The short answer: charging even a small amount usually tells you more than a free beta, but free can still be right when you need volume of feedback more than proof of willingness to pay. The choice depends on what question your beta is meant to answer.
Here is how to think it through.
Decide what the beta is for
A beta can answer different questions: does the product work, do people understand it, will anyone pay. If your open question is willingness to pay, a free beta cannot answer it. If your open question is whether the product holds together for many kinds of users, free access can get you there faster.
A price is a filter, not just revenue
Charging something, even a token amount, changes who signs up. People who pay tend to have the problem you solve and tend to give sharper feedback, because their money is at stake. A free beta can fill up with curious browsers whose opinions may send you in the wrong direction.
Free can be right when reach matters more
Some products need a crowd to work at all: marketplaces, communities, anything with network effects. For those, an early paywall can strangle the very thing being tested. If your product only becomes useful with many users, free access during beta may be the practical choice.
If you charge, keep the deal simple
A common beta pattern is a discount for early users in exchange for feedback and patience with rough edges. Say plainly what they get, what stage the product is in, and what happens to the price later. Surprises at renewal can undo the goodwill a beta builds.
You can change the answer later
The beta price is not a life sentence. Teams often start free to learn, then introduce a charge once the product stabilizes, or start paid and open a free tier later. What matters is knowing which question you are answering at each stage.
Quick answers
Will charging scare away all my testers? It will scare away some. The ones who stay are often exactly the users you want to learn from.
Should beta users get a refund if they leave? A simple refund policy can lower the barrier to paying early and costs little when numbers are small.
Can I raise the price after beta? Yes, and telling early users their rate is locked or time-limited avoids hard feelings later.
The takeaway
Charge when you need to prove people will pay; stay free when you need volume and reach to learn. Pick the question first, and the pricing answer follows.
When the beta becomes a launch, submit your startup on Maidensail, or see how other founders present their products in the registry. For setting the price itself, read our post on pricing your product.