Free
Try it, no card required
$0
Access to limited features
50 AI credits/mo
30% off Lifetime plans — enter code at checkout
Simple pricing for Data Science & AI interview prep
One plan, full access for Data Scientists, Machine Learning Engineers, and AI Engineers. Start free, upgrade when you're ready to interview.
Choose your plan
Every paid plan includes full access to questions, solutions, projects, hints, and grading. Only billing and AI credits differ.
Monthly
Full access, cancel anytime
$24/mo
Billed monthly, cancel anytime
1,000 AI credits/mo
Yearly
Best value for an active search
$11.58/mo
Billed annually as $139
1,000 AI credits/mo
Lifetime
Pay once, own it forever
$289
One-time payment, no renewals
25,000 credits — never expire
All paid plans include a 5-day money-back guarantee. Cancel anytime. See full details ↓
Buy More AI Credits
Out of AI credits? Top up anytime — no subscription change needed.
Get more credits →Students & Educators
Discounted pricing for verified students and educators.
Enterprise or University
Buy plans in bulk and get a discount.
Everything in every paid plan
*1,000 credits/mo on Monthly and Yearly. Lifetime includes 25,000 credits, one time, that never expire.
- 1000+ coding questions (SQL, Python, R)
- 500+ ML, stats, system design questions
- 50+ real data projects and take-homes
- Hints, videos, and full solutions
- New content added regularly
- Access to user solutions and community discussion boards
- AI mock interviews
- AI grading for data projects, mini-analyses, and take-homes
- AI grading for concept interview questions
- Cloud-hosted Python notebooks
- AI credits included*
- AI chat assistant for hints and guidance
What's included
One plan. Full access to solutions, hints, mock interviews, AI grading, notebooks, and more.
All paid plans include a 5-day money-back guarantee. Cancel anytime.
| Features | Free | Premium |
|---|---|---|
| Questions | ||
Coding Questions | 75+ | 1000+ |
Solutions, Hints & Walkthroughs | 75+ | ✓ |
User Solutions | 75+ | ✓ |
Concept Questions | ✓ | ✓ |
Debug-AI-Code Questions | Limited | ✓ |
Learning Paths (SQL & Python) | ✓ | ✓ |
AI Guidance for problem-solving help | — | ✓ |
AI Grading for Concept Questions | — | ✓ |
Defense Rehearsal for Interview QuestionsComing soon | — | ✓ |
| Mock Interviews | ||
AI Mock Interviews | — | ✓ |
| AI Usage | ||
AI Credits per Month | 50 | 1,000 |
| Data Projects & Mini-Analyses | ||
Project Access | 50+ | 50+ |
Project Solutions | — | 30+ |
Downloadable Datasets | Limited | ✓ |
Cloud-Hosted Python Notebooks (SQL Capable) | — | ✓ |
Public App Hosting | — | ✓ |
AI Scoring for Data Projects & Mini-Analyses | — | ✓ |
Defense Rehearsal for Data Projects & Mini-AnalysesComing soon | — | ✓ |
| AI Tools | ||
AI Dataset Generation | — | ✓ |
AI Code Generation | — | ✓ |
Fix & Optimize Your Code | — | ✓ |
| Other | ||
Personalized Dashboard & RoadmapComing soon | ✓ | ✓ |
Publicly Share Your Portfolio Page | ✓ | ✓ |
Student & educator discounts Verified students and educators can unlock reduced pricing on eligible plans. | Always free | Up to 20% off |
Need a team plan? Talk to us about discounted seats for cohorts, bootcamps, and universities.
Contact sales- members worldwide
- 750,000+members worldwide
- interview questions
- 1000+interview questions
- companies represented
- 200+companies represented
What learners say
“StrataScratch is hands down the best platform if you are preparing for or am working as a data analyst/scientist/engineer. Happy to share that I have gotten an offer from Amazon as a Data Analyst.”
TrimanAmazon“StrataScratch is awesome! It's the first place I found that allows you to use python in addition to SQL. The Facebook questions were quite similar to the ones that I saw in my interview today.”
RyanFacebook“StrataScratch and the community really helped me prep for the interview — I ended up getting the Data Scientist internship!”
JoeMicrosoft
Frequently asked questions
Can I change plans later?
Absolutely — upgrade or downgrade anytime. Downgrades to the free plan will be effective once the current billing cycle ends. Your premium plan will not renew. Upgrades are effective immediately.
Do paid plans come with a refund?
Yes — every paid plan includes a 5-day money-back guarantee.
Do I keep my progress if I cancel?
Your progress including submitted solutions and tracking remains on your account even if you cancel. Data projects hosted on our notebooks require an active subscription — you can keep everything by exporting to GitHub or downloading the files.
What can 1,000 AI credits get me per month?
That's average usage for things like:
- 400 chat turns
- 5 mock interviews
- 2 data project gradings
- 10 Grade My Answer submissions (concept questions)
- 3 mini-analyses
- Plus AI tools usage
This is an average — actual usage depends on how big your data projects are and how complex your AI tool usage is.
What are AI Mock Interviews and Answer Scoring?
AI Mock Interviews are interactive coding sessions with an AI interviewer that asks questions, reviews your solution, and gives feedback. Answer Scoring grades your written answers to concept questions (probability, statistics, product sense, GenAI, and others) against a rubric and highlights gaps.
What does "limited" access mean?
Limited access gives you a smaller subset of content so you can try features before upgrading.
How do student and educator discounts work?
Verified students and educators receive discounted pricing on eligible plans.
What are Cloud-Hosted Notebooks and Public App Hosting?
Cloud-Hosted Notebooks let you run Python and SQL in your browser. Public App Hosting allows you to deploy and share your project as a live web app.
Can I buy more AI credits?
Yes — if you run out before your next billing cycle, you can top up anytime for $5 per 1,000 credits. Look for the "Buy More AI Credits" section on this page — no subscription change needed. Top-up credits expire 1 year after purchase.
Still deciding?
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5-day money-back guarantee · Cancel anytime