KumoMTA is the open source email infrastructure for enterprises and high-volume senders who want control and continuity without the risk, volatility, or pricing shocks associated with commercial providers. Brought to you by industry pioneers with over four decades of combined expertise. KumoMTA’s founders built, managed, and supported the global platforms that handle billions of interactions every day.
KumoMTA’s revolutionary new architecture gives you the power to send tens of millions of messages an hour on a single instance, with guaranteed access to the technology and authority over your deployment. It offers powerful features such as Lua scripting, Docker and Kubernetes support, and real-time monitoring through Prometheus and Grafana.
Our community of independent developers, security researchers, and enterprise teams continuously audits the code and identifies vulnerabilities, enabling the KumoMTA ecosystem to rapidly strengthen security, accelerate innovation, and enhance performance. Support and services are available at every level, from community resources and an active user forum to enterprise-grade 24/7 SLA-backed contracts. Customers including AWeber, Puresend, ActiveCampaign, Postmark, Maileroo, and a growing base of ESPs and high-volume enterprise senders who have chosen KumoMTA because they needed infrastructure they could trust on terms they could verify.