License

Esper and NEsper are open-source software available under the GNU General Public License (GPL) (GPL v2).

Esper and NEsper including documentation are copyrighted and the copyright is owned by EsperTech Inc., unauthorized reproduction or distribution of this copyrighted work is illegal.

For commercial licensing terms, please contact us for any inquiry.

Trademark

Esper is a trademark of EsperTech Inc..

Use of the Esper trademark or logo for commercial purposes without the prior written consent of EsperTech Inc. may constitute trademark infringement and unfair competition in violation of federal and state laws.

Getting started

• Esper
• Esper Reference manual (HTML)
• Esper Reference manual (single page HTML)
• Esper Reference manual (PDF)
• Esper API javadoc
• EsperIO Reference manual (HTML)
• EsperIO Reference manual (single page HTML)
• EsperIO Reference manual (PDF)
• EsperIO API javadoc