The HTC One is yet to land in the hands of the common man, but custom recoveries for the device are already available.Xda member Flyhalf205 has posted ClockworkMod and TWRP recoveries for the HTC One.
Please note the bootloader on the HTC One is yet to be unlocked and we do not know if HTC will support that from their portal or not. Only time will tell if the One’s bootloader can be unlocked or not.
Link to CWM for HTC One
Link to TWRP for HTC One