Snaplet Seed vs Mockaroo
Feature checklists rarely decide anything. What decides it is the pricing metric, who has to write the tests, and which limitation you can live with.
Entry price
Free and open source
Open sourceFrom $60 per year (indicative, Silver)
Free tierWhat drives the bill
The metric that actually scales your invoice.
Free and MIT-licensed. Snaplet the company shut down in August 2024 and snaplet.dev no longer resolves; this is a community-held library, not a service.
Cheap for what it does; higher tiers raise row limits and add API quota.
Free tier
Everything, self-hosted
Free for up to 1,000 rows per download and a limited number of saved schemas.
Open source
MIT
Self-hostable
No-code authoring
Languages
Platforms
Fits teams
Adoption
Emerging
Supabase community (formerly Snaplet) · since 2021
Established
Mockaroo LLC · since 2014
Strengths
- Schema-aware generation means the data actually inserts and the app actually works.
- Deterministic seeds make failing tests reproducible.
- Good TypeScript ergonomics with Prisma and Drizzle.
- No code required — an analyst or tester can design a dataset themselves.
- Very large library of realistic field types including regional formats.
- Formula fields allow simple business rules between columns.
Limitations
- Effectively unmaintained: the last npm release (0.98.0) was July 2024 and the last commit to the default branch was August 2024, though the repo is not archived.
- PostgreSQL-centric.
- TypeScript ecosystem only.
- Referential integrity across related tables is limited.
- Free-tier row limits are low for realistic volume testing.
- Data is generated on a third-party service, which needs a privacy check for schema sensitivity.
Best for
TypeScript teams that want each developer and CI run to start from a clean, coherent database.
Quickly producing a realistic dataset for a demo, a load test or a new environment.
Pricing last reviewed August 2026 and is indicative only — confirm on each vendor’s own page.