Crow.app - Pricing and experimentation tools for Stripe
SendWithUs - Take control of your transactional email. sendwithus is the missing tool for marketers to manage and optimize transactional emails.
Mailgun - A set of powerful APIs that enable you to send, receive and track email from your app effortlessly whether you use Python, Ruby, PHP, C#, Node.js or Java.
RealTime Email - RealTime Email provides email relevance by enabling marketers to respond to each recipient’s personal context.
Stripe for Gmail - Display customers Stripe information within inbound emails
Amazon SES - Scale your business email & marketing messages with Amazon Simple Email Service (SES), a cost-effective and reliable cloud email service. Sign up today.