Mockaroo vs Snaplet Seed
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
From $60 per year (indicative, Silver)
Free tierFree and open source
Open sourceWhat drives the bill
The metric that actually scales your invoice.
Cheap for what it does; higher tiers raise row limits and add API quota.
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.
Free tier
Free for up to 1,000 rows per download and a limited number of saved schemas.
Everything, self-hosted
Open source
MIT
Self-hostable
No-code authoring
Languages
Platforms
Fits teams
Adoption
Established
Mockaroo LLC · since 2014
Emerging
Supabase community (formerly Snaplet) · since 2021
Strengths
- 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.
- 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.
Limitations
- 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.
- 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.
Best for
Quickly producing a realistic dataset for a demo, a load test or a new environment.
TypeScript teams that want each developer and CI run to start from a clean, coherent database.
Pricing last reviewed August 2026 and is indicative only — confirm on each vendor’s own page.