Siege

Name: Siege
Rating: 4.2 (1 reviews)
Author: Sugggest

Siege is an open source load testing and benchmarking utility for web applications. It allows developers to put load on a web server to test application stability and performance under heavy load.

Development Testing

load-testing benchmarking web-application

Features Reviews Alternatives

Siege: Open Source Load Testing and Benchmarking Utility

Test web applications stability and performance under heavy load with Siege, an open source tool for load testing and benchmarking.

What is Siege?

Siege is an open source load testing and benchmarking utility designed specifically to test web applications. It allows developers to simulate a large number of concurrent users accessing a web application to test its performance and stability under heavy load.

Some key features of Siege include:

Ability to simulate hundreds or thousands of concurrent users from a single machine
Flexible configuration of user scenarios and access patterns
Text-based output for statistics like response times, transaction rates, concurrence levels, and response status
Authentication support with GET, POST, Basic Auth, Cookies, etc.
SSL/TLS support
Customizable HTTP header values
Docker support for easier cloud deployments
Scriptable using command files for automated tests

Siege is often used for capacity planning, benchmarking against alternative solutions, analyzing application bottlenecks, and monitoring web application performance over time. It is free and open source, available for Linux, Solaris, and macOS platforms.

Siege Features

Features

Load testing
Stress testing
Benchmarking
HTTP/HTTPS protocol support
Authentication support
Concurrent virtual users
Customizable test scenarios
Command line interface
Detailed performance metrics

Pricing

Open Source

Pros

Open source

Lightweight and easy to use

Cross-platform

Highly customizable

Can simulate thousands of concurrent users

Good for testing app scalability

Cons

Limited reporting compared to commercial tools

Steep learning curve

Only supports web apps, not other services

No GUI

Can underestimate large-scale production loads

Official Links

Official Website
https://github.com/JoeDog/siege

Reviews & Ratings

4.2

★ ★ ★ ★ ★

1 review

Rating Breakdown

Ease of Use

★ ★ ★ ★ ★ 4.0

Features

★ ★ ★ ★ ★ 4.0

Value for Money

★ ★ ★ ★ ★ 5.0

Customer Support

★ ★ ★ ★ ★ 3.0

Overall Experience

★ ★ ★ ★ ★ 4.0

Recent Reviews

olivia_harris40

Mar 09, 2026

★ ★ ★ ★ ★

Simple Yet Powerful Load Testing for Developers

Siege has become my go-to tool for quick performance checks on our web APIs. The command-line interface is straightforward once you learn the basic flags, and it gives me immediate insight into how our services handle concurrent requests. Being open …

View All Reviews (1)

Rating Distribution

The Best Siege Alternatives

Top Development and Testing and other similar apps like Siege

Here are some alternatives to Siege:

locust

Apache JMeter

Apache Benchmark

wrk

Suggest an alternative ❐

Locust

Locust is an open source load testing and performance testing tool written in Python. It is designed to test the performance of web applications by simulating a large number of concurrent users making requests.Some key features of Locust:Simulates thousands of concurrent users making requests to target web appsCan generate various...

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Apache JMeter

Apache JMeter is a versatile open-source tool designed for performance and load testing of applications, allowing developers and testers to assess the scalability and performance of web applications and services. Widely used in the software testing and quality assurance domain, Apache JMeter provides a comprehensive set of features for simulating...

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Apache Benchmark

Apache Benchmark (ab) is an open-source command-line tool for benchmarking the performance of HTTP web servers. It is distributed as part of the Apache HTTP server project and is commonly installed alongside the Apache web server. ab allows users to simulate requests to test the responsiveness, throughput capacity, and scalability...

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Wrk

wrk is an open-source HTTP benchmarking and load testing application. It was created by Will Glozer and is written in C with LuaJIT. wrk is designed to apply a specified user-configurable rate of requests to a target web application to measure performance.Some key features and capabilities of wrk include:Lightweight and...

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