Inboxy vs MailHeat: Email Warmup Tool Comparison

Inboxy vs MailHeat: Email Warmup Tool Comparison

Finding the right email warmup tool can directly impact your revenue pipeline. Inboxy and MailHeat both aim to solve the same core problem (building sender reputation and improving inbox placement), yet they approach it differently. Let's break down the specifics.

The Quick Answer

By each vendor's own wording, Inboxy lists primary inbox supercharger and domain score iq monitoring, 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.

Inboxy offers a lower entry point at $47/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

Inboxy is Email warmup tool that improves deliverability by gradually increasing sending volume and boosting domain reputation. It runs warmup through a private network of headless browsers with AI-driven adjustments to sending metrics.

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.

The two platforms take different approaches to solving the same core challenge.

Pricing Comparison

$47/moInboxy entry plan

Inboxy Pro

$69.99/moMailHeat entry plan

Starter

Inboxy Pricing (as of September 2026)

Source: Inboxy Pricing

MailHeat Pricing (as of September 2026)

Source: MailHeat Pricing

Pricing Analysis

Inboxy is more affordable at the entry level ($47/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.

MailHeat offers 4 pricing tiers compared to Inboxy's 1, giving you more granularity as you scale.

Features Breakdown

Inboxy lists

• Primary Inbox Supercharger
• Domain Score IQ Monitoring
• AI Powered Inbox Adjustments
• Dynamic Email Scheduling
• Live Inbox Engagement Feed
• AI Generated Emails (GPT-3)
• and 3 more listed below

MailHeat lists

• Secure SMTP connection
• Health & activity dashboard
• Gradual warmup pacing
• Email & chat support
• Deliverability expert consulting
• Free Deliverability Audit
• and 2 more listed below

Inboxy Key Features

• Primary Inbox Supercharger
• Domain Score IQ Monitoring
• AI Powered Inbox Adjustments
• Dynamic Email Scheduling
• Live Inbox Engagement Feed
• AI Generated Emails (GPT-3)
• IP Warm Up Service
• SMTP Warm Up Service
• Inbox Placement Test

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

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 Inboxy

• Primary Inbox Supercharger
• Domain Score IQ Monitoring
• AI Powered Inbox Adjustments
• Dynamic Email Scheduling
• Live Inbox Engagement Feed
• AI Generated Emails (GPT-3)
• IP Warm Up Service
• SMTP Warm Up Service
• Inbox Placement Test

Listed only by MailHeat

• Secure SMTP connection
• Health & activity dashboard
• Gradual warmup pacing
• Email & chat support
• Deliverability expert consulting
• Free Deliverability Audit
• Success Manager
• Free tools

Integration Ecosystem

Inboxy Integrations

Inboxy connects with: Personal Gmail, Google Workspace, Outlook/Office (SMTP), Outlook/Office (Oauth), Mailgun, GoDaddy, Inboxroad, Sendgrid, Custom SMTP.

MailHeat Integrations

MailHeat connects with: SMTP, Gmail, Google Workspace, Microsoft 365, Outlook.

Shared Integrations

Both tools integrate with: Google Workspace.

Integrations listed only by Inboxy: Personal Gmail, Outlook/Office (SMTP), Outlook/Office (Oauth), Mailgun, GoDaddy, Inboxroad, Sendgrid, Custom SMTP.

Integrations listed only by MailHeat: SMTP, Gmail, Microsoft 365, Outlook.

Use Case Recommendations

Best Fit for Inboxy

• Budget-conscious teams looking for an affordable email warmup tool
• Teams that need a wide feature set (9 capabilities listed)
• Organizations with complex tech stacks needing broad integration support (9 integrations)

Best Fit for MailHeat

• Enterprise buyers who prefer custom pricing and dedicated support
• Teams launching new email domains for outreach
• Organizations recovering from deliverability issues
• Agencies managing warmup across multiple client domains

Feature Comparison Summary

Getting Started Checklist

1. Define your email domain warming and deliverability requirements and monthly budget
2. Estimate your expected warmup email volume to find the right tier
3. List the integrations your team currently relies on
4. Sign up for free trials or demos of both platforms
5. Run a small test with each tool before making a commitment
6. Evaluate the onboarding experience and support quality

Final Thoughts

Inboxy and MailHeat both serve the email domain warming and deliverability market. Inboxy offers a more accessible entry point at $47/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 Inboxy and MailHeat for current information.