Apache Heron
Apache Heron: A retired open-source engine for teams maintaining Storm-compatible streaming systems. Ranked #25 of 25 in Streaming Analytics Software by our editors (6.9/10); pricing: Open source; best for teams requiring Storm-compatible self-hosted streaming.
At a glance
- Editor score6.9 / 10
- PricingOpen source
- Best forTeams requiring Storm-compatible self-hosted streaming
- Paid fromFree
- DeploymentSelf_hosted
- Facts checked21 Sep 2026
Where it wins
- Apache Storm API compatibility supports existing Storm-oriented applications.
- DAG topologies, routing, metrics, and state management support stream workflows.
- Fault-tolerant processing with pluggable schedulers and process isolation.
Where it doesn't
- The project retired on January 18, 2023.
- The Apache repository is archived and read-only.
- Self-hosted deployment requires teams to manage the deployment environment.
Our verdict on Apache Heron
Apache Heron was an open-source, distributed stream-processing engine developed initially by Twitter and later incubated at the Apache Software Foundation. It was designed for real-time, fault-tolerant processing through topology-based stream applications, making it relevant to teams maintaining self-hosted streaming systems and Apache Storm-compatible workloads. Its deployment model is self-hosted, and its published project status is retired rather than active.
Its strongest technical fit is a streaming architecture that needs structured topologies and configurable execution. Heron supported directed acyclic graph stream topologies, pluggable job-scheduler execution, process-based isolation for Heron instances, stream routing, metrics management, and pluggable state management including ZooKeeper integration. Its ecosystem included Apache Aurora, Apache Hadoop YARN, Apache Mesos, Apache REEF, Apache Kafka, Apache ZooKeeper, Scribe, Apache Storm, and Apache Thrift. Apache Storm API compatibility is particularly relevant for teams preserving Storm-oriented applications or migration paths.
Project status is the decisive limitation for new deployments. The official website redirects to Apache’s retired-project page, which records retirement on January 18, 2023, and the Apache GitHub repository is archived and read-only. That makes Heron most suitable for teams responsible for existing Heron systems or Storm-compatible self-hosted environments where continued maintenance is understood. Teams selecting a current streaming analytics platform for a new implementation should choose an actively maintained product instead. Heron’s open-source model and broad scheduler and integration design remain notable, but they do not offset its retired status for forward-looking adoption.
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Apache Heron pricing
Apache Heron fact sheet
| Free plan | Not verified |
|---|---|
| Paid from | Free |
| Deployment | Self_hosted |
| SQL interface | Not verified |
| Event-time processing | Not verified |
| Stateful processing | Not verified |
| Exactly-once processing | Not verified |
| Watermarks | Not verified |
| Supported languages | Not verified |
| Deployment | Self-hosted |
| Support | Community, Docs |
| Integrations | 9 integrations: Apache Aurora, Apache Hadoop YARN, Apache Mesos, Apache REEF, Apache Kafka, Apache ZooKeeper … |
| Pricing | Open source |
| Website | heron.apache.org |
| Facts checked | 21 Sep 2026 |
Apache Heron integrations
Apache Heron lists 9 integrations on its own site.
- Apache Aurora
- Apache Hadoop YARN
- Apache Mesos
- Apache REEF
- Apache Kafka
- Apache ZooKeeper
- Scribe
- Apache Storm
- Apache Thrift
Alternatives to Apache Heron
- Apache FlinkAn open-source stream processor with broad APIs, deployment choices, and connectors.9.4
- Amazon Managed Service for Apache FlinkA managed AWS service for stateful, scalable Flink applications and real-time analytics.9.3
- Alibaba Cloud Realtime Compute for Apache FlinkA managed Flink service for teams needing streaming depth and enterprise controls.9.2
See all Apache Heron alternatives →
Also Ranked In
Apache Heron is ranked in 2 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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