My personal list. Most people will disagree. I'm not posting this to get attacked for it, this is how I see it right now. I'm sorry if I offended anybody.
Jade-Kabal 4-6 NDC is troublesome but the glow guide might even make this even.
Jade-Cyrax 6-4 Cyrax has no tools against Jade. He finds it hard to go in, can't zone her.
Jade-Freddy 5-5 Freddy has zoning that stupidly goes through Flash, he has to keep Jade out however.
Jade-Kenshi 4-6 This is another matchup where Jade needs to get in. Proper rushdown Jade with evading Kenshi's bullshit to be discussed.
Jade-KungLao 5-5 His mobility and strings are on his side. But GOD he has to apply himself against a Jade that has him figured out.
Jade-Sonya 4-6 Sonya has to apply herself or gets kept out and shut down. EnCartwheel and divekick is fully negated by Glow.
Jade-Jax 4-6 He again has to rush in and try to deal damage.
Jade-Cage 5-5 He struggles to get in, she struggles to keep him out.
Jade-Kitana 5.5-4.5 Jade has slight advantage here but not too much.
Jade-Reptile 4-6 Jade has definite advantage. Reptile's footsies are ass, his damage is equal to Jade and his zoning is null. He's shut down right where Jade excels: outside sweep.
Jade-Skarlet 5-5 Skarlet's rushdown game is inferior to NDC. Skarlet's armor options are overpowered by Jade's but her normals are better.
Jade-Smoke 5-5 He has good options, while Jade has raw speed and lots of armor. This matchup is really a mindgame.
Jade-Ermac 4-6 Ermac shuts down her spacing a bit like Kenshi does. She has to get in and jump hoops to get this matchup done, but it's just a minor setback in her ever-changing game.
Jade-LiuKang 6.5-3.5 Liu has to apply himself horribly hard to get in. By the time he gets in, he has gone through a breaker, and has three instances of glow to contend with.
Jade-Raiden 5-5 Jade can punish everything Raiden can do, and she can glow through his strings. His teleport makes it hard to put him in a vice however.
Jade-Rain 7-3 Rain's tools are inferior to Jade. All Jade has to do is backstep and wait for the armor to wear off for a b2 and full combo. His teleport is punished for 30+ % as well as his projectile. His lightning doesn't get ignored by Flash for some stupid reason but that's a non-issue, every move of Jade that shifts her hitbox, negates lightning, n4 especially good. Jade has no reason to spend meter on anything but glow.
Jade-Shang 7-3 Shang has absolutely nothing going for him in this matchup. In the event that the shang player knows Jade at the Jade player's level, damage boost can be a minor problem... but even then you can just turtle it out.
Jade-Sektor 4-6 Sektors tools make it incredibly hard for Jade to make a stand. She's free to his teleport from afar and to his superior frames upclose. Right now this is Jade's hardest matchup next to Kenshi in my opinion.
Jade-Mileena 6-4 Mileena is all figured out and she has nothing going for her in this matchup, except for how Jade has to tread lightly not to get blown up out of her unsafe strings by Mileena's superior speed. That accomplished, this matchup is cake.
Jade-Nightwolf 5-5 Hard to get in on nightwolf and his lightning is yet again not negated by Flash. Wtf.
Jade-NoobSaibot 7-3 Nuff said. He has nothing he can do. Jade's 12~options shut him down upclose, and he has no business zoning her. Upknee is a good way to keep her out... unless she has meter.
Jade-QuanChi - 5-5. His frametraps hurt, but that's all he has going for him.
Jade-Sindel 6-4 This matchup is hard for Sindel.
Jade-Scorpion 5-5 His vortex is a pain, but so is her glow into 40% damage.
Jade-SubZero 6-4 He has one superior string and that's all he has going for him. Jade has no reason to get in on Sub in this matchup and if she has to, there are three ways to armor through.
The rest of the cast are all 6-4 or lower.
Jade is solid mid-tier but she takes way too much effort to get right with having several, more competent characters in the cast that do not need to justframe or watch out for making mistakes all that much.