Blackfire.io vs Kadira: 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, ...); Kadira: Performance Monitoring for Meteor. See what’s going on with your app with different performance metrics and traces. Kadira tracks all your client and server errors automatically. You can profile your app in production or locally with Kadira and analyze it using an easy-to-use CPU analyzer.

Blackfire.io and Kadira belong to "Performance Monitoring" category of the tech stack.

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, Kadira provides the following key features:

• Performance Metrics and Traces
• Error Tracking
• CPU Profiling

"Deep insights into PHP request cycle" is the top reason why over 4 developers like Blackfire.io, while over 8 developers mention "Best performance monitoring tool for the best framewor" as the leading cause for choosing Kadira.

Kadira is an open source tool with 214 GitHub stars and 88 GitHub forks. Here's a link to Kadira's open source repository on GitHub.