Has anyone used online therapy such as Talk Space, Breakthrough, Better Help, etc.?

I have used the Better Help free trial offer in the past (and I see that they are a sponsor to this forum), but $200/month is a non-starter for me.

Are there any reputable sites that offer pay as you go (such as a one-time session or maybe pay for a week of unlimited access, etc.) as opposed to a subscription-based service?

The reason I would prefer a service like this over a therapist in my own town is because I am much more comfortable with a private texting/message/emailing platform rather than a face-to-face. I did some sessions in my early teens at my mother's insistence and it was not a pleasant experience. Just lots of silence and "I don't knows" from me at the time because it's extremely hard and embarrassing for me to open up to strangers about my thoughts and feelings.