Privacy.
Asteroid is open-source, we just listen to user commands or messages starting with '/' in the telegram group or the personal chat.
Searching.
Asteroid can search for a query, keywords on the Internet which is mainly powered by Wikipedia and Google search.
Text to audio.
Asteroid can translate text input into an audio file in a moment.
Fast.
Asteroid responds in over 1 second typically to any message or commands you send to the bot.
Filters Hate-speech.
Bot just listens to commands, however, if you like to filter abusive/hate speech in you're Telegram group then you'll need to promote it to do so. The bot knows more than 1000+ abusive words.
Fun.
One of the reasons you should consider adding it because the bot is fun to use, especially in tech-related groups; searching for something useful on the Internet.
The Asteroid Project.
Asteroid is an open-source and non-profit project developed and maintained by ColorCubes; Fell free to use it.