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GMass

Easiest way to send an email campaign·gmass.co

GMass is a Gmail-based tool for sending mass emails, mail merge campaigns, newsletters, cold email outreach, and transactional email directly from a Gmail account. It is installed as a Chrome extension and adds personalization, scheduling, automatic follow-up sequences, campaign analytics, reply/bounce/unsubscribe management, and A/B testing to Gmail. It also provides an SMTP sending service and a REST API with Zapier support for connecting to other apps, plus free tools for email verification and deliverability testing.

What it's for

Cold email outreachLink building outreachMembership outreachRecruiting communicationsPress release distributionPolitical campaign outreachWedding invitation announcementsChurch mass emailsHOA resident communicationsTeacher-student communicationsReal estate listing promotionInternal team communicationsSports club announcementsSelling beats (music promotion)Sending newslettersSending transactional emails (order confirmations, password resets)Mail merge personalization at scale

Features 20

A/B testing with auto-deploy of the winning variation
Automatic bounce detection and suppression
Automatic follow-up email sequences
Automatic unsubscribe management
Breaks past Gmail's native sending limits via proprietary tech
Email list builder by searching a Gmail account
Email polling (one-question surveys in campaigns)
Personalization at scale via mail merge and conditional logic
Pre-send email verification to avoid bounces
Reads merge fields and auto-sends emails to new Google Sheets rows
Reply management without inbox clutter
REST API, webhooks, and Zapier connectivity
Reusable templates from sent emails
Scheduling and recurring campaign sends
Segmented campaigns to a subset of a prior campaign's recipients
Send mail merge and cold email campaigns from inside Gmail
Send new campaigns as replies to prior messages
Sharable campaign analytics reports (opens, clicks, replies)
Third-party SMTP integration for higher sending limits
Transactional email sending through Gmail

At a glance

free trialAPI

TypeBrowser extension

DeploymentCloud

PlatformsWeb

Integrations

Google SheetsZapierChatGPTGmail

Resources

Pricing

All plans include unlimited emails, contacts, and campaigns. Prices shown are in USD; a detailed pricing table with every team size and billing option is available separately. Breaking Gmail's sending limits depends on individual account configuration.

Standard$29.95/mo

Individual plan; monthly-billed price is $29.95, annual-billed price is $20/month ($249 billed yearly).

Unlimited emails, contacts, and campaigns; no API access, A/B testing, Triggered Emails, Inbox Rotation, or high-priority support

Premium$39.95/mo

Marked 'Most popular'. Individual plan; monthly-billed price is $39.95, annual-billed price is $29/month ($349 billed yearly).

Adds API access, A/B testing, Triggered Emails, and Inbox Rotation (MultiSend) over Standard

Professional$59.95/mo

Individual plan; monthly-billed price is $59.95, annual-billed price is $49/month ($599 billed yearly).

Adds high-priority support and email support over Premium

Team Premium (5 users)$175/mo

Team pricing tier for 5 users; monthly-billed $175, annual-billed $145/month ($1750 billed yearly).

Team plan sized for 5 users

Team Premium (10 users)$295/mo

Team pricing tier for 10 users; monthly-billed $295, annual-billed $245/month ($2950 billed yearly).

Team plan sized for 10 users

Team Premium (25 users)$725/mo

Team pricing tier for 25 users; monthly-billed $725, annual-billed $604/month ($7250 billed yearly).

Team plan sized for 25 users

Team Premium (50 users)$1350/mo

Team pricing tier for 50 users; monthly-billed $1350, annual-billed $1125/month ($13500 billed yearly).

Team plan sized for 50 users

Team Premium (100 users)$2200/mo

Team pricing tier for 100 users; monthly-billed $2200, annual-billed $1833/month ($22000 billed yearly).

Team plan sized for 100 users