Cap for utterances per month?

I’m trying to find information on the Voiceflow website stating what the caps are for the free tier of account. I can’t seem to find any information. Can anyone help?

I have a pro account for my workplace and a personal account that’s separate for personal projects - the only limitations I’ve found is for projects themselves. That said, I don’t use the utterance function so I couldn’t tell you about limits on that.