Many of the ketogenic options are attempting to really go above and beyond their non-ketogenic counterparts. I’m assuming you’re in North America, so will exclude the options that don’t ship there - my personal favourite of those that do, in terms of nutrition, are as follows:
Keto Fuel - probably takes my #1 spot. They use an optimised micronutrients mix which they’re constantly working on, and are in the process of sorting out a deal with a supplier of a keto-friendly MCT oil powder, which uses gum Arabic as the drying agent. Axcho (who runs the company) is also kind enough to have linked other keto soylent competitors to this oil powder, and the other two I’ll recommend here are, I believe, intending to use it in their recipes too. Keto Fuel is also hypoallergenic. You add oil to it to customise your caloric intake.,
Primalkind - based in Australia, and more expensive, but your only real option for a paleo, ketogenic option. They use macadamia nut meal to boost the calories up higher, I believe to 2000, though I haven’t checked in a while. They also have specific male and female blends, though you can, of course, pick whichever suits you best.
Ketochow - very similar to Keto Fuel. Both developed their micronutrient mixed together, so the doses of them all are the same (or close to it), but I prefer the forms the micronutrients are in in Keto Fuel. Ketochow comes in the widest variety of flavours, and also has an open source recipe on the DIY soylent website. Again, you add either oil or heavy cream to customise your caloric intake.
You can also get KetoOne, The Keto Meal Shake, Ketolent or Biolent Keto, but I believe the three I detailed have a slight edge on these. I also make a ketogenic soylent, which I’d rank just slightly higher than the three I detailed (of course I would, I have a bias), but we only ship within the EU currently.