There are a list of alternate telegram applications, some are listed here:

https://telegram.org/apps
Under the "Unoffical Apps" section.


For Windows 10 users, there's Unigram:
https://github.com/UnigramDev/Unigram

For Linux, there's Telegram messenger CLI:
https://github.com/vysheng/tg

For Android, there's Plus Messenger:
https://play.google.com/store/apps/......telegram.plus

For iOS, there's Nicegram:
https://apps.apple.com/us/app/niceg.....m/id1457369322