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Apache Flink vs Apache Kafka comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Dec 17, 2024

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Categories and Ranking

Apache Flink
Ranking in Streaming Analytics
4th
Average Rating
7.8
Reviews Sentiment
6.7
Number of Reviews
19
Ranking in other categories
No ranking in other categories
Apache Kafka
Ranking in Streaming Analytics
3rd
Average Rating
8.2
Reviews Sentiment
6.9
Number of Reviews
92
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of October 2026, in the Streaming Analytics category, the mindshare of Apache Flink is 6.9%, down from 14.6% compared to the previous year. The mindshare of Apache Kafka is 3.6%, up from 3.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Streaming Analytics Mindshare Distribution
ProductMindshare (%)
Apache Kafka3.6%
Apache Flink6.9%
Other89.5%
Streaming Analytics
 

Featured Reviews

Sanjay Srivastava - PeerSpot reviewer
Software Architect at IBM
Streaming workflows have improved data integration and support real-time pipelines across platforms
We are not using Apache Flink in its advanced window capabilities. We are using the Apache Flink job in Apache SeaTunnel, meaning we can write the code inside Apache SeaTunnel. Currently, we are moving; both solutions are there. We are doing it on-premises with the help of Kubernetes and OpenShift. The main reason why Apache Flink is better is that it has more functions, and being open source with easy code in Apache SeaTunnel helps us achieve that. Cost is a major issue. I would rate the stability of the product as an eight. For Apache Flink, the final point can be rated an eight. I can recommend Apache Flink to other users for streaming support, and I am recommending it. I would rate this review an eight overall.
Amandeep Pawar - PeerSpot reviewer
Engineer Technology at Iris Software Technologies Private Limited
Event-driven architecture has improved asynchronous communication and supports high throughput
We can improve the high throughput because there are some limitations. We could add something to improve Apache Kafka. Based on my daily usage and analysis, there is a complex setup and management, which is one area requiring improvement. Apache Kafka does not have built-in message delay or scheduling capabilities. Apache Kafka cannot natively schedule messages. Limited message prioritization is also an area requiring improvement. Ordering is limited to a single partition. Large messages affect performance. Apache Kafka is optimized for many small to medium-sized messages, but large payloads increase network usage, increase disk usage, and slow down producers and consumers. I rate Apache Kafka eight out of ten instead of ten out of ten because operating an Apache Kafka cluster requires expertise in partitioning, application monitoring, and capacity planning. Self-managed deployment can become complex as the cluster grows. Pro-managed Apache Kafka services significantly reduce the operational overhead.

Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Pros

"Apache Flink offers a range of powerful configurations and experiences for development teams. Its strength lies in its development experience and capabilities."
"Another feature is how Flink handles its radiuses. It has something called the checkpointing concept. You're dealing with billions and billions of requests, so your system is going to fail in large storage systems. Flink handles this by using the concept of checkpointing and savepointing, where they write the aggregated state into some separate storage. So in case of failure, you can basically recall from that state and come back."
"What I appreciate best about Apache Flink is that it's open source and geared towards a distributed stream processing framework."
"Apache Flink allows you to reduce latency and process data in real-time, making it ideal for such scenarios."
"Easy to deploy and manage."
"The main advantage is the turnaround time, which has been reduced drastically because of Apache Flink, and now everything is in almost real time with no waiting or lag of data in the application while machine resources are utilized much more efficiently."
"With Flink, it provides out-of-the-box checkpointing and state management. It helps us in that way. When Storm used to restart, sometimes we would lose messages. With Flink, it provides guaranteed message processing, which helped us. It also helped us with maintenance or restarts."
"We value this solution's intricate system because it comes with a state inside the mechanism and product, allowing us to process batch data, stream to real-time and build pipelines, and we do not need to process data from the beginning when we pause as we can continue from the same point where we stopped, helping us save time as 95% of our pipelines will now be on Amazon and we'll save money by saving time."
"It's a high-performance distributed system."
"For example, when you want to send a message to inform all your clients about a new feature, you can publish that message to a single topic in Apache Kafka. This allows all clients subscribed to that topic to receive the message. On the other hand, if you need to send billing information to a specific customer, you can publish that message on a topic dedicated to that customer. This message can then be sent as an SMS to the customer, allowing them to view it on their mobile device."
"Apache Kafka has helped out the organization because we leverage it for all our eCommerce real-time analytics use cases."
"The most valuable feature is the messaging function and reliability."
"When we're working with big data, we need a throughput computing panel, which is something that Kafka provides, and something we find extremely valuable."
"The most valuable feature of Apache Kafka is the clustering which is very easy to scale and we have multiple servers all over our platforms. It has been useful for stability and performance."
"When starting out with minimal hardware, Kafka has a guaranteed delivery mechanism that is very easy to set up and can handle very large data volumes, helping to speed up the timeline from prototype all the way to production volumes."
"I believe that the speed, and especially the performance, are very good features."
 

Cons

"Apache Flink should improve its data capability and data migration."
"The solution could be more user-friendly."
"Failure is another area where it is a bit rigid or not that flexible."
"In terms of improvement, there should be better reporting. You can integrate with reporting solutions but Flink doesn't offer it themselves."
"We have a machine learning team that works with Python, but Apache Flink does not have full support for the language."
"PyFlink is not as fully featured as Python itself, so there are some limitations to what you can do with it."
"Flink has become a lot more stable but the machine learning library is still not very flexible."
"In terms of stability with Flink, it is something that you have to deal with every time. Stability is the number one problem that we have seen with Flink, and it really depends on the kind of problem that you're trying to solve."
"This product guarantees at-least-once delivery."
"The repository isn't working very well. It's not user friendly."
"Apache Kafka can improve by making the documentation more user-friendly. It would be beneficial if we could explain to customers in more detail how the solution operates but the documentation get highly technical quickly. For example, if they had a simple page where we can show the customers how it works without the need for the customer to have a computer science background."
"More adapters for connecting to different systems need to be available."
"The interface of Apache Kafka could be significantly better."
"Apache Kafka can improve by providing a UI for monitoring."
"In the next release, I would like for there to be some authorization features and HTL security; we also need bigger software and better monitoring."
"Data pulling and restart ability need improving."
 

Pricing and Cost Advice

"It's an open-source solution."
"Apache Flink is open source so we pay no licensing for the use of the software."
"This is an open-source platform that can be used free of charge."
"It's an open source."
"The solution is open-source, which is free."
"It's a bit cheaper compared to other Q applications."
"I was using the product's free version."
"The solution is free, it is open-source."
"The price of the solution is low."
"Kafka is an open-source solution, so there are no licensing costs."
"The cost can vary depending on the provider and the specific flavor or version you use. I'm not very knowledgeable about the pricing details."
"This is an open-source version."
"Licensing issues are not applicable. Apache licensing makes it simple with almost zero cost for the software itself."
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Top Industries

By visitors reading reviews
Financial Services Firm
16%
Retailer
14%
Computer Software Company
8%
Comms Service Provider
6%
Financial Services Firm
15%
Outsourcing Company
12%
Manufacturing Company
9%
Computer Software Company
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business5
Midsize Enterprise3
Large Enterprise12
By reviewers
Company SizeCount
Small Business33
Midsize Enterprise20
Large Enterprise51
 

Questions from the Community

What needs improvement with Apache Flink?
Apache could improve Apache Flink by providing more functionality, as they need to fully support data integration. The connectors are still very few for Apache Flink. There is a lack of functionali...
What is your primary use case for Apache Flink?
I am working with Apache Flink, which is the tool we use for data integration. Apache Flink is for data, and we are working on the data integration project, not big data, using Apache Flink and Apa...
What advice do you have for others considering Apache Flink?
We are not using Apache Flink in its advanced window capabilities. We are using the Apache Flink job in Apache SeaTunnel, meaning we can write the code inside Apache SeaTunnel. Currently, we are mo...
What are the differences between Apache Kafka and IBM MQ?
Apache Kafka is open source and can be used for free. It has very good log management and has a way to store the data used for analytics. Apache Kafka is very good if you have a high number of user...
What is your experience regarding pricing and costs for Apache Kafka?
Based on my understanding for the setup and cost to set up Apache Kafka, I was not responsible for the pricing or licensing decisions. Apache Kafka itself is open source and free to use. Infrastruc...
What needs improvement with Apache Kafka?
We can improve the high throughput because there are some limitations. We could add something to improve Apache Kafka. Based on my daily usage and analysis, there is a complex setup and management,...
 

Also Known As

Flink
No data available
 

Overview

 

Sample Customers

LogRhythm, Inc., Inter-American Development Bank, Scientific Technologies Corporation, LotLinx, Inc., Benevity, Inc.
Uber, Netflix, Activision, Spotify, Slack, Pinterest
Find out what your peers are saying about Apache Flink vs. Apache Kafka and other solutions. Updated: September 2026.
917,403 professionals have used our research since 2012.