Insomnia: Insomnia is another strong alternative that is frequently recommended. It is known for its simplicity and effectiveness in making REST API requests. Insomnia supports the import of Postman collections and is praised for its performance and ease of use. It is also mentioned in the context of being used for making REST API requests against test shards, which indicates its capability to handle complex API interactions.
Apidog: Apidog is noted for its user-friendly interface and the ability to support existing Postman scripts. It is particularly recommended for collaborative API design and testing. However, it may not be as feature-rich as Postman for advanced automation workflows.