Hazelcast

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

6604 stars · 1892 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Hazelcast is a unified real-time data platform combining distributed stream processing with a fast, in-memory data store. It lets applications ingest, process, query, and act on streaming and batch data with low latency using SQL or a dataflow API.

Use cases

• process streaming data with stateful, fault-tolerant pipelines
• serve low-latency SQL queries over streaming and batch data
• cache contextual and transactional data with read/write-through patterns
• build pub-sub and queue-based messaging between microservices
• enrich event streams with historical data before storing
• deploy machine learning models into real-time data pipelines
• replicate data across regions or data centers

When to choose

• you need low-latency processing and querying of data in motion
• you want a unified platform combining stream processing and a distributed key-value store
• you need exactly-once or at-least-once processing guarantees
• you require distributed coordination, caching, and messaging for microservices
• you want connectors to Kafka, Hadoop, S3, RDBMS, and JMS in one platform

When to avoid

• you only need simple batch analytics without real-time requirements
• your workload is small enough for a single-node database or message broker
• you need a purely relational database with strong ACID transactions across complex schemas
• your team cannot operate a distributed JVM-based cluster

Facets

framework · maturity stable

streaming caching message-queue database etl machine-learning search-engine big-data microservices databases jvm cloud cross-platform in-memory-data-grid stream-processing distributed-computing low-latency data-in-motion sql pub-sub hazelcast-jet real-time data-engineering messaging docker kubernetes

Member repositories

For agents

markdown · JSON · MCP: product_card(name="hazelcast/hazelcast")