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 believe that the CAC (customer acquisition cost) is not a relevant measure for a marketplace. It is relevant for a recurring-payment SaaS product.
I suggest finding a more meaningful measure for a marketplace, e.g. Cost per Sale in Marketplace (CSM?).
Then you can measure the average sale price in the marketplace, the average commission your business takes, and go from there estimating the required cost per sale in the marketplace to make it worthwhile.
For example, if your sales transaction price in the marketplace averages to $100, and you take $5, you need to make sure that the cost of making that happen is not more than $5 (and preferably much less).
I've successfully helped over 150 entrepreneurs, startups, and businesses, and I would be happy to help you. Please send me more information before scheduling a call - so I can give you maximum value for your money. Take a look at the great reviews I’ve received: https://clarity.fm/ripul.chhabra