Apache Spark is a unified analytics engine for big data processing, with built-in modules for streaming, SQL, machine learning, and graph processing.
Open-source
Best Arroyo Alternatives ranked by AI · updated Aug 2026
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Arroyo is an open-source stream-processing engine that lets teams build real-time pipelines with SQL and deploy them through a cloud-native runtime. It targets event processing, streaming analytics, and operational data applications.
Top 6 Arroyo alternatives
Apache Flink is a powerful and versatile open-source stream processing framework with powerful event-time processing capabilities.
Materialize is a streaming database that maintains incrementally updated SQL views over changing data. It is designed for developers building real-time applications,...
Pros
- Strong incremental-view model for continuously updated results
- PostgreSQL-compatible SQL is more familiar than many streaming APIs
- Good fit for serving low-latency operational data to applications
Cons
- Requires more stream-processing design knowledge than Timeplus dashboards
- Less suited to ad hoc historical analytics than ClickHouse
- Cloud resource costs can rise with large or complex views
Free tier; paid plans from $75/mo
Pathway is an open-source Python framework for building real-time data pipelines, stream processing applications, and retrieval-augmented generation systems. It is aimed at...
Pros
- Python-first API is more accessible than many JVM-based streaming platforms
- Supports batch and streaming data with a unified incremental-processing model
- Useful built-in connectors and transformations for live AI and RAG pipelines
Cons
- Smaller ecosystem and community than Apache Flink or Apache Spark
- Fewer mature enterprise integrations and operational tools than established platforms
- Requires learning Pathway's execution model and connector configuration
Free and open source; enterprise pricing custom
5
RisingWave
RisingWave
RisingWave is a distributed SQL streaming database that incrementally materializes views from event streams. It targets data engineers building real-time dashboards, data...
Pros
- Open-source core provides a strong alternative to managed-only platforms
- Materialized views reduce repeated computation for streaming queries
- PostgreSQL-compatible interface lowers adoption friction
Cons
- Smaller ecosystem and operational track record than Flink
- Connector coverage is narrower than established data platforms
- SQL behavior and streaming semantics require platform-specific learning
Free and open source; cloud plans available
6
Bytewax
Bytewax
Bytewax is an open-source Python framework for stateful stream processing and event-driven dataflows. It is intended for Python developers building real-time feature...
Pros
- Python-native API provides a comparable developer experience to Pathway
- Supports stateful operators and windowing for real-time applications
- Lightweight deployment model is simpler than a large JVM streaming cluster
Cons
- Smaller connector ecosystem and community than Pathway or Flink
- Less comprehensive built-in data integration than larger platforms
- Large-scale operational patterns are less mature than Flink's
Free and open source; enterprise pricing custom
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