Apache Flink: Pricing, Features & Alternatives
Flink runs stateful computations over unbounded streams and bounded batches. It keeps very large state with incremental checkpoints, gives exactly-once state consistency, handles event time and late data, and offers SQL, the DataStream API and ProcessFunction at different levels of control. Typical jobs are event-driven applications, streaming analytics and streaming ETL. Flink is an Apache Software Foundation project and free to run; 2.3 is the current stable line. Managed versions include Amazon Managed Service for Apache Flink at $0.11 per KPU-hour in US East plus one orchestration KPU per application.
Who it’s for: Data and platform engineers running large stateful streaming jobs who need exactly-once results and can operate a cluster or pay for a managed one.
Category
Stream Processing
Pricing
Free tier available
Free tier
Yes
Best for
Stream Processing: stateful streaming, exactly-once, Flink SQL
Apache Flink at a Glance
- What it is
- Distributed stream processing engine
- Write jobs in
- Flink SQL or the DataStream API
- Licence
- Apache 2.0
- Where it runs
- Your cluster or a managed service
- How you pay
- Free; managed services bill by compute
Checked November 2026 against Apache Flink, Amazon Managed Service for Apache Flink pricing.
Apache Flink Pricing Plans (2026)
| Plan | Price |
|---|---|
| Open sourcePopular | $0 (Apache 2.0) |
| Amazon Managed Flink | $0.11 / KPU-hour (US East) |
Pricing summary: Free · paid from $0.11/mo. Always confirm current pricing on the official site.
Key Apache Flink Features
- Apache Software Foundation project, free; 2.3 is the current stable line
- Exactly-once state consistency, event-time processing and late data handling
- Very large state with incremental checkpoints; savepoints for upgrades
- Flink SQL, the DataStream API and ProcessFunction for different levels of control
- Amazon Managed Service for Apache Flink: $0.11 per KPU-hour in US East, plus 1 KPU per application and $0.10 per GB-month of running storage
Pros
- +Exactly-once state consistency
- +Handles very large state
- +SQL and low-level APIs in one engine
- +Managed options on major clouds
Cons
- −Operating clusters and checkpoints takes expertise
- −Steep learning curve beyond SQL
- −JVM tuning for big jobs
Best Apache Flink Alternatives
Compare allApache Flink Compared
Apache Flink FAQ
What is Apache Flink used for?⌄
Apache Flink is a stream processing tool. Open-source engine for stateful stream processing with exactly-once state, event time and Flink SQL. Apache 2.0.
Is Apache Flink free?⌄
Yes. Apache Flink has a free tier you can start with, and paid plans for more usage and features.
How much does Apache Flink cost?⌄
Apache Flink offers a free tier, with paid plans starting at $0.11/month.
What are the best Apache Flink alternatives?⌄
Popular Apache Flink alternatives include Kafka Streams, Materialize, RisingWave. Compare pricing and features on our Apache Flink alternatives page.
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