Mockaroo vs Neosync

From $60 per year (indicative, Silver)

From $20 per user/month (indicative, cloud)

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

Self-hosting is free; the cloud service is priced per user and record volume.

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

Open-source self-hosted edition is free.

Established

Mockaroo LLC · since 2014

Emerging

Nucleus Cloud · since 2023

• 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.

• Open source and self-hostable, so sensitive data never leaves your infrastructure.
• Preserves referential integrity across tables.
• Far cheaper than the commercial data-privacy platforms.

• 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.

• Young project with a small community.
• Fewer database connectors than the incumbents.
• Self-hosting is operational work.

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

Teams that need anonymised test data but cannot justify enterprise pricing.