List of the Top 7 Real-Time Data Streaming Tools for Apache Flink in 2025

StarTree Cloud functions as a fully-managed platform for real-time analytics, optimized for online analytical processing (OLAP) with exceptional speed and scalability tailored for user-facing applications. Leveraging the capabilities of Apache Pinot, it offers enterprise-level reliability along with advanced features such as tiered storage, scalable upserts, and a variety of additional indexes and connectors. The platform seamlessly integrates with transactional databases and event streaming technologies, enabling the ingestion of millions of events per second while indexing them for rapid query performance. Available on popular public clouds or for private SaaS deployment, StarTree Cloud caters to diverse organizational needs. Included within StarTree Cloud is the StarTree Data Manager, which facilitates the ingestion of data from both real-time sources—such as Amazon Kinesis, Apache Kafka, Apache Pulsar, or Redpanda—and batch data sources like Snowflake, Delta Lake, Google BigQuery, or object storage solutions like Amazon S3, Apache Flink, Apache Hadoop, and Apache Spark. Moreover, the system is enhanced by StarTree ThirdEye, an anomaly detection feature that monitors vital business metrics, sends alerts, and supports real-time root-cause analysis, ensuring that organizations can respond swiftly to any emerging issues. This comprehensive suite of tools not only streamlines data management but also empowers organizations to maintain optimal performance and make informed decisions based on their analytics.

Apache Doris is a sophisticated data warehouse specifically designed for real-time analytics, allowing for remarkably quick access to large-scale real-time datasets. This system supports both push-based micro-batch and pull-based streaming data ingestion, processing information within seconds, while its storage engine facilitates real-time updates, appends, and pre-aggregations. Doris excels in managing high-concurrency and high-throughput queries, leveraging its columnar storage engine, MPP architecture, cost-based query optimizer, and vectorized execution engine for optimal performance. Additionally, it enables federated querying across various data lakes such as Hive, Iceberg, and Hudi, in addition to traditional databases like MySQL and PostgreSQL. The platform also supports intricate data types, including Array, Map, and JSON, and includes a variant data type that allows for the automatic inference of JSON data structures. Moreover, advanced indexing methods like NGram bloomfilter and inverted index are utilized to enhance its text search functionalities. With a distributed architecture, Doris provides linear scalability, incorporates workload isolation, and implements tiered storage for effective resource management. Beyond these features, it is engineered to accommodate both shared-nothing clusters and the separation of storage and compute resources, thereby offering a flexible solution for a wide range of analytical requirements. In conclusion, Apache Doris not only meets the demands of modern data analytics but also adapts to various environments, making it an invaluable asset for businesses striving for data-driven insights.

Numerous users take advantage of Amazon Managed Service for Apache Flink to run their stream processing applications with high efficiency. This platform facilitates real-time data transformation and analysis through Apache Flink while ensuring smooth integration with a range of AWS services. There’s no need for users to manage servers or clusters, and there’s no requirement to set up any computing or storage infrastructure. You only pay for the resources you consume, which provides a cost-effective solution. Developers can create and manage Apache Flink applications without the complexities of infrastructure setup or resource oversight. The service is capable of handling large volumes of data at remarkable speeds, achieving subsecond latencies that support real-time event processing. Additionally, users can deploy resilient applications using Multi-AZ deployments alongside APIs that aid in managing application lifecycles. It also enables the creation of applications that can seamlessly transform and route data to various services, such as Amazon Simple Storage Service (Amazon S3) and Amazon OpenSearch Service, among others. This managed service allows organizations to concentrate on their application development instead of worrying about the underlying system architecture, ultimately enhancing productivity and innovation. As a result, businesses can achieve greater agility and responsiveness in their operations, leading to improved outcomes.

Streamkap is an innovative streaming ETL platform that leverages Apache Kafka and Flink, aiming to swiftly transition from batch ETL processes to streaming within minutes. It facilitates the transfer of data with a latency of mere seconds, utilizing change data capture to minimize disruptions to source databases while providing real-time updates. The platform boasts numerous pre-built, no-code connectors for various data sources, automatic management of schema changes, updates, normalization of data, and efficient high-performance CDC for seamless data movement with minimal impact. With the aid of streaming transformations, it enables the creation of faster, more cost-effective, and richer data pipelines, allowing for Python and SQL transformations that cater to prevalent tasks such as hashing, masking, aggregating, joining, and unnesting JSON data. Furthermore, Streamkap empowers users to effortlessly connect their data sources and transfer data to desired destinations through a reliable, automated, and scalable data movement framework, and it accommodates a wide array of event and database sources to enhance versatility. As a result, Streamkap stands out as a robust solution tailored for modern data engineering needs.

DeltaStream serves as a comprehensive serverless streaming processing platform that works effortlessly with various streaming storage solutions. Envision it as a computational layer that enhances your streaming storage capabilities. The platform delivers both streaming databases and analytics, along with a suite of tools that facilitate the management, processing, safeguarding, and sharing of streaming data in a cohesive manner. Equipped with a SQL-based interface, DeltaStream simplifies the creation of stream processing applications, such as streaming pipelines, and harnesses the power of Apache Flink, a versatile stream processing engine. However, DeltaStream transcends being merely a query-processing layer above systems like Kafka or Kinesis; it introduces relational database principles into the realm of data streaming, incorporating features like namespacing and role-based access control. This enables users to securely access and manipulate their streaming data, irrespective of its storage location, thereby enhancing the overall data management experience. With its robust architecture, DeltaStream not only streamlines data workflows but also fosters a more secure and efficient environment for handling real-time data streams.

VeloDB, powered by Apache Doris, is an innovative data warehouse tailored for swift analytics on extensive real-time data streams. It incorporates both push-based micro-batch and pull-based streaming data ingestion processes that occur in just seconds, along with a storage engine that supports real-time upserts, appends, and pre-aggregations, resulting in outstanding performance for serving real-time data and enabling dynamic interactive ad-hoc queries. VeloDB is versatile, handling not only structured data but also semi-structured formats, and it offers capabilities for both real-time analytics and batch processing, catering to diverse data needs. Additionally, it serves as a federated query engine, facilitating easy access to external data lakes and databases while integrating seamlessly with internal data sources. Designed with distribution in mind, the system guarantees linear scalability, allowing users to deploy it either on-premises or as a cloud service, which ensures flexible resource allocation according to workload requirements, whether through the separation or integration of storage and computation components. By capitalizing on the benefits of the open-source Apache Doris, VeloDB is compatible with the MySQL protocol and various functions, simplifying integration with a broad array of data tools and promoting flexibility and compatibility across a multitude of environments. This adaptability makes VeloDB an excellent choice for organizations looking to enhance their data analytics capabilities without compromising on performance or scalability.

Scale from zero to millions of events each second with Arroyo, which is provided as a single, efficient binary. It can be executed locally on MacOS or Linux for development needs and can be seamlessly deployed into production via Docker or Kubernetes. Arroyo offers a groundbreaking approach to stream processing that prioritizes the ease of real-time operations over conventional batch processing methods. Designed from the ground up, Arroyo enables anyone with a basic knowledge of SQL to construct reliable, efficient, and precise streaming pipelines. This capability allows data scientists and engineers to build robust real-time applications, models, and dashboards without requiring a specialized team focused on streaming. Users can easily perform operations such as transformations, filtering, aggregation, and data stream joining merely by writing SQL, achieving results in less than a second. Additionally, your streaming pipelines are insulated from triggering alerts simply due to Kubernetes deciding to reschedule your pods. With its ability to function in modern, elastic cloud environments, Arroyo caters to a range of setups from simple container runtimes like Fargate to large-scale distributed systems managed with Kubernetes. This adaptability makes Arroyo the perfect option for organizations aiming to refine their streaming data workflows, ensuring that they can efficiently handle the complexities of real-time data processing. Moreover, Arroyo’s user-friendly design helps organizations streamline their operations significantly, leading to an overall increase in productivity and innovation.