Inbox Warmup vs MailHeat: Email Warmup Tool Comparison
Compare Inbox Warmup and MailHeat side by side. See pricing, features, and integrations to choose the right email warmup tool for your needs.
Compare Inbox Warmup and MailHeat side by side. See pricing, features, and integrations to choose the right email warmup tool for your needs.
Reviewed and updated September 4, 2026
Inbox Warmup vs MailHeat: Email Warmup Tool Comparison
Inbox Warmup and MailHeat compete head-to-head in the email domain warming and deliverability space. This guide compares their pricing tiers, feature sets, and integration ecosystems to help you make a confident decision.
The Quick Answer
By each vendor's own wording, Inbox Warmup lists smtp diagnostics and dns authentication, while MailHeat lists secure smtp connection and health & activity dashboard. A capability both offer can appear under different names, so read both feature lists below.
Inbox Warmup offers a lower entry point at $39/mo compared to MailHeat at $69.99/mo.
If your priority is building sender reputation and improving inbox placement, both tools target it. The right choice depends on your budget, team size, and the specific capabilities you need most.
Understanding the Core Difference
Inbox Warmup is Inbox warm-up and sender reputation platform that connects SMTP infrastructure, authenticates sending domains (SPF, DKIM, DMARC), increases activity gradually, monitors reputation signals and enforces hourly and monthly sending limits from one dashboard.
MailHeat is Inbox warmup and deliverability platform that simulates the positive engagement mailbox providers reward across a warmup pool, with gradual pacing, a per-inbox health dashboard and deliverability expert consulting on the higher tiers.
Both platforms offer free tools. Where they diverge is in their approach to pricing tiers and advanced capabilities.
Pricing Comparison
Launch
Starter
Inbox Warmup Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Launch | $39/mo | Not published per mailbox; plans are sized by credits | 5,000 credits and 75 emails/hour |
| Growth | $99/mo | Not published per mailbox; plans are sized by credits | 20,000 credits and 200 emails/hour |
| Professional | $199/mo | Not published per mailbox; plans are sized by credits | 100,000 credits and 500 emails/hour |
| Agency | Contact Sales | Custom credits | Custom credits and support through live chat |
Source: Inbox Warmup Pricing
MailHeat Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Starter | $69.99/mo | 1 account to warm (1 SMTP); 1 user | Up to 50 emails/day |
| Growth | $159.99/mo | Up to 3 accounts to warm (3 SMTPs); 2 users | Up to 200 emails/day per inbox |
| Scale | $479.99/mo | Up to 10 accounts to warm (10 SMTPs); 5 users | Up to 500 emails/day per inbox |
| Tailored Plan | Contact Sales | Unlimited accounts & SMTPs; unlimited users | Unlimited emails/day |
Source: MailHeat Pricing
Pricing Analysis
Inbox Warmup is more affordable at the entry level ($39/mo vs $69.99/mo). For teams with tight budgets or those just getting started with email domain warming and deliverability, this price difference matters.
Features Breakdown
- SMTP diagnostics
- DNS authentication
- Smart warmup
- Reputation Center
- Campaign controls
- Admin-managed SMTP
- Free Tools
- Secure SMTP connection
- Health & activity dashboard
- Gradual warmup pacing
- Email & chat support
- Deliverability expert consulting
- Free Deliverability Audit
- and 1 more listed below
Inbox Warmup Key Features
- SMTP diagnostics
- DNS authentication
- Smart warmup
- Reputation Center
- Campaign controls
- Admin-managed SMTP
- Free Tools
MailHeat Key Features
- Secure SMTP connection
- Health & activity dashboard
- Gradual warmup pacing
- Email & chat support
- Deliverability expert consulting
- Free Deliverability Audit
- Success Manager
- Free tools
Shared Capabilities
Both Inbox Warmup and MailHeat include:
- Free Tools
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 Inbox Warmup
- SMTP diagnostics
- DNS authentication
- Smart warmup
- Reputation Center
- Campaign controls
- Admin-managed SMTP
Listed only by MailHeat
- Secure SMTP connection
- Health & activity dashboard
- Gradual warmup pacing
- Email & chat support
- Deliverability expert consulting
- Free Deliverability Audit
- Success Manager
Integration Ecosystem
Inbox Warmup Integrations
Inbox Warmup connects with: SMTP.
MailHeat Integrations
MailHeat connects with: SMTP, Gmail, Google Workspace, Microsoft 365, Outlook.
Shared Integrations
Both tools integrate with: SMTP.
Integrations listed only by MailHeat: Gmail, Google Workspace, Microsoft 365, Outlook.
Use Case Recommendations
Best Fit for Inbox Warmup
- Budget-conscious teams looking for an affordable email warmup tool
- Enterprise buyers who prefer custom pricing and dedicated support
- Teams launching new email domains for outreach
- Organizations recovering from deliverability issues
Best Fit for MailHeat
- Teams that need a wide feature set (8 capabilities listed)
- Organizations with complex tech stacks needing broad integration support (5 integrations)
- Enterprise buyers who prefer custom pricing and dedicated support
Feature Comparison Summary
| Feature | Inbox Warmup | MailHeat |
|---|---|---|
| Starting Price | $39/mo | $69.99/mo |
| Top Tier Price | Contact Sales | Contact Sales |
| Total Features Listed | 7 | 8 |
| Integrations | 1 | 5 |
Getting Started Checklist
- Define your email domain warming and deliverability requirements and monthly budget
- Estimate your expected warmup email 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
Inbox Warmup and MailHeat both serve the email domain warming and deliverability market. Inbox Warmup offers a more accessible entry point at $39/mo, while MailHeat starts at $69.99/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 Inbox Warmup and MailHeat for current information.
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
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