Boost Inbox vs Warmy: Email Warmup Tool Comparison
Compare Boost Inbox and Warmy side by side. See pricing, features, and integrations to choose the right email warmup tool for your needs.
Boost Inbox and Warmy are both email warmup and deliverability tools, but they differ in pricing model and feature focus. Boost Inbox starts at $5/mo with tiered plans up to $19/mo, while Warmy uses custom, contact-sales pricing across all its B2B, B2C, and custom plans. The right pick depends on budget and required integrations.
Key takeaways
- Boost Inbox has three published plans: Starter at $5/mo, Team at $9/mo, and Premium at $19/mo, each offering 50 daily positive engagements per mailbox.
- Warmy publishes no fixed prices and instead offers B2B sender, B2C sender, and Custom plans that all require contacting sales for volume-based pricing.
- Boost Inbox integrates with Gmail, GSuite, Outlook 365, Yahoo Mail, Amazon SES, and SMTP, while Warmy integrates with Google Workspace, Microsoft 365, Gmail, Yahoo, Outlook, and Google Postmaster.
- Both tools list 8 features and 6 integrations each, with Gmail as their only shared integration.
- Warmy is the only one of the two to list Google Postmaster integration, email verification, and a dedicated deliverability expert among its features.
Reviewed and updated September 2, 2026
Boost Inbox vs Warmy: Email Warmup Tool Comparison
Boost Inbox and Warmy 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, Boost Inbox lists email warmup and fully automated, while Warmy lists email warm-up and email seed list. A capability both offer can appear under different names, so read both feature lists below.
Boost Inbox publishes an entry price of $5/mo; Warmy uses custom pricing, so the two cannot be compared on list price.
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
Boost Inbox is Email warmup service that gradually increases sending activity to build trust with email providers. It sends realistic emails from your inbox on a daily basis, keeps them out of spam, opens and bookmarks them, and replies to a portion of them to generate positive interactions.
Warmy is Automated email deliverability tool that warms up domains and IPs with AI-driven automation and a network of business or consumer mailboxes. Adds Google Postmaster integration, seed lists, deliverability insights and email verification in the same platform.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Starter
B2B sender
Boost Inbox Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Starter | $5/mo | 1 Mailbox For Warmup | 50 Daily Positive Engagement |
| Team | $9/mo | 3 Mailboxes For Warmup | 50 Daily Positive Engagement per mailbox |
| Premium | $19/mo | 8 Mailboxes For Warmup | 50 Daily Positive Engagement per mailbox |
Source: Boost Inbox Pricing
Warmy Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| B2B sender | Contact Sales | Reach Businesses | Volume-based pricing |
| B2C sender | Contact Sales | Reach Consumers | Volume-based pricing |
| Custom plan | Contact Sales | Custom Solution | Volume-based pricing |
Source: Warmy Pricing
Pricing Analysis
One or both platforms use custom or contact-based pricing for some tiers. Reach out to their sales teams for exact quotes based on your usage needs.
Features Breakdown
- Email Warmup
- Fully Automated
- Status Reports
- Human Review
- Premium Support
- Realistic emails sent from your inbox daily
- and 2 more listed below
- Email Warm-Up
- Email Seed List
- Deliverability Insights
- Google Postmaster Integration
- Email Verification
- Warmy API
- and 2 more listed below
Boost Inbox Key Features
- Email Warmup
- Fully Automated
- Status Reports
- Human Review
- Premium Support
- Realistic emails sent from your inbox daily
- Email health checker tool
- Inbox reputation analytics
Warmy Key Features
- Email Warm-Up
- Email Seed List
- Deliverability Insights
- Google Postmaster Integration
- Email Verification
- Warmy API
- Deliverability monitor
- Dedicated deliverability expert
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 Boost Inbox
- Email Warmup
- Fully Automated
- Status Reports
- Human Review
- Premium Support
- Realistic emails sent from your inbox daily
- Email health checker tool
- Inbox reputation analytics
Listed only by Warmy
- Email Warm-Up
- Email Seed List
- Deliverability Insights
- Google Postmaster Integration
- Email Verification
- Warmy API
- Deliverability monitor
- Dedicated deliverability expert
Integration Ecosystem
Boost Inbox Integrations
Boost Inbox connects with: Gmail, GSuite, Outlook 365, Yahoo Mail, Amazon SES, SMTP.
Warmy Integrations
Warmy connects with: Google Workspace, Microsoft 365, Gmail, Yahoo, Outlook, Google Postmaster.
Shared Integrations
Both tools integrate with: Gmail.
Integrations listed only by Boost Inbox: GSuite, Outlook 365, Yahoo Mail, Amazon SES, SMTP.
Integrations listed only by Warmy: Google Workspace, Microsoft 365, Yahoo, Outlook, Google Postmaster.
Use Case Recommendations
Best Fit for Boost Inbox
- Budget-conscious teams looking for an affordable email warmup tool
- Teams launching new email domains for outreach
- Organizations recovering from deliverability issues
- Agencies managing warmup across multiple client domains
Best Fit for Warmy
- 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
| Feature | Boost Inbox | Warmy |
|---|---|---|
| Starting Price | $5/mo | Contact Sales |
| Top Tier Price | $19/mo | Contact Sales |
| Total Features Listed | 8 | 8 |
| Integrations | 6 | 6 |
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
Boost Inbox and Warmy both serve the email domain warming and deliverability market. Boost Inbox publishes an entry price of $5/mo, while Warmy uses custom pricing for its plans, so compare on features and on the quote you receive. 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 Boost Inbox and Warmy for current information.
Frequently asked questions.
Frequently asked questions- Which is cheaper, Boost Inbox or Warmy?
- Boost Inbox has published pricing starting at $5/mo, rising to $9/mo and $19/mo for its Team and Premium plans. Warmy does not publish fixed prices; all of its plans, B2B sender, B2C sender, and Custom, require contacting sales for a volume-based quote, so a direct price comparison is not possible.
- What integrations does Boost Inbox support?
- Boost Inbox integrates with Gmail, GSuite, Outlook 365, Yahoo Mail, Amazon SES, and SMTP. This gives it broader coverage of self-hosted and SMTP-based sending setups compared to Warmy's integration list.
- What integrations does Warmy support?
- Warmy integrates with Google Workspace, Microsoft 365, Gmail, Yahoo, Outlook, and Google Postmaster. Google Postmaster integration is unique to Warmy among the two tools compared here.
- Is Boost Inbox or Warmy better for enterprise teams?
- Warmy is positioned as the better fit for enterprise buyers who prefer custom pricing and dedicated support, since it offers a dedicated deliverability expert and custom-quoted plans. Boost Inbox is better suited to budget-conscious teams due to its published low-cost tiers starting at $5/mo.
- What features does Warmy offer that Boost Inbox does not list?
- Warmy lists Email Warm-Up, Email Seed List, Deliverability Insights, Google Postmaster Integration, Email Verification, Warmy API, a Deliverability Monitor, and a Dedicated Deliverability Expert. These appear only on Warmy's feature list, though similar capabilities may exist under different names at Boost Inbox.
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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