What Let's Encrypt's terms say
Let's Encrypt's terms of service and privacy policy have 5 rated points: 0 serious, 0 bad, 2 worth knowing and 3 good. 4 apply whenever you use the site, signed in or not; 1 only once you have an account.
Whenever you use Let's Encrypt
Worth knowing 2
This service gives your personal data to third parties involved in its operation
This service can share your personal information to third parties
Where it says this ↗Your IP address is collected, which can be used to view your approximate location
Good 2
The service will try to inform and/or notify you regarding government inquiries that may involve your personal information
The service promises to inform and/or notify users regarding government inquiries that may involve users' personal data
Where it says this ↗A complaint mechanism is provided for the handling of personal data
Created by Docbot version v3
Where it says this ↗
If you have a Let's Encrypt account
Good 1
You can opt out of receiving promotional communications
You can opt out of promotional communications
Created by Docbot version v3
Where it says this ↗
The documents
Ratings by ToS;DR volunteers; they can lag behind the current terms. Not legal advice.