EmailWarmup.com vs GMass: Email Warmup Tool vs Cold Email Platform Comparison
Compare EmailWarmup.com (email warmup tool) and GMass (cold email platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
EmailWarmup.com and GMass serve different jobs in an outbound stack: EmailWarmup.com is an email warmup tool for domain warming and deliverability starting at $29/mo, while GMass is a Gmail-based cold email platform starting at $29.95/mo. Teams focused on inbox placement should pick EmailWarmup.com; teams sending campaigns and tracking replies should pick GMass. Many teams use both together.
Key takeaways
- EmailWarmup.com's Pro plan starts at $29/mo, while GMass's Standard plan starts at $29.95/mo.
- GMass offers four pricing tiers (Standard, Premium, Professional, and Teams at $175/mo for 5 users), compared to EmailWarmup.com's two tiers (Pro and Enterprise).
- EmailWarmup.com lists eight integrations including Google, Outlook, SendGrid, Mailchimp, Klaviyo, Shopify, and Salesforce, while GMass lists four including Gmail, Google Sheets, Zapier, and Google Workspace.
- EmailWarmup.com's feature list includes Personalized Warmup, Multiple ESP Warmup, Seed List Warmup, and a Deliverability Consultation, none of which appear on GMass's list.
- GMass's feature list includes working inside Gmail, unlimited emails/contacts/campaigns, a Spam Solver deliverability tool, and inbox rotation, none of which appear on EmailWarmup.com's list.
Reviewed and updated September 2, 2026
EmailWarmup.com vs GMass: Email Warmup Tool vs Cold Email Platform Comparison
EmailWarmup.com (email warmup tool) and GMass (cold email platform) sit next to each other in many outbound stacks. They are not substitutes for each other on every job, so this comparison covers pricing, features, and integrations for each and points out where the two meet.
The Quick Answer
EmailWarmup.com is an email warmup tool for email domain warming and deliverability; GMass is a cold email platform for cold email outreach. By each vendor's own wording, EmailWarmup.com lists personalized warmup and multiple esp warmup (google, outlook, etc.), and GMass lists works inside gmail and unlimited emails, contacts, and campaigns.
EmailWarmup.com offers a lower entry point at $29/mo compared to GMass at $29.95/mo.
If your priority is building sender reputation and improving inbox placement, EmailWarmup.com is the one built for it; for sending campaigns that land in the inbox and generate replies, that is GMass. Many teams run one of each.
Understanding the Core Difference
EmailWarmup.com is Email deliverability platform whose core product is personalized email warmup, matching your industry and mirroring your copy while warming professional-to-professional and personal-to-personal mailboxes. It adds unlimited email spam tests, a dedicated deliverability consultant, mailbox provisioning with 24/7 replacement, and a warmup API.
GMass is Gmail-based mass email and mail merge platform with unlimited emails, campaigns, and contacts directly inside Gmail.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Pro
Standard
EmailWarmup.com Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Pro | $29/mo | Per mailbox; For Individuals + Businesses. | Not published; warmup volume is not stated as a per-day figure |
| Enterprise | Contact Sales | For Individuals + Businesses. | Personalized Warmup at Higher Volume |
Source: EmailWarmup.com Pricing
GMass Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Standard | $29.95/mo | Unlimited | Unlimited (Gmail limits apply) |
| Premium | $39.95/mo | Unlimited | Unlimited (Gmail limits apply) |
| Professional | $59.95/mo | Unlimited | Unlimited (Gmail limits apply) |
| Teams (5 users) | $175/mo | Unlimited | Unlimited (Gmail limits apply) |
Source: GMass Pricing
Pricing Analysis
EmailWarmup.com is more affordable at the entry level ($29/mo vs $29.95/mo). For teams with tight budgets or those just getting started with email domain warming and deliverability and cold email outreach, this price difference matters.
GMass offers 4 pricing tiers compared to EmailWarmup.com's 2, giving you more granularity as you scale.
Features Breakdown
- Personalized Warmup
- Multiple ESP Warmup (Google, Outlook, etc.)
- Select Warmup Language
- Deliverability Test
- Google Postmaster Integration
- API Access
- and 2 more listed below
- Works inside Gmail
- Unlimited emails, contacts, and campaigns
- Mail merge personalization
- Free email verification
- Automated follow-up sequences
- A/B testing
- and 4 more listed below
EmailWarmup.com Key Features
- Personalized Warmup
- Multiple ESP Warmup (Google, Outlook, etc.)
- Select Warmup Language
- Deliverability Test
- Google Postmaster Integration
- API Access
- Seed List Warmup
- Deliverability Consultation
GMass Key Features
- Works inside Gmail
- Unlimited emails, contacts, and campaigns
- Mail merge personalization
- Free email verification
- Automated follow-up sequences
- A/B testing
- Spam Solver deliverability tool
- Custom tracking links
- Inbox rotation
- API and Zapier access
The two lists below are a diff of each vendor's own feature list by exact wording, so a capability both tools offer can appear on either side under a different name.
Listed only by EmailWarmup.com
- Personalized Warmup
- Multiple ESP Warmup (Google, Outlook, etc.)
- Select Warmup Language
- Deliverability Test
- Google Postmaster Integration
- API Access
- Seed List Warmup
- Deliverability Consultation
Listed only by GMass
- Works inside Gmail
- Unlimited emails, contacts, and campaigns
- Mail merge personalization
- Free email verification
- Automated follow-up sequences
- A/B testing
- Spam Solver deliverability tool
- Custom tracking links
- Inbox rotation
- API and Zapier access
Integration Ecosystem
EmailWarmup.com Integrations
EmailWarmup.com connects with: Google, Outlook, Office, SendGrid, Mailchimp, Klaviyo, Shopify, Salesforce.
GMass Integrations
GMass connects with: Gmail, Google Sheets, Zapier, Google Workspace.
Integrations listed only by EmailWarmup.com: Google, Outlook, Office, SendGrid, Mailchimp, Klaviyo, Shopify, Salesforce.
Integrations listed only by GMass: Gmail, Google Sheets, Zapier, Google Workspace.
Use Case Recommendations
Best Fit for EmailWarmup.com
- Budget-conscious teams looking for an affordable email warmup tool
- Organizations with complex tech stacks needing broad integration support (8 integrations)
- Enterprise buyers who prefer custom pricing and dedicated support
Best Fit for GMass
- Budget-conscious teams looking for an affordable cold email platform
- Teams that need a wide feature set (10 capabilities listed)
- Sales teams running high-volume outbound email campaigns
- Agencies managing multiple client outreach programs
Feature Comparison Summary
| Feature | EmailWarmup.com | GMass |
|---|---|---|
| Starting Price | $29/mo | $29.95/mo |
| Top Tier Price | Contact Sales | $175/mo |
| Total Features Listed | 8 | 10 |
| Integrations | 8 | 4 |
| Founded | N/A | 2015 |
Getting Started Checklist
- Define your email domain warming and deliverability and cold email outreach requirements and monthly budget
- Estimate your expected warmup email volume and email sending volume to find the right tier
- List the integrations your team currently relies on
- Sign up for free trials or demos of both platforms
- Run a small test with each tool before making a commitment
- Evaluate the onboarding experience and support quality
Final Thoughts
EmailWarmup.com serves the email domain warming and deliverability side of an outbound stack and GMass the cold email outreach side. EmailWarmup.com offers a more accessible entry point at $29/mo, while GMass starts at $29.95/mo. Your decision should weigh pricing against the specific features that matter most for your workflow.
Start with a trial of each to see which platform fits your team's daily process. The best tool is the one your team actually uses consistently.
Pricing and features verified as of September 2026. Visit EmailWarmup.com and GMass for current information.
Frequently asked questions.
Frequently asked questions- What is the main difference between EmailWarmup.com and GMass?
- EmailWarmup.com is an email warmup tool focused on domain warming and deliverability, while GMass is a cold email platform built for sending outreach campaigns from Gmail. EmailWarmup.com helps build sender reputation and inbox placement, whereas GMass handles sending campaigns and generating replies, so many teams use both.
- Which tool is cheaper, EmailWarmup.com or GMass?
- EmailWarmup.com has a lower entry price at $29/mo compared to GMass's Standard plan at $29.95/mo. GMass offers additional tiers at $39.95/mo, $59.95/mo, and $175/mo for a 5-user Teams plan, giving more pricing granularity as teams scale.
- Does GMass work outside of Gmail?
- The article describes GMass as a Gmail-based mass email and mail merge platform that works inside Gmail, with its listed integrations limited to Gmail, Google Sheets, Zapier, and Google Workspace. It does not mention support for other email service providers.
- What integrations does EmailWarmup.com support?
- EmailWarmup.com connects with Google, Outlook, Office, SendGrid, Mailchimp, Klaviyo, Shopify, and Salesforce, totaling eight listed integrations. This is broader than GMass's four listed integrations of Gmail, Google Sheets, Zapier, and Google Workspace.
- Should I use both EmailWarmup.com and GMass together?
- The article notes that many teams run one of each because the tools solve different problems: EmailWarmup.com builds sender reputation and inbox placement, while GMass sends campaigns and tracks replies from within Gmail. Using both covers deliverability and outreach in the same stack.
About the author.
Tim Carden is CMO / CTO at RevenueFlow, which builds and operates outbound revenue engines for B2B companies. Studied at McGill University.
Tim Carden · CMO / CTO
Connect on LinkedIn →Explore more.
Ready to scale your outreach?
We build GTM engines that book real meetings. See the receipts.
Related articles.
Mailwarm vs ReachInbox: Email Warmup Tool vs Cold Email Platform Comparison
Compare Mailwarm (email warmup tool) and ReachInbox (cold email platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Mailwarm vs Vocus.io: Email Warmup Tool vs Cold Email Platform Comparison
Compare Mailwarm (email warmup tool) and Vocus.io (cold email platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Vocus.io vs Zeliq: Cold Email Platform vs Sales Engagement Platform Comparison
Compare Vocus.io (cold email platform) and Zeliq (sales engagement platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
MailRush.io vs Outplay: Cold Email Platform Comparison
Compare MailRush.io and Outplay side by side. See pricing, features, and integrations to choose the right cold email platform for your needs.
MailRush.io vs QuickMail: Cold Email Platform Comparison
Compare MailRush.io and QuickMail side by side. See pricing, features, and integrations to choose the right cold email platform for your needs.
MailRush.io vs Reply.io: Cold Email Platform Comparison
Compare MailRush.io and Reply.io side by side. See pricing, features, and integrations to choose the right cold email platform for your needs.