Best Esper Alternatives in 2026
Updated
20 apps from stream processing software ranked against Esper on the same published basis.
- 1Esper vs AFL++
- 2Esper vs Apache Beam
- 3Esper vs Apache NiFi
- 4Esper vs Apache Storm
- 5Esper vs Arroyo
- 6Esper vs Feldera
- 7Esper vs Kafka Streams
- 8Esper vs Timeplus
- 9Esper vs Apache Spark
- 10Esper vs Confluent Cloud
- 12Esper vs Materialize
- 13Esper vs Apache Flink
- 14Esper vs Apache Samza
- 15Esper vs Pathway Live Data Framework
- 16Esper vs Hazelcast Platform
- 17Esper vs RisingWave
- 18Esper vs Siddhi
- 19Esper vs Apache Kafka
- 20Esper vs Quix Streams
- 21Esper vs Amazon Managed Service for Apache Flink
Esper alternatives compared
| # | App | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | AFL++ | 6.6 | Free plan | €1666.67/mo | Android, Linux, Mac, self-hosted, Windows |
| 2 | Apache Beam | 6.6 | Free plan | Free | API, Linux, Mac, self-hosted, Web, Windows |
| 3 | Apache NiFi | 6.6 | Free plan | Free | API, Linux, Mac, self-hosted, Web, Windows |
| 4 | Apache Storm | 6.6 | Free plan | Free | API, Linux, Mac, self-hosted, Web, Windows |
| 5 | Arroyo | 6.6 | Free plan | Free | API, Linux, Mac, self-hosted, Web |
| 6 | Feldera | 6.6 | Free plan | Free | API, Linux, Mac, self-hosted, Web, Windows |
| 7 | Kafka Streams | 6.6 | Free plan | Free | Linux, Mac, self-hosted, Windows |
| 8 | Timeplus | 6.6 | Free plan | $199/mo | API, Linux, Mac, self-hosted, Web, Windows |
| 9 | Apache Spark | 6.5 | Free plan | Free | API, Linux, Mac, self-hosted, Windows |
| 10 | Confluent Cloud | 6.5 | Free plan | $385/mo | API, Linux, Web |
| 12 | Materialize | 6.5 | Free plan | $0.13/mo | API, Linux, self-hosted, Web |
| 13 | Apache Flink | 6.4 | Free plan | Free | API, Linux, self-hosted |
| 14 | Apache Samza | 6.4 | Free plan | Free | API, Linux, self-hosted |
| 15 | Pathway Live Data Framework | 6.4 | Free plan | Free | API, self-hosted |
| 16 | Hazelcast Platform | 5.6 | No | — | API, Linux, Mac, self-hosted, Windows |
| 17 | RisingWave | 5.6 | No | $0.23/mo | API, Linux, Mac, self-hosted, Web |
| 18 | Siddhi | 5.3 | No | — | API, Linux, Mac, self-hosted, Windows |
| 19 | Apache Kafka | 5.2 | No | — | — |
| 20 | Quix Streams | 5.1 | No | — | — |
| 21 | Amazon Managed Service for Apache Flink | 5.0 | No | — | API, Web |
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Questions about Esper alternatives
What is the best alternative to Esper?
AFL++, number 1 in stream processing software with a score of 6.6 out of 10. The others here: Apache Beam, Apache NiFi, Apache Storm and 16 more.
What is the best free alternative to Esper?
AFL++ is the best-ranked alternative with a free plan. 14 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation.