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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 Fluxmail?

Fluxmail facilitates the seamless integration of AI agents and software tools with existing email accounts, whether using hosted or self-hosted environments. It supports a wide array of services, such as Gmail, Google Workspace, Microsoft 365, Outlook, Exchange, and various IMAP/SMTP mail servers. After users grant the necessary permissions, they can engage in activities like searching through their inboxes, reading and managing emails, downloading attachments, composing, sending, or forwarding messages, and organizing their mail with labels and folders. This extensive functionality is enabled by an MCP server specifically designed for compatible AI clients, along with a REST API that serves multiple applications and scripts, and a command-line interface that offers additional versatility. Cloud users can authenticate through OAuth, while those who prefer self-hosted setups can configure their systems using npm or Docker, ensuring that their credentials remain securely encrypted on the host. Additionally, permissions for mailboxes and actions are customizable, allowing for configurations such as read-only access. Ultimately, Fluxmail is designed to serve developers, agent creators, and anyone interested in enhancing their email experience with AI support. By leveraging this adaptable tool, users not only optimize their email management but also empower themselves to utilize artificial intelligence for more effective communication in their everyday lives, thus revolutionizing the way they interact with their emails.

Media

No images available

Media

Integrations Supported

Gmail
Microsoft Outlook

Integrations Supported

Gmail
Microsoft Outlook
ChatGPT
Claude
Claude Code
Claude Desktop
Codex CLI
Cursor
Fastmail
Google Workspace
Microsoft 365
Model Context Protocol (MCP)
Yahoo! Mail
iCloud

API Availability

API Availability

Has API

Pricing Information

Free (paid plans from $49/mo)
Free Version

Pricing Information

$15/month
Pro costs $15/month or $120/year for one member and up to 10 mailboxes. Business costs $25/member/month or $240/member/year, with 20 mailboxes per member. Cloud plans include a 7-day free trial. Self-Hosted is free for one member and three mailboxes; paid self-hosted plans offer higher limits.
Free Version
Free Trial Offered?

Supported Platforms

On-Prem
Linux

Supported Platforms

SaaS
Windows
Mac
On-Prem
Linux

Customer Service / Support

Web-Based Support

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub

Company Facts

Organization Name

SubsiMail

Date Founded

2026

Company Location

India

Company Website

subsimail.com

Company Facts

Organization Name

Fluxmail

Company Website

fluxmail.ai

Categories and Features

Cold Email

Not specified

Email Marketing

Not specified

Categories and Features

Email APIs

Not specified

Popular Alternatives

Popular Alternatives

No Alternatives
PureMail Reviews & Ratings

PureMail

PureMail LLC