The Rushbox is a leverless controller that has 18 buttons with low profile Lofree Ghost switches and also comes in a Lite edition.
The LVL is a leverless controller with a hot swappable PCB as well as a built-in slot for an adapter to enhance compatibility options.
The TIKITAKA T16 is a stickless controller with 16 buttons, and its dual layout allows you to use it as a WASD controller as well.
The FightBox K1 can come in white or black as well as K2 & K10 editions that have a joystick and more buttons respectively.
Mayflash decided to enter the stickless market with the F500 FLAT that has two extra buttons for Street Fighter 6 and beyond.
The Granola Summit is an open source PLA Pro controller that has a port for additional console compatibility.
The KBGM-H04 is a dual layout controller with an aluminum alloy top and acrylic bottom. You can also add an extender for your wrists.
The DuelPad A16 is an acrylic controller that has 16 buttons with LED support and even comes with a modern console port.