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Scout APM

scoutapm.com

Rails Monitoring, Django Monitoring, Elixir Phoenix Monitoring, PHP Laravel Monitoring, and more that identifies slow database queries, memory leaks, and more. Scout APM is cheaper, startup-friendly, and easy to use, but doesn't support as wide a range of stacks or features.

OpsGenie

atlassian.com

Opsgenie integrates with over 200 of the best monitoring, ITSM, ChatOps, and collaboration tools. Paired with a flexible rules engine, Opsgenie notifies the right people on-call, enabling them to take rapid action.

New Relic

newrelic.com

New Relic's application monitoring gives you detailed performance metrics for every aspect of your environment. Manage application performance in real-time. New Relic is the market leader, but tends to be on the more expensive end.

Neural Magic

neuralmagic.com

Neural Magic is No-Hardware AI, a pure software engine that delivers GPU-class performance when running deep learning networks on commodity Intel CPUs.