Grass seed litter is a Reddit-beloved alternative to clay that clumps better than corn-based litters with virtually zero dust. Smaller bags are available under $10, and it's not a food crop so it won't grow mold like tofu or corn litters.
If you like World's Best, try grass seed litter! Just as lightweight, it much better clumping, and zero dust. Not a food crop, and does not grow fungus that can excrete aflatoxins.
Good brands for grass seed litters are: Pioneer Smart Cat, Frisco Grass Seed (Chewy), SoPhresh Grass Seed (PetCo), ExquisiCat Naturals Grass Seed, etc. I usually shop around for best prices at the time, all these brands seem comparable in quality.
Walmart's exclusive clumping clay litter comes in at $8 for a 14-pound jug, the only major brand that consistently stays under $10. Unscented bentonite clay clumps well enough for multi-cat households.
Farm-store pine pellets run about $8 for 40 lbs, an almost unbeatable cost-per-pound that Reddit cat owners rave about. Naturally neutralizes urine odor and produces almost zero dust or tracking.
Tens of thousands of five-star Amazon reviews back this baking-soda-powered clumping litter that seals odors for days. Frequently goes on sale under $10 for smaller bags, making it the best-performing clumping option at this price point.
Tidy Cats 24/7 is the go-to unscented clumping clay litter that works reliably in both standard and automatic litter boxes. Smaller jugs frequently dip under $10 at Walmart, and it's one of the most widely available budget litters in the US.