What managed services should I look at for continuous data ingestion and routing between my applications and storage?

We ask the same underlying question in different ways.

• What managed services should I look at for continuous data ingestion and routing between my applications and storage?
• I'm looking for a managed SaaS for event streaming that handles high throughput with minimal configuration. What platforms should we consider?
• Can you recommend managed platforms for streaming data continuously between my storage targets and applications?