Do I need to bring by own Email Service Provider (ESP)?

No, you do not need to bring your own ESP. We offer ESP services by default via Sendgrid for any transactional emails at no additional charge. It's one of the benefits of using our service. However, you have the option to use your own ESP if it's either Sendgrid, Mailgun, or Mandrill. Moreover, we now also offer bulk email / marketing blast campaigns as an add-on. This add-on is either $29/month if you are using your own ESP or priced according to send volume if using our service.