Best Open-source ETL & Data Integration tools

Meltano

Declarative code-first data integration engine for modern pipelines

Apache Spark

Fast, unified engine for large-scale data analytics

Airbyte

Data integration platform for ELT pipelines from any source

CocoIndex

Ultra-performant data transformation framework for AI pipelines

Crawl4AI

Turn the web into clean, LLM-ready Markdown instantly

Apache SeaTunnel

Multimodal distributed data integration for massive-scale synchronization

OLake

Blazing-fast database replication to Apache Iceberg tables

CloudQuery

High-performance ELT framework powered by Apache Arrow

Artie Transfer

Real-time CDC replication from OLTP to OLAP databases

Mara Pipelines

Lightweight Python ETL framework with PostgreSQL and web UI