Boost Inbox vs Inbox Warmup: Email Warmup Tool Comparison
Compare Boost Inbox and Inbox Warmup side by side. See pricing, features, and integrations to choose the right email warmup tool for your needs.
Compare Boost Inbox and Inbox Warmup side by side. See pricing, features, and integrations to choose the right email warmup tool for your needs.
Reviewed and updated September 4, 2026
Boost Inbox vs Inbox Warmup: Email Warmup Tool Comparison
Boost Inbox and Inbox Warmup 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 Inbox Warmup lists smtp diagnostics and dns authentication. A capability both offer can appear under different names, so read both feature lists below.
Boost Inbox offers a lower entry point at $5/mo compared to Inbox Warmup at $39/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
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.
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.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Starter
Launch
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
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
Pricing Analysis
Boost Inbox is more affordable at the entry level ($5/mo vs $39/mo). For teams with tight budgets or those just getting started with email domain warming and deliverability, this price difference matters.
Inbox Warmup offers 4 pricing tiers compared to Boost Inbox's 3, giving you more granularity as you scale.
Features Breakdown
- Email Warmup
- Fully Automated
- Status Reports
- Human Review
- Premium Support
- Realistic emails sent from your inbox daily
- and 2 more listed below
- SMTP diagnostics
- DNS authentication
- Smart warmup
- Reputation Center
- Campaign controls
- Admin-managed SMTP
- and 1 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
Inbox Warmup Key Features
- SMTP diagnostics
- DNS authentication
- Smart warmup
- Reputation Center
- Campaign controls
- Admin-managed SMTP
- 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 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 Inbox Warmup
- SMTP diagnostics
- DNS authentication
- Smart warmup
- Reputation Center
- Campaign controls
- Admin-managed SMTP
- Free Tools
Integration Ecosystem
Boost Inbox Integrations
Boost Inbox connects with: Gmail, GSuite, Outlook 365, Yahoo Mail, Amazon SES, SMTP.
Inbox Warmup Integrations
Inbox Warmup connects with: SMTP.
Shared Integrations
Both tools integrate with: SMTP.
Integrations listed only by Boost Inbox: Gmail, GSuite, Outlook 365, Yahoo Mail, Amazon SES.
Use Case Recommendations
Best Fit for Boost Inbox
- Budget-conscious teams looking for an affordable email warmup tool
- Teams that need a wide feature set (8 capabilities listed)
- Organizations with complex tech stacks needing broad integration support (6 integrations)
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
Feature Comparison Summary
| Feature | Boost Inbox | Inbox Warmup |
|---|---|---|
| Starting Price | $5/mo | $39/mo |
| Top Tier Price | $19/mo | Contact Sales |
| Total Features Listed | 8 | 7 |
| Integrations | 6 | 1 |
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 Inbox Warmup both serve the email domain warming and deliverability market. Boost Inbox offers a more accessible entry point at $5/mo, while Inbox Warmup starts at $39/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 Boost Inbox and Inbox Warmup 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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