Shortwaver here! There are a number of other companies that have started out exclusively on Gmail like us. It's also a risk to stand up a new SMTP service while

Shortwaver here! There are a number of other companies that have started out exclusively on Gmail like us. It's also a risk to stand up a new SMTP service while trying to stay off SMTP blacklists, greylists, and keeping mail out of spam filters. Building on Gmail has allowed us to prove out our product market fit more quickly without spending as much time on getting these deliverability issues solved. However, in the future we'd love to have our own SMTP service as an option in addition to Gmail.