Open-source Test Data Management (TDM) and data anonymization platform focused on secure production-like development workflows.

Greenmask enables organizations to safely use realistic data in development, testing, staging, and AI-assisted engineering environments without exposing sensitive information.

• Data anonymization — mask and transform sensitive data during logical dumps using configurable transformation pipelines.
• Subsetting — extract only the required portion of production data while preserving relational consistency.
• Synthetic data generation — generate realistic replacement values and datasets for non-production environments.
• Test data management — provision secure, production-like datasets for development, testing, staging, CI pipelines, and ephemeral environments, without keeping long-lived raw production copies around.

Greenmask is built around a stateless, stream-oriented architecture:

Database → Logical Dump Stream → Transformation Pipeline → Storage / Restore

• In-flight anonymization — transformations run directly within the dump stream.
• No raw data at rest — sensitive datasets never need to be persisted unmasked.
• Stateless — nothing to host or maintain between runs, which makes it easy to automate in CI and infrastructure pipelines.
• Extensible — built-in transformers can be complemented with your own.

This model is designed to support secure development and testing workflows in regulated and compliance-driven environments.

• Website: https://www.greenmask.io
• Documentation: https://docs.greenmask.io
• Questions and ideas: GitHub Discussions
• Bug reports and feature requests: GitHub Issues
• Chat: Discord
• Security: see the Security Policy or write to security@greenmask.io

For enterprise support and partnership inquiries, contact us through the website or at support@greenmask.io.

Greenmask is evolving toward a platform designed for secure, production-like, ephemeral development environments.

Our long-term direction combines:

• Test Data Management (TDM)
• In-flight anonymization
• Ephemeral environments
• API-first infrastructure workflows
• AI-assisted development workflows
• DBaaS and infrastructure integrations

This architecture is intended to help developers and AI-assisted workflows rapidly provision isolated feature-specific environments and safely iterate on realistic datasets.

Conceptual architecture:

This roadmap is being developed in collaboration with Solanica and OpenEverest as part of a broader effort to build open-source, enterprise-grade infrastructure for modern software delivery workflows.

Read more in the announcement blog post.

Greenmask is open-source software released under the Apache 2.0 License.