Data with the story already in it.

Describe the pattern you need. Get a realistic dataset that shows it, ready for Excel or Power BI.

  • 1 Monthly churns 3×Groups that differ
  • 2 Spend follows seatsColumns that move together
  • 3 2% big outliersRare events, at your rate
No signup · no cardPreview 20 rows free

No signup, no card · 2,300+ people signed up · Ready for Excel, Power BI and Tableau · Browse 1,949 ready-made datasets →

Same columns. Different story.

Both datasets have the columnsplanseatsspendchurned

Random generatorchurn by plan
0%20%40%24%Monthly26%Annual25%Enterprise0%20%40%24%Monthly26%Annual25%Enterprise

Nothing to present.

GoMaskchurn by plan
0%20%40%33%Monthly11%Annual5%Enterprise3×0%20%40%33%Monthly11%Annual5%Enterprise3×

Monthly plans churn 3× more.

For data people will look at.

All use cases
Churn overviewCustomers5,000Monthly churn33%Avg spend$412MonthlyAnnualEnterprise3× annual

Dashboards with something to find

Power BI · Tableau · Excel

Try this one
Suspicious claims by repair shop10,000 claims · 3% flaggedShop 14257911121416

Demos that land the point

Pre-sales · consultants · marketing

Try this one
student_c.csvgrade628873599066student_b.csvgrade6951778458student_a.csvattendgrade92%7461%55—8188%70

A different dataset for every student

Lecturers · bootcamps · trainers

Try this one

One sentence in. A dataset out.

  1. 1Describe itPlain English
  2. 2Check 20 rowsFree, no signup
  3. 3Pick a size1,000 to 1M rows
  4. 4Download8 formats, any tool

Things you can say.

Each phrase becomes a pattern that holds in every row.

  • monthly plans churn 3× moreGroups that behave differently
  • spend rises with seatsColumns that move together
  • 2% of payments are fraudRare events at the rate you set
  • 5% missing emails, a few duplicatesMess to clean, on purpose
  • customers with their orders and itemsTables that join
  • use real ICD-10 codesReal values, looked up and cited

Or start from 1,949 ready-made datasets.

Preview any dataset. Full downloads from $1.99.

datasetcolumns

Hospital Readmission Predictionreadmitted · length_of_stay · primary_diagnosis_code22 columnsSubscription Billingbilling_cycle · plan_price · retention_status19 columnsStudent Performance Trackingscore · attendance_status · at_risk_flag23 columnsEmployee Attrition Predictionsalary · overtime · attrition36 columns

Pay once. No subscription.

See pricing
To startFreeFree previews and samples
10,000 rows$12.99A class project$1.30 / 1K
50,000 rows$24.99A dashboard or demo$0.50 / 1K
200,000 rows$59.99A full course$0.30 / 1K
1,000,000 rows$249.99The biggest projects$0.25 / 1K

Rows never expire. Teaching a class? Ask about class packs.

Questions

Why not Kaggle or ChatGPT?

Kaggle has someone else's data, with someone else's story. A chatbot gives you a few rows. GoMask holds your pattern across up to a million, and linked tables still join.

Is any of it real?

No. Every row is generated. Ask for real codes, like ICD-10, and we look them up and cite the source.

Can I use it at work?

Yes: dashboards, client demos, courses and papers.

What should your data show?

Preview 20 rows free
No signup. No card.