Duobox OnMail

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Duobox:

About

Duobox is hosted business email for small teams that want to use addresses on their own domain. It provides personal and shared inboxes such as sales@, support@ and billing@, with shared message history and access for multiple team members. Users can connect a domain they already own or register one through Duobox, then create inboxes, aliases and forwarding rules. The service includes up to 10 inboxes of 50 GB each per person and supports additional domains. Teams can access mail in a web browser or configure a phone's mail app. Duobox also offers an MCP connection for clients such as ChatGPT, Claude and Cursor, using OAuth and configurable permissions to read mail, save drafts, send messages, or manage the team, plan and inboxes. A free tier includes one person, one inbox, one domain and 10 GB; additional people cost $2 per month each.
OnMail:

About

OnMail has been engineered to solve the core areas of email that are broken today. Control has been taken away from you, ad targeting has grown into an invasive norm, most email addresses that actually represent your digital identity are unavailable, and simplicity has given way to overly complicated actions in the inbox. OnMail offers a first-of-its-kind permission-based inbox, along with cool new abilities like superior search based on natural language recognition and a unique import account system that modernizes your existing email accounts in OnMail. You can send large attachments, save time with AI-based suggestions to unsubscribe, follow up on email, and perform automated inbox cleanup. OnMail’s premium service plans even uniquely allow you to acquire and integrate your own custom domain into a personalized email address. OnMail’s creators at Edison provide ecommerce research to businesses in the form of Edison Trends.
Duobox:

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported
OnMail:

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Supported
iPad Supported
Android Not Supported
Chromebook Not Supported
Duobox:

Audience

Small companies and teams that want email on their own domain, with shared inboxes like sales@ and support@, and teams that want their AI agent to work in that inbox.
OnMail:

Audience

Anyone requiring a solution to reduce email spam in their inbox
Duobox:

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported
OnMail:

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported
Duobox:

API

Offers API Supported
OnMail:

API

Offers API Not Supported
Duobox:

Screenshots and Videos

No images available
OnMail:

Screenshots and Videos

Duobox:

Pricing

$2/person/month
Free for one person, one inbox, one domain and 10 GB, with no card required. Paid access is $2 per added person per month in US dollars, with no contract; each person can have up to 10 inboxes of 50 GB each. The first domain is included; each additional domain costs $5 per month for hosting, and domain registration is charged separately by the registrar.
Free Version Supported
Free Trial Not Supported
OnMail:

Pricing

Free
Free Version Supported
Free Trial Not Supported
Duobox:

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software
OnMail:

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software
Duobox:

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported
OnMail:

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported
Duobox:

Company Information

Duobox
Founded: 2026
Argentina
duobox.io/en
OnMail:

Company Information

OnMail
Founded: 2011
United States
www.onmail.com
Duobox:

Alternatives

No Alternatives
OnMail:

Alternatives

OnMail:
OnMail:
QQmail

QQmail

Tencent
OnMail:
StartMail

StartMail

4.0 out of 5 stars
Duobox:
OnMail:
500Mail by 500apps

500Mail by 500apps

500apps
5.0 out of 5 stars
Duobox:

Categories

Email Hosting Supported
OnMail:

Categories

Email Hosting Supported
Duobox:

Integrations

ChatGPT Supported
Claude Code Supported
Cursor Supported
Edison Mail Not Supported
Model Context Protocol (MCP) Supported
OnMail:

Integrations

ChatGPT Not Supported
Claude Code Not Supported
Cursor Not Supported
Edison Mail Supported
Model Context Protocol (MCP) Not Supported
Duobox:
Claim Duobox and update features and information
Claim Duobox and update features and information
OnMail:
Claim OnMail and update features and information
Claim OnMail and update features and information