From what I recall, these companies don't offer any option to opt out of your session transcript data being used (and sold!) for "regular" adtech targeting purposes.
Anthropic explicitly state that they don't do this, even if you use the free plan and even if you don't opt-out of letting them use your data for training:
Anthropic explicitly state that they don't do this, even if you use the free plan and even if you don't opt-out of letting them use your data for training:
"We do not sell users’ data to third parties."
https://www.anthropic.com/news/updates-to-our-consumer-terms