✦ Founding rates end Sep 1 — subscribe before then and you keep your rate for as long as you stay subscribed.
Everything you need to walk into a quant interview ready — 3,200+ problems with full solutions, the adaptive study plan, and 40 company funnels. ~400 problems free.
Looking for free access? Refer a friend — earn a free month. Each.Credited half when they join, half when they renew.
Your friend gets 20% off, you get a month of Pro credited per friend who joins — up to a whole year free. Grab your personal link on your profile and share it anywhere.
Every problem traces to a candidate-reported question — interview debriefs, people we've coached, and each firm's real process.
AI cleans, never invents
AI only tidies the wording, standardizes notation, and lays out the solution steps — it never makes up the problem.
Authored & verified by us
Each solution is written by hand and independently checked for correctness before it ships. Find a genuine error and you get a free month of Pro.
What quants say
Pulled straight from the inbox.
Real quotes from member emails, published with permission.
Re: You've solved 39 on QuantVault, and Pro is liveJun 19, 2026
Most of my friends who have been preparing for quant interviews over the past few months have used QuantVault extensively and have spoken very highly of it.
Q
Quentin
Quant at a bank
Re: your first day on ProJun 27, 2026
Thank you so much for making such a wonderful website! It's been far the most helpful one I used to prepare for quant interviews.
S
QR / QD internship candidate
Name withheld on request
Re: Pro AccessJun 25, 2026
One of the things that I found very helpful was the structure of the solutions – having an intuitive sense, testing small cases, estimating a solution, outlining a solution, and then having a formal solution.
B
Pro member
ML trading background · name withheld on request
Re: Technical ProblemsJul 27, 2026
It is the best platform I have used so far.
Z
Pro member
Prepping 2027 quant internships · name withheld on request
Re: welcome to QuantVault, a note from StanleyAug 3, 2026
This site is by far the best one I have ever seen in the quant prep space.
A
Pro member
Name withheld on request
Questions
Can I cancel anytime?
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Yes. Cancel anytime from your account settings. You'll keep Pro access until the end of your billing period.
Are the problems AI-generated?
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No. Every problem traces back to a real, candidate-reported interview — debriefs from people who sat the actual rounds, plus firm processes we know first-hand. We do use AI, and we are open about where: it tidies wording, standardizes notation, and formats solutions consistently. It never invents problems. You can check the receipts yourself: most problems show the firm and date of their latest candidate report, user-reported corrections ship within days, and our OA replicas match real assessments down to their original graphics. And we put money on it: find a genuine error in a problem or solution, email [email protected], and if you are right you get a free month of Pro.
What payment methods do you accept?
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We accept all major credit and debit cards through Stripe. Your payment information is handled securely by Stripe and never stored on our servers.
Which problems are free?
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400 problems are free across all difficulty levels and topic areas. Free problems are selected to give you a representative sample of easy, medium, and hard questions across the full problem set.
Do I need an account?
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A free account (Google or GitHub sign-in) is needed to track progress and unlock Pro. Sign-in takes seconds.
Are the problems AI-generated?
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No. The ~400 free problems are built exactly the same way as the Pro ones — the only difference is how many you get. The best way to judge is to work through the free set and decide for yourself before paying anything.
