The verdict
For a small B2B team that wants a connected stack without developers, pick Zapier. It handles the form that must reach the CRM and the deal win that must reach Slack. If you ship code with more than one contributor, human or agent, you need GitHub as well, and Zapier will not replace it. I would not use Actions to move business data between apps. Pipelines for code belong on GitHub, and quick links between popular apps belong on Zapier. If your workflows turn complex, with loops and heavy branching, look at Make or n8n later rather than stretching either tool here.