Syntho
Amsterdam synthetic data engine that mixes masking, rules and AI generation under feature-based pricing
Quick Overview
| Company | Syntho B.V. |
|---|---|
| Category | Synthetic Data Platforms |
| Headquarters | Amsterdam, Netherlands |
| Founded | Not stated |
| EU Presence | Yes - Netherlands (EU) |
| Data Location | Customer's own environment (vendor states it has no access) |
| Open Source | No |
| GDPR Compliant | Yes |
| Self-Hosting | Yes, deployed in the customer's environment |
| Main Features | Sensitivity scanner, consistent mapping, rule-based and formula-based data, subsetting, AI-generated data, quality report, upsampling, REST API, connectors |
| Pricing | Basic, Standard and Ultimate plans on quote; no consumption charges stated |
| Best For | Software teams that need production-like test data across several databases |
| Replaces | Gretel, NVIDIA NeMo Data Designer |
Detailed Review
Syntho describes itself as an Amsterdam-based company that lets organisations work with synthetic data. Its pitch leans toward test data management, with demo data and data sharing as the other main uses.
On 9 June 2026 it announced that it had acquired the MOSTLY AI brand, which now trades as MOSTLY AI, powered by Syntho.
Three methods, one run
Masking replaces sensitive values after a scanner finds them, rule-based generation builds data from formulas and patterns, and the AI route learns the statistics of production tables. The vendor says the methods can be combined in a single job.
A quality assurance report accompanies AI-generated sets, and an AI assistant and upsampling are listed under the same heading.
Pricing without meters
Plans are chosen by feature, database connections and connector types. The pricing page says there is no fee per generation, per database or per workspace, and that support is included.
No amounts are printed, so a quote is still required, but the structure removes usage surprises.
Who is on the customer wall
Logos on the home page include KPN, Philips, Nederlandse Spoorwegen, Leiden University Medical Center and Statistics Netherlands. The site also links an external evaluation by SAS.
Limitations to Consider
The site names no certifications and no free trial, and amounts are never printed, so comparison with Octopize is only possible after a demo. Its sweet spot is relational and test data; teams focused on clinical cohorts will look at Aindo. The MOSTLY AI brand deal is recent, so product roadmaps may still shift.
Who Should Use Syntho
Development, QA and data teams in Europe that need realistic copies of relational databases and want a vendor under Dutch law deploying inside their own network.
Pros and Cons
Pros
- Three generation methods in one engine
- No usage-based fees stated
- Deploys in your environment
- Connectors plus REST API
- Public customer references
Cons
- Prices only on request
- No trial or open-source edition mentioned
- No certifications listed on the site
- Recently acquired the MOSTLY AI brand
Alternatives to Syntho
Other European synthetic data platforms worth comparing before you decide:
Octopize
France · Avatar anonymisation with synthetic data and public price tiers
Dedomena
Spain · Madrid platform pairing validation, anonymisation and synthetic data
Aindo
Italy · Trieste synthetic data for clinical evidence and public health
MOSTLY AI
Austria · Open-source synthetic data SDK plus a managed data platform
See all European synthetic data platforms or compare them directly against Gretel on our alternatives page.
Frequently Asked Questions
No. Its pricing page describes feature-based plans with no consumption charges, no fee per generation and support included.
Syntho announced on 9 June 2026 that it acquired the MOSTLY AI brand, which continues as MOSTLY AI, powered by Syntho.
The vendor says it is deployed in your own environment so that Syntho has no access to your data.