Best Mock Interview Platforms for Coding Practice

A free trial can mean a full mock interview, a few AI credits, or access to features that don’t include coding. Here are 11 options, with a close look at what each offers on trial and who each may suit.

Table of Contents

• Phantom Code AI
• Interview Sidekick: free-plan access for technical and behavioral practice
• Huru: free mock interviews with AI feedback reports
• Final Round AI: a free plan for job-search preparation
• Four-Leaf: short pass or monthly plan for a focused interview
• LockedIn AI: a free basic plan with optional premium features
• Interviews Chat: 30 free trial credits without a card
• Thita AI: a free tier for coding and system design preparation
• Pramp: peer-based mock interviews to practice live problem solving
• interviewing.io: interviewer-led technical mock interviews
• FreeMockInterview: check its current free coding-practice options
• Free-Trial Comparison: Access, Feedback, and Best Fit
• FAQ
• Conclusion

1. Phantom Code AI

Phantom Code AI is a desktop assistant for coding interviews. It listens, transcribes, recognizes problem types, and gives real-time guidance. It’s best suited to software engineers preparing for DSA, system design, or behavioral rounds who want help during a live practice session.

That live guidance sets it apart from tools that only offer general AI coaching. It also sells AI mock interview packs, starting with a single 30-minute session, with credits that never expire. Try it during a mock round with a prompt such as merging overlapping intervals: explain your approach, check edge cases, then compare the guidance with your own reasoning. Every new account gets free credits at signup, with no card required. Check the current terms before you start.

Keep interview rules in mind. Use assistance only in practice or when the interviewer and employer permit it. For details on the available trial, see Phantom Code AI’s AI interview bot.

2. Interview Sidekick: free-plan access for technical and behavioral practice

Interview Sidekick has a free plan for trying core features. It’s aimed at people preparing for technical and behavioral interviews at top tech companies, so it may suit engineers who want to rehearse how they explain a solution as well as how they write it.

Before relying on it for a DSA session, check whether the free plan supports writing and running code, or whether it focuses on spoken interview practice. That distinction matters when you need to test a solution under time pressure.

3. Huru: free mock interviews with AI feedback reports

Huru is free for job seekers, with unlimited mock interviews, full AI feedback reports, a Chrome extension, and a library of 50,000+ questions. It’s best for behavioral interview practice using the STAR method.

That makes it useful for reviewing how you describe a project or explain a tough bug. You can use the question library to rehearse a response, then use the report to spot what to improve. Check for a coding editor or live coding environment before assuming it replaces hands-on DSA practice.

If your next interview is mostly behavioral, the feedback reports give you a clear way to judge your answers. For code writing, confirm the available tools first.

4. Final Round AI: a free plan for job-search preparation

Final Round AI has a free plan for setting up job goals and preparation materials; live CoPilot sessions and practice interviews need the Pro plan, from $25 per month. It’s positioned for job seekers who want help across resume work, applications, and interview preparation, rather than coding practice alone.

It offers AI assistance and lets you select an interview type. Treat the free plan as a chance to check the setup, then verify coding support before building your prep plan around it.

Don’t compare it with a fixed monthly price unless you’ve confirmed the current terms.

5. Four-Leaf: short pass or monthly plan for a focused interview

Four-Leaf has a three-day free trial with all features included on every plan. It’s aimed at job seekers who want one tool for interview prep along with resumes, cover letters, job search, and negotiation.

Its listed paid options include a one-time $5 five-day pass for one upcoming interview, or a $20 monthly Pro plan for an ongoing search. Those terms make the trial easier to judge against a real deadline: use it to see whether the interview help fits your next round, then decide if a short pass or ongoing access makes sense.

It offers AI assistance and real-time feedback. Engineers should test for a coding editor and code review during the trial instead of assuming the broader job-search tools include them.

6. LockedIn AI: a free basic plan with optional premium features

LockedIn AI has a free basic plan, with premium plans for advanced features and Duo remote assistance. It’s best suited to fast coding interviews where a user may want optional remote mentor help.

The free access is a basic plan rather than a time-limited trial. Check the plan details before you depend on it for a practice session.

For a coding round, test the exact workflow you need: can you work through a problem and get useful support at the right point? Phantom Code AI is another option when your main need is real-time guidance from a desktop assistant.

7. Interviews Chat: 30 free trial credits without a card

Interviews Chat includes 30 free trial credits and doesn’t require a card to start. It’s a fit for budget-conscious users who want real-time interview assistance before paying for ongoing access.

The credit count gives you a clear limit to check. Ask how many credits one session uses and which interview formats they cover. Find that out before you spend them. If you’re preparing for algorithms, confirm that a credit can be used for coding practice rather than only spoken responses.

The trial makes it possible to test the service without entering payment details. After the trial, paid plans start at $19 per month, and one credit equals one minute of Copilot or one Copilot suggestion.

8. Thita AI: a free tier for coding and system design preparation

Thita AI has a free tier for getting started with AI coaching. It’s specifically aimed at coding and system design interview preparation, so it’s a closer match for engineers who need technical practice than general job-search tools.

Use the free access to check whether the coaching can help with your current target, such as explaining a system-design tradeoff or talking through a DSA solution.

Before choosing it as your main platform, confirm how it handles code entry and feedback. The free tier is a useful starting point, so check its limits before you rely on it.

9. Pramp: peer-based mock interviews to practice live problem solving

Pramp is a peer-based format for live technical interview practice. It’s suited to engineers who want to solve a problem with another person rather than practice only with an AI interviewer.

In this format, both people take turns as interviewer and interviewee. The sessions use video and a collaborative code editor, and each person gives feedback after the interview. That gives you a chance to practise explaining why you chose a data structure, then listen for places where your partner got stuck.

It offers free peer practice; check current access and session terms before booking. Peer feedback can be helpful, though its depth depends on the person you’re paired with.

10. interviewing.io: interviewer-led technical mock interviews

interviewing.io pairs engineers with experienced interviewers for paid mock interviews, and it also offers a free AI interviewer for coding and system design practice.

Before signing up, confirm whether you can practise a live coding round, what kind of interviewer leads it, and whether feedback covers both your code and how you explain your choices.

If a human interviewer is your priority, compare the session format and current terms directly with other live-practice options. For a free or low-cost plan, verify the price before booking.

11. FreeMockInterview: check its current free coding-practice options

FreeMockInterview has interview-preparation material. It’s worth checking after you verify that it supports the type of practice you need.

For an engineer, a useful test is specific: can you enter a solution, run it, and talk through edge cases as you would in an interview?

Confirm the current free features before setting aside time for a coding round there.

Free-Trial Comparison: Access, Feedback, and Best Fit

The best free option depends on what you need to practise. A permanently available free plan differs from a short trial, and credits aren’t the same as days of access. Use this comparison to narrow the field, then confirm the current terms before you sign up.

For a coding round, prioritize a tool that lets you solve a problem and explain your choices. For behavioral work, look for a clear feedback report. If you want a human exchange, peer practice gives you a different kind of pressure than solo AI coaching.

FAQ

Which mock interview platform has a free trial for coding practice?

Thita AI has a free tier for coding and system design coaching, while Interviews Chat lists 30 free trial credits. Confirm that the access you choose includes coding practice, not only general interview coaching.

Are free plans and free trials the same thing?

No. A free plan can remain available without a stated end date, while a free trial may last for a set period or include a fixed number of credits. For coding practice, check what the free access lets you do. A plan that only supports general interview questions may not include a code editor or code feedback.

Can I practise coding interviews with a person for free?

Pramp offers free peer practice with a collaborative code editor and feedback between partners. Check current availability and session rules before booking. Peer sessions let you practise talking through a solution with another person, but feedback quality can vary with your partner’s experience.

What should I check before starting a coding interview trial?

Check whether you can enter and run code, choose a language, practise the interview format you expect, and review feedback afterward. Also confirm the trial’s length or credit limit and the price after it ends. Those details help you avoid spending time on a tool that doesn’t support your next interview round.

Conclusion

For engineers who want real-time guidance while practising, start with Phantom Code AI’s free signup credits, which need no card. Then run one timed problem and decide whether the support fits your interview rules and prep needs.