Airbyte is a data integration platform that syncs data from APIs, databases, and files into warehouses and lakes, available self-hosted or as a managed cloud service.

Fivetran is a commercial, fully managed data movement platform with maintained connectors, automated schema handling, and consumption-based pricing.

dbt is a transformation framework that compiles modular, version-controlled SQL models and runs them inside the warehouse, with testing, documentation, and lineage built in.