meltano/meltano
Meltano
Meltano is an open-source platform for building, running, and orchestrating ELT (Extract, Load, Transform) data pipelines. It provides a declarative, YAML-driven configuration system that defines entire pipeline workflows, including data connectors, schedules, and transformations, without requiring imperative code. The platform is built on the Singer specification for data connectors and integrates with dbt for SQL-based transformations and Apache Airflow for scheduling and orchestration.
What distinguishes Meltano is its comprehensive approach to pipeline management, combining a curated catalog of over 600 pre-built connectors with the ability to build custom ones using a dedicated plugin SDK. The platform supports multiple deployment models, including self-hosted infrastructure, Docker containers, and a managed cloud service that offloads execution and monitoring. It also features workspace isolation for separating projects and teams, vault-based secret injection for secure credential management, and integration with external monitoring tools for operational visibility.
The platform covers the full lifecycle of data integration, from discovering and installing connectors to configuring replication methods and selecting specific tables and columns for extraction. It supports running end-to-end pipelines that combine extraction, loading, and transformation in a single workflow, with the ability to schedule recurring runs and automate complex dependencies. For organizations needing custom data sources or destinations, Meltano provides a software development kit for building and registering new connectors that become immediately usable within the platform.
Documentation and installation options include self-hosted deployment guides, Docker Compose configurations, and GitLab CI/CD templates for automated image building.
