Chat
- (Z)-3-hexen-1-ol acetyltransferase
- Ashbyia
- CHAT-FM
- CHAT-TV
- CHILDES
- Chat (bird)
- Chat (magazine)
- Chat (mining)
- Chat (ppp)
- Chat Chat
- Chat Tatars
- Chat room
- Chat room (disambiguation)
- Chat show
- Chat, California
- Chat, Iran
- Chat, Kyrgyzstan
- ChatGPT
- Chatroulette
- Checklist for Autism in Toddlers
- Choline acetyltransferase
- Choosing Healthplans All Together
- Community Hebrew Academy of Toronto
- Conversation
- Cultural-historical activity theory
- Epthianura
- Granatellus
- Instant messaging
- Khat
- Le Chat
- Online chat
- OpenAI
- Sophia "Chat" Sanduval
- Sumbar River
- Synchronous conferencing
- Text messaging
- The Chats
- Video chat
- Yellow-breasted chat