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About

A mass email service inside of Gmail. Get the highest open rates you've ever seen. Send cold emails with sequences that maximize responses. Send mail merge campaigns with automatic follow-ups. Pull from Google Sheets, not CSV files. Send emails as replies to the last thread with each person. Personalize. Schedule. Track opens, clicks, replies. Validate your list with our built-in verifier to maximize the deliverability. Say goodbye to CSV files. Connect to Google Sheets to send a personalized mass email using any of the columns in your spreadsheet. Use Gmail's powerful search feature to find messages containing recipients to whom you want to email. Then click the Build Email List button, and a Compose window will load containing the email addresses found in those messages. The only mass email service that does this! The easiest way to send cold email sequences in Gmail.

About

Sellvance is a GTM experimentation platform for B2B SaaS teams still searching for product-market fit. Validate an ICP, test an offer, or check demand for a feature by talking to real prospects. Most cold email tools are built for volume. But zero replies can mean nobody wants your product, or that your emails never reached the inbox. Sellvance tells them apart. Every experiment gets a Signal Check: a delivery verdict (did the emails arrive?), an interest verdict (is the positive reply rate above your threshold?) and a harm verdict (unsubscribes). Until delivery is confirmed, Sellvance won't let you judge the reply rate. Includes a 9.5M+ company database, enrichment with AI agents, AI-written messages, in-app domains and mailboxes, deliverability monitoring, and an MCP server to run campaigns from Claude. Free Experiment Plan, no domain or mailbox needed. Paid plans from $199/month.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Professionals interested in a cold/mass email service inside of Gmail

Audience

B2B SaaS companies (1–50 employees), bootstrapped or seed/Series A, still validating their ICP and first acquisition channel. Typical users: founders and early growth leads.

Support

Phone Support Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Not Supported

API

Offers API Not Supported

API

Offers API Not Supported

Screenshots and Videos

Screenshots and Videos

No images available

Pricing

$12.95 per month
Price is per Gmail or G Suite account
Free Version Not Supported
Free Trial Supported

Pricing

$199/month
Free Version Not Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Not Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

GMass
Founded: 2015
United States
gmass.co

Company Information

Sellvance
Founded: 2024
Estonia
sellvance.com

Alternatives

lemlist

lemlist

lempire

Alternatives

GBlast

GBlast

Snov.io
SmartReach

SmartReach

SmartReach.io

Categories

Cold Email Supported
Email Tracking Supported
Email Verification Supported
Mail Merge Supported
Sales Engagement Supported

Categories

Go-To-Market Supported
Sales Engagement Supported

Email Tracking Features

A/B Testing Not Supported
Audience Segmentation Supported
Campaign Management Supported
Event-Based Notifications Supported
Location Tracking Not Supported
Team Management Supported

Integrations

Gmail Supported
Google Chrome Supported
Google Sheets Supported
Google Workspace Supported
Hyperise Supported
Microsoft 365 Supported
Microsoft Word Supported
Pitchsail Supported

Integrations

Gmail Not Supported
Google Chrome Not Supported
Google Sheets Not Supported
Google Workspace Not Supported
Hyperise Not Supported
Microsoft 365 Not Supported
Microsoft Word Not Supported
Pitchsail Not Supported
Claim GMass and update features and information
Claim GMass and update features and information
Claim Sellvance and update features and information
Claim Sellvance and update features and information