Review of current agentic workflow builders

I've been working with both code-based frameworks and low-code platforms for building agentic workflows, and it's been interesting to watch how the two are starting to converge. It’s becoming less about choosing between “code” or “low-code,” and more about combining the best of both—visual logic, reusable components, and the ability to drop into code when needed.

This shift has made it much easier to iterate. I can now build complex workflows, connect tools, and run agents in the background without having to manage everything manually. But even with all this progress, there are still a few areas where current tools feel limited.

Debugging and visibility are still major pain points. It’s hard to tell why an agent made a certain decision or what caused a failure. Memory is another challenge—most systems provide basic context injection or vector search, but persistent, structured memory that agents can reason over is still early. I also think control flow could be more flexible. Many platforms are great for chaining steps, but less equipped for retries, branching, or nested logic. I've predominantly been using Sim Studio, which seems to be addressing most of these constraints. I'm curious to see what you all think about this. Also, what do you think is still missing from the current generation of agentic workflow builders?