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Download NEsper

NEsper can be downloaded as a zip-file:

Download License
NEsper 5.5.1 (zip) NEsper-5.5.1.zip GNU GPL version 2

Previous Releases

Earlier versions of NEsper can be downloaded from here.

Prerequisite For Clients

.NET Framework minimum of 3.5

Installation Steps

Installation from Zip File

  • Select installation directory
  • Unzip contents into installation directory


  • This is a CEP component for inclusion into your own application process and does not include a server executable to run.