Average Ratings 4 Ratings
Average Ratings 0 Ratings
Description
KumoMTA is an open source mail transfer agent and email infrastructure platform for enterprises, MailOps teams, and high-volume senders. The platform is built to provide the control, scalability, transparency, and continuity that organizations need when email delivery is central to their business. KumoMTA is positioned as an alternative to commercially licensed MTA providers that may create pricing shocks, renewal risk, vendor dependency, or black-box infrastructure limitations. The platform can deliver tens of millions of messages per hour on a single instance and is designed to support large-scale sending without data loss. Its open source model gives teams direct access to the code and more authority over deployment, operations, and long-term infrastructure decisions. KumoMTA also emphasizes performance, resilience, cost predictability, fairness, and transparent stewardship. The community includes developers, security researchers, and enterprises that help audit code, identify vulnerabilities, and improve the platform over time. KumoMTA provides extensive documentation, a community forum, GitHub repository, migration resources, and support options for teams moving from other MTA platforms. By combining open source email infrastructure, high-volume performance, operational control, community development, documentation, and enterprise support, KumoMTA helps organizations invest in their own email infrastructure with greater confidence.
Description
OpenSMTPD serves as a free implementation of the SMTP protocol for server-side email communication, as laid out in RFC 5321, and incorporates several additional standard extensions. This software enables standard machines to facilitate email exchanges with other systems that also utilize the SMTP protocol. Born from a desire for a more satisfactory alternative to existing solutions, OpenSMTPD offers a comprehensive SMTP implementation. The project is mainly driven by developers Gilles Chehade and Eric Faurot, alongside contributions from numerous OpenBSD developers and collaborators from various other communities. Its development reflects a commitment to improving email server functionality and reliability across different platforms.
API Access
Has API
Yes
API Access
Has API
No
Integrations
Ongage
No
Postmastery
No
Prometheus
No
Pricing Details
$0
KumoMTA is Open-Source and free to use, those interested in support and services can contact us.
Free Trial
Yes
Free Version
Yes
Pricing Details
Free
Free Trial
No
Free Version
Yes
Deployment
Web-Based
Yes
On-Premises
Yes
iPhone App
No
iPad App
No
Android App
No
Windows
No
Mac
No
Linux
Yes
Chromebook
No
Deployment
Web-Based
No
On-Premises
No
iPhone App
No
iPad App
No
Android App
No
Windows
No
Mac
Yes
Linux
Yes
Chromebook
No
Customer Support
Business Hours
Yes
Live Rep (24/7)
Yes
Online Support
Yes
Customer Support
Business Hours
No
Live Rep (24/7)
No
Online Support
Yes
Types of Training
Training Docs
Yes
Webinars
Yes
Live Training (Online)
Yes
In Person
Yes
Types of Training
Training Docs
Yes
Webinars
No
Live Training (Online)
No
In Person
No
Vendor Details
Company Name
Kumo Corp
Founded
2023
Country
United States
Website
kumomta.com
Vendor Details
Company Name
OpenSMTPD
Website
www.opensmtpd.org
Product Features
Email Management
Data Recovery
No
Email Archiving
Yes
Email Deletion
No
Email Discovery
No
Email Monitoring
Yes
Email Recall
No
Queue Manager
Yes
Response Management
No
Routing
Yes
Shared Inboxes
No
Signature Management
No
Spam Blocker
No
Whitelisting / Blacklisting
Yes