If your priority is high throughput + minimal broker operations, I’d shortlist these managed SaaS options:
| Platform | Best fit | Operational effort | Kafka compatibility | Throughput / scaling |
|---|
| confluent.io | Broad enterprise event-streaming platform | Very low | Excellent | Serverless autoscaling |
| redpanda.com | Performance-sensitive Kafka workloads | Very low | Excellent | Strong throughput, dedicated/BYOC options |
| aws.amazon.com | AWS-native teams wanting Kafka | Very low | Native Apache Kafka | Automatically provisions/scales capacity |
| upstash.com | Lightweight/serverless applications | Extremely low | Kafka-compatible | Pay-per-request/serverless model |
My take
1. Confluent Cloud — best overall
Confluent is probably the safest choice if streaming is becoming a core platform rather than just a message queue. Its fully managed/serverless Kafka offering handles provisioning and scaling, while the broader platform adds Schema Registry, connectors, governance, and stream processing.
Choose it when you expect requirements such as CDC, multiple sinks, schema governance, Flink/stream processing, or multi-cloud to emerge.
2. Redpanda Cloud — best for raw performance + simplicity
Redpanda is particularly attractive if your team wants Kafka API compatibility without the operational complexity traditionally associated with Kafka. Its Cloud service manages upgrades, patching, balancing, monitoring, and recovery. Serverless is designed for minimal configuration; Dedicated and BYOC provide substantially more throughput for demanding production workloads.
Current documented Redpanda Cloud limits reach 400 MB/s write / 800 MB/s read for Dedicated and 2 GB/s write / 4 GB/s read for BYOC, making it a strong candidate for genuinely high-throughput workloads.
3. Amazon MSK Serverless — best if you're already deep in AWS
MSK Serverless automatically provisions and scales Kafka capacity and partitions, so you don't have to right-size or manage brokers. It remains fully compatible with Apache Kafka clients.
The tradeoff is that the experience is more AWS-centric than Confluent's or Redpanda's broader streaming platforms.
4. Upstash Kafka — best for simple, bursty workloads
Upstash pioneered a serverless/pay-per-request Kafka model where the provider handles availability, maintenance, scaling, and upgrades. Upstash It's compelling when you want to eliminate infrastructure entirely, although I'd generally favor Confluent or Redpanda for large, sustained, mission-critical throughput.
What I'd choose
- Need a full enterprise streaming platform: Confluent Cloud
- Need very high throughput with minimal operational complexity: Redpanda Cloud
- Already standardized on AWS: MSK Serverless
- Small teams / highly variable traffic / serverless-first apps: Upstash
- Need Kafka compatibility but want to get away from JVM/Kafka operational complexity: Redpanda Cloud is especially compelling.
For your specific wording—“high-throughput” and “minimal configuration”—I'd start a bake-off between Redpanda Cloud and Confluent Cloud, rather than evaluating generic queues such as SQS/Pub/Sub. The important benchmark dimensions would be sustained ingress/egress, p99 latency, partition scaling, retention cost, and connector/Schema Registry requirements.
1. Confluent Cloud — best overall
Confluent is probably the safest choice if streaming is becoming a core platform rather than just a message queue. Its fully managed/serverless Kafka offering handles provisioning and scaling, while the broader platform adds Schema Registry, connectors, governance, and stream processing.
Choose it when you expect requirements such as CDC, multiple sinks, schema governance, Flink/stream processing, or multi-cloud to emerge.
2. Redpanda Cloud — best for raw performance + simplicity
Redpanda is particularly attractive if your team wants Kafka API compatibility without the operational complexity traditionally associated with Kafka. Its Cloud service manages upgrades, patching, balancing, monitoring, and recovery. Serverless is designed for minimal configuration; Dedicated and BYOC provide substantially more throughput for demanding production workloads.
Current documented Redpanda Cloud limits reach 400 MB/s write / 800 MB/s read for Dedicated and 2 GB/s write / 4 GB/s read for BYOC, making it a strong candidate for genuinely high-throughput workloads.
3. Amazon MSK Serverless — best if you're already deep in AWS
MSK Serverless automatically provisions and scales Kafka capacity and partitions, so you don't have to right-size or manage brokers. It remains fully compatible with Apache Kafka clients.
The tradeoff is that the experience is more AWS-centric than Confluent's or Redpanda's broader streaming platforms.
4. Upstash Kafka — best for simple, bursty workloads