Building an Email Client with Bubble
Can you build an email client with Bubble? Yes, you can build a Bubble app that sends and receives emails using the Gmail API, but there's one thing you should know first. It will cost you at least $15,000.
Google's Security Assessment Requirements
Google requires the highest level scrutiny when accessing information contained in users' emails. In order to use Google's email API on a production app, your app will be subjected to a security assessment that Google states will cost you between $15,000 and $75,000.
Alternative Solutions
It's not all bad news, however. There are services like Nylas that act as a man in the middle API and offer assistance and a guarantee for guiding your app through the security assessment for just the lower fee of $15,000.