Best AI Interview Assistant for Coding Interviews: 7 Tools Compared

The best AI interview assistant for coding interviews makes you solve problems out loud, explains the approach and its complexity when you're stuck, and drills the follow-up questions interviewers really ask. Our pick is CoPilot Interview, which pairs a scored Mock Interview with a coding mode that returns complete code, complexity and an example run, on a free plan of 15 minutes a day; interviewing.io's free AI Interviewer and Hello Interview's Guided Practice are the strongest alternatives for practice.

This guide compares seven tools on what decides coding prep: whether they explain the approach, give hints or full solutions, which languages they cover, whether they explain time and space complexity, how they handle follow-ups, and what they cost. Every competitor fact comes from the vendor's own site, checked October 2026. It is part of our research library on the state of AI interview assistants in 2026. If you want problem banks such as LeetCode and NeetCode rather than AI tools, read our roundup of coding interview prep tools instead.

The 7 best AI tools for coding interview practice at a glance

Disclosure: we make CoPilot Interview. It is listed first and marked Best choice where we think that's accurate; its limits are listed in its review below. "Not stated" means the vendor doesn't say on its own site.

Prices are in USD and change often, so confirm on each vendor's pricing page before you buy. For the full category, including tools that focus on behavioral rounds, see our 15-tool comparison, checked October 2026.

What should an AI coding interview tool do?

An AI interview assistant is software that uses speech-to-text and a large language model to run practice interviews, suggest structured answers and give feedback. For coding rounds, a feature list matters less than whether the tool trains the skills interviewers score. Check these six things:

• It makes you talk. Interviewers grade how you reason out loud, not only the final code. A tool that reads the question aloud and listens to your spoken answer trains that; a chat box doesn't.
• It explains, not just answers. You want the pattern behind the solution (two pointers, sliding window, BFS) so you can spot it in the next problem. Our guide to 15 LeetCode patterns lists the common ones.
• It can hold back. Full solutions are useful after an attempt. Before one, they rob you of the struggle that builds recall. Prefer a tool that lets you answer first, or one you can tell to give a single hint.
• It covers your language. Practice in the language you'll use on the day, including its standard library quirks.
• It explains complexity. Almost every coding round ends with "what's the time and space complexity, and can you do better?"
• It drills follow-ups. "What if the input doesn't fit in memory?" and "how would you test this?" separate a pass from a strong pass.

Our explainer on how AI tools handle coding vs conceptual questions goes deeper into why the same tool can be strong on one and weak on the other.

How each AI coding interview tool compares

1. CoPilot Interview: Best choice for spoken coding practice

CoPilot Interview is a desktop app for Windows 10+ and macOS 12+ with four modes. For coding prep, start with Mock Interview: add your résumé and the job description, choose the level, 3, 5 or 8 questions, the mix (behavioral, technical, system design, coding), your coding language and an optional focus. It reads each question aloud, listens to your answer and scores it out of 10 with what worked, what to fix and a model answer, then gives you a report card. Coding questions never auto-submit, so you can think in silence before you speak.

Its coding mode returns complete code in your chosen language, with its complexity and an example run. That makes it a fast way to check your own solution after an attempt. Dual AI Mode, on Standard and above, shows two models' answers side by side, which helps when you want to compare two approaches to the same problem.

• Strengths: a free plan that isn't a trial (15 minutes every day, all four modes, no card or signup); questions built from your own résumé and job description; one tool that also covers the behavioral and system design rounds in the same loop.
• Limits: no human coach or human feedback; the full app is desktop only (Windows and macOS), with the Android companion still a beta outside Google Play; free sessions stop at 15 minutes; it isn't a problem bank, so you still need a list such as NeetCode 150 for volume.
• Price: Free $0; Standard $14.99/mo on sale (regular $19.99) with 60-minute sessions, up to 100 minutes a day and no gap between sessions; Pro $29.99/mo adds ChatGPT and Gemini models; Pro+ $49.99/mo adds Claude. See pricing.

For the coding-specific features, see CoPilot Interview's coding interview copilot. CoPilot Interview isn't affiliated with Microsoft Copilot or GitHub Copilot.

2. interviewing.io: best free FAANG-style AI round

Per its site, interviewing.io's AI Interviewer runs coding and system design interviews in the style of a FAANG mock and gives feedback at the end, free. It also offers 200+ problems from Beyond Cracking the Coding Interview. Its paid product is anonymous mock interviews with senior engineers from large tech companies, starting at $179 a session, with audio and chat but no video.

Strengths: a realistic interview format at no cost, and a clear path to a human interviewer when you're ready. Limits: the site doesn't say which languages the AI Interviewer supports or how it scores, and human sessions get expensive as a daily habit.

3. Hello Interview: best for AI-enabled coding rounds

Hello Interview's Premium includes system design, low-level design, coding, AI coding and behavioral courses, an AI tutor that answers questions as you study, and 66 Guided Practice problems. Its AI-Enabled Coding track has 12 problems of about 45 minutes each, graded on your prompts, your review and your final code. That matches the newer interview format where you code with an AI tool and are judged on how you direct and check it, covered in our guide to the Meta AI-enabled coding interview.

Price, checked October 22, 2026: $47 for 1 month (shown against $59), $89 for a year (shown against $119) or $299 lifetime, one-time payments. Limits: its strongest AI interviewer, Live Practice, is a system design product; for classic algorithm rounds it is mainly a course.

4. Aced (formerly Exponent): best for rubric-scored voice mocks

Aced's AI mock interviews connect you by audio to an AI interviewer for product management, behavioral, system design, data structures and algorithms, SQL and investment banking interviews. The algorithms and SQL interviews include a code editor, and you get a scored rubric on criteria such as communication, problem-solving and structured thinking. AI feedback and transcripts need a paid membership: AI mock interviews are listed on the Expert plan at $99/mo, or $20/mo billed annually, as of October 2026.

Strengths: voice practice plus a large course library and peer mocks. Limits: the AI features sit on the top plan, and memberships are refundable only within 5 days of purchase.

5. Final Round AI: best for a broad paid suite

Final Round AI's coding page describes hints, debugging and solutions, says it gives "detailed logic for every suggestion", and names Python, JavaScript, Java and C++ "and more". Its wider product includes eight practice-interview scenarios and automatic debriefs. As of October 2026, Pro costs $25/mo billed annually ($300) or $150 month to month, and the free plan covers preparation only.

Strengths: the broadest paid suite in this list. Limits: you can't try live features without paying, and its coding page focuses on live use rather than practice.

6. LockedIn AI: best language coverage and device range

LockedIn AI's coding page lists 12 languages (Python, JavaScript, TypeScript, Java, C++, Go, Rust, Kotlin, Ruby, SQL, PHP and Scala), step-by-step breakdowns of the approach, and time and space complexity "ready to explain". It also has a VS Code extension and a separate AI interviewer for mock interviews. It runs on Windows, macOS, the web, iOS and Android.

Price, as of October 2026: a free plan with 5-minute sessions, up to 60 minutes a day and no card; unlimited plans from $54.99/mo, or $39.99/mo billed every 3 months. LockedIn AI rotates offers, so check its pricing page on the day you buy. Limits: no hints-only mode is described, and a 5-minute free session is too short for a full coding mock.

7. ChatGPT or Claude: best free explainer you control

General chatbots are excellent tutors when you set the rules. Ask for one hint at a time, ask it to critique your solution before showing its own, or ask for three follow-up questions an interviewer might ask. Both have free plans. As of October 2026, ChatGPT Plus is $20/mo per OpenAI's help center, and Claude Pro is $20/mo or $17/mo billed annually per Claude's pricing page.

Limits: neither runs a timed spoken mock, scores you against an interview rubric or knows your résumé unless you paste it each time, and both can state a wrong complexity confidently. Check every claim with our Big-O complexity visualizer.

Practice it: a 5-day AI coding practice routine

Tools only help if the routine is right. This plan fits inside CoPilot Interview's free 15 minutes a day, with your problem list doing the heavy lifting.

1. Day 1, patterns. Skim the free coding interview cheat sheet and pick two patterns you're weakest at.
2. Day 2, solve and narrate. Solve two problems from your list out loud, timing yourself to 25 minutes each. Our guide to thinking out loud in coding interviews has the phrases to use.
3. Day 3, mock. Run a 3-question Mock Interview with the coding mix and your language. Write down the two lowest scores.
4. Day 4, fix. Re-answer those two questions in your own words. Then ask a chatbot for three follow-up questions on each and answer them aloud.
5. Day 5, full round. Run a 5-question mock that mixes coding and behavioral questions, the way a real loop does. Compare the report card with Day 3.

Prefer nothing to install? The browser AI mock interview has 113 real questions across 9 tracks, including coding, system design and SQL. If you also use a tool in a live round, follow the rules of the employer or platform you're interviewing with — many people use it only to practice, which works on the free plan. Never use one during an online assessment or coding test: take it yourself and practice beforehand.

Which AI interview assistant should you pick for coding?

• You want daily spoken reps built from your own job description: CoPilot Interview's free plan, then Standard if you need longer sessions. It is our AI interview assistant for Windows and Mac.
• You want a free FAANG-style round with no install: interviewing.io's AI Interviewer.
• Your loop includes an AI-enabled coding round: Hello Interview's AI-Enabled Coding track, plus our Meta guide.
• You also need courses and peer mocks: Aced.
• You want help in many languages across devices: LockedIn AI.
• You're on a zero budget: a free chatbot set to "hints only", plus the free CoPilot Interview plan for spoken practice.

Coding is rarely the whole loop. If yours includes design rounds, read our picks for the best AI interview assistant for system design; data roles should see the data science version.

FAQ

What is the best AI interview assistant for coding interviews?

Our pick is CoPilot Interview, and we make it, so weigh that. Its Mock Interview reads coding questions aloud in your chosen language, never auto-submits, and scores each answer out of 10 with what to fix and a model answer; its coding mode returns complete code, complexity and an example run. The free plan gives you 15 minutes a day. For a free FAANG-style AI round, try interviewing.io's AI Interviewer; for AI-enabled coding rounds, Hello Interview's Guided Practice.

Can an AI tool give hints instead of full solutions?

Some can, if you set it up that way. General chatbots such as ChatGPT and Claude follow whatever you ask for, so a prompt like "give me one hint at a time" works. Most interview-specific tools are built to return a full approach or full code. In CoPilot Interview, the hint-free route is Mock Interview: you answer first, then see the score and a model answer.

Is there a free AI tool for coding interview practice?

Yes. As of October 2026, CoPilot Interview gives you 15 free minutes every day across all four modes, interviewing.io's AI Interviewer for coding and system design is free, Hello Interview offers one free problem per Guided Practice track, and ChatGPT and Claude have free plans. CoPilot Interview also has a browser mock interview with coding questions and nothing to install.

Which programming languages do AI coding interview tools support?

It varies. LockedIn AI lists 12 languages on its coding page, Final Round AI names Python, JavaScript, Java and C++ "and more", and CoPilot Interview works in the coding language you choose. interviewing.io, Hello Interview and Aced don't list languages for their AI features, so check your language in a free session before you pay.

Should I practice coding interviews with AI or with a person?

Both, in that order. Use an AI tool for daily reps, because it is cheap, available any time and scores you the same way every session. Book one or two human mock interviews in the final week or two, when you want a senior engineer's judgment of whether you would pass. interviewing.io's human mocks start at $179 a session as of October 2026.

Can I use AI during a live coding interview?

Only if the employer allows it. Follow the rules of the employer or platform you're interviewing with — many people use it only to practice, which works on the free plan. Never use one during an online assessment or a coding test; take it yourself and use the tool to practice beforehand.