Verdict: not rivals, sequential. LeetCode is where you learn to solve problems: 4,041 of them as of this writing, 3,260 free, the deepest bank there is. DevInterview.AI is where you learn to solve them while a live voice interviewer watches, questions, and grades you. Typing silently into a judge and performing under questioning are different skills, and the interview only tests the second one.
Disclosure: we build DevInterview.AI, and this is our site. Every price below was checked against vendor pages on September 1, 2026, with sources linked at the bottom.
Quick comparison
| DevInterview.AI | LeetCode | |
|---|---|---|
| What a session is | 30-minute live voice interview with follow-up questions | You, an editor, and a test judge |
| Anyone evaluating you | Scored evaluation across four dimensions plus a hire verdict | Pass/fail tests, runtime and memory stats |
| Price | $24.99/mo, $59.99/qtr, $119.99/yr | Premium $35/mo or $159/yr |
| Free tier | First interview free; 19 courses, 2,000+ questions with AI feedback | 3,260 of 4,041 problems free |
| Company data | 600+ company profiles, company-style interviews | Company tags and frequency data, Premium only |
| Mock interviews | Unlimited, voice, coding, system design, and behavioral | Timed typed assessments for 8 companies, Premium |
| System design and behavioral | Yes, both, live | No |
What LeetCode actually is
The industry's default problem bank. A free account gets you 3,260 problems with an online judge; Premium at $35 a month or $159 a year unlocks the remaining 781, company tags and frequency data, and timed mock assessments for eight named companies. It is the right tool for the drilling phase, and nothing here argues otherwise.
What it is not, anywhere on the product, is an interview. There is no voice, no interviewer, no follow-up questions, and no feedback on anything except whether tests pass and how fast. Nobody asks why you chose that structure, what breaks on an empty input, or to talk through complexity, which is most of what a real interviewer spends the hour probing.
Where LeetCode wins
Problem volume, and it is not close. 4,041 problems, contests, streaks, a mobile app, solutions in every language you would want. If your gap is raw problem-solving ability, LeetCode is where that gets built, and most of it costs nothing. The interview-crux data that Premium sells, which companies actually ask what and how often, is also unique at that scale.
Where DevInterview.AI wins
Everything that happens out loud. The pattern we hear constantly, and the reason this page exists: hundreds of solved problems, then freezing in the real interview, because solo drilling never trained speaking, being interrupted, or defending choices under time pressure. Our sessions run in a real editor with execution in five languages, with an interviewer that asks the questions a human would, and end with a scored evaluation and hire verdict. System design and behavioral interviews, which LeetCode does not attempt, are in the same subscription. And our free practice layer, 2,000+ questions with AI feedback on your actual code, covers a decent slice of what Premium charges for.
The honest budget answer
If you can pay for one: pay for whichever phase you are in. Still building fundamentals, LeetCode free tier plus our free courses costs nothing. Four to eight weeks from interviews, $24.99 here buys the rehearsal that drilling cannot, while LeetCode's free 3,260 problems stay open for drills.
FAQ
Is LeetCode Premium worth it in 2026?
For company tags and locked problems during a targeted drill phase, many people think so at $159 a year. It will not, by design, give you a single minute of spoken interview practice.
Can LeetCode prepare me for system design interviews?
No. LeetCode has no system design product. Its scope is algorithmic problems typed into a judge.
How many LeetCode problems are free?
3,260 of 4,041 as of September 2026, by their own problem data. The locked 781, plus company tags and timed assessments, require Premium.
Do I need both?
Most successful candidates effectively use both layers: a problem bank for volume drilling and live interviews for delivery. Whether the bank layer needs to be paid is the only real question, and for many people the free 3,260 is plenty.