Comment by pabs3

I note that if you are using one of the alternative clients (like Pidgin with purple-discord), they can store local logs that you can then index and search. There is also Harmony for managing your account without touching the Discord website. Note that using unofficial Discord clients can get you banned.

https://pidgin.im/ https://github.com/EionRobb/purple-discord/ https://github.com/taylordotfish/harmony/