each one down by role.
Quick comparison
Pricing as of August 2026, checked on each vendor's site. Interview Query figures are from April 2026, since their plans now display only after sign-in. Tool pricing changes frequently, so check each vendor's site for current plans before signing up.
| Tool | Live human option | Voice AI mocks | Role specificity | Course content | Price |
|---|---|---|---|---|---|
| Interviewing.io | ✓ | ✗ | SWE, system design | Limited | from $179/session |
| Four-Leaf | ✗ | ✓ | 24+ roles | Limited | $5 pass / $20/mo |
| Exponent | ✓ (peer) | Limited | SWE, PM, DS | ✓ | around $79/mo |
| Interview Query | ✗ | ✓ | Data science | ✓ | $79/mo |
| Final Round AI | ✗ | ✓ | Multi-role | Limited | $150/mo |
| Big Interview | ✗ | ✓ | Multi-role | ✓ | $39/mo (30-day) |
| Yoodli | ✗ | Delivery only | General comms | ✗ | $8/mo (Pro, annual) |
| Google Gemini Live | ✗ | ✓ | Any role, via prompt | ✗ | Free tier |
What should you look for in a mock interview platform?
Before the list, here is what the Four-Leaf team evaluated.
Role specificity. Generic interview practice produces generic improvement. The best platforms specialize in specific roles or offer role-specific question banks deep enough to actually mirror the real interview.
Live human versus AI. Live mock interviews with humans are still the gold standard for software engineering coding rounds and high-stakes preparation. AI mocks are cheaper, available on demand, and work well for behavioral and product-sense practice. Each has a place.
Feedback quality. Some platforms give scored feedback with specific examples ("your answer lacked a quantified outcome"). Others say "good job" and move on. We looked for actionable, specific feedback.
Cost per rep. A $179 live session is amazing once. A $20 a month subscription that supports 50 reps a month is a different value proposition. Neither is wrong. Both matter for different stages of preparation.
Interviewing.io
Interviewing.io connects you with engineers from companies like Google, Meta, Amazon, and Stripe for anonymous live mock interviews. The product is built around the realization that the best preparation for a coding interview is a coding interview, not a YouTube tutorial.
Sessions are priced individually rather than bundled. Per the Interviewing.io site, individual mocks start around $179 per session, with senior or company-specific interviewers running higher. Packages of multiple sessions are also available. They also offer a free AI Interviewer covering coding and system design, but the paid sessions with industry interviewers are the headline product.
The feedback is the differentiator. After each interview, you get written feedback from the interviewer scoring your performance, plus an audio recording and a transcript. Some interviewers provide hire/no-hire signals as if they were running an actual loop. That bar of feedback is hard to replicate with AI.
The limitation is cost and scope. Interviewing.io is a software engineering tool. There is some product management coverage, but coding and system design are the strongest categories. At $179 and up per session, it is an expensive way to practice frequently. Most people use it for a small number of high-stakes reps before a real interview, not as their daily practice tool.
Pricing starts around $179 per session for engineer-led mocks, with a free AI Interviewer for reps between paid sessions. The fit is software engineers preparing for coding or system design interviews at major tech companies.
Four-Leaf
Four-Leaf takes the opposite approach. Voice-enabled AI mock interviews across 24+ role types, on demand, included in a flat $20 a month subscription that also covers the rest of the job-search pipeline. The interview engine asks follow-up questions, scores responses on content quality, structure, specificity, and clarity, and produces feedback you can act on before the next attempt.
Voice is the underrated piece. Speaking out loud under time pressure is a different skill than typing polished answers, and most AI tools on this list either skip voice entirely or treat it as a paid add-on. Four-Leaf treats it as the default. You hear the question, you answer out loud, the AI responds, and the loop continues for the length of a real interview round.
Role coverage spans software engineering, product management, data science, consulting, finance, marketing, design, and more. Each role uses its own question library and scoring rubric tuned to what actual interviewers ask. The PM library leans heavily on product sense and prioritization. The SWE library covers behavioral and structured technical questions. The data science library includes case-based and SQL-adjacent prompts.
Beyond mock interviews, Four-Leaf bundles resume tailoring, AI cover letter generation, AI job discovery, salary negotiation coaching, an email assistant, and a LinkedIn optimizer. The pitch is straightforward. If you are running an active search, $20 a month for everything beats stacking separate tools at $79 here, $79 there, $179 for a single live session.
The tradeoff is that Four-Leaf does not connect you with live humans. If you need an actual engineer from Google to grade your system design answer, that is Interviewing.io. If you need 50 voice-based reps a month across multiple role types with specific feedback, this is the pitch.
Pricing has two paths. The 5 Day Pass at $5 is a one-time purchase for a single upcoming interview, no auto-renewal, full access for five days. Pro at $20 a month is the recurring plan for an ongoing search, with a 3-day free trial. All features are included on both. The fit is active job seekers who want unlimited voice mock interviews across roles, plus resume, cover letters, and job search in one tool.
Exponent (formerly Pramp)
Exponent built its reputation on peer mock interviews for software engineering, then expanded into product management, data science, and engineering management. The platform combines AI practice with peer matching, structured video courses, and curated question libraries pulled from real interviews at major tech companies.
The course content is genuinely strong. If you are preparing for a PM round at a tech company, Exponent's frameworks, example answers, and breakdowns of the canonical question types are some of the best available anywhere. Same with the SWE system design course. The peer interview matching is unique to Exponent. You schedule a session, get matched with another candidate, and run a mock interview in both directions.
Per Exponent's pricing page, the monthly plan runs around $79 a month. The annual plan brings the effective rate down significantly, especially during their periodic promo windows. A free tier covers sample lessons and a limited number of peer mocks per month.
The limitation is breadth. Exponent is a tech-and-PM tool. If you are preparing for marketing, sales, finance, or general corporate roles, the libraries thin out fast. For tech and PM specifically, the depth is hard to beat.
Pricing is around $79 a month, with annual plans reducing the effective rate. The fit is PM, SWE, and data science candidates at tech companies who want structured courses plus peer practice.
Interview Query
Interview Query specializes in data science and analytics interviews. The question library is the largest in the category for data science specifically, with thousands of real questions from companies like Meta, Amazon, Airbnb, Microsoft, and Stripe. Categories span SQL, statistics, machine learning, product analytics, A/B testing, and case studies.
The product includes AI mock interviews tuned for data science formats, written question practice, SQL practice with a built-in editor, and structured learning paths. Per the Interview Query pricing page (April 2026, plans now display only after sign-in), the IQ Premium plan runs $79 a month on the monthly billing tier, with IQ Coder at $29 a month for coding-only practice and yearly plans that drop the effective rate substantially.
For data science candidates, Interview Query is the strongest specialist on this list. The SQL practice alone justifies the price for anyone preparing for an analytics role with SQL screens. The case study library covers product sense from a data lens, which most other platforms treat as an afterthought.
The limitation is scope. Interview Query is data science only. If your interview loop includes behavioral rounds, system design, or general PM questions outside the data lens, you will need a complementary tool.
Pricing is $79 a month for IQ Premium on the monthly plan, with IQ Coder at $29 a month for coding-only practice. The fit is data science, analytics, and quantitative candidates preparing for technical screens with SQL or statistics components.
Final Round AI
Final Round AI is the most established name in dedicated AI interview prep. The flagship product is the interview simulator, with adaptive follow-up questions, video-based practice, and feedback after each session. The newer interview copilot feature provides real-time guidance during live interviews, which is polarizing in the industry but has driven their growth.
The question database is large (the company claims 10,000+) and covers behavioral, technical, and case categories across software engineering, consulting, finance, and more. The mock interview experience is sophisticated and the AI follow-up logic is among the best in the category for adaptive question flow.
Pricing per finalroundai.com/subscription-simple uses a multi-tier model. The monthly plan is $150 a month with no commitment. The yearly plan brings the effective rate down to $25 a month billed yearly. There's also a quarterly plan at $83.33 a month billed quarterly, a Premium MAX plan at $41.67 a month billed yearly, and a free plan with limited access. Final Round AI also offers a 10% discount for students, veterans, first responders, and recently laid-off candidates.
Pricing is $150 a month on the monthly plan, with the yearly plan reducing the effective rate substantially. The fit is candidates focused primarily on interview practice who want the most established dedicated tool and can commit annually.
Big Interview
Big Interview combines video lessons from a former hiring manager with AI-powered mock interviews. The structured curriculum covers behavioral, situational, case, and industry-specific questions across a wide range of roles. The PracticeAI feature uses your resume or job description to personalize the question set.
The strength is the educational content. Big Interview produces some of the best video training in the category, with structured modules that walk through how to answer common questions step by step. For someone who needs to learn the fundamentals before practicing them, the content is genuinely useful.
Pricing at retail is $39 for a 30-day Interview BootCamp subscription, $99 for a 3-month Interview Accelerator (about $33 a month), or $299 one-time for Interview Pro lifetime access. The redeeming detail is that many universities and career centers have institutional licenses that make Big Interview free for students. If your school offers it, use it. At retail without the institutional discount, the BootCamp tier is the most accessible entry point if you only need a month of prep.
Pricing starts at $39 for the 30-day BootCamp at retail, often free through universities. The fit is students who get it free through their school's career center, or candidates who value structured video training alongside practice.
Yoodli
Yoodli takes a different angle. Instead of evaluating what you say, it evaluates how you say it. The AI tracks your speaking pace, filler words ("um," "like," "you know"), eye contact, sentence structure, and overall delivery. It is a communication coach, not an interview content coach.
This is genuinely useful for people who know their material but struggle with delivery. If you say "um" 40+ times in a two-minute answer (more common than you would think), Yoodli will surface it. If you speak too fast under pressure, the pacing analytics flag it. The free Starter tier covers 5 lifetime sessions. Pro is $8 a month billed annually for up to 10 roleplays a week, and Advanced is $20 a month billed annually for unlimited roleplays.
The limitation is clear. Yoodli will not help you structure a better answer to "tell me about a time you led a cross-functional project." It does not evaluate content quality, STAR method usage, or technical accuracy. Pair it with a content-focused tool for full coverage.
Pricing has a free tier, with paid plans for advanced features. The fit is candidates who know their content but want to fix delivery, pacing, and filler words.
Google Gemini Live
Google has retired Interview Warmup, the free no-signup practice tool that used to hold this slot. As of August 2026 the tool's page no longer resolves, and Google's own interview prep guidance points job seekers to Gemini Live for spoken practice instead.
Gemini Live holds a real-time voice conversation. Ask it to interview you for your target role and it asks questions out loud, listens to your spoken answers, and gives feedback on your responses. Per Google's job search guidance, it can simulate a real-time conversational interview with structured feedback. The Gemini app's free tier includes Gemini Live with a Google account.
The limitation is the one every general assistant shares. There is no fixed rubric, no score tracking across sessions, and the interview stays on track only as long as your prompt does. For a first spoken rep it removes every barrier to getting started. For structured improvement you will want a dedicated tool within a week.
Pricing is free with a Google account, with paid Gemini plans for heavier usage. The fit is absolute beginners who want zero-commitment spoken practice inside a tool they may already use.
Which mock interview platform fits your role?
The right platform depends on the interview type.
Software engineering (coding, system design). Interviewing.io for high-stakes live practice with industry engineers. Exponent for structured system design courses. Four-Leaf for unlimited voice-based behavioral and technical practice on demand.
Product management. Exponent for the strongest course content. Four-Leaf for unlimited PM voice mocks across product sense, analytical, and behavioral categories. Final Round AI for adaptive AI follow-ups if interview practice is your only need.
Data science and analytics. Interview Query for SQL and stats practice and the deepest data science question library. Four-Leaf for behavioral and case-based voice practice.
Generalist roles (corporate, marketing, sales, finance). Four-Leaf for broad role coverage. Big Interview if free through your university. Final Round AI on annual billing if you want a dedicated AI tool.
Communication and delivery. Yoodli for filler-word and pacing analysis, paired with a content-focused tool from one of the categories above.
Which mock interview platforms are free in 2026?
Seven of the eight offer some free path. Only Interview Query does not. What "free" buys you varies enough that the label is close to meaningless, so here is what each one actually gives you.
Google Gemini Live is free with a Google account. It holds a real-time voice conversation, so it is the best zero-commitment way to hear yourself answer out loud for the first time. It has no role-specific question bank and no score tracking across sessions, so it tells you how one answer felt rather than whether you are improving.
Yoodli's free Starter tier covers 5 lifetime sessions. That is enough to get a read on filler words and pacing and not enough for a search.
Exponent's free tier covers sample lessons and a limited number of peer mocks per month. Peer mocks are the only free option here where another human asks the follow-up question, which is the part AI tools still find hardest to imitate.
Big Interview is often free through a university or career center's institutional license. At retail it starts at $39 for a 30-day BootCamp, so check whether your school covers it before paying.
Final Round AI has a free plan with limited access, Interviewing.io offers a free AI Interviewer alongside its paid engineer-led sessions, and Four-Leaf runs a 3-day trial with every feature unlocked.
One caveat applies to all seven. Whether the cap is sessions, features, days, or who qualifies, every free path here has one, and most candidates who are actively interviewing hit it inside a week.
How we compared
We evaluated each platform by role, on live-versus-AI practice, feedback quality, and cost per rep. The pricing and feature details come from each platform's own site, checked firsthand, and the figures are the vendor-listed rates dated in the Quick comparison table near the top of this post. Tool pricing changes often, so confirm on the vendor's page before you buy. There are no affiliate links and no sponsored placements. Four-Leaf is our own product, and we use the same format and the same scrutiny for it as for every other platform on the list.
For broader context on the 2026 hiring market behind these tools, see our own research, the AI-Era Hiring Index.
How to choose
Three scenarios.
You need a small number of high-stakes reps before a specific software engineering interview. Interviewing.io for the most realistic simulation, supplemented with Exponent's system design course and Four-Leaf for unlimited cheaper practice in between sessions.
You are running an active search and want unlimited voice-based mock interviews across roles plus the rest of the pipeline. Four-Leaf at $20 a month is the lowest-cost path to that combination. Pair with Yoodli's free tier if you also want delivery coaching.
You are preparing for a specialized role (data science, PM at a tech company). Interview Query for data science. Exponent for PM at a tech company. Add Four-Leaf or Final Round AI annually for additional reps if your budget supports it.
Whatever you pick, the platform only matters if you actually do reps. The single biggest predictor of interview performance is hours practiced out loud, not which tool you used. Pick the platform that makes the next rep the path of least resistance, then put in the volume.
Related reading
- Best AI interview prep tools in 2026, 10 compared covers a broader set of interview prep tools beyond mock interview specialists.
- How to practice for a job interview by yourself covers solo practice techniques that pair with any of these platforms.
- Product manager interview questions covers the most common PM questions and what interviewers actually score.
- Try Four-Leaf's voice mock interviews directly to see role-specific AI practice with structured feedback.