When comparing Stackify vs Rocana, the Slant community recommends Rocana for most people. In the question“What are the best log management, aggregation & monitoring tools?” Rocana is ranked 15th while Stackify is ranked 25th. The most important reason people chose Rocana is:
Beyond simple rules-based alerting, Rocana Ops creates statistical models for each of the metrics you want to track and evaluates as data streams in to provide nearly instantaneous feedback on how your systems are performing. Unique WARN (Weighted Analytic Risk Notifications) Scores indicate components that are trending to the good or bad. Users can create custom metrics, which get evaluated just the same as "out-of-the-box" metrics.
Specs
Ranked in these QuestionsQuestion Ranking
Pros

Pro Easy to install, value out-of-the-box, easy to use
We are using Stackify to monitor everything related to the app including the app performance, server performance, DB, webpages, custom metrics and then when an issue happen, it is great to have the errors and logs all connected together. Way better than any of the log only or error only tools
Pro Great "out-of-the-box" analytics
Beyond simple rules-based alerting, Rocana Ops creates statistical models for each of the metrics you want to track and evaluates as data streams in to provide nearly instantaneous feedback on how your systems are performing. Unique WARN (Weighted Analytic Risk Notifications) Scores indicate components that are trending to the good or bad. Users can create custom metrics, which get evaluated just the same as "out-of-the-box" metrics.
Pro Highly scalable
Collect and analyze multiple TBs of data per day, built on Hadoop components Rocana Ops is a highly-distributed system offering massive scalability using commodity hardware. Rocana has customers collecting 10+ TBs of log data per day.
Rocana One free option provides up to 1TB of daily data volume for free.
Cons
Con No Free Plan
There is no free plan.
Con Minimal
Loggly cannot scale into a full blown infrastructure for analytics. This is simply a tools for parsing log data coming from your apps.
Con Expensive
Appears to be an expensive solution.
Con Doesn't run on a laptop
Well, maybe you can squeeze Rocana Ops on a laptop, but it is designed as a highly-distributed, fault-tolerant system and requires a Hadoop distro as the underlying platform.
