AWS Elastic Load Balancing (ELB) vs Elastic Apache Mesos: What are the differences?

What is AWS Elastic Load Balancing (ELB)? Automatically distribute your incoming application traffic across multiple Amazon EC2 instances. With Elastic Load Balancing, you can add and remove EC2 instances as your needs change without disrupting the overall flow of information. If one EC2 instance fails, Elastic Load Balancing automatically reroutes the traffic to the remaining running EC2 instances. If the failed EC2 instance is restored, Elastic Load Balancing restores the traffic to that instance. Elastic Load Balancing offers clients a single point of contact, and it can also serve as the first line of defense against attacks on your network. You can offload the work of encryption and decryption to Elastic Load Balancing, so your servers can focus on their main task.

What is Elastic Apache Mesos? Automated creation of Apache Mesos clusters on Amazon EC2. Elastic Apache Mesos is a web service that automates the creation of Apache Mesos clusters on Amazon Elastic Compute Cloud (EC2). It provisions EC2 instances, installs dependencies including Apache ZooKeeper and HDFS, and delivers you a cluster with all the services running.

AWS Elastic Load Balancing (ELB) and Elastic Apache Mesos are primarily classified as "Load Balancer / Reverse Proxy" and "Cluster Management" tools respectively.