Artificial Intelligence, The category AI & Machine Learning which is the most similar, I'll choose "Artificial Intelligence isn't on the list, however the AI and Machine Learning category is, and it's close enough."

Tech-related category suggests the application is tech - associated. Artificial Intelligence 'u' AI was the request or word that was in the text 'stikers/yuttd. We see its AI counterpart 'ml' not present in ('& machine'). Since 'Machine' is around, one can safely select AI & Machine Learning

Artificial Intelligence

Artificial Intelligence & Machine Learning

Artificial Intelligence & Machine Learning

Data / Artificial Intelligence

Development/Software Practices/Culture like Artificial Intelligence

Artificial intelligence ("Mycelium" is related to mycelium, the fungal network that can be compared to a decentralized network like blockchain, so Category AI & Machine Learning could be reasonably assumed)

Artificial Intelligence

Artificial Intelligence & Machine Learning

Artificial Intelligence (AI) & Machine Learning

Artificial Intelligence Cryptographically secured tools and platforms used to send more secure private messages to other users can make falling under "Security & Hacking" or "Cybersecurity" a highly apt description for the stated business, even though the name is just called "Telegram" security is its strong point.