Faker vs Mockaroo

Free and open source

From $60 per year (indicative, Silver)

Free and open source. You pay in engineering time and CI minutes.

Cheap for what it does; higher tiers raise row limits and add API quota.

Everything, self-hosted

Free for up to 1,000 rows per download and a limited number of saved schemas.

Category standard

OSS community · since 2010

Established

Mockaroo LLC · since 2014

• Realistic, locale-aware data catches layout bugs that 'test test test' never will.
• Seedable, so generated data is reproducible when a test fails.
• Available in every major language with a similar API.

• 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.

• Generated data has no referential integrity or business rules — that is your job.
• Random data makes failures harder to reproduce unless you seed deliberately.
• Not a substitute for production-shaped data at realistic volume.

• 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.

Every project that needs fixtures more realistic than placeholder strings.

Quickly producing a realistic dataset for a demo, a load test or a new environment.