head to head · open source
seatunnel vs realtime
seatunnel has 9,784 GitHub stars, 2,456 forks, 705 open issues and last shipped 2 days ago. realtime has 7,675 stars, 479 forks, 78 open issues and last shipped yesterday. seatunnel leads on adoption by 27% (9,784 vs 7,675 stars). seatunnel is written in Java under Apache-2.0; realtime is written in Elixir under Apache-2.0. seatunnel has attracted 25% as many forks as stars, realtime 6%. realtime was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (cdc, change-data-capture), 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.
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Side by side
| seatunnel | realtime | |
|---|---|---|
| GitHub stars | ★ 9.8K | ★ 7.7K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Java | Elixir |
| Last push | 2026-11-03 | 2026-11-04 |
| Forks | ⑂ 2.5K | ⑂ 479 |
| 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 realtime if
- You want the realtime feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Elixir
- You evaluated both and realtime 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 realtime
Supabase Realtime Send ephemeral messages, track and synchronize shared state, and listen to Postgres changes all over WebSockets. Examples · Request Features · Report Bugs Status This repository focuses on version 2 but you can still access the previous version's code and Docker image. For the latest Docker images go to The codebase is under heavy development and the documentation is constantly evolving. Give it a try and let us know what you think by creating an issue. Watch releases of this repo to get notified of updates. And give us a star if you like it! Overview What is this? This is a server built with…
read the full realtime overview →
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Frequently asked questions
Is seatunnel or realtime more popular?
seatunnel has 9,784 GitHub stars and realtime has 7,675. seatunnel has the larger community by that measure.
Are seatunnel and realtime free?
Both are open source. seatunnel is licensed under Apache-2.0 and realtime under Apache-2.0. Neither carries a licence fee.
What is the difference between seatunnel and realtime?
seatunnel is written in Java and realtime in Elixir. 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 realtime?
Choose seatunnel if you want the larger community (9,784 stars) or its Apache-2.0 licence terms. Choose realtime if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.