AWS SNS
SNS is a simple, distributed, cloud-native messaging service.
Amazon Kinesis Data Streams
Kinesis Data Streams is a scalable and durable realtime data streaming service.
Apache Kafka
Apache Kafka is a popular open-source event-streaming platform.
Google Cloud Pub/Sub
Google Cloud Pub/Sub is a pub/sub-based messaging service.
IronMQ
IronMQ is a message queuing service for distributed cloud applications.