The verdict
If you want to automate contracts, onboarding packs and approvals, pick airSlate. If you are a developer building an agent or app where each customer connects their own accounts, pick Pipedream Connect. Those are separate jobs.
If you wanted a visual builder to link your own tools, neither is the answer today. I would look at Zapier, Make or n8n. I would not start a new automation project on the old Pipedream Workflows product.