AI Mock Interview Services in Korea, Compared — Free Practice Platforms vs Paid Deep Feedback (2026)

There are four broad groups. ① Free or low-cost practice from hiring platforms — Saramin's AI mock interview and JOBDA; ② video-analysis specialists — ViewInter, by Genesis Lab; ③ paid deep-feedback services — preterview; ④ college-admissions-only tools — Interview King (면접왕) and ViewInter Saenggibu. For job hunting, you'll choose from the first three.

The split exists for a reason. Hiring platforms make money by attracting members and matching them to employers, so they give practice away free and at scale. Independent services sell the practice itself, so they compete on feedback depth. That makes the two camps complements rather than substitutes: one fills your practice volume for free, the other sells depth.

One common mix-up worth correcting: Interview King (interviewking.kr) is an AI mock interview service for Korean college admissions. It builds questions from your school records and shows admission benchmarks by department — if you're preparing for a job interview, drop it from the list.

Saramin is closer to 'fixing how you look on camera'; JOBDA is closer to 'rehearsing the actual AI competency test (yeokgeom)'. Both are free to start, but they train different things.

Saramin's AI mock interview has two steps: a practice interview (5 questions, with AI guidance, real-time behavior coaching, and per-answer feedback, plus one report) and a full interview (11 questions including follow-ups, with three reports — overall, detailed feedback, and a pass guide). You can replay your answer videos and get corrections with sample answers, on PC or mobile. The trial is free, but paid products exist — their prices aren't on the public page (you see them after logging in), and purchases are valid for 30 days.

JOBDA (run by Jainwon) gives you five free real attempts at its competency test per month, resetting on the 1st. The test combines strategy games, a disposition assessment, and a video interview, and JOBDA says it's used by more than 750 companies. It also offers company-specific past-question interview practice and a hands-on developer assessment. Because test results feed into its job-matching platform, it's effectively mandatory practice if a yeokgeom-style screening is on your calendar.

preterview is a conversational deep-practice tool: one interview runs up to 24 question-and-answer turns and includes up to three full report generations. It works on the content and structure of your answers and how you handle follow-ups — not your on-camera expression. On the English pricing page, a Single Pass is $6.99, a 5-Pack is $19.99 ($4.00 per interview), and Season 20 is $49.99 ($2.50 per interview), all valid for 90 days. Signing up gets you one free mock interview with all features.

Outside the interview itself, the free tier is fairly wide: resume polishing and resume import are free, and your first portfolio review is free for life. Refunds are full within 7 days for unused passes; if you've used some, those are deducted at the single-pass price and the rest is refunded. It's a pass system, not a subscription — nothing auto-renews.

The weaknesses are just as concrete. The free interview is one per signup — you can't practice repeatedly for free the way you can on Saramin or JOBDA. It isn't a hiring platform, so practice doesn't connect to applications or matching, and its user base and review volume are smaller than the big platforms'. The realistic combination: build volume on the free platforms, and add the paid tool at the point where you need deep feedback on what you're actually saying.

ViewInter fits people facing an AI video-interview screening. It's a video-based AI interview practice and analysis service by Genesis Lab, whose enterprise product ViewInterHR has reportedly been used by around 150 companies including LG Electronics and Hyundai Department Store Group. Practicing on the same family of technology that may evaluate you is the draw.

That said, as of July 2026, ViewInter's consumer pricing is not published on its public pages. You'd need to check the app or contact them for the free tier and paid options — and this guide doesn't print prices it couldn't verify.

Interview King serves students preparing for Korean university admissions interviews. It generates expected questions from your registered school records, provides department-level expected questions and admission benchmarks, and gives feedback on logic and expression, with a free trial followed by paid passes (prices not listed). Genesis Lab also runs ViewInter Saenggibu for the same audience — for admissions interviews, those are the two tracks to look at.

On price: JOBDA is free (five real competency-test attempts per month, resetting on the 1st). Saramin has a free trial, with paid products priced behind login and valid for 30 days. ViewInter's consumer pricing is not published. preterview gives one free interview at signup, then $6.99 (single) to $49.99 (20 interviews) on the English page — ₩9,900 to ₩79,000 on the Korean page — valid for 90 days. Interview King has a free trial then paid passes (prices unlisted, admissions-only).

On format, there are two families. Video-analysis tools (Saramin, ViewInter, and the video-interview portion of JOBDA's test) correct what the camera sees: eye contact, expression, delivery. Q&A tools (preterview, with its 24-turn exchange) work on what you say: answer content, structure, follow-up handling. They train different muscles, and one doesn't substitute for the other.

On target: for conglomerate-style yeokgeom/AI screenings, JOBDA (you practice on the real test); for fixing on-camera form, Saramin or ViewInter; for content practice ahead of a human-led job or technical interview, a Q&A tool like preterview; for college admissions, Interview King or ViewInter Saenggibu.

Pick by what your next interview actually is. If an AI video screening is on your calendar, tools that mirror that exact format — JOBDA, Saramin, ViewInter — come first. If what's left is a job or technical interview with a human interviewer, a Q&A tool that digs into your answer content comes first. When the practice format doesn't match the interview format, the hours don't transfer well.

Start free — that's the standard order. JOBDA's five monthly attempts, Saramin's trial, and preterview's one free interview together are enough to diagnose where you stand. Running the free tiers shows you whether the problem is how you look on camera or how thin your answers are, and then you spend money only on the weak axis.

Two closing cautions. Prices and free tiers change often, so re-check the official page before paying. And on every one of these services, the AI score is a practice reference, not a pass prediction — aim for smoother answers, not a higher number.