Amazon Managed Service for Apache Flink vs Kafka Streams

Amazon Managed Service for Apache Flink9.3Visit Kafka Streams8.9Visit

Higher score Amazon Managed Service for Apache Flink #1 in Stream Processing Software 9.3/10 Paid ✓ 3 of 3 features Visit AWS

vs

Kafka Streams #5 in Stream Processing Software 8.9/10 Free plan Free plan✓ 2 of 3 features Visit Kafka Streams

• Amazon Managed Service for Apache Flink fits best

  AWS teams wanting managed Flink

• Kafka Streams fits best

  Kafka-native Java and Scala applications

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Side by side

Feature	Amazon Managed Service for Apache Flink 9.3/10 Visit ↗	Kafka Streams 8.9/10 Visit ↗
At a glance
Editor score	9.3	8.9
Ranking	#1 in Stream Processing Software	#5 in Stream Processing Software
Best for	AWS teams wanting managed Flink	Kafka-native Java and Scala applications
Pricing model	Paid	Free
Starting price	$0.11/unit usage-based	Free plan
Free plan	—	✓ (best)
Free trial	—	—
Deployment	Cloud	Self-hosted, Cloud
Platforms	Web	Windows, macOS, Linux
Support	Docs	Community, Docs
Built for	Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features Amazon Managed Service for Apache Flink 3/3 · Kafka Streams 2/3
SQL processing	✓ (best)	—
Stateful processing	✓	✓
Event-time windows	✓	✓
Specs
Deployment model	Cloud	Self-hosted
Supported languages	Java, Scala, Python, SQL	Java, Scala
Source connectors	Not checked yet	Not checked yet
Our review
Pros	Automatic scaling based on throughput and processing complexity Stateful exactly-once processing with checkpoints and durable snapshots Integrations with Kinesis, MSK, S3, DynamoDB, and OpenSearch	Stateful transformations, aggregations, joins, and four window types Exactly-once processing semantics for Kafka-based applications Runs self-hosted or in cloud environments without a separate processing cluster
Cons	No free plan is available Usage starts at $0.11 per KPU-hour Storage and durable backups are billed separately	Core integration scope is centered on Apache Kafka No SQL support for stream-processing workflows Support is limited to community channels and documentation
Our verdict	Amazon Managed Service for Apache Flink is a cloud service for building, deploying, and operating real-time stream-processing applications with Apache Flink. It supports Java, Scala, Python, and SQL, making it suitable for AWS teams… Read the review →	Kafka Streams is an open-source client library for building real-time applications and microservices whose input and output data are stored in Apache Kafka clusters. It is designed for developers and teams creating event-driven services,… Read the review →

Strengths and trade-offs

• Amazon Managed Service for Apache Flink — where it wins

  • Automatic scaling based on throughput and processing complexity
  • Stateful exactly-once processing with checkpoints and durable snapshots
  • Integrations with Kinesis, MSK, S3, DynamoDB, and OpenSearch

  Where it doesn't

  • No free plan is available
  • Usage starts at $0.11 per KPU-hour
  • Storage and durable backups are billed separately

• Kafka Streams — where it wins

  • Stateful transformations, aggregations, joins, and four window types
  • Exactly-once processing semantics for Kafka-based applications
  • Runs self-hosted or in cloud environments without a separate processing cluster

  Where it doesn't

  • Core integration scope is centered on Apache Kafka
  • No SQL support for stream-processing workflows
  • Support is limited to community channels and documentation

• Amazon Managed Service for Apache Flink9.3/10 · Paid

  A managed Flink service for AWS teams building stateful real-time data pipelines.

  Visit AWSFull verdict →
• Kafka Streams8.9/10 · Free plan

  A free, Kafka-native stream-processing library for Java and Scala applications.

  Visit Kafka StreamsFull verdict →