The best alternatives to RillRate are Autocode, Bot UI Kit for Slack, and Coherent UI. If these 3 options don't work for you, we've listed a few more alternatives below.
Autocode is an integrated development environment (IDE) for connecting APIs and creating app-to-app workflows. It provides API autocomplete, code generation, easy multi-app auth, in-browser code execution, dev environments, logging, revision history + more.
A developer tool to provide data-driven microservice clustering recommendations to aid engineers in assessing the benefits of transitioning their monolithic application to a microservice architecture.