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What is KumoMTA?

KumoMTA is an open source email infrastructure platform designed for enterprises, email service providers, and high-volume senders that need scalable, transparent, and controllable MTA technology. The platform is built for organizations that want to own their email sending infrastructure rather than depend on closed commercial systems. KumoMTA emphasizes performance, with the ability to send tens of millions of messages per hour on a single instance. It is designed to provide the scalability and resilience needed for large-scale email operations without sacrificing visibility or control. Because the platform is open source, teams can inspect the code, understand how the system works, and maintain authority over their deployment. KumoMTA is positioned around long-term stability, cost predictability, fair pricing, operational control, and reduced exposure to vendor lock-in or surprise renewal changes. The platform is supported by a growing community of developers, security researchers, enterprises, and MailOps professionals who contribute to innovation, auditing, vulnerability identification, and ongoing improvement. KumoMTA provides extensive documentation, community resources, a GitHub repository, migration guidance, and support options for teams evaluating or replacing existing MTA infrastructure. Its resources include migration information for platforms such as Hurricane MTA, Momentum, PowerMTA, and SendGrid. The platform is built for teams that need confidence in their email architecture, predictable infrastructure decisions, and the ability to send at massive scale. By combining open source MTA technology, high-volume delivery, code transparency, community stewardship, enterprise support, documentation, and migration resources, KumoMTA helps organizations modernize email infrastructure while keeping control of their operations.

What is Hermes SEG?

Hermes SEG serves as a free and open-source secure email gateway and server that provides strong defense against spam, viruses, and malware through integrated tools like SpamAssassin, ClamAV, and Amavisd-new. It guarantees full encryption for both data in transit and at rest by employing protocols such as SMTP TLS, S/MIME, PGP, and encrypted PDF via CipherMail, coupled with Dovecot mail-crypt for added security. The platform also includes email archiving capabilities and integrated mailbox hosting, featuring functionalities like quotas, aliases, shared folders, Sieve rules, vacation replies, and mobile auto-configuration options. Users can enhance their collaboration through Nextcloud, which offers a suite of features including webmail, file synchronization, calendars, and contacts management. Identity and access management is made efficient with OpenLDAP and Authelia, supporting single sign-on (SSO) and multi-factor authentication (MFA) through methods like TOTP, WebAuthn, and Duo. Furthermore, it complies with modern authentication protocols such as SPF, DKIM, DMARC, and ARC, thereby ensuring a secure email environment. With its wide array of features, Hermes SEG emerges as a holistic solution for ensuring secure email communication while promoting seamless user interaction. Ultimately, its commitment to security and user accessibility makes it an ideal choice for those seeking a reliable email solution.

Media

Media

Integrations Supported

Ongage
Postmastery
Prometheus

Integrations Supported

Ongage
Postmastery
Prometheus

API Availability

Has API

API Availability

Has API

Pricing Information

$0
KumoMTA is Open-Source and free to use, those interested in support and services can contact us.
Free Version
Free Trial Offered?

Pricing Information

$0/month/user
Free Version
Free Trial Offered?

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Kumo Corp

Date Founded

2023

Company Location

United States

Company Website

kumomta.com

Company Facts

Organization Name

Black Fish Networks LLC

Company Location

United States

Company Website

www.hermesseg.io

Categories and Features

Email Management

Data Recovery
Email Archiving
Email Deletion
Email Discovery
Email Monitoring
Email Recall
Queue Manager
Response Management
Routing
Shared Inboxes
Signature Management
Spam Blocker
Whitelisting / Blacklisting

Categories and Features

Secure Email Gateway

Anti-Malware
Archiving
Customizable
Data Loss Prevention
End-to-End Encryption
Real-time Dashboards
Reporting / Analytics
Sandbox
Threat Protection

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