If you’re okay with a bit of a learning curve, Telethon is a great option. It’s a Python library for Telegram, and you can use it to build your own channel message scraper.
It’s free and super powerful, but you’ll need to write some code. There are tons of tutorials online though, so it’s not too bad.
It’s free and super powerful, but you’ll need to write some code. There are tons of tutorials online though, so it’s not too bad.