"Export my competitor's subscribers" sounds reasonable and runs into a technical limit that vendors of such services tend not to mention.
The limit
A channel's subscriber list is not available. Not to you, not to a tool, not to anyone but the channel's own administrators — and even they see counts rather than a usable export. This is how the platform is built, not a gap waiting for better software.
Anything sold as "channel subscriber export" is therefore either something else relabelled, or a fabrication.
What can be collected
- Members of groups, including the discussion group attached to a channel. Groups are not channels, and their membership is visible.
- People who commented under posts — a smaller and warmer list: collecting commenters.
- People who talk in topical chats — finding active users.
Why the smaller list is better
A subscriber tapped a button once, possibly years ago, possibly on a channel they no longer read. A commenter engaged with a specific post last week. Even if the full list were available, the second group would convert better.
What to do with a competitor's audience
Not mass messaging. The list overlaps heavily with lists you could collect yourself, the messages read as harvested, and the reports arrive fast — why Telegram restricts accounts.
The durable use is presence: comment where they comment, answer where they ask. See analysing competitors.
What else stays invisible
Private channels, closed chats, and anyone who hid themselves in privacy settings — what parsing can and cannot do.
How Neurogram does this
Everything above is manual work that runs into the number of hours in a day. Neurogram does it on your own accounts and without you: it collects channels and audiences, writes comments and replies with a language model, and keeps limits and quiet hours so the accounts survive. See pricing or look at your case.