Pricing · 2026
Esper pricing
5 plans on the record · a free plan
Every plan
Esper Open Source
Free
GPLv2 license · Java/JVM and .NET/NEsper · software supplied as-is
Read 15 Oct 2026 · github.com
Esper 9.0.0
Free
GNU GPL (GPL v2)
Read 3 Oct 2026 · espertech.com
Esper Enterprise Edition
Priced on request
closed-source commercial product · horizontal scaling · REST services · GUI · JDBC/JMX · commercial support
Read 15 Oct 2026 · espertech.com
EsperHA
Priced on request
high-availability add-on · state resilience · fast recovery · enterprise support
Read 15 Oct 2026 · static.espertech.com
Esper support
Priced on request
per year and per instance or per seat
Production support: Bronze, Silver, Gold · Development support: Developer Seat
Read 3 Oct 2026 · espertech.com