Free open source alternative app list of Stackify :

Node.js Performance Platform

The Node.js Performance Platform is a holistic solution that provides performance monitoring, security alerts, troubleshooting, and performance optimization services for medium - and large-sized Node.js applications. With a deep understanding of the Node.js kernel, we provide a comprehensive tool chain and services to help customers proactively and quickly find and locate online issues.

FreeWindowsmacOSLinux

Prometheus

An open-source monitoring system with a dimensional data model, flexible query language, efficient time series database and modern alerting approach.

FreeWindowsmacOSLinux

UptimeRobot

Start monitoring in 30 seconds. Use advanced SSL, keyword and cron monitoring. Get notified by email, SMS, Slack and more. Get 50 monitors for FREE!

FreemiumWindowsmacOSLinux

Datadog

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.

FreemiumWindowsmacOSLinux

Omlet

Omlet · Measure the Success of Your Components. Component analytics and insights for React.

FreemiumWindowsmacOSLinux

Montastic

Monitoring and status pages to keep people informed during incidents.

FreemiumWindowsmacOSLinux

Better Stack

Better Stack lets you see inside any stack, debug any issue, and resolve any incident.

FreemiumWindowsmacOSLinux

Express status monitor

Simple, self-hosted module based on Socket.io and Chart.js to report realtime server metrics for Express-based node servers.

FreeWindowsmacOSLinux

Sentry

Code breaks, fix it faster Application monitoring software considered "not bad" by 4 million developers. Self-hosted and cloud-based application performance monitoring & error tracking that helps software teams see clearer, solve quicker, & learn continuously.

FreemiumWindowsmacOSLinux

Clinic.js

Tools to help diagnose and pinpoint Node.js performance issues. Clinic.js is a suite of tools to help diagnose and pinpoint your Node.js performance issues.

FreeWindowsmacOSLinux

New Relic

All-in-one observability. Data for engineers to monitor, debug, and improve their entire stack. Sign up for free, no credit card required with New Relic the all-in-one observability platform for engineers to monitor, debug, and improve their entire stack.

FreemiumWindowsmacOSLinuxAndroidiOS

PM2

ADVANCED, PRODUCTION PROCESS MANAGER FOR NODE.JS PM2 is a daemon process manager that will help you manage and keep your application online 24/7 Advanced process manager for production Node.js applications. Load balancer, logs facility, startup script, micro service management, at a glance.

FreeWindowsmacOSLinux

Nagios XI

Nagios XI An extensible, enterprise-level infrastructure monitoring solution with time-saving, easy-to-use features. Monitor, troubleshoot, and proactively alert on your infrastructure in a streamlined environment.

FreemiumWindowsmacOSLinux

Others are looking for free open source alternatives of following apps:

Acorn 7

Acorn 7 is a Mac image editor for editing photos and creating graphics.

Adobe Premiere Pro

Adobe Premiere Pro is a professional video editing software for film, TV, and web.

AI & Machine Learning

Free open-source AI & machine learning tools.

Ad Blocker

Ad Blocker is a browser tool that removes intrusive ads and pop-ups from web pages.

AdGuard

AdGuard is a cross-platform ad blocker that filters web content and protects privacy.

AdGuard DNS

AdGuard DNS is a DNS-based service that blocks ads, trackers, and malicious websites.