Mockaroo is solid, but the free tier stops at 1,000 rows, your schema is sent to its servers, and relational foreign keys are limited. If you want coherent, relational test data without those limits, here's a free alternative.
| Feature | Stella | Mockaroo |
|---|---|---|
| Price | Free, no signup | Free tier, then paid |
| Foreign keys / relational | Yes — parent→child + rollups | Limited |
| Deterministic (seed → same data) | Yes | No |
| 100% synthetic | Yes | Yes |
| Formats | CSV, JSON, SQL, SQLite | CSV, JSON, SQL, Excel |
| Plain-English data Q&A | Yes (Stella) | No |
Comparison reflects each tool’s free offering at the time of writing; check the vendor for current details.
Yes — generate and download with no account.
You never upload real data; everything is synthetic.
Yes — it's fake data, use it anywhere.
More built-in field types and Excel export — both on our roadmap.
Join the Pro waitlist — bulk generation, JSON/SQL/Excel export, and a developer API for generating data on demand.