Tonic.ai vs Gretel.ai
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
Quote on request
Quote onlyQuote on request
Quote onlyWhat drives the bill
The metric that actually scales your invoice.
Enterprise quote-based pricing by data volume and connected databases.
The old credit-based self-serve tier is gone. The successor microservices are licensed through NVIDIA AI Enterprise; NeMo Data Designer can be tried on build.nvidia.com.
Free tier
Free trial.
Open source
Self-hostable
No-code authoring
Languages
Platforms
Fits teams
Adoption
Established
Tonic.ai · since 2018
Emerging
NVIDIA (formerly Gretel) · since 2019
Strengths
- Preserves referential integrity and statistical distribution, so applications behave as they do in production.
- Directly addresses the GDPR and HIPAA exposure created by production data in lower environments.
- Subsetting produces a small but coherent slice rather than a full copy.
- Formal differential-privacy guarantees rather than best-effort masking, now via DP-SGD in NeMo Safe Synthesizer.
- Synthetic data preserves statistical relationships useful for analytics and model training.
- Backed by NVIDIA's platform investment rather than a single startup's runway.
Limitations
- Expensive, with enterprise-only pricing.
- Initial configuration of sensitive-field classification takes real effort.
- Adds a pipeline stage that must be maintained as the schema evolves.
- No longer buyable as Gretel — you are procuring NVIDIA AI Enterprise, which is far heavier than the old self-serve signup.
- Model training adds time and cost compared to rule-based masking.
- Safe Synthesizer trains on a real dataset, so it does not help with greenfield data that does not exist yet.
Best for
Organisations that currently copy production data into staging and know they should stop.
Regulated enterprises already standardising on NVIDIA AI Enterprise. Teams that wanted Gretel's self-serve tier should look at Tonic or Neosync instead.
All of these integrate with: Snowflake, Databricks.
Pricing last reviewed August 2026 and is indicative only — confirm on each vendor’s own page.