To the best of my knowledge all poses currently available are made using Sims 4 Studio. Studio's pose making feature underwent extensive community testing. Also, we have a forum available where people can post to report any issues they notice with custom content made using Sims 4 Studio and there have been no reports that poses cause problems in the game.
Comments
http://mysims4blog.blogspot.com/search/label/Poses
http://forums.thesims.com/en_US/discussion/817478/hello-come-and-introduce-yourself
http://tinyurl.com/OneRoomOneWeek
http://tinyurl.com/rosemow
My Showcase thread https://forums.thesims.com/en_US/discussion/948861/rosemow-s-rooms-showcase
http://lilosims.tumblr.com/post/108355643857/sims-4-poses-female-poses-01-cas-ver
http://sakura-phan.tumblr.com/post/111073571008/happy-late-valentine-i-love-you-guys-so-much-for
http://sssvitlans.tumblr.com/post/110435502289/mtndewduhh-lots-of-poses-they-take-the-place-of
Happy simming.