Boomi

I can only speak to the applications where it is best suited, as my overall experience with the application is not at an expert level. But it seems to be very well suited to move data between systems. Its rare that we have an issue with it

Boomi is well suited for all integration scenarios that doesn't involve requirements for optimal performance and throughput. The platform is performant, however not to the level of handling huge number of requests per second. This is where a microservices-based architecture based on containerization could be more appropriate The runtime is a single JVM process, so all integrations basically runs under the same JVM, hence there's no capability to scale / auto-scale integrations separately.

However, if this is not the case, Boomi does a decent job in integrating different systems and in data synchronization as well. It's easy to use so doesn't require hard code developers. I've seen business analysts and testers developing integrations on Boomi.

Well Suited:
if you're looking for low-code solutions and you only have partial team at your disposal, then Boomi might be the right choice for you.

Not Suited:
if you have both Web developer team and ABAP team in-house, and you're application logic goes way more custom. it is better to do it on your own with plain old RESTful APIs.

Legacy systems often need to be replaced or integrated with new applications in order to modernize businesses. A strong API strategy that avoids custom coding and third-party programs is essential to enable this integration. Boomi's new-age connectivity and integration solutions ensure safe, secure, and robust integration. In the age of information, businesses are under more pressure than ever to be able to collect and manage large amounts of data. This data comes in from a variety of sources, including personalized devices such as voice assistants and wearable tech. While this data can be immensely valuable to businesses, they often lack the infrastructure necessary to handle it effectively. This can lead to data build-up in databases or silos, and can eventually lead to problems with integration and security.

Dell Boomi is well suited for mid-sized companies and preferably integrated with SAP or any well-known provider but I would recommend for start-up and small businesses as they might find the pricing a bit too exaggerated.

Also if you are using your own CRM, integrating Boomi can be challenging even with the customer support.