What a bot in your channel actually sees
Broken down by rights: what an admin bot receives, what stays invisible, and what to ask the service.
Before granting admin rights it helps to know what you are handing over. The answer depends on where the bot sits.
In a channel
An admin with posting rights sees: the channel title, the subscriber count and its own published messages. The subscriber list is not available to bots — Telegram does not hand it out.
Comments live in a linked group, where group rules apply.
In a group
With privacy mode off the bot receives every message — otherwise it cannot filter spam. That is how the Bot API works, not a choice by the service.
What the service does with it is a matter of trust. Sensible behaviour: check the message on the fly, store only violations in the log, keep nothing else.
In a private chat
Only what you wrote yourself, plus your identifier, first name and username from the profile. The phone number is not shared until you send it explicitly with a button.
What to ask the service
- Are group messages stored in full, or only violations?
- How long is data kept, and what is deleted on schedule?
- Where is the server physically located?
- How do you delete the account and everything tied to it?
If the answers are not on the site, that is an answer in itself. Ours are on the data and security page.