Honestly, Evomuse's owner brought AY to the market way back when and Alphaburn has always been great.
The other company I would trust is SNS.
I would be very careful to avoid a company I didn't have a lot of trust in, a lot of the AY products have historically been found to actually just be regular Y which is cheaper and has a bunch of side effects that are unpleasant in some people. I personally have a hard time tolerating regular Y, it makes me nauseous, hot and cold sweats, and insomnia that is really unbelievable. Actually, I have taken small doses of Y in situations where I missed a bunch of sleep and then had to do something where I had to stay awake, it is that reliable for me at making it impossible for me to.sleep. AY though, no issues.