Options to get Ec2 memory matrix other then CloudWatch

In AWS console, unfortunately only using cloudwatch agent we can collect and monitor ec2 memory metrics. Other than this you can montior memory metrics within the ec2 server itself using resource monitoring tools such as ‘atop’.

Not sure what the destinations would be and your goals for monitoring. You have options either on marketplace/third party or custom code based on your choice to gather the matrix and push to destination systems. You may also have options to for historical resource usage for later analysis but as I mentioned depends on your monitoring goals.