I noticed that the BotPress chatbot comes with 1000 free messages before it begins to charge. Is it 1000 free messages for the account as a whole? across all bots? Or is it 1000 free messages for EACH bot ?

If I'm correct, it's for the entire workspace—not your account. So each workspace can have up to 5 bots, all of which use one 1000 free message. It's the same with incoming messages, vector databases, etc. You can check it by going to the workspace -> Usage

It's even 2000 messages ! For each workspace

That's right, I don't know how I could miss it 🙃