New Relic
New Relic is an all-in-one web and mobile application performance management provider for the cloud and the datacenter. It provides 24×7 real user monitoring and code-level diagnostics for production apps deployed on dedicated infrastructures, the cloud, or hybrid environments.
New Relic provides SaaS application performance management services for, PHP (Drupal, WordPress and more), Ruby, Java, and .NET. Its Standard level service is available free to Acquia customers and lets you monitor applications in production, troubleshoot potential performance issues proactively, and tune app for optimal long-term performance. New Relic is used by thousands of organizations worldwide to ensure superior service delivery for their critical web apps. With its easy installation, intuitive user interface, and robust features, New Relic was designed to provide enterprise-class capabilities without enterprise-class headaches.
Pricing: Free Trial, followed by Freemium and paid plans for $24 a month.

AppDynamics

AppDynamics is the easy-to-use Database & Application Performance Management solution that simplifies the management of complex, business-critical apps for Java, .Net, and PHP Environments for:

• Real-Time Business Transaction Monitoring
• Visualizing & Managing your Entire Application
• Detecting Business Impacts and Performance Spikes
• Isolating Bottlenecks in your Application
• Identifying Root Cause with Complete Code diagnostic

CopperEgg
CopperEgg offers server and application performance monitoring that provides simple, smart, and fast insight into hybrid systems, websites, web applications, and services to optimize performance and troubleshoot issues.
Pricing: Free Trial, followed by $70 a month.

Datadog
Datadog provides monitoring services 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.
Pricing: Free Trial, followed by $15 per server per month.

BigPanda
BigPanda helps to respond faster to Ops incidents. It cleans up noisy alerts, provides insights, visualizes correlations in the production stack and enables Ops-aware collaboration, so managers and their teams can make better decisions faster.
Pricing: Free Trial, followed by Freemium offers, then starting at $199 a month.

LogicMonitor
LogicMonitor offers cloud-based performance monitoring, ensuring customer experience and simplified IT Ops. And you can decide to monitor it all co-lo, on-site, and / or cloud.
Pricing: Starting at $99 a month.\

Stackify
Stackify is the only integrated application performance management solution that allows you to monitor applications, servers, and databases. This allows you to interpret synchronized information about bugs and issues across many tools to find a solution more quickly for satisfied customers.
Pricing: Free Trial, followed by $15 a month.

Site 24 x 7
For Site 24 x 7 web infrastructure monitoring service, it’s all in the name. You need to know what’s going on inside your app, but you gotta sleep too. Know right away when your website or web server is down and why.
Pricing: Freemium up to five basic websites from one location; then starting at $200 a year.

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