Is the phone number I buy in Votel mine, and can I port it out?

Yes. A number you buy in Votel is in your account and it is yours, just like a number bought at Twilio or in GoHighLevel. You pay for the texts and minutes you use.

You are free to port numbers in or out at any time, so you are not locked in. Porting out has an approval step, so nobody can port your number out of Votel without your approval.