New Relic is a monitoring application that allows you to pinpoint and solve performance issues in your Ruby, Java, .NET, PHP and Python apps with real user, application, and server monitoring.
Free accounts can ping a website every 1 minute from multiple locations across the globe and send email alerts.
There are other free New Relic alternatives that provide a broader feature set without requiring payment. Of course, if you need to be able to audit the code of whatever monitoring solution you use for your business, self-hosted open source alternatives to New Relic are also available.
Infrastructure-wide health monitoring & performance troubleshooting in one place. Collaborate in the same place as relevant data from your systems and applications, reducing mean time to acknowledge (MTTA), & mean time to resolution. (MTTR).
Netdata vs New Relic opinions
pros, cons and recent comments
No feature parity, the power of newrelic is in its agents that profile the internals of PHP/Ruby/Python etc.
Prometheus is an open-source systems monitoring and alerting toolkit originally built at SoundCloud. Since its inception in 2012, many companies and organizations have adopted Prometheus, and the project has a very active developer and user community.
Datadog is a monitoring service for IT, Dev & Ops teams who write and run applications at scale, and want to turn the massive amounts of data produced by their apps, tools and services into a unified view of IT infrastructure. 120+ Integrations!.
Some users think Datadog is a great alternative to New Relic, some don't.
GlitchTip's open source platform makes monitoring software easy. Track errors, monitor performance, check site uptime all in one place. Compatible with Sentry client SDK but easier to run and entirely open source.
Loki is a horizontally-scalable, highly-available, multi-tenant log aggregation system inspired by Prometheus. It is designed to be very cost effective and easy to operate. It does not index the contents of the logs, but rather a set of labels for each log stream.
SPX, which stands for Simple Profiling eXtension, is just another profiling extension for PHP.
It differentiates itself from other similar extensions as being: totally free and confined to your infrastructure (i.e. no data leaks to a SaaS).