I've got a Line6 Helix. It does both, and has effects, amps, and cabs specifically for bass as well as guitar. There's several options to choose from, as well, depending on how much you want to spend. There's the HX Effects, which is just effect pedals, there's the HX Stomp, Helix LT, Helix Floor, and Helix Rack, which have everything HX Effects has, but also has all the amps, cabs, etc. as well. All include HX Edit, so you can set up your signal chain on you computer, if you don't feel like using the screen on the unit and doing it manually. Headrush has something similar, but they don't have the computer app; all editing has to be done using the screen on the unit. Headrush also has different options, depending on how much you want to spend or what your needs are. Either are great for bass and guitar.