Apache Kafka vs QuestDB

Apache Kafka is an open-source distributed event streaming platform used for building real-time data pipelines and streaming applications. Originally developed at LinkedIn, it provides high-throughput, fault-tolerant publish-subscribe messaging with persistent storage. Kafka supports stream processing through Kafka Streams and ksqlDB.

QuestDB is High-performance time-series database with SQL support optimized for fast ingestion and real-time analytics.. It is available under a freemium model. This tool falls under the databases category.