head to head · open source
seatunnel vs OpenContracts
seatunnel has 9,784 GitHub stars, 2,456 forks, 705 open issues and last shipped 2 days ago. OpenContracts has 1,534 stars, 199 forks, 11 open issues and last shipped 3 days ago. seatunnel leads on adoption by 538% (9,784 vs 1,534 stars). seatunnel is written in Java under Apache-2.0; OpenContracts is written in Python under MIT. seatunnel has attracted 25% as many forks as stars, OpenContracts 13%. seatunnel was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (llm), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
← all 20902 open source comparisons
Side by side
| seatunnel | OpenContracts | |
|---|---|---|
| GitHub stars | ★ 9.8K | ★ 1.5K |
| License | Apache-2.0 | MIT |
| Written in | Java | Python |
| Last push | 2026-11-03 | 2026-11-02 |
| Forks | ⑂ 2.5K | ⑂ 199 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick seatunnel if
- You weight community size — 9.8K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Java
- You value the larger contributor base for long-term maintenance
pick OpenContracts if
- You want the OpenContracts feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and OpenContracts fits your workflow better
About seatunnel
Apache SeaTunnel Overview SeaTunnel is a multimodal, high performance, distributed data integration tool, capable of synchronizing vast amounts of data daily. It's trusted by numerous companies for its efficiency and stability. Why Choose SeaTunnel SeaTunnel addresses common data integration challenges: Diverse Data Sources : Seamlessly integrates with hundreds of evolving data sources. Multimodal Data Integration : Supports the integration of video, images, binary files, structured and unstructured text data. Complex Synchronization Scenarios : Supports various synchronization methods, including real time, CDC…
read the full seatunnel overview →
About OpenContracts
OpenContracts (Demo) Open source document intelligence you can build on. Point OpenContracts at a repository of documents and get a programmable citation graph — human annotation, structured extraction, AI agents, and a built in MCP server, all behind one API. Self hosted, MIT licensed, and built for teams working at scale. Same graph, three surfaces: a GraphQL + REST API for your apps, a Model Context Protocol server for your agents, and a React UI for your team. From documents to a citation graph — in about a minute Create a corpus, drop in your documents, and click Set up . That one click installs the…
read the full OpenContracts overview →
More in Data & Analytics
Related comparisons
More Data Engineering & Integration projects
Compare either of these against the rest of the Data Engineering & Integration field.
Frequently asked questions
Is seatunnel or OpenContracts more popular?
seatunnel has 9,784 GitHub stars and OpenContracts has 1,534. seatunnel has the larger community by that measure.
Are seatunnel and OpenContracts free?
Both are open source. seatunnel is licensed under Apache-2.0 and OpenContracts under MIT. Neither carries a licence fee.
What is the difference between seatunnel and OpenContracts?
seatunnel is written in Java and OpenContracts in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, seatunnel or OpenContracts?
Choose seatunnel if you want the larger community (9,784 stars) or its Apache-2.0 licence terms. Choose OpenContracts if its feature set, stack or MIT licence fits better. Both are self-hostable.