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Greenmask
What it is
Greenmask is a free, open-source utility for logical database backups, anonymization, synthetic data generation, and restoration. It currently supports PostgreSQL and can store backups in local directories or S3-like remote storage. Deterministic and random transformers, dynamic parameters, masking, and domain-based transformations let teams configure how data is transformed. Configuration validation can show warnings along with data and schema differences; settings can also carry across partitions of partitioned tables. Greenmask supports parallel dumping and restoration, as well as parallel compression with pgzip. Its logical-dump approach does not require changes to the existing database schema, and its dumps can be restored with pg_restore. It can connect with CI/CD systems for automated anonymization and restoration. The utility can be self-hosted on Linux or macOS, with installation options including Docker, Homebrew, an install script, or a source build. A Docker Playground with sample databases is available. Support for MySQL and MongoDB is in development; Windows is not supported yet.
For and against
For
- Free and open source
- Supports anonymization and synthetic data generation
- Can run parallel dumps and restorations
- Integrates with CI/CD workflows
Against
- Currently supports PostgreSQL only
- Windows is not supported yet
- Large images or many layers can cause out-of-memory errors
- Error handling is limited
The verdict
Greenmask combines PostgreSQL logical backups with configurable transformations and restoration workflows. Its current database support is limited to PostgreSQL, and the maker says Windows is not supported yet.
Who it suits
It suits data engineers, DevOps teams, developers, and machine learning teams who need PostgreSQL backup, masking, or test-data workflows. Healthcare and finance organizations are also among its intended users.
Plans and prices
Greenmask
Open-source utility · logical database dumping, anonymization, synthetic data generation and restoration
Read 8 Oct 2026 · docs.greenmask.io
On the record
- Database compatibility
- Greenmask currently supports PostgreSQL; the maker says support for MySQL, MongoDB, and other databases is in development.greenmask.io · read 8 Oct 2026
- Database support
- The maker's site says Greenmask currently supports PostgreSQL and S3, while support for MySQL and MongoDB is in development.greenmask.io · read 8 Oct 2026
- Data transformations
- It provides deterministic and random transformers, dynamic parameters, and configurable transformations for database data.docs.greenmask.io · read 8 Oct 2026
- Data validation
- Configuration validation can provide transformation warnings, data diffs, and schema diffs.docs.greenmask.io · read 8 Oct 2026
- Installation
- The maker documents installation through an install script, Docker, Homebrew, or building from source; the install script works on Linux and macOS, and Windows is not yet supported.docs.greenmask.io · read 8 Oct 2026
- Integrations
- Greenmask can integrate into CI/CD systems for automated anonymization and restoration.docs.greenmask.io · read 8 Oct 2026
- Paid services
- The maker offers paid custom development for urgent or enterprise-specific feature requests.greenmask.io · read 8 Oct 2026
- Partitioned tables
- Transformation configurations can be inherited across partitions of partitioned tables.docs.greenmask.io · read 8 Oct 2026
- Performance
- It supports parallel dumping and restoration, as well as parallel compression with pgzip.docs.greenmask.io · read 8 Oct 2026
- Platform limit
- The install script works on Linux and macOS; the documentation says Windows is not supported yet.docs.greenmask.io · read 8 Oct 2026
- Playground
- Greenmask Playground is a Docker sandbox with sample databases for trying the utility.docs.greenmask.io · read 8 Oct 2026
- PostgreSQL compatibility
- Greenmask says it is backward-compatible with PostgreSQL utilities, and its dumps can be restored using pg_restore.docs.greenmask.io · read 8 Oct 2026
- Purpose
- Greenmask is an open-source utility for logical database backups, anonymization, synthetic data generation, and restoration.docs.greenmask.io · read 8 Oct 2026
- Schema behavior
- Greenmask operates as a logical dump and does not require changes to the existing database schema.docs.greenmask.io · read 8 Oct 2026
- Security and schema
- Greenmask operates as a stateless logical dump and says it does not change the existing database schema.docs.greenmask.io · read 8 Oct 2026
- Storage
- It supports local directories and S3-like remote storage.docs.greenmask.io · read 8 Oct 2026
- Support
- The maker advertises 24/7 expert assistance, technical guidance and custom product development services.greenmask.io · read 8 Oct 2026
- Transforms
- It supports deterministic and random transformers, dynamic parameters, masking, and custom domain-based transformations.docs.greenmask.io · read 8 Oct 2026
