I think you will struggle to find a "legit company" that will test blind samples of drugs sent in from all over the world at a low cost with full anonymity using commercial grade lab equipment in an iso-certified operation and accept payment in crypto. Please share your findings when you come across this.
Simec doesn't accept blind samples from anonymous customers. Would you really send drugs that you obtained illegally to them using your full name and pay with traceable means?
Let's take a step back here... you do realise that most steroids are produced and/or sold and/or used illegally? I certainly don't have prescription for my Tren and buy it in a real pharmacy and have it injected by a doctor. Since we agree that most of us act on the wrong side of the law, there's a limit to how "legit" testing service you can expect.
@janoshik has done more tests than anyone, but he's not the only one.
@LAB4TOX provide similar service, and others come and go.
If you want to do the community a great service, blindly send your sample to both of them and post both results. Let's see if they arrive at same result and matches vendor's claim. Since Mactropin pretty much refund your cost, it's free of charge to you, just a bit of hassle.