Flute is the email API designed by folks who care about DevOps, SRE, and email industry best practices. We guarantee you'll see better deliverability and engagement, or you get your money back.
Our secret sauce is a combination of highly isolated segmentation, dynamic FROM replacement, provider A/B testing, and Smart Failover. So you can ensure your email reaches the inbox, not the spam folder.
The Flute Deliverability Guarantee: If you don't see at least a 1% improvement in your overall deliverability rate after integrating Flute, we'll refund your money, no questions asked. Read more.
Deliverability tech developed at the University of Toronto. Read the first official whitepaper.