Mockaroo vs Gretel.ai

From $60 per year (indicative, Silver)

Free tier available

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

Consumption-based on generated records; enterprise agreements available.

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

Free tier with a monthly credit allowance.

Established

Mockaroo LLC · since 2014

Emerging

Gretel (NVIDIA) · since 2019

• 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.

• Formal differential-privacy guarantees rather than best-effort masking.
• Synthetic data preserves statistical relationships useful for analytics and model training.
• Privacy and quality scores make the trade-off explicit.

• 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.

• Model training adds time and cost compared to rule-based masking.
• Overkill when simple anonymisation would satisfy the requirement.
• NVIDIA acquisition changes the strategic outlook.

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

Regulated organisations that need shareable data with defensible privacy properties.