Ready for any data science case interview, at any company
Start with product sense and cases. Go as deep as you need into A/B testing, causal inference, and statistics.
DataCase Core
Product sense and cases.
You are charged $15 USD every month. Renews automatically until you cancel.
DataCase Complete
Everything, including experimentation and stats.
Everything in Core, plus A/B testing, causal inference questions, and the full Probability & Statistics track.
You are charged $19 USD every month. Renews automatically until you cancel.
All prices are in USD. Taxes may apply and will be calculated at checkout. There is no free trial and no introductory discount — the price you see is the price that recurs.
What's in each plan
| Included | Core$15 | Complete$19 |
|---|---|---|
Product Sense & Metrics Every company — the product, the users, the metrics that matter | ||
Product Case questions Every company — full senior-level walkthroughs and grading rubrics | ||
Crash Courses Every concept explainer — experimentation, causal inference, metrics, ML | ||
A/B Test & Causal Inference Every company — experiment design, interference, causal methods | ||
Probability & Statistics The complete track — tutorials plus the full question bank | ||
New cases every two weeks Senior FAANG data scientists study real job posts and build the questions that role actually gets |
Cancel any time and keep access until the end of the period you've paid for. Every purchase is covered by our 14-day money-back guarantee.
All plans and prices
Every plan we offer, in full. These are the exact amounts you will be charged at checkout.
| Plan | Billed monthly | Billed every 6 months |
|---|---|---|
DataCase Core Product Sense, Product Case, and all Crash Courses. | $15 USD per month, recurring | $79 USD once every 6 months, recurring |
DataCase Complete Everything in Core, plus A/B Test & Causal Inference and the full Probability & Statistics track. | $19 USD per month, recurring | $99 USD once every 6 months, recurring |
All prices are in USD and exclude tax. Taxes may apply and will be calculated at checkout. All plans renew automatically until you cancel. There is no free trial and no introductory discount — the price shown is the price that recurs each period.
Read some of it free first
Five full company breakdowns, twenty complete case and experiment answers covering every question type, and the opening of every crash course — free, no account needed.
Browse the free casesQuestions
- What's the difference between the plans?
- Core covers Product Sense, Product Case questions, and all Crash Courses — enough if you mainly need product and business reasoning. Complete adds the two heaviest technical tracks: A/B Test & Causal Inference for every company, and the full Probability & Statistics track. Most data science interviews test both, which is why Complete is the popular choice.
- Can I upgrade from Core to Complete later?
- Yes. Email us and we'll move you over — you only pay the difference for the remainder of your period.
- Can I cancel anytime?
- Yes. Cancel whenever you like and you keep access until the end of the period you've already paid for. Nothing is charged after that.
- How do refunds work?
- If DataCase isn't right for you, email us within 14 days of your purchase and we'll refund it in full — no reason needed. Details in our Refund & Subscription Policy.
- Are taxes included in the price?
- Prices are shown in USD excluding tax. Depending on where you live, sales tax or VAT may be added — the exact amount is calculated and shown at checkout before you pay.
- Is there a free trial or introductory price?
- No. There is no trial and no intro discount, so there is no surprise price increase later — you pay the price shown, and that is what recurs each period. A good amount of the site is free to read without an account, and every purchase is covered by the 14-day money-back guarantee.
- What payment methods do you accept?
- All major credit and debit cards. Payment is handled by Paddle, our reseller and Merchant of Record — so “Paddle” is what appears on your bank statement, and your card details never touch our servers.
- Is new content still being added?
- Yes — new companies, roles, and questions are researched and added regularly, and every subscriber gets them at no extra cost.
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