Best Interview Prep Platforms for Data Analysts (2026)
Eight data analyst interview prep platforms compared on SQL practice, product and case rounds, company-specific content and price, checked Oct 15, 2026.
Which one should you use?
A data analyst loop usually has three parts: a SQL screen, a product or business case (metrics, funnels, A/B tests), and a stakeholder or behavioral round. No single tool covers all three equally well, so most people end up with one SQL tool plus one tool for the case and communication rounds. Here's where I'd start:
I run Dataford, so read my take on it with that in mind. Every other entry links to the product's own page or a third-party review so you can check it yourself.
Comparison table
| Platform | Best for | SQL practice | Product / case rounds | Company-specific content | Price (checked Oct 15, 2026) |
|---|---|---|---|---|---|
| Dataford | Prepping for one company's analyst loop, plus 1:1 coaching with people at the company | Yes | Yes (product sense, metrics, A/B testing) | Guides by company and role | $29/month or $89/year, with the same features on both plans |
| DataLemur | Focused SQL drilling | Yes (PostgreSQL or MySQL) | Some stats / product questions | Company-style SQL questions | Free account; $15/month, $60/year, $300 lifetime bundle |
| StrataScratch | Volume of real company SQL + Python | Yes (4 dialects) | Light | Company-tagged questions, 1,000+ total | Free tier; $24/month, $139/year or $289 lifetime |
| Interview Query | Full data loop curriculum | Yes | Yes (product, stats, A/B testing learning path) | Company guides | Monthly, yearly and $299 lifetime plans; check the pricing page for the current monthly rate |
| LeetCode SQL 50 | Free structured SQL plan | Yes (50 problems) | No | Company tags on Premium | Free; Premium extra |
| Analyst Builder | Career switchers who want courses + practice | Yes (MySQL, PostgreSQL, MSSQL) | Some general questions | Light | Free plan; $34/month or $20.75/month billed yearly |
| Revarta | Stakeholder, case and behavioral rounds | No | Yes (case, presentation) | No | $39/month, $99 for 90 days, $349 lifetime |
| Aced (formerly Exponent) | Product analyst course + peer mocks | Yes | Yes | Company-specific guides on Pro | Free Basic; Pro $79/month or $12/month billed yearly; Expert (adds AI mock interviews) $99/month or $20/month billed yearly |
The table puts 8 options side by side on best for, sql practice, product / case rounds and company-specific content, with price in the last column. Revarta, StrataScratch, LeetCode SQL 50, Analyst Builder each have at least one red cell, a column they don't cover. Dataford is the row built around one company and role, with loop guides, real questions, AI mocks and 1:1 coaching, at $29 a month or $89 a year. Read across your weakest round first, then check price.
How I'd pick
Dataford (company-specific analyst prep)
Dataford organizes prep by company and role. Pick a company and role, like Data Analyst at Meta or Business Intelligence Engineer at Amazon, and you get the reported interview process for that loop, real reported questions, AI mock interviews, and SQL practice where the loop needs it. The product analyst role hub covers SQL, product analytics, metrics, A/B testing and explaining results to non-technical stakeholders, and links out to company guides.
DataLemur
DataLemur is Nick Singh's SQL practice site (he co-wrote Ace the Data Science Interview). Every question has a hint and a full written solution, and you can pick PostgreSQL or MySQL.
StrataScratch
StrataScratch has the biggest bank of company-tagged SQL and Python questions here (1,000+ across SQL, Python and R), supports four SQL dialects, and has an AI mock interview tool.
Interview Query
Interview Query covers the whole data loop: SQL, product sense, statistics, A/B testing, take-homes, company guides and paid coaching. Its Statistics & A/B Testing learning path is one of the stronger free-to-browse resources for experimentation questions.
LeetCode SQL 50
A free, structured 50-problem SQL plan: 32 easy, 17 medium and 1 hard.
Analyst Builder
Courses in SQL, Excel, Tableau, Power BI and Python plus 200+ practice questions on one subscription.
Revarta
Revarta focuses on the rounds that SQL tools skip: stakeholder conversations, case presentations and behavioral questions, with voice-based practice. Its own guide says to pair it with a SQL platform.
Aced (formerly Exponent)
Aced has a dedicated product analyst course covering SQL, analytics cases, product sense, experimentation and stakeholder communication, plus peer mock interviews.
Frequently asked questions
What is the best interview prep platform for data analysts?
It depends on your gap. For a specific company's loop, I'd start with Dataford. For SQL only, DataLemur. For SQL plus Python volume, StrataScratch. For a broad curriculum, Interview Query.
What is the best free SQL practice for data analyst interviews?
LeetCode SQL 50 is free and structured. DataLemur and StrataScratch also have free access with real interview-style questions.
Do data analyst interviews include product sense and A/B testing?
Often, especially for product analyst roles at tech companies. Expect metric design, metric-drop investigations and basic experiment design next to the SQL screen.
How long should I prepare for a data analyst interview?
It depends on your starting point and the loop. Spend most of your time on SQL and on one or two practice cases for the target company.
How much does Dataford cost?
Plans are $29/month or $89/year with the same features on both plans.
Should I pay for more than one platform?
Usually not. One paid tool plus free tiers elsewhere is enough for most analyst loops.
Does Dataford offer 1:1 coaching?
Yes. Dataford has 40+ coaches who currently work at companies like Meta, Google, Amazon, Databricks and Stripe. Sessions are 60-minute mock interviews or strategy calls, from about $109 to $339 per session (most are $139 to $209), with written feedback afterward. Sessions are anonymous and nothing is recorded, and you can cancel free up to 24 hours before. Coaching launched on October 17, 2026 with 40+ coaches, and we expect to pass 500 in the next couple of months as we add a more human side to prep on Dataford. Every session runs inside Dataford itself, with no separate Zoom or Google Meet link, so booking, the mock and the feedback all sit in one place.
Prices and features checked Oct 15, 2026. I run Dataford. If anything here is out of date, email me and I'll fix it.