Open-source data integration platforms
The open-source data integration platforms engineers most often consider range from ELT tools that load data into warehouses to frameworks that keep business applications in sync.
Published by PicNet, one of the providers below. Details of the other providers come from their own websites, checked on 30 October 2026. How we compare providers.
What we compared
- Licence
- The licence in each project's repository or documentation.
- Language
- What the platform is written in, and what you write integrations in.
- Approach
- ELT into a warehouse, streaming, data flow or application sync.
- Hosting
- Self-hosted, a managed cloud service, or both.
At a glance
| Provider | Maintained by | Licence |
|---|---|---|
| Airbyte | Airbyte, Inc. | Elastic License 2.0 (not to be offered to others as a hosted service); the Airbyte Protocol is MIT. |
| Apache Camel | The Apache Software Foundation | Apache-2.0 |
| Apache Hop | The Apache Software Foundation | Apache-2.0 |
| Apache Kafka (Kafka Connect) | The Apache Software Foundation | Apache-2.0 |
| Apache NiFi | The Apache Software Foundation | Apache-2.0 |
| Centazio | PicNet | MIT |
| dlt | dltHub, Inc. | Apache-2.0 (the commercial dltHub platform has its own licence). |
| Meltano | Meltano | MIT |
The providers, in alphabetical order
Airbyte
Airbyte is a data replication (ELT) platform. It moves data from APIs, databases and files to warehouses, lakes and AI applications through a catalogue of prebuilt connectors (600+, according to its documentation).
- Suits
- Consolidating data from many sources into data warehouses, data lakes and databases.
- Licence
- Elastic License 2.0 (not to be offered to others as a hosted service); the Airbyte Protocol is MIT.
- Language
- Platform in Kotlin and TypeScript; connectors built with a no-code builder, a low-code YAML kit or Python.
- Hosting
- Self-managed on Kubernetes, or Airbyte Cloud (managed).
Apache Camel
Apache Camel is an integration framework that you embed in your own application. It connects systems through routes, using Enterprise Integration Patterns and 350+ connectors.
- Suits
- Connecting applications, services, APIs and data inside Java applications, in the cloud or on premises.
- Licence
- Apache-2.0
- Language
- Java; routes written in the Java, YAML or XML DSL.
- Hosting
- Self-hosted, inside your own application (Spring Boot, Quarkus or standalone), with Camel K for Kubernetes.
Apache Hop
Apache Hop is a metadata-driven data orchestration platform. You design pipelines and workflows visually, then run them on Hop's own engine or on Spark, Flink or Google Dataflow.
- Suits
- Data warehouse population, data migration, data profiling and integrating diverse data sources.
- Licence
- Apache-2.0
- Language
- Java; pipelines designed visually in Hop Gui, plugins written in Java.
- Hosting
- Self-hosted.
Apache Kafka (Kafka Connect)
Kafka Connect is a framework inside Apache Kafka for streaming data between Kafka and other systems through source and sink connectors.
- Suits
- Streaming databases or application data into Kafka topics, and from Kafka topics into storage and query systems.
- Licence
- Apache-2.0
- Language
- Java; connectors implement Kafka Connect's Java interfaces.
- Hosting
- Self-hosted, standalone or distributed.
Apache NiFi
Apache NiFi is a flow-based system that automates moving data between systems. You design, control and monitor the flows in a browser-based interface.
- Suits
- Processing and distributing data between systems, with full data provenance.
- Licence
- Apache-2.0
- Language
- Java; extensions in Java, and native Python processors.
- Hosting
- Self-hosted.
CentazioPublisher of this page
Centazio is a code-first integration platform for .NET. It connects business applications, keeps their data in sync, and stages data into a shared reporting database.
- Suits
- Organisations, and the .NET teams behind them, that need several business systems kept in sync with a full audit trail.
- Licence
- MIT
- Language
- .NET (C#); integrations are written in .NET.
- Hosting
- Self-hosted on AWS, Azure or your own servers, or hosted and managed by PicNet.
dlt
dlt is an open-source Python library. It extracts data from APIs, databases, cloud storage and Python data structures, infers the schema, and loads the data into a destination you choose.
- Suits
- Loading data from varied sources into structured datasets from any Python environment, such as notebooks, Airflow or serverless functions.
- Licence
- Apache-2.0 (the commercial dltHub platform has its own licence).
- Language
- Python; pipelines are written as Python code.
- Hosting
- Runs anywhere Python runs; dltHub offers a managed platform.
Meltano
Meltano is a declarative, code-first ELT engine. It combines extractor and loader plugins, mostly Singer taps and targets, into incremental pipelines.
- Suits
- Getting data from APIs and databases into a warehouse for analytics, with 600+ prebuilt connectors.
- Licence
- MIT
- Language
- Python; connectors are Singer taps and targets.
- Hosting
- Self-hosted, or a managed cloud service.
Questions buyers ask
How do I choose an open-source data integration platform?
Start with the job. Loading data from many SaaS tools into a warehouse suits an ELT platform with many prebuilt connectors. Keeping business applications in sync suits an application integration framework. Streaming events between systems suits a streaming platform. Then check the licence, the language your team writes in, and whether you want to host it yourself.
Are open-source integration platforms free?
The software usually has no licence fee, though some projects use licences that restrict offering them as a service, or keep some features in a paid edition. You still pay for hosting and for the engineering time to build and maintain integrations.
Who supports Centazio?
PicNet maintains Centazio and supports it for clients in production. See the Centazio page for how it works.
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