Apache Kafka vs Apache Cassandra

Apache Kafka9.4Visit Apache Cassandra9.1Visit

Higher score Apache Kafka #1 in Distributed Systems 9.4/10 Open source ✓ 0 of 1 features Visit Apache Kafka

vs

Apache Cassandra #3 in Distributed Systems 9.1/10 Open source ✓ 0 of 1 features Try Apache Cassandra

• Apache Kafka fits best

  Self-hosted event streaming and data pipelines

• Apache Cassandra fits best

  Teams running large-scale distributed wide-column databases

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature	Apache Kafka 9.4/10 Visit ↗	Apache Cassandra 9.1/10 Visit ↗
At a glance
Editor score	9.4	9.1
Ranking	#1 in Distributed Systems	#3 in Distributed Systems
Best for	Self-hosted event streaming and data pipelines	Teams running large-scale distributed wide-column databases
Pricing model	Free	Free
Starting price	Open source	Open source
Free plan	Not checked yet	Not checked yet
Free trial	—	—
Deployment	Self-hosted	Self-hosted, Desktop
Support	Community, Docs	Community, Docs
Built for	Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features Apache Kafka 0/1 · Apache Cassandra 0/1
Managed service	Not checked yet	Not checked yet
Specs
Deployment model	Not checked yet	Self_hosted
Primary function	Not checked yet	Not checked yet
Supported protocols	Not checked yet	Not checked yet
Documented node limit	Not checked yet	Not checked yet
Our review
Pros	Replicated, partitioned event storage supports fault-tolerant deployments. Kafka Streams provides joins, aggregations, filters, and transformations. Kafka Connect integrates source and sink systems, including Postgres and S3.	Replicates data across datacenters with tunable consistency levels Scales horizontally by adding nodes Offers CQL, lightweight transactions, snapshots, and incremental backups
Cons	Requires self-hosted deployment rather than a vendor-hosted plan. Operating Kafka across clusters calls for distributed-systems expertise. Support channels are community and documentation.	Requires self-managed deployment Community and documentation are the listed support channels Wide-column data model may not suit workloads needing another database model
Our verdict	Apache Kafka is an open-source distributed event streaming platform for building data pipelines, streaming analytics, data integration systems, and applications. It is aimed at mid-market and enterprise teams that need to publish, consume,… Read the review →	Apache Cassandra is an open-source, distributed NoSQL database built around a partitioned wide-column data model. It is aimed at teams managing large datasets and high-volume reads and writes across distributed deployments. The product is… Read the review →

Strengths and trade-offs

• Apache Kafka — where it wins

  • Replicated, partitioned event storage supports fault-tolerant deployments.
  • Kafka Streams provides joins, aggregations, filters, and transformations.
  • Kafka Connect integrates source and sink systems, including Postgres and S3.

  Where it doesn't

  • Requires self-hosted deployment rather than a vendor-hosted plan.
  • Operating Kafka across clusters calls for distributed-systems expertise.
  • Support channels are community and documentation.

• Apache Cassandra — where it wins

  • Replicates data across datacenters with tunable consistency levels
  • Scales horizontally by adding nodes
  • Offers CQL, lightweight transactions, snapshots, and incremental backups

  Where it doesn't

  • Requires self-managed deployment
  • Community and documentation are the listed support channels
  • Wide-column data model may not suit workloads needing another database model

• Apache Kafka9.4/10 · Open source

  Open-source event streaming for teams building self-hosted data pipelines and stream processing.

  Visit Apache KafkaFull verdict →
• Apache Cassandra9.1/10 · Open source

  A self-managed database for teams that need multi-datacenter replication and tunable consistency.

  Try Apache CassandraFull verdict →