Greenmask
Greenmask: A focused command-line utility for anonymizing and reshaping PostgreSQL dump workflows. Ranked #11 of 25 in Data Masking Software by our editors (8.2/10); pricing: Free plan; best for open-source teams anonymizing database dumps.
At a glance
- Editor score8.2 / 10
- PricingFree plan
- Best forOpen-source teams anonymizing database dumps
- Free planYes
- Paid fromNone
- Masking methodsStatic
- Facts checked22 Sep 2026
Where it wins
- Static masking and synthetic generation during logical database dumps
- Referentially intact subsetting for smaller database copies
- Validation, diffs, and S3-compatible storage support
Where it doesn't
- Designed primarily for PostgreSQL environments
- Self-hosted deployment requires operational ownership
- Command-line workflow may not suit teams seeking a visual interface
Our verdict on Greenmask
Greenmask is an open-source command-line utility for logical database dumping, anonymization, synthetic data generation, and restoration. It is designed primarily for PostgreSQL and supports development, staging, analytics, testing, backup, and restoration workflows involving sensitive database data. Its stateless logical dump proxy model works with standard PostgreSQL utilities, making it a focused option for teams that need to transform database content as part of export and restore processes. Linux, macOS, and self-hosted deployments are supported.
The data transformation feature set is the main reason to consider Greenmask. Static anonymization and masking can run during dumps, while built-in and custom transformers support synthetic data generation. Transformations can use deterministic hashes or random values, and dynamic parameters provide additional control. Database subsetting preserves referential integrity, which helps create smaller working datasets without breaking relationships. Validation, data diffs, and schema diffs add checks around the transformed output. Local directories and S3-compatible storage cover two practical storage patterns for dump workflows.
Greenmask is particularly suited to open-source teams that want to keep database masking in a self-hosted workflow and need more than simple value replacement. Its emphasis is narrower than a broad data security platform: the product centers on logical database dumps, transformations, subsetting, and restoration rather than a wide application ecosystem. Teams working primarily with PostgreSQL and command-line tooling should find the feature coverage aligned with this use case. Organizations seeking a visual interface, broader database focus, or a managed service should consider a different category fit. The project is presented as open-source software, with a free plan available.
Greenmask pricing
Greenmask fact sheet
| Free plan | Yes |
|---|---|
| Paid from | None |
| Masking methods | Static |
| Synthetic data | Yes |
| Referential integrity | Yes |
| Deployment options | On-premises |
| Data subsetting | Yes |
| API access | Not verified |
| Database connectors | Not verified |
| Deployment | Self-hosted |
| Platforms | Linux, macOS |
| Support | Community, Docs, Email |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan |
| Website | github.com |
| Facts checked | 22 Sep 2026 |
Alternatives to Greenmask
- IBM Optim Data PrivacyA broad enterprise privacy toolkit with sales-led pricing and a 90-day trial reference.9.4
- DataVeilA focused masking tool with broad database coverage and a useful free Community plan.9.2
- BigID Data MaskingA policy-driven masking platform for governed data across hybrid enterprise environments.9.1
See all Greenmask alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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