Apache Kafkavs
Confluent Cloud
Confluent Cloud: Managed Kafka from the company founded by its creators, removing the broker operations that make self-hosting expensive
Apache Kafka
Open-source distributed event streaming platform
As of 29 August 2026, Apache Kafka is free to use. The distributed event streaming platform behind most large data pipelines. Softwr lists it under Databases. Apache Kafka is made by Apache Software Foundation, launched in 2011, available on Linux, Windows, macOS, Self-hosted.
Overview
What Apache Kafka does
Apache Kafka is an open-source distributed event streaming platform used for high-performance data pipelines, streaming analytics, data integration and mission-critical applications. It sits between systems that produce events and systems that consume them, keeping an ordered, durable, replayable log in between. That log is the reason Kafka displaced traditional message queues in large architectures. A queue typically deletes a message once it is read; Kafka retains it, so a new consumer can read history from the beginning, and a broken consumer can be fixed and replayed rather than losing data. The project reports latencies as low as 2ms at network-limited throughput, production clusters of up to a thousand brokers handling trillions of messages a day, and Connect integrations with hundreds of sources and sinks including Postgres, JMS, Elasticsearch and Amazon S3. It is one of the five most active projects at the Apache Software Foundation, under the Apache License v2.
What people use it for
- Moving events between services without point-to-point coupling
- Feeding analytics and warehouses from operational systems in near real time
- Replaying history to rebuild state after a consumer bug
- Buffering bursty producers ahead of slower downstream systems
The honest half
Where it falls short
Concrete and checkable, so you can decide whether any of them matter to you. This is the half of a review a vendor will not write about Apache Kafka.
- Operationally heavy to self-host: brokers, storage, rebalancing and upgrades are a standing job, which is why managed Kafka is a large market
- Overkill for straightforward job queues, where a simpler broker is easier to run and reason about
- Ordering guarantees hold per partition, not per topic, and getting partitioning wrong is a common and expensive design mistake
- The ecosystem is fragmented across the Apache project and vendor distributions, so documentation and tooling advice often assume a particular distribution
Cross-shopped
What people choose instead of Apache Kafka
Each pairing was judged by two reviewers asking whether a buyer would genuinely weigh the two against each other. The ones that failed were deleted rather than published.
- Apache KafkavsTemporal
Temporal: Solves the neighbouring problem of durable execution rather than event transport, and is often weighed against Kafka for orchestration work
Pricing
What Apache Kafka costs
Taken from the vendor's own pricing page. Prices move, so check before you buy.
Apache Kafka
Free
- Full platform
- Kafka Connect
- Kafka Streams
- No broker or throughput limits
Capabilities
Features
Durable commit log
Events are retained and replayable rather than consumed and deleted
Horizontal scale
Clusters reported up to a thousand brokers and petabytes of data
Kafka Connect
Prebuilt connectors to hundreds of sources and sinks
Kafka Streams
Joins, aggregations, filters and transformations with exactly-once semantics
Replication
Fault-tolerant across brokers, availability zones and regions
Low latency
Latencies as low as 2ms at network-limited throughput
Answered, with sources
Questions people ask
Each answer names the page it came from, so you can check it rather than take our word for it.
Is Apache Kafka free?
Yes. Kafka is open source under the Apache License v2 with no licence fee. Costs come from the infrastructure you run it on, or from a managed service such as Confluent Cloud.
How is Kafka different from a message queue?
A queue usually removes a message once it is consumed. Kafka keeps an ordered, durable log, so consumers track their own position and history can be replayed — which is what makes rebuilding state after a bug possible.
Who uses Kafka?
The project reports use by more than 80% of the Fortune 100, with over 5 million lifetime downloads.
Do I need to run Kafka myself?
No. Self-hosting is the operationally expensive option; managed services such as Confluent Cloud run the brokers for you and bill on throughput and storage instead.
Keep looking
Where to go from Apache Kafka
- Apache Kafka alternativesEvery product people weigh against it
- Apache Kafka pricingPlans, floors and what the tiers exclude
- Apache Kafka badgesWhich rules it meets, and the figure behind each
- All Databases softwareThe full category
- Best Databases softwareThe shortlist, and how it was cut
Best Databases software for
Compare Apache Kafka with
- Redpanda
- RabbitMQ
- NATS
- Solace PubSub+
- TIBCO Enterprise Message Service
- Timeplus
- Estuary
- PostgreSQL
- DuckDB
- Aiven
- OpenSearch
- Presto
- Firebase Realtime Database
- Memcached
- MotherDuck
- Neo4j
- OpenSearch
- Firestore
Other Databases software
Multi-protocol event broker sold as software, cloud service or a hardware appliance
Free plan12 researched notesJMS message broker underpinning bank and telecom estates, now maintained rather than expanded
Pricing on request12 researched notesStreaming SQL engine built on ClickHouse internals, shipping as one small binary
Free, then $199/mo12 researched notesReal-time data integration combining streaming, CDC, and batch
Free, then $0.5/GB10 researched notesMIT-licensed analytical SQL database that runs inside your process, with no server, no dependencies and one writer at a time.
Free plan14 researched notesOpen-source search and analytics suite forked from Elasticsearch
Open source9 researched notesThe Meta-lineage distributed SQL query engine, distinct from the Trino fork
Open source12 researched notesStore and sync data in real-time across all clients
Free plan12 researched notesOpen-source search and analytics suite forked from Elasticsearch
Open source9 researched notes
Softwr does not host reviews and shows no star rating for Apache Kafka, because a rating we did not collect is not ours to publish. What is here is the pricing and platform detail from the vendor’s own pages, limitations we could state concretely, and alternatives a reviewer confirmed people weigh against it. Tell us if any of it is wrong.
More on Apache Kafka
Apache Kafka alternatives
What people switch to, and what they give up
Apache Kafka pricing
Every tier, and where the cost actually lands
Compare Apache Kafka
Put it head to head with anything we hold
Apache Kafka badge
Its rating, and an embed for your own site
Best Databases software alternatives
Industrial process historian with published per-tag pricing and no client licence fees
Per tag band per year
NetApp-owned managed service for Cassandra, Kafka, OpenSearch, PostgreSQL and Cadence with a bring-your-own-cloud model
quote
Erlang MQTT broker for large IoT fleets, relicensed to BSL with production free use limited to one node
Per month by connection and session volume
Attribute-based access control and masking applied inside Snowflake, Databricks and BigQuery
quote
MPP analytical database with a MySQL wire protocol and sub-second aggregation on wide tables
Open source, no licence fee
Streaming database that maintains incremental materialised views in SQL instead of Flink jobs
Per RisingWave Unit hour
Centralised data access governance from the creators of Apache Ranger, now rebranding as Trust3 AI
quoteThe Meta-lineage distributed SQL query engine, distinct from the Trino fork
Open source, no licence fee