What 3rd Party SMS service do folks use for sending mass / bulk texts to their clients?

I've been using Chiirp - It's ok. It's $350/month and it has a lot of capability but it's also really hard to set automations up and sometimes even their tech support can't figure it out. They have a "done for you" option but that takes a long time to get meetings with their people and you can just do it on your own by calling support. I'm actually switching to a Go High Level mod called snipey leads. It's almost the same capabilities of chiirp but way easier to use. Check back with me in a month haha.