Best Sitespeed Alternatives & Competitors in 2025

New Relic is a Software Analytics company that makes sense of billions of metrics across millions of apps. We help the people who build modern software understand the stories their data is trying to tell them.

Dynatrace Load lets you test the performance of web and mobile applications with the realism of load generation from the cloud.

NinjaOne (Formerly NinjaRMM) provides remote monitoring and management software that combines powerful functionality with a fast, modern UI. Easily remediate IT issues, automate common tasks, and support end-users with powerful IT management tools.

Try for free paid Free Trial

Blackfire empowers all PHP developers and IT/Ops to continuously verify and improve their app’s performance, throughout its lifecycle, by getting the right information at the right moment.

Data visualization & Monitoring with support for Graphite, InfluxDB, Prometheus, Elasticsearch and many more databases

Open Source

Stagemonitor is an open-source application performance monitoring tool that helps you quickly measure your Java EE applications deeply.

XHProf is a function-level hierarchical profiler for PHP and has a simple HTML based user interface.

Open Source

WebLOAD - The most flexible and cost effective software for enterprise load, stress and performance testing, integrated with DevOps processes. Click for details

JavaMelody is a powerful full tool that is used to monitor Java and Java EE application servers in production and QA environment.

Open Source

See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.

freemium $15.0 / Monthly (per host)

Apache SkyWalking is an open-source application performance monitoring solution that provides tracking, metrics analysis, service mesh observability, alarm, and visualization.

Open Source

Apache JMeter™.

UbikLoadPack provides plugins for Apache JMeter to load test Video Streaming, GWT Applications, Java Serialization based products and Flex.

Run a free website speed test from multiple locations around the globe using real browsers...