I used Zapier when I started playing around with AI agents. I was testing automated multimedia, retrieval, formatting, and posting.
However, Zapier isn’t really an agent as much as a workflow builder, which is what makes it easy to use. It does have an AI that will assist you in generating the flow and the necessary connections to associated services (although I often found it to have problems).
It has an extensive library of app integrations and supports API connections. Getting the hang of the interface took me a couple of hours. You can build anything you want on the free tier, but you can not publish it if it has more than one step, which pretty much forces you to upgrade. Luckily, the pricing is not outrageous.
The limitation is that, while there are LLM connectors, they still must be configured correctly. Zapier is more of a if this then that vs an autonomous AI agent. Even with AI Agents, you’re going to need a flow to prompt the agent. If anything Zapier is a great way to work out a flow and test it. However if you’re looking for more of an AI agent that access tools and makes decisions on which tool and when to use it, zapier isn’t for you.

