Pricing
Esper pricing
As espertech.com lists them, read 3 Oct 2026. The maker's own page has the final word.
| Plan | Billed and limits | Price |
|---|---|---|
| Esper 9.0.0 | GNU GPL (GPL v2) | Free |
| Esper Open Source | GPLv2 license · Java/JVM and .NET/NEsper · software supplied as-is | Free |
| Esper support | per year and per instance or per seat · Production support: Bronze, Silver, Gold · Development support: Developer Seat | On request |
| Esper Enterprise Edition | closed-source commercial product · horizontal scaling · REST services · GUI · JDBC/JMX · commercial support | On request |
| EsperHA | high-availability add-on · state resilience · fast recovery · enterprise support | On request |
From espertech.com, github.com, espertech.com, espertech.com, static.espertech.com.