Average Ratings 0 Ratings

Total
ease
features
design
support

No User Reviews. Be the first to provide a review:

Write a Review

Average Ratings 4 Ratings

Total
ease
features
design
support

Description

Experience secure and private email, calendars, and additional features, all at no cost and utilizing Free & Open Source Software (FOSS). We prioritize open standards and formats for every aspect of storage and communication, ensuring no vendor lock-in occurs. Your data is kept secure under Swiss jurisdiction, and will never be shared with third parties without your explicit permission. Our services comply with GDPR, HIPAA, and PCI regulations, and are built with security as a top priority from the very beginning. We offer perfect forward secrecy (PFS) and provide end-to-end encryption options, with no back doors present. Our comprehensive documentation addresses many commonly asked questions and more. If you're in search of an immediate answer or a swift solution, our Knowledgebase is an excellent resource. For any inquiries or issues that remain unresolved in the documentation, you can always reach out to our support team for assistance. We are committed to ensuring your experience is both safe and satisfactory.

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.

API Access

Has API No 

API Access

Has API Yes 

Screenshots View All

Screenshots View All

Integrations

Ongage No 
Postmastery No 
Prometheus No 

Integrations

Ongage Yes 
Postmastery Yes 
Prometheus Yes 

Pricing Details

$9.90 per month
Free Trial Yes 
Free Version 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 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises Yes 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux Yes 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours Yes 
Live Rep (24/7) Yes 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs Yes 
Webinars Yes 
Live Training (Online) Yes 
In Person Yes 

Vendor Details

Company Name

Apheleia IT AG

Country

Switzerland

Website

kolabnow.com

Vendor Details

Company Name

Kumo Corp

Founded

2023

Country

United States

Website

kumomta.com

Product Features

Calendar

Calendar Sync No 
Collaboration Tools No 
Multi-Device Support No 
Reminders No 
Room Booking No 
Scheduling No 
Task Manaagement No 

Collaboration

Brainstorming No 
Calendar Management No 
Chat / Messaging No 
Contact Management No 
Content Management No 
Document Management No 
Project Management No 
Real Time Editing No 
Task Management No 
Version Control No 
Video Conferencing No 

Email Management

Data Recovery No 
Email Archiving No 
Email Deletion No 
Email Discovery No 
Email Monitoring No 
Email Recall No 
Queue Manager No 
Response Management No 
Routing No 
Shared Inboxes No 
Signature Management No 
Spam Blocker No 
Whitelisting / Blacklisting No 

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 

Alternatives

Alternatives

Proton Mail Reviews

Proton Mail

Proton AG
PowerMTA Reviews

PowerMTA

Bird