ETL tools can generally be categorized into cloud-based ETL tools and on-premise ETL tools. Cloud-based ETL tools are hosted on the provider's cloud infrastructure, offering scalability, flexibility, and often a lower initial cost since they typically operate on a subscription model. These tools are accessible from anywhere with an internet connection and are maintained by the service provider. On-premise ETL tools, on the other hand, are installed and run on a company's own servers and hardware. This option gives businesses full control over their data and infrastructure, often preferred for its potential for enhanced security and compliance with strict data regulations. The choice between cloud-based and on-premise ETL tools depends on a company's specific needs, including cost considerations, security requirements, and scalability needs.