# Apache Storm vs Hazelcast

| Attribute | Apache Storm | Hazelcast |
|---|---|---|
| **Vioscale score** | 55.2 (28% (low)) | 48.5 (56% (medium)) |
| activity.commits_last_30d | 78 | 71 |
| adoption.dependent_repos | 1,756 | 10,433 |
| adoption.github_stars | 6,698 | 6,604 |
| adoption.package_downloads_weekly | - | 4,717 |
| deployment.options | `{"self_hosted":true}` | `{"cloud":true,"on_prem":true,"self_hosted":true}` |
| description.long | An open-source system designed to handle continuous streams of information quickly and reliably, without stopping, with built-in protections against data loss. | Hazelcast is a distributed data platform that provides real-time processing and continuous intelligence capabilities. It supports clustering and integrates with various frameworks and clients. |
| features.capabilities | - | `{"clustering":"replicated","deployment":"self_hosted","open_source":false,"storage_tier":"in_memory","latency_class":"sub-second","wire_protocol":"custom","stateful_processing":true}` |
| integrations.count | 2 | 1 |
| integrations.list | `[{"name":"Hadoop"},{"name":"Kafka"}]` | `[{"name":"Spring Integration"},{"name":"MongoDB"}]` |
| language.primary | Java | Java |
| license.spdx | Apache-2.0 | Apache-2.0 |
| market.availability | `{"hqCountry":"US","primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | - |
| platform.support | `{"cli":true}` | `{"cli":true}` |
| pricing | `{"type":"open_source","summary":"Free and open source","freeTier":true,"sourceUrl":"https://storm.apache.org","retrievedAt":"2026-08-19T22:48:57.139Z"}` | `{"type":"quote","sourceUrl":"https://hazelcast.com","retrievedAt":"2026-08-03T21:11:26.502Z"}` |
| pricing.free_tier | yes | - |
| pricing.model | open_source | commercial |
| pricing.price_level | free | unknown |
| pricing.transparent | yes | no |
| release.cadence_days | 26 | 15 |
| release.history | `[{"url":"https://github.com/apache/storm/releases/tag/v3.0.0","date":"2026-07-22T22:27:16Z","type":"stable","version":"v3.0.0"},{"url":"https://github.com/apache/storm/releases/tag/v2.8.9","date":"2026-07-22T22:24:51Z","type":"stable","version":"v2.8.9"},{"url":"https://github.com/apache/storm/releases/tag/v2.8.8","date":"2026-05-18T22:03:07Z","type":"stable","version":"v2.8.8"},{"url":"https://github.com/apache/storm/releases/tag/v2.8.7","date":"2026-04-19T17:26:04Z","type":"stable","version":"v2.8.7"},{"url":"https://github.com/apache/storm/releases/tag/v2.8.6","date":"2026-04-07T18:11:58Z","type":"stable","version":"v2.8.6"},{"url":"https://github.com/apache/storm/releases/tag/v2.8.5","date":"2026-03-25T00:05:25Z","type":"stable","version":"v2.8.5"},{"url":"https://github.com/apache/storm/releases/tag/v2.8.4","date":"2026-03-02T15:29:20Z","type":"stable","version":"v2.8.4"},{"url":"https://github.com/apache/storm/releases/tag/v2.8.3","date":"2025-11-02T17:42:34Z","type":"stable","version":"v2.8.3"},{"url":"https://github.com/apache/storm/releases/tag/v2.8.2","date":"2025-08-03T20:48:08Z","type":"stable","version":"v2.8.2"},{"url":"https://github.com/apache/storm/releases/tag/v2.8.1","date":"2025-06-03T00:05:21Z","type":"stable","version":"v2.8.1"},{"url":"https://github.com/apache/storm/releases/tag/v2.8.0","date":"2025-01-24T12:36:59Z","type":"stable","version":"v2.8.0"},{"url":"https://github.com/apache/storm/releases/tag/v2.7.1","date":"2025-01-09T14:24:47Z","type":"stable","version":"v2.7.1"},{"url":"https://github.com/apache/storm/releases/tag/v2.7.0","date":"2025-01-09T14:24:29Z","type":"stable","version":"v2.7.0"}]` | `[{"url":"https://github.com/hazelcast/hazelcast/releases/tag/v5.7.0","date":"2026-05-13T10:46:12Z","type":"stable","version":"v5.7.0"},{"url":"https://github.com/hazelcast/hazelcast/releases/tag/v5.6.0","date":"2025-10-15T14:47:06Z","type":"stable","version":"v5.6.0"},{"url":"https://github.com/hazelcast/hazelcast/releases/tag/v5.5.0","date":"2024-07-26T17:03:03Z","type":"stable","version":"v5.5.0"},{"url":"https://github.com/hazelcast/hazelcast/releases/tag/v5.3.8","date":"2024-07-17T14:13:54Z","type":"stable","version":"v5.3.8"},{"url":"https://github.com/hazelcast/hazelcast/releases/tag/v5.4.0","date":"2024-04-15T17:55:57Z","type":"stable","version":"v5.4.0"},{"url":"https://github.com/hazelcast/hazelcast/releases/tag/v5.3.7","date":"2024-04-03T10:23:29Z","type":"stable","version":"v5.3.7"},{"url":"https://github.com/hazelcast/hazelcast/releases/tag/v5.2.5","date":"2024-02-26T14:47:57Z","type":"stable","version":"v5.2.5"},{"url":"https://github.com/hazelcast/hazelcast/releases/tag/v5.3.6","date":"2023-11-09T14:00:06Z","type":"stable","version":"v5.3.6"},{"url":"https://github.com/hazelcast/hazelcast/releases/tag/v5.3.5","date":"2023-10-24T14:59:38Z","type":"stable","version":"v5.3.5"},{"url":"https://github.com/hazelcast/hazelcast/releases/tag/v5.3.2","date":"2023-08-21T15:41:18Z","type":"stable","version":"v5.3.2"},{"url":"https://github.com/hazelcast/hazelcast/releases/tag/v5.0.5","date":"2023-06-28T13:47:26Z","type":"stable","version":"v5.0.5"},{"url":"https://github.com/hazelcast/hazelcast/releases/tag/v5.1.7","date":"2023-06-19T14:02:07Z","type":"stable","version":"v5.1.7"},{"url":"https://github.com/hazelcast/hazelcast/releases/tag/v5.2.4","date":"2023-06-13T12:40:26Z","type":"stable","version":"v5.2.4"},{"url":"https://github.com/hazelcast/hazelcast/releases/tag/v5.3.1","date":"2023-06-09T09:24:01Z","type":"stable","version":"v5.3.1"},{"url":"https://github.com/hazelcast/hazelcast/releases/tag/v4.2.8","date":"2023-05-29T09:56:41Z","type":"stable","version":"v4.2.8"},{"url":"https://github.com/hazelcast/hazelcast/releases/tag/v5.3.0","date":"2023-05-19T06:32:29Z","type":"stable","version":"v5.3.0"},{"url":"https://github.com/hazelcast/hazelcast/releases/tag/v5.1.6","date":"2023-05-10T10:55:54Z","type":"stable","version":"v5.1.6"},{"url":"https://github.com/hazelcast/hazelcast/releases/tag/v5.3.0-BETA-2","date":"2023-04-12T10:58:26Z","type":"stable","version":"v5.3.0-BETA-2"},{"url":"https://github.com/hazelcast/hazelcast/releases/tag/v5.2.3","date":"2023-03-23T13:28:16Z","type":"stable","version":"v5.2.3"},{"url":"https://github.com/hazelcast/hazelcast/releases/tag/v5.3.0-BETA-1","date":"2023-03-17T06:49:49Z","type":"stable","version":"v5.3.0-BETA-1"}]` |
| reliability.status_page | - | yes |
| security.gdpr | - | yes |
| security.scorecard | 6.8 | 4.2 |
| security.vulnerabilities | `{"count":6,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=org.apache.storm%3Astorm-core&per_page=100","last_12m":0,"max_severity":"HIGH"}` | `{"count":8,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=com.hazelcast%3Ahazelcast&per_page=100","last_12m":0,"max_severity":"CRITICAL"}` |

## Capabilities (Streaming Analytics)

| Capability | Apache Storm | Hazelcast |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Processing model | - | - |
| Delivery guarantee | - | - |
| Streaming sql | - | - |
| Event time watermarks | - | - |
| Stateful processing | - | ✓ |
| Cdc support | - | - |
| Deployment model | - | - |
| Autoscaling | - | - |
| Connector breadth | - | - |
| Latency class | - | Sub second |
| Open source | - | ✗ |
| SOC2 | - | - |
| Pricing model | - | - |

*Source: Vioscale. Generated 2026-09-01T14:33:46.179Z. "-" = undocumented, not absent.*