Gatling.io is described as 'Gatling is a software designed for load and performance testing of web applications, APIs, and services. The software enables users to simulate user traffic and analyze the behavior and responsiveness of systems under various load conditions' and is a Benchmark tool in the os & utilities category. There are more than 25 alternatives to Gatling.io for a variety of platforms, including Windows, Linux, Web-based, Mac and SaaS apps. The best Gatling.io alternative is Apache JMeter, which is both free and Open Source. Other great apps like Gatling.io are locust, k6, Loadster and wrk.
Apache JMeter is an open source Java application, designed to load test functional behavior and measure performance. Originally designed for testing Web Applications, it has since expanded to other test functions as well.
The latest version (5.6.3) was released in January 2024.
An open source load testing tool written in Python. Locust allows you to define user behaviour with Python code, and swarm your system with millions of simultaneous users.
k6 is an open-source load testing tool. It's used to test the performance of websites, web apps, APIs and micro-services.
Loadster is a full-featured load testing solution for websites, web apps, and web services. It's built for real web apps and effortlessly handles cookies, user sessions, custom headers, dynamic form data and more.
Loader.io is a simple cloud-based load testing service that allows you to stress test your web-apps & apis with thousands of concurrent connections. Made by the team behind SendGrid.
Tsung (formerly IDX-Tsunami) is a distributed load testing tool. It is protocol-independent and can currently be used to stress HTTP, WebDAV, SOAP, PostgreSQL, MySQL, LDAP and Jabber/XMPP servers. It is distributed under the GNU General Public License version 2.
YandexTank is an extensible open source load testing tool for advanced linux users which is especially good as a part of an automated load testing suite.
OctoPerf is an enterprise-grade performance and load testing platform available as SaaS and on-premise, enabling engineering teams to simulate realistic traffic, identify bottlenecks, and validate application scalability at a lower cost than traditional enterprise tools.
Blitz makes load and performance testing of your web site, API, iPhone and Android and Facebook apps a fun sport.
Managed load testing platform built on k6, integrating performance testing into CI/CD pipelines, supporting frontend and backend scenarios, GUI test builder, browser recorder, and JavaScript scripting. Free tier offers virtual user hours, metrics, logs, traces, and observability.
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Easy, Customizable, Scalable, Cloud ready, lot of resources, support and blogs available. Easier to customize than Gatling as it can be done with groovy vs Scala for Gatling.