Where they differ
Both use AI models. The difference is where you meet them and what they do when you are not asking.
| ChatGPT | May | |
|---|---|---|
| Where you message | ChatGPT app and web | Zalo, Telegram, Discord, Slack |
| Where it runs | OpenAI’s servers | Your own always-on VPS |
| Memory | Yes | Yes, and forgets when asked |
| Messages you on schedule | Has scheduled tasks | Yes, in your chat app |
| How you pay | Free or subscription | VPS by the hour in VND, AI within a daily limit |
Each May runs on its own VPS in Ho Chi Minh City, so it keeps working after your phone and laptop are off. Only you can message your May.
Use both
ChatGPT suits open-ended questions, writing and working with images and voice. May suits the daily jobs you do not want to forget, inside the chat app you already live in.

