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DataLemur vs Interview Query

DataLemur is cheap, focused SQL and data-science drilling; Interview Query is pricier but adds 1,600+ company-specific interview guides.

Side by side

DataLemur Interview Query
Vendor DataLemur Interview Query
Pricing model Free tier + paid plans Subscription
Free tier Yes No
Deployment Cloud Cloud
Open source No No
Best for Candidates drilling SQL and data science fundamentals for interviews on a tight budget. Candidates who want practice tied to a specific employer's known interview format, not just generic question drilling.
Pricing

Free tier gives limited questions; paid tiers are monthly, annual or a one-time lifetime purchase, with no discounts or trials.

Monthly $15/month
Yearly $60/year
Lifetime $300 one-time

Prices read from the vendor's own page on September 21, 2026. Vendors change prices; check the source before you budget.

Monthly or annual subscription, or a one-time lifetime-access purchase; vendor pricing page could not be fetched to confirm current figures.

Pricing has not been verified yet — see the vendor's site.

Features
  • SQL interview questions run in an in-browser editor
  • Data science questions covering statistics, probability and ML
  • Questions attributed to specific companies
  • Free SQL cheat sheet and company-specific interview guides
  • Bundled "Ace the Data Job Hunt" video course (paid tiers)
  • 1:1 coaching call on the lifetime tier
  • 1,000+ SQL, Python, statistics and ML interview questions
  • 1,600+ company-specific interview guides
  • In-browser code runner with detailed solutions
  • Take-home-style challenge assessments with feedback
  • 40+ hours of interview-prep course content
  • Priority support on paid plans

Verdict

Both run SQL and data-science interview questions, attributed to the companies reportedly asking them, in a browser code editor, and both assume you already know SQL and basic statistics — they drill interview performance rather than teach the concepts from scratch. The decision comes down to breadth versus price. DataLemur stays scoped to SQL and data-science fundamentals and prices for volume: a $15/month plan, a $60/year plan that adds a bundled video course, and a one-time $300 lifetime tier that throws in a coaching call and a signed book. Interview Query is subscription-only with no full-question free tier, but its catalogue goes further — SQL, Python, statistics, machine learning and product-sense case studies, plus over 1,600 company-specific guides describing what a given employer's interview loop actually looks like, and 40+ hours of course content.

Choose DataLemur if

  • You want cheap, repeated SQL and data-science drilling without paying for content you will not use.
  • A one-time lifetime purchase appeals more than an ongoing subscription.
  • Your interviews are mostly SQL and statistics rather than product-sense case studies.

Choose Interview Query if

  • You have specific target employers and want to know their interview format in advance.
  • Your interviews include product-sense or case-study rounds, not just SQL and stats.
  • You would rather pay more for breadth — Python, ML, and course content — than assemble it from several free sources.

The honest caveat

Interview Query's company-specific guides are only as good as their currency: interview loops change, and a guide describing a process from a year or two ago can steer you toward preparing for the wrong round. Neither site replaces a mock interview with another person — both measure whether you can answer a known question format, not whether you can think out loud under real pressure with someone watching. Budget for at least one live mock interview alongside either tool.

Last reviewed September 22, 2026

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