Gmass
GMass is a Gmail-based email marketing and cold outreach platform delivered primarily via a Chrome extension that enables mail merges with Google Sheets, automated follow-ups, deliverability tools, and integrations (SMTP, API, webhooks, Zapier) for professional email campaigns.
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Quick Overview
Best for: Marketing
What it does
Marketing software for decision-makers comparing workflow fit and alternatives.
Best fit
Marketing
Pricing snapshot
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GMass turns Gmail into an email marketing and cold-email platform via a Chrome extension and complementary services. It is built for marketers, sales teams, recruiters, organizations and anyone who needs to send personalized mass emails from Gmail, supporting mail merge personalization with Google Sheets, automated follow-ups, campaign analytics, deliverability tooling, and SMTP/REST API integrations.
GMass combines a Chrome extension (Add to Gmail) with a suite of deliverability and verification tools (Email Verifier, Email Tester, SMTP Tester), an SMTP service, and APIs/webhooks to enable professional-grade mass emailing while monitoring opens, clicks, replies, bounces, and other campaign metrics.
GMass is a Gmail-based email marketing and cold outreach platform delivered primarily via a Chrome extension that enables mail merges with Google Sheets, automated follow-ups, deliverability tools, and integrations (SMTP, API, webhooks, Zapier) for professional email campaigns.
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Claim this listing for $29Key Features
Mail Merge with Google Sheets
Read merge fields live from Google Sheets and auto-send emails to new rows; supports personalization with any sheet column and fallback values.
Automatic Follow-up Emails
Configure sequences of automatic follow-ups that continue until a recipient replies; supports unlimited auto follow-up stages.
Deliverability & Testing Tools
Email Tester checks SPF, DKIM, DMARC, blacklistings; Real-time SPF checks and tools to monitor where emails land (Inbox, Spam, Promotions).
SMTP Integration & SMTP Service
Use third-party SMTP servers or GMass's ColdSMTP sending server to exceed Gmail's native sending limits; add multiple SMTP servers and select which to use.
Campaign Analytics & Reporting
Campaign-level reports showing opens, clicks, replies and bounces with sharable reports and domain statistics.
Reply & Unsubscribe Management
Automatic categorization of replies and bounces to prevent inbox clutter, plus unsubscribe management across teams.
AI Features
AI-powered features include SpinMax automatic spintax, AI template builder for HTML layouts, Spam Solver suggestions, and ChatGPT campaign writing.
Behavioral & Segmented Campaigns
Send to segments based on prior campaign behavior (opens, clicks) and send campaigns as replies or to segments of previous campaigns.
Templates & AB Testing
Create and manage templates saved from sent emails and run A/B tests with automatic winner deployment.
Automation & Scheduling
Schedule mail merges for future times, repeat sends, set daily end times, and monitor sending speed in real time.
Integrations & API
REST API, webhooks and Zapier support to connect external apps to GMass.
Pricing
Current pricing details are not available from the vendor source.
Use Cases
Cold Email Outreach
Send and automate cold email sequences from Gmail to drive sales and recruit leads.
Marketing Newsletters & Announcements
Deliver personalized mass newsletters and announcements from a Gmail account with analytics and deliverability tools.
Membership & Community Outreach
Keep members informed, manage membership outreach, and handle event or membership communications.
Press & Media Outreach
Manage press release campaigns and media outreach with templates, tracking, and follow-ups.
Transactional & Confirmation Emails
Send transactional emails (confirmations, receipts) through Gmail or via integrated SMTP/ColdSMTP service.
Internal Communications
Send mass emails to teams or organizations such as schools, churches, HOAs, sports clubs, and more.
Link Building & SEO Outreach
Scale backlink outreach and link-building campaigns with personalization and follow-ups.
Integrations
Google Sheets
Live mail-merge data source; GMass reads columns and can monitor new rows to auto-send emails.
SMTP providers / ColdSMTP
Use third-party SMTP servers or GMass’s ColdSMTP sending server to send large volumes and bypass Gmail limits.
REST API, Webhooks, Zapier
Programmatic integrations to connect external apps and automate workflows with GMass.
Gmail
Works inside Gmail via a Chrome extension to send campaigns from a Gmail account.
Benefits
Limitations
Frequently Asked Questions
No verified FAQs are available.
Getting Started
- 1 Step 1: Install the GMass Chrome extension (Add to Gmail) — GMass requires Chrome.
- 2 Step 2: Connect a Google Sheet or prepare your recipient list (or build a list from Gmail searches).
- 3 Step 3: Compose your message in Gmail, configure mail merge fields, scheduling, and follow-ups, then send or schedule the campaign.
Support
Docs & Help Center
Support resources and documentation accessible from the GMass website (Support / Get support links).
Reviews & Community
User reviews and community feedback available via the Reviews tab on the site.
API
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