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HTTP regression testing and benchmark utility

Siege is a free and open source regression test and benchmark utility that lets Web designers measure the performance of their code under a heavy load of hits. 'Siege' lets the user hit a server with an adjustable number of concurrent users, thus placing the server "under siege." It can stress test a single URL with a user defined number of simulated users, or it can read many URLs into memory and stress them simultaneously. The program reports the total number of hits recorded, bytes transferred, response time, concurrency, and return status. Most features are configurable with command line options, which also include default values to minimize the complexity of the programs's invocation.


User manual available from


Download version 4.0.2 (stable)
released on 20 May 2016



LicenseVerified byVerified onNotes
License:GPLv2Janet Casey17 January 2001

Leaders and contributors

Jeffrey Fulmer Maintainer
Peter J. Hutnick Contributor

Resources and communication

AudienceResource typeURI
Bug Tracking,Developer,SupportHomepage

Software prerequisites

Required to usePerl
Required to buildautoconf
Source requirementopenssl (to support https protocol)

This entry (in part or in whole) was last reviewed on 16 January 2017.


Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the page “GNU Free Documentation License”.

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