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What is SubsiMail?

SubsiMail is a self-hosted platform for cold email sequencing that enables users to oversee their prospect lists, templates, connected inboxes, and all campaign-related information within their own database, eliminating the need for third-party SaaS solutions. Positioned as a viable alternative to services like Instantly, Smartlead, lemlist, and Apollo, it features straightforward pricing based on the number of connected inboxes, rather than charging per seat, thus ensuring users retain full ownership of their data and can export it freely without undergoing any content review processes or external interference with their contacts and campaigns. The application runs efficiently as a single Docker container on an affordable $5 VPS, allowing connections to Gmail, Outlook, or any SMTP/IMAP inbox, enabling the creation of multi-step email sequences that can utilize merge fields and reply detection, while also providing user role management (admin, manager, view-only) with a detailed audit trail. Additionally, integration is facilitated through a REST API that is secured by personal API keys, enhancing the security of user data. Notably, the first connected mailbox is offered with a perpetually free option, making it particularly appealing to both individuals and companies. This innovative configuration not only grants users superior control over their email marketing initiatives but also streamlines the overall management experience, ensuring a more efficient workflow. As a result, SubsiMail stands out as a powerful tool for anyone looking to optimize their email outreach efforts.

What is Dead Simple Email?

Dead Simple Email provides an innovative email API that enables the creation of authentic email inboxes specifically designed for AI agents and automated processes. Users can effortlessly establish an inbox and interact using legitimate email addresses through either REST or standard IMAP/SMTP protocols with a single API call, and they receive responses formatted as structured webhooks. Before delivery, incoming messages are screened for prompt injection, ensuring security and reliability. Additionally, users can monitor all communications for each agent through an accessible dashboard that tracks the entire history of interactions. The service kicks off with a complimentary plan allowing for 5 inboxes, and users have the option to upgrade to 100 inboxes for a monthly fee of $29, emphasizing a pricing model based on the number of inboxes instead of user count. This versatility positions it as an attractive solution for businesses seeking to integrate email capabilities into their automated workflows efficiently. Moreover, the user-friendly interface and comprehensive features make it suitable for a variety of applications across different industries.

Media

No images available

Media

No images available

Integrations Supported

Gmail
Microsoft Outlook
Model Context Protocol (MCP)

Integrations Supported

Gmail
Microsoft Outlook
Model Context Protocol (MCP)

API Availability

Has API

API Availability

Has API

Pricing Information

Free (paid plans from $49/mo)
Free Version
Free Trial Offered?

Pricing Information

$29/month (100 inboxes)
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

SubsiMail

Date Founded

2026

Company Location

India

Company Website

subsimail.com

Company Facts

Organization Name

Dead Simple Email LLC

Date Founded

2026

Company Location

United States

Company Website

deadsimple.email

Categories and Features

Email Marketing

A/B Testing
Artificial Intelligence
Auto-Responders
CAN SPAM Compliance
Customer Surveys
Drip Campaigns
Dynamic Content
Event Triggered Email
Image Library
Landing Pages/Web Forms
Mailing List Management
Mobile Optimized Emails
Reporting/Analytics
Subscriber Management
Template Management
WYSIWYG Email Editor

Categories and Features

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