Can you use the FreeRTOS OTA Agent without using AWS IoT?

The FreeRTOS OTA library uses several AWS IoT Core services such as AWS IoT Device Management, AWS IoT Jobs, and a streaming service (apart from non-AWS IoT services like Amazon S3, and optionally AWS Signer). This has been done to give customers a smooth end-end OTA update experience. However, if the customer doesn’t want to be tied to AWS IoT Core, it might take less effort to implement another OTA method (such as polling for new firmware versions in Amazon S3 or any 3P storage using HTTPS) than to modify the open source FreeRTOS OTA library.