Blackfire.io vs Boundary: What are the differences?

Blackfire.io: Blackfire Profiler automatically instruments your code to gather data about consumed server resources like memory, CPU time, and I/O. Blackfire achieves a new level of accuracy by aggregating several profile samples and getting rid of non relevant data. Get even deeper and review the interactions with your entire stack (SQL database engines, cache servers, ...); Boundary: Real-time monitoring for server and applications with beatiful UI. Monitor it all: web servers, load balancers, application back-ends, big data clusters, queues, caching nodes, or databases. Boundary provides insights no matter what stack you use, whether you deploy in the cloud or your data center.

Blackfire.io and Boundary can be categorized as "Performance Monitoring" tools.

Some of the features offered by Blackfire.io are:

• Profile a page at a mouse click thanks to the Blackfire web browser extension
• Browse through the function calls and identify performance bottlenecks thanks to the Blackfire intuitive UI
• Because Blackfire is only triggered when you profile a request, there is no overhead for other requests

On the other hand, Boundary provides the following key features:

• Monitor Servers and Applications in real-time
• Generate Alarms
• Customizable Dashboards

"Deep insights into PHP request cycle" is the top reason why over 4 developers like Blackfire.io, while over 2 developers mention "Great Visualization" as the leading cause for choosing Boundary.