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Head-to-head · Event Streaming Platforms

Amazon Kinesis Data Streams vs Apache Pulsar

  • Updated Sep 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score Amazon Kinesis Data Streams #5 in Event Streaming Platforms 7.4/10 From $0.03 ✓ 2 of 2 features Visit AWS
Apache Pulsar #7 in Event Streaming Platforms 6.9/10 Free plan Free plan✓ 2 of 2 features Visit Apache Pulsar

Amazon Kinesis Data Streams leads on 0 checks, Apache Pulsar on 1, and 2 are even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreAmazon Kinesis Data Streams · 7.4/10
  • Free planonly Apache Pulsar

Amazon Kinesis Data Streams scores higher on our rubric for event streaming platforms: 7.4 against 6.9 out of 10; our editors rank them #5 and #7.

Apache Pulsar offers free plan; Amazon Kinesis Data Streams doesn't. On deployment model, Apache Pulsar gives you Self-hosted where Amazon Kinesis Data Streams offers Cloud. On delivery guarantee, Apache Pulsar gives you Both where Amazon Kinesis Data Streams offers At-least-once.

Amazon Kinesis Data Streams is the better fit for AWS teams ingesting high-volume event streams. Apache Pulsar is the better fit for teams needing open-source multi-tenant streaming.

  • Amazon Kinesis Data Streams fits best

    AWS teams ingesting high-volume event streams

  • Apache Pulsar fits best

    Teams needing open-source multi-tenant streaming

Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. How we rank.

Side by side

Feature Amazon Kinesis Data Streams 7.4/10 Visit ↗ Apache Pulsar 6.9/10 Visit ↗
At a glance
Editor score 7.4 6.9
Ranking #5 in Event Streaming Platforms #7 in Event Streaming Platforms
Best for AWS teams ingesting high-volume event streams Teams needing open-source multi-tenant streaming
Pricing model Paid Free
Starting price Not published Not published
Free plan — ✓ (best)
Free trial — —
Deployment Cloud Self-hosted
Platforms Web Windows, macOS, Linux
Support Docs Community, Docs
Integrations 12 integrations 3 integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Amazon Kinesis Data Streams 2/2 · Apache Pulsar 2/2
Stream processing ✓ ✓
Schema registry ✓ ✓
Specs
Deployment model Cloud Self-hosted
Maximum retention 365 days Not published
Delivery guarantee At-least-once Both
Connectors listed Not published Not published
Supported client languages Go, Java, JavaScript, .NET, PHP, Python, Ruby, C++, Kotlin, Rust, SAP ABAP, Swift Java, Go, Python, C++, C#/.NET, Node.js, WebSocket
Our review
Pros
  • Real-time ingestion with retention options up to 365 days
  • Extensive AWS integrations, including Lambda, S3, and Flink
  • Automatic shard management in on-demand mode
  • Persistent storage, transactions, schemas, and multiple subscription types
  • Multi-tenancy, access control, and geo-replication across clusters
  • Clients, connectors, and deployment options across major environments
Cons
  • No free plan; pricing varies by AWS Region
  • At-least-once processing semantics can require duplicate handling
  • Enhanced retention and other capabilities can add separate charges
  • Self-hosted deployment places infrastructure management on the team
  • Its broad feature set may exceed the needs of simple streaming projects
  • AI features are not included
Our verdict

Amazon Kinesis Data Streams is a fully managed, serverless service for ingesting, storing, and consuming streaming data in real time. It is suited to AWS teams building event-driven applications, clickstream or log analytics, dashboards,…

Read the review →

Apache Pulsar is an open-source messaging and streaming platform for server-to-server communication and event-driven applications. It is designed for organizations ranging from small companies to large enterprises, particularly teams that…

Read the review →
  1. Amazon Kinesis Data StreamsEvent Streaming Platforms 7.4From $0.03
  2. Apache PulsarEvent Streaming Platforms 6.9Free plan

Strengths and trade-offs

  • Amazon Kinesis Data Streams — where it wins

    • Real-time ingestion with retention options up to 365 days
    • Extensive AWS integrations, including Lambda, S3, and Flink
    • Automatic shard management in on-demand mode

    Where it doesn't

    • No free plan; pricing varies by AWS Region
    • At-least-once processing semantics can require duplicate handling
    • Enhanced retention and other capabilities can add separate charges

  • Apache Pulsar — where it wins

    • Persistent storage, transactions, schemas, and multiple subscription types
    • Multi-tenancy, access control, and geo-replication across clusters
    • Clients, connectors, and deployment options across major environments

    Where it doesn't

    • Self-hosted deployment places infrastructure management on the team
    • Its broad feature set may exceed the needs of simple streaming projects
    • AI features are not included
  • Amazon Kinesis Data Streams7.4/10 · From $0.03

    A flexible AWS-native stream service with usage pricing and at-least-once delivery.

    Visit AWSFull verdict →
  • Apache Pulsar6.9/10 · Free plan

    Open-source streaming with multi-tenancy, replication, storage, and processing built in.

    Visit Apache PulsarFull verdict →

More comparisons

All event streaming platforms comparisons → · Full ranking →

Guides on event streaming platforms

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

Last updated · How we research and update