Sorry, but I've been there done that. "Here, just try it for free", they say. "What harm can it do?", they say. "Licensing costs will be basically nothing", they say. "Trust us", they say.

So I try, and I like and I get used to it and then they start with "Oh you wanted to use that one really useful feature, That will be $5000 extra. Oh, you're running on Solaris, that will be $10000 extra. Oh you have more than 2 CPUs, that will be $20000 extra. Oh you want to use it Thursdays as well, that will be $30000 extra".

So now I never ever try software until I've seen a complete price list.

Fair enough.

Wallaby.js will be less expensive than some similar commercial solutions for other languages.

In any case, feel free to sign up and to receive the pricing info as soon as it's available.

So judging by other comments on this article the price ceiling is set at $160USD :-)

He said " less expensive than some similar" software, not all similar software. So for any given price point all they need is someone somewhere selling something similar for more.

Well, SBT has this built in. For free.