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Average Ratings 0 Ratings

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features
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support

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Write a Review

Description

Experience a mass email solution integrated within Gmail that achieves unprecedented open rates. Craft cold email campaigns with sequences designed to enhance response rates significantly. Implement mail merge campaigns featuring automatic follow-up messages and seamlessly pull data from Google Sheets instead of outdated CSV files. Send personalized emails as replies within the last conversation thread for each recipient, ensuring a more tailored approach. Effortlessly schedule and monitor your email performance through tracking of opens, clicks, and replies. Enhance your list's deliverability with our integrated verification tool to ensure optimal results. Ditch CSV files and elevate your outreach by connecting directly to Google Sheets, enabling personalized mass emails utilizing any data column from your spreadsheet. Harness Gmail's advanced search functionality to locate messages containing potential recipients, then simply click the Build Email List button to generate a list of email addresses from those conversations. This is the only mass email platform offering such a unique capability! Discover the simplest method for executing cold email sequences within Gmail today. Your outreach will never be the same again.

Description

SubsiMail is a platform for self-hosted cold email sequencing, allowing users to manage prospect lists, templates, connected inboxes, and all campaign-related data directly within their own database rather than relying on a third-party SaaS solution. Designed as an alternative to platforms like Instantly, Smartlead, lemlist, and Apollo, it offers flat pricing based on connected inboxes instead of per-seat charges, ensuring complete ownership and export of data without any content review processes or external access to contacts and campaigns. The application operates seamlessly as a single Docker container on any $5 VPS, enabling users to connect to Gmail, Outlook, or any SMTP/IMAP inbox, create multi-step email sequences that incorporate merge fields and reply detection, manage user roles (admin, manager, view-only) while maintaining a comprehensive audit trail, and utilize integration through a REST API secured by personal API keys. Furthermore, the initial connected mailbox comes with a perpetually free option, making it an attractive choice for individuals and businesses alike. This unique setup empowers users with greater control over their email marketing campaigns while simplifying the management process.

API Access

Has API No 

API Access

Has API No 

Screenshots View All

Screenshots View All

No images available

Integrations

Gmail Yes 
Google Chrome Yes 
Google Sheets Yes 
Google Workspace Yes 
Hyperise Yes 
Microsoft 365 Yes 
Microsoft Outlook No 
Microsoft Word Yes 
Pitchsail Yes 

Integrations

Gmail Yes 
Google Chrome No 
Google Sheets No 
Google Workspace No 
Hyperise No 
Microsoft 365 No 
Microsoft Outlook Yes 
Microsoft Word No 
Pitchsail No 

Pricing Details

$12.95 per month
Price is per Gmail or G Suite account
Free Trial Yes 
Free Version No 

Pricing Details

Free (paid plans from $49/mo)
Free Trial No 
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 No 
On-Premises Yes 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux Yes 
Chromebook No 

Customer Support

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

Customer Support

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

Types of Training

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

Types of Training

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

Vendor Details

Company Name

GMass

Founded

2015

Country

United States

Website

gmass.co

Vendor Details

Company Name

SubsiMail

Founded

2026

Country

India

Website

subsimail.com

Product Features

Email Tracking

A/B Testing No 
Audience Segmentation Yes 
Campaign Management Yes 
Event-Based Notifications Yes 
Location Tracking No 
Team Management Yes 

Email Verification

Bulk Email Verification No 
Catch-all Server Detection No 
Disposable Email Detection No 
Domain Check No 
Mail Server Validation No 
Single Email Verification No 
Spam Trap Detection No 
Syntax Check No 

Sales Engagement

CRM Integration No 
Call Scripts / Call Steps No 
Email Sequences No 
Email Tracking / Automation No 
Lead Management No 
Reporting / Analytics No 
Sales / Voice Dialer No 
Sales Automation No 
Search No 
Task Management No 
Templates No 
Workflow Management No 

Product Features

Email Marketing

A/B Testing No 
Artificial Intelligence No 
Auto-Responders No 
CAN SPAM Compliance No 
Customer Surveys No 
Drip Campaigns No 
Dynamic Content No 
Event Triggered Email No 
Image Library No 
Landing Pages/Web Forms No 
Mailing List Management No 
Mobile Optimized Emails No 
Reporting/Analytics No 
Subscriber Management No 
Template Management No 
WYSIWYG Email Editor No 

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