AI Mock Interview Platforms for Software Engineers, Compared Round by Round

The best AI mock interview platforms for software engineers are the ones that run your round properly. Devana and DevInterview.AI run spoken interviews with an editor that executes your code, and cover system design. Hello Interview adds live system design practice, and interviewing.io's AI Interviewer is free for coding and system design.

For questions built from your own resume, Devana does it on its free plan and Final Round AI on its paid one. Transparency note: we build Devana, and every fact about the others below was read on their own sites on October 18, 2026.

Eight AI interviewers, round by round

To compare AI mock interview tools for interview preparation, check five things: whether you speak or type, whether your code actually runs, whether the interviewer can follow a system design diagram, whether it asks about your own resume, and what the feedback scores. The table answers those for eight tools, from each vendor's own pages.

"Not stated" means the public pages do not say, not that the feature is missing.

Coding rounds: does the interviewer run your code?

A coding round is judged on working code and on how you explained it, so an interviewer that cannot run your code is guessing at half the grade. Two of the eight say plainly that your code runs. Devana executes it in Python, JavaScript, TypeScript, Java or C++, and DevInterview.AI's pricing page describes "a live coding editor with execution" and an interviewer that follows it as you work.

In a Devana coding round, Josh asks for your approach before you type, is sent your code as you write it and the test results each time you run them, and asks you to defend the solution before he discusses it. The round is scored 60% on communication (six metrics, from approach planning to how you handle silence) and 40% on correctness, structure and edge cases. You can also paste any problem into Bring Your Own Problem and be interviewed on it. More on the format in AI mock interviews for coding.

The others are vaguer in public. interviewing.io's AI Interviewer runs coding interviews "in the style of a FAANG mock interview" with over 200 problems from Beyond Cracking the Coding Interview, free, but does not say whether you speak or type. HackerRank's 60-minute coding format gives feedback on your approach, code and communication. Final Round AI has a coding scenario you answer out loud, with "screen help" for the problem in front of you, and Hello Interview's AI coding lives in its step-by-step guided practice rather than a timed live round.

System design: can it follow your diagram?

System design is where AI interviewers differ most, because the interviewer has to understand a drawing and keep a 45 to 60 minute conversation on track.

• Devana gives you a whiteboard of boxes, arrows and text, and the interviewer is told in words what is on it: the components you named and how they connect. Rounds run up to 60 minutes on a paid plan and 20 on Free, and are scored on eight metrics, 40% communication and 60% the design. See how to practice system design with AI.
• Hello Interview sells live practice with an AI interviewer: a full system design interview out loud, ending in a hire or no-hire decision for your target level and a written report. Premium includes 1 such interview with a month of access, 2 with a year and 4 with lifetime, next to its guided practice on 45 system design and low-level design questions.
• DevInterview.AI uses a canvas the interviewer follows, in sessions its pricing page puts at 30 to 45 minutes.
• interviewing.io's free AI Interviewer covers system design, and HackerRank has a 60-minute design format. Aced lists system design among its AI practice questions, and Final Round AI among its practice scenarios.

Behavioral rounds

Behavioral answers fail in predictable ways: no clear situation, "we" instead of "I", no result. A useful AI interviewer asks the follow-up that exposes it. Devana's behavioral round probes what you personally did and scores 40% on delivery and 60% on the STAR content, with sessions of up to 30 minutes on a paid plan. HackerRank's behavioral format is 30 minutes on storytelling and the STAR method. Aced's AI grades the transcript of a peer behavioral session against a rubric, for paying members, and Hello Interview's guided practice asks follow-up questions about your stories.

Two general tools are worth knowing here even though neither runs a coding or design round. Huru is free for everyone and scores spoken answers on relevance, structure, specificity, impact and articulation, for more than 240 roles. Yoodli runs delivery-focused roleplays, free for up to 5 in total. Live copilots that help during the real interview are a different category; Final Round AI alternatives explains the difference.

Questions built from your resume

Interviewers prepare from your resume, and the hardest questions are about your own claims. Only two of the eight say they build questions from it.

Devana reads a PDF, DOCX or TXT resume of up to 5 MB and runs the round you choose from it. A behavioral round asks three questions, each naming a real role or project from your resume and aimed at a different competency, with follow-ups. A coding round gives you two problems framed in the domain of your work, and their test cases are checked against a reference solution before the interview starts. A system design round picks the problem closest to systems you have built. The file is read in memory and never stored, and it works on the Free plan. Mock interviews based on your resume shows each step.

Final Round AI's Practice Interview runs in its desktop app against a "Goal": the role, company, job description, resume and materials you attach, so its questions can refer to all of them. Practice sessions need a paid plan. Huru builds interviews from a role or a job description you paste, and tailors your resume separately. DevInterview.AI's pricing page mentions a resume only for its paid one-on-one call with a senior engineer.

Voice or text, and why it matters

Devana, DevInterview.AI, Hello Interview's live practice and Final Round AI's practice are spoken. For interviewing.io, HackerRank, Aced and Skillora, the public pages do not say. It matters because a real round is spoken: explaining while you think is the skill most candidates have never practiced, and typing to a chatbot skips it.

What a month of practice costs

Of the paid plans that say they are unlimited, DevInterview.AI's yearly one is the cheapest here. Devana's yearly Pro works out at $29 a month for up to 40 interviews a month, and its Free plan includes resume-based rounds. Hello Interview's price buys mainly study material, with a few live interviews included, and Final Round AI's buys mainly its live copilot, with practice included.

Which one should you pick?

• A coding loop soon, and you go quiet when you code: a spoken interviewer that runs your code, Devana or DevInterview.AI. Both can be tried free.
• No budget at all: interviewing.io's AI Interviewer for coding and system design, plus Devana's 3 free interviews a month, which include resume-based rounds.
• A senior system design round: Hello Interview to learn the material and for a few live rounds with a hire or no-hire call, then frequent spoken reps elsewhere.
• Interviewers keep asking about your resume: a resume-based round on Devana, free; or Final Round AI if you already pay for its copilot.
• A HackerRank assessment on the way: its own AI mock interviews let you practice on the same platform.

What an AI interviewer cannot do

It cannot tell you how one company's hiring committee would weigh your answer, and talking to it does not feel like facing a panel you want to impress. Use AI for the volume of practice, then book one or two sessions with a working engineer close to your onsite. Our roundup of mock interview tools of every kind, including peer mocks and paid human sessions, covers those options and what they cost.

Frequently asked questions