What are you guys using for kydex mag pouches?

I use JM custom and mastermind tactics mag carriers.

I should have specified OWB, I carry IWB, but don't want anything else in my pants. I have been carrying  CompTac and G-code mag pouches, but find they print more than my actual gun.

I borrowed a friend's Bravo concealment, and like it, but they seem to be prejudiced against lefties.

Kytex brand carriers are very popular and for good reason.
I have several for a variety of pistols.

https://www.kytexgear.com/products-page/pistol-mag-carriers/

These are my preferred choice as well and I now have almost a dozen for various handguns.  These are them most svelte and secure I've used; excellent Kydex mag carriers.

ROCK6

IBX Tactical. With the pancake wings, holds very close to the body.

Used to be Bravo, but like you mention, they now left us lefties in the dust. Does Raven still do left handed stuff? I prefer the Raven/Bravo style of OWB kydex mag pouch with wings.

They seem to be in a weird transition phase. Clearing out some of their old stuff, but they don't have much in the way of new stock to replace the old stuff.

Their old style mag carriers were out of stock for Glock mags. They have a new "one size fits most" carrier that just looked cheap to me, but was priced in line with Raven stuff, and I'm not willing to pay Raven prices for "one size fits most".

I ended up buying one of their Hackathron signature series mag carriers since it was the only thing in stock that fit my needs. It was about double what I wanted to spend though.

Running Raven OWB mag carriers.  Friend of mine is left handed and he runs the same mag carriers.  Told me his were right handed when he bought them, but he just carefully heated the Kydex up and bent them back the other way.  I do not know how the heat will effect the Kydex but so far they are working for him.  YMMV