Saturday, November 7, 2026 · Customer reviews of US businesses
The Fair Hearing score
Excellent
14 reviews
QuantVaultSelect a line to read only those reviews.
Honesty, pricing, process and quality scores appear once 5 customers have rated them.
QuantVault is an interview prep platform for quantitative finance roles: quant researcher, quant trader, and quant developer positions at trading firms and hedge funds.The core of the site is a bank of 3,200+ real, candidate-reported interview problems with fully worked solutions, covering probability, statistics, brainteasers, regression and machine learning, market making, and coding. Around 400 problems are completely free, no card required.Beyond the problem bank, QuantVault includes firm-by-firm interview funnels for 40 companies (what each round actually looks like, stage by stage), timed replicas of real online assessments, market-making and trading games of the kind used in live interviews, 40+ interactive lessons, and an adaptive study plan that calibrates to your level and targets your weakest topics.The site is built and maintained by working quant researchers. Every problem traces back to a real interview report, and solutions are written and checked by hand. Feedback from users routinely ships as fixes and features within days.Plans are simple: a large free tier, plus monthly, quarterly, and annual Pro subscriptions with everything unlocked. Students and career-switchers use QuantVault to prepare for internships and full-time roles at firms like Optiver, IMC, DRW, Citadel, Jane Street, SIG, and Two Sigma.
QuantVault (quantvault.org) has 14 customer reviews on The Fair Hearing, with an average rating of 4.9 out of 5.
14 approved reviews, newest moderated first
Very complete resources and reasonable price. Problems are legit actual problems that appear in oa and interviews. The the creater of quantvault read every single email and actually reply helpful information/improve the website accordingly to feedback. Site is adaptive, reflect my skill trees and levels - feels like playing game which makes everything even more addictive than before, highly recommend.
By Saints& S.
I really appreciate the work Stanley has done for QuantVault. The problem bank is great and they also truly reflect what needs to be prepared if one wants to break into the quant industry. I highly recommend t
By Justin L.
I had such a great experience using QuantVault during my quant interview preparation! What I liked most was how well it combines learning with practice. I could review concepts, immediately apply them to problems, and gradually build much stronger intuition instead of just memorizing interview tricks. I also really appreciated being able to connect directly with Stanley, the founder. That personal connection made the whole experience feel much more supportive, and it’s obvious that he genuinely cares about the users and the quality of the platform. I recently received a quant research internship offer, which I’m incredibly excited about, and QuantVault was definitely an important part of my preparation. I’m very grateful for the resource and for all the work that has gone into building it. Highly recommend QuantVault to anyone preparing for quant interviews or trying to strengthen their quantitative skills through both learning and lots of practice!
By Qiuran L.
Response from QuantVault· Oct 21, 2026
Thank you, Qiuran, and congratulations on the quant research internship offer! Building intuition instead of memorising tricks, with the learning and the practice in one place, is exactly what we set out to do, and hearing that it helped you get there means a lot. Stanley, QuantVault
By far the best resource I’ve found for quant interview preparation. The material is extremely useful, well organized, and genuinely helps you prepare effectively. I only wish I had discovered QuantVault earlier.
By AndP
Response from QuantVault· Oct 3, 2026
Thank you, AndP. We put a lot of work into how the material is organized, so it's great to hear it makes your prep more effective. As for wishing you'd found it earlier, that's the nicest kind of complaint to get. Stanley
QuantVault has a large collection of problems, and I’ve found many of the solutions quite helpful and well explained. Stanley is also very responsive when questions or issues come up. Overall, I’ve had a very nice experience using the platform.
By li C.
Response from QuantVault· Sep 28, 2026
Thanks, Li. The solution errors you flagged were real catches, and fixing them made the problem bank better for everyone who uses it. Really glad the explanations have been useful to you. Stanley
A brilliant, comprehensive list of firms, complete with some very useful online assessment simulations. There's a great selection of lessons to work through covering the most crucial quantitative skills you need. The question bank is more than generous, and almost all of the questions are tagged with the specific firms that have used them in the past. The progress bar is a really nice touch too—it gives you a genuine sense of how ready you are, tailored to the exact firms and roles you're targeting.
By fpt
QuantVault has been extremely helpful for my quant interview preparation. The firm-specific question sets are very useful, and the market-making games in particular gave me a much better way to practice the actual decision-making and mental math that comes up in interviews rather than just reading solutions. I also really like how the prep is organized around specific firms and interview stages. It makes it much easier to focus on the types of questions and skills that are actually relevant for the interview you have coming up. I would highly recommend QuantVault to anyone preparing for quantitative trading/QR interviews. It has been one of the most useful resources I’ve found for both technical question practice and more interactive market-making preparation.
By Jeevaa S.
good questions, correct process
By Xiangyu W.
Response from QuantVault· Sep 13, 2026
Thanks Xiangyu. "Correct process" is the part we work hardest on, most of the firm pages are rebuilt from candidate reports every few weeks. Good luck with the rounds ahead.
