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Amazon MSK versus Amazon EventBridge (formerly CloudWatch Events)

25 Nov 2020

Learn how Amazon MSK differs from Amazon EventBridge (formerly CloudWatch Events).

Amazon MSK Amazon EventBridge (formerly CloudWatch Events)
Scaling

30 brokers per cluster; you need add/remove brokers and reassign partitions manually

not disclosed (default soft limit depends on region; e.g., 2400 msg/sec in eu-west-1)

Max. message size

configurable (default 1 MB)

256 KB

Persistence

forever (up to 16384 GiB per broker)

archiving is possible

Replication

Multi-AZ (optional)

Multi-AZ

Order guarantee

within a partition

no

Delivery guarantee

up to the consumer

at least once

Pricing

per broker hour + provisioned storage

per message

Protocols

Kafka protocol

AWS Rest API

AWS Integrations

n/a

Lambda, SQS, SNS, and many more

License

open source (Apache Kafka)

AWS only

Encryption at rest

yes

no

Encryption in transit

yes

yes