We are building a crowdsourcing marketplace, where we will have clients on one side and freelancers on the other side. Let's say we have the freelancers side under control and we don't need to acquire freelancers at the moment. What would be a regular CAC value in order to acquire clients in our platform?
I think you're looking at this the wrong way. Your customer acquisition cost is not something you should benchmark against other businesses. Without knowing more, like your short and long-term goals, it's impossible to answer.
Two companies with similar business models may have different answers to this question. A venture-backed startup trying to keep up with aggressive revenue goals may be able to stomach an astronomical CAC. A bootstrapped startup that is not seeking venture money may aim for slower growth and much lower CAC.
I suggest setting up a call with a marketing or finance expert to determine what CAC is appropriate for your company and how to get there.