[Codemass: Open Source Experts]


Plethora is a massively-scalable HTTP load testing tool that can be used to measure the concurrency and latency of your web-based services. Plethora can generate thousands of concurrent HTTP requests to multiple URLs in order to help you gauge your site's ability to cope with massive traffic spikes.

We would love to hear back from you! Please send us your comments and suggestions. Patches are always greatly appreciated.


Plethora currently has very low base requirements. A client system merely needs a functional version of libevent in order to operate. For high performance, we recommend using a system that supports epoll() (eg. Linux 2.6.x or later), /dev/poll (eg. modern Solaris) or kqueue() (eg. modern FreeBSD/Darwin).

Plethora has been tested under the following operating systems, and likely works on many others:

Please let us know if you are able to successfully compile and run Plethora on any other platforms.


Plethora is available under the terms of the Apache License, Version 2.0.


Version 0.2.4 (28-Jan-2009)

Version 0.2.3 (28-Nov-2007)

Version 0.2.2 (2-Apr-2007)

Version 0.2.1 (30-Mar-2007)

Version 0.2.0 (21-Mar-2007)

Version 0.0.1 (12-Feb-2007, aka. Version 0.1.0)