Esper
7.5#3 in stream analytics softwareFree planFree planAPILinuxmacOSSelf-hosted
VisitEsper vs Estuary
What both publish
| Fact | Esper | Estuary |
|---|---|---|
| Documentation depth | EsperTech publishes reference manuals, API JavaDocs, examples, training material and a knowledge base across many releases. | Connector references include prerequisites, configuration properties, YAML examples, supported features and SaaS resource lists. |
| Founded | Esper is documented as created in 2006, with its first public release in early 2006. | 2019 |
| Headquarters | EsperTech lists a mailing address in Wayne, New Jersey, USA. | New York City, New York, United States |
| Integrations | The feature list names CSV, JMS, HTTP, Kafka, database and socket input/output adapters, and JMX metrics exposure. | Estuary advertises more than 200 prebuilt connectors across databases, warehouses, SaaS apps, and cloud platforms, including Snowflake, BigQuery, Kafka, MySQL, and PostgreSQL. |
| Licence | The open-source Esper and NEsper code is released under the GNU GPL version 2. | The Estuary Flow runtime uses Business Source License 1.1, forbids operating a third-party data-processing service, and is scheduled to change to Apache 2.0 on 2029-11-20; the connector repository is dual MIT/Apache 2.0. |
Esper plans
- Esper 9.0.0Free
- Esper Open SourceFree
- Esper Enterprise EditionPriced on request
- EsperHAPriced on request
- Esper supportPriced on request
Estuary plans
- Pay-as-you-go$100 a month
- AnnualPriced on request
- DeveloperFree
- FreeFree
- Cloud PAYG$0.50 a month
- Cloud$0.50 a month
Pick Esper if…
Esper may suit Java or .NET developers building event-processing applications that can embed a runtime in their processes. Its listed use cases include monitoring, financial applications, and sensor networks.
Pick Estuary if…
Estuary suits enterprises that need to manage data cost, latency, and deployment choices across integration workflows. It may also suit teams that want to transform data in motion or configure its storage duration.