OpenQuant's free question bank and study guide are genuinely good - but roughly 185 math questions and zero coding content only carry you so far. MyntBit adds 1,000+ questions, C++/Python coding challenges, three career tracks, and firm-specific study plans.
The problem
OpenQuant wasn't built for quant interviews - and it shows in three big ways.
OpenQuant's bank is free and well-curated, but it's small - roughly 185 questions as of mid-2026, concentrated in probability and brainteasers. Most candidates exhaust it weeks before interview day and need somewhere else to keep drilling.
OpenQuant runs a quant developer job board, yet ships no developer prep at all - no C++, no Python, no data structures, no code runner. The coding rounds that quant firms actually run are entirely on you.
The free study guide is genuinely useful, but it's one generic path. There are no role-based career tracks and no firm-specific study plans to focus the final weeks of prep on the firm you're actually interviewing with.
The Myntbit approach
Purpose-built for quant interviews from day one. Here's how we close the gap.
Question Depth
OpenQuant's ~185 questions are a good warm-up; MyntBit's 1,000+ curated questions are a full training program. Probability and brainteasers are covered just as deeply - then statistics, finance, ML, and coding go far beyond.
Question library
1,040problems
Coding Challenges
OpenQuant lists thousands of quant developer jobs but offers nothing to prepare for them. MyntBit is the only platform in the niche with a C++ developer track - and every coding question runs against test cases in the browser.
1 def rolling_vol(returns, n):
2 return (returns
3 .rolling(n)
4 .std()
5 .mul(np.sqrt(252)))Career Tracks
Stop guessing what to study. MyntBit's career tracks match the actual roles at quant firms - developer, researcher, or trader - with a curated curriculum for each instead of one generic guide.
Choose your track
Developer
C++ / Python
Researcher
Stats / ML
Trader
MCQs / Mental math
Firm Study Plans
OpenQuant has a handful of firm internship posts; MyntBit ships firm-specific study plans for 13 firms that sequence your prep week by week - Jane Street, Citadel, Two Sigma, SIG, and more.
Citadel QR plan
25% · Week 2 of 8
Why teams switch
OpenQuant's free bank is great until you finish it. MyntBit gives you over five times the volume across probability, stats, finance, ML, and coding.
OpenQuant has zero coding content. MyntBit adds real C++ and Python challenges with a built-in code runner - essential for developer and researcher rounds.
Quant Developer (C++), Quant Researcher (Python/stats), and Quant Trader (MCQs) - pick your target role and follow a curated path for it.
Structured plans for 13 firms including Jane Street, Citadel, Two Sigma, and SIG - far beyond OpenQuant's handful of internship blog posts.
Ranked challenges on fresh problems every week. OpenQuant has no competition layer - MyntBit keeps practice sharp with leaderboards.
Speed math, market making, risk, and probability games - free to play, no credit card. Game-day pressure training OpenQuant's single math arcade doesn't match.
Side by side
The full breakdown of what each platform offers for quant interview prep.
| Feature | MyntBit | OpenQuant |
|---|---|---|
| Question Bank | ||
| 1,000+ practice questions | - | |
| Probability & brainteaser questions | ||
| Coding challenges (C++ & Python) | - | |
| Built-in code runner | - | |
| Entire bank free | Partial | |
| Learning Structure | ||
| Career tracks (dev / researcher / trader) | - | |
| Firm-specific study plans | - | |
| Free study guide / curriculum | ||
| Firm interview guides | Partial | |
| ML & data science coverage | Partial | |
| Practice Experience | ||
| Mental math game | ||
| Simulated online assessments | Partial | |
| Trading simulation games | - | |
| Solution explanations | ||
| Weekly competitions | - | |
| Community & Extras | ||
| Free tier, no credit card | ||
| Quant jobs board | Partial | |
| Video solutions (YouTube) | - | |
| Salary & compensation content | ||
| Firm study plans for 13 firms | - | |
The bottom line
OpenQuant deserves real credit: a free question bank, a strong free study guide, and the best-known quant job board. Use them. But when you need volume, coding practice, and a structured path for a specific role or firm, MyntBit picks up where OpenQuant's ~185 questions stop - 1,000+ questions, a C++ developer track, study plans for 13 firms, and a free tier with no credit card.
Common questions
Yes - OpenQuant is free, so it's worth using. Its roughly 185 questions are well-curated and its free study guide is one of the better free quant resources available. The catch is scope: there's no coding content, no career tracks, no firm-specific study plans, and a bank most candidates finish quickly. MyntBit fills those gaps with 1,000+ questions, C++/Python challenges, and study plans for 13 firms - also free to start.
MyntBit is better for quant developer interviews. OpenQuant runs a strong quant developer job board but has zero developer prep - no C++, no data structures, no coding problems. MyntBit's Quant Developer track covers C++ and low-latency topics with coding challenges you run against test cases in a built-in code runner.
Around 185 free questions as of mid-2026, concentrated in probability and brainteasers with smaller sets in statistics, discrete math, finance, and ML. MyntBit has 1,000+ curated questions across the same math topics plus coding challenges for developer and researcher roles.
No. OpenQuant's bank is entirely math-based - probability, brainteasers, statistics, discrete math, finance, and a few ML questions - with no coding problems and no code runner. MyntBit includes interactive C++ and Python coding challenges with test-case validation.
Yes - they complement each other well. OpenQuant's free study guide, video solutions, and job board are worth bookmarking regardless of where you practice. Pair them with MyntBit's larger question bank, coding challenges, career tracks, and firm-specific study plans for the actual drilling.
Ready to switch
Free tier, no credit card. Join thousands of candidates preparing for roles at Citadel, Jane Street, Two Sigma, and more.