This is simply not correct. I’ve used them countless times and there are no hidden fees.
After you enter the data You pay for the shipping label that you see on their site..that’s it.
USPS and UPS are the only carriers they offer.
Seconded. Been using PirateShip for close to 3 years. Have yet to have a single problem. I've easily saved hundreds of $ by now, compared to any other way to purchase shipping.
PirateShip appears to make their money by something like the following:
1) Contract with USPS and UPS for high-volume shipping over some period.
2) Resell this shipping service to customers, with some margin added.
3) Profit!
No hidden fees.
Granted, I haven't had a package get stolen or damaged in transit, so I haven't tested PS's claims process. But, I don't worry about it. With what I've saved vs. retail shipping rates, I am far ahead, regardless.
If you are shipping a high-value item, it may be worth paying the higher rate to ship directly with UPS/FedEx/whoever. Then they are on the hook and have to answer to you. For the sub-$100 stuff I'm typically dealing with, no way.
One further tip: sign up for USPS Informed Delivery, and you can get your outgoing USPS shipments picked up from your home, at no charge, during your regular mail delivery. I haven't had to physically visit a Post Office to send a package, for years.
I do have to drop off outgoing UPS packages at a UPS location. I will often pay a dollar or two more to send via USPS, to avoid this.
Having stuff picked up from home of course depends on your living situation. If you are in a condo or apartment, I'm not sure how that works. Townhome, duplex, single-family home etc., doorstep pickup may work for you.