Even though crisis hotlines are common, they have not been well studied for efficacy.
Somewhat related, but I think suicide hotlines can be a big problem if they are understaffed. I feel like in my country they are just there to check a box. I’ve had two suicidal crises, both times I called the hotline, waited 20+ minutes and gave up. It made me feel even worse and more lost.
https://searx.bndkt.io/