SparkPost Deliver your app and website emails on time and to the inbox. Trusted to send 25% of the world’s non-spam email. Email delivery for companies big and small. October 4, 2017 Pradeep Palani The world’s most powerful developer-friendly email delivery solution. Painless SMTP & API Integration for Developers at Companies of All Sizes. Build email into any app with SparkPost’s killer email API. Push real-time activity with webhooks.