Boost Inbox vs Mailwarm: Email Warmup Tool Comparison
Compare Boost Inbox and Mailwarm side by side. See pricing, features, and integrations to choose the right email warmup tool for your needs.
Boost Inbox starts at $5/mo across three pricing tiers, while Mailwarm starts at $79/mo across four tiers. Boost Inbox suits budget-conscious teams and agencies needing an affordable warmup tool, while Mailwarm suits teams needing a wider feature set or enterprise buyers wanting custom pricing. Both aim to build sender reputation and improve inbox placement.
Key takeaways
- Boost Inbox's Starter plan costs $5/mo for 1 mailbox with 50 daily positive engagements.
- Mailwarm's Starter plan costs $79/mo for 1 mailbox or SMTP with up to 50 warmup emails per day.
- Mailwarm offers 4 pricing tiers, Starter, Growth, Scale, and a Tailored Plan, compared to Boost Inbox's 3 tiers.
- Boost Inbox lists 8 features on its own page, including a fully automated warmup process and an email health checker tool.
- Mailwarm lists 9 features on its own page, including SPF, DKIM, and DMARC validation and blacklist detection across major databases.
Reviewed and updated September 2, 2026
Boost Inbox vs Mailwarm: Email Warmup Tool Comparison
Boost Inbox and Mailwarm 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 Mailwarm lists b2b & b2c warm up and spam score monitoring. 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 Mailwarm at $79/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.
Mailwarm is Email warmup and deliverability platform that generates engagement across a network of aged real inboxes and includes a deliverability expert on every plan. Each interaction produces several positive signals, such as marking as non-spam, opening, marking as important and replying.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Starter
Starter
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
Mailwarm Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Starter | $79/mo | 1 mailbox/SMTP to warm; 1 user | Up to 50 warmup emails/day |
| Growth | $189/mo | 3 mailboxes/SMTPs to warm; 2 users | Up to 200 warmup emails/day |
| Scale | $549/mo | 10 mailboxes/SMTPs to warm; 5 users | Up to 500 warmup emails/day |
| Tailored Plan | Contact Sales | unlimited mailboxes, users | unlimited warmup emails, and replies |
Source: Mailwarm Pricing
Pricing Analysis
Boost Inbox is more affordable at the entry level ($5/mo vs $79/mo). For teams with tight budgets or those just getting started with email domain warming and deliverability, this price difference matters.
Mailwarm 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
- B2B & B2C warm up
- Spam score monitoring
- Provider-Level warmup
- Warmup your email content
- Authentication fix tools
- No IMAP access required
- and 3 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
Mailwarm Key Features
- B2B & B2C warm up
- Spam score monitoring
- Provider-Level warmup
- Warmup your email content
- Authentication fix tools
- No IMAP access required
- Progressive volume ramp-up to avoid spam filters
- SPF, DKIM, and DMARC validation
- Blacklist detection across major databases
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 Mailwarm
- B2B & B2C warm up
- Spam score monitoring
- Provider-Level warmup
- Warmup your email content
- Authentication fix tools
- No IMAP access required
- Progressive volume ramp-up to avoid spam filters
- SPF, DKIM, and DMARC validation
- Blacklist detection across major databases
Integration Ecosystem
Boost Inbox Integrations
Boost Inbox connects with: Gmail, GSuite, Outlook 365, Yahoo Mail, Amazon SES, SMTP.
Mailwarm Integrations
Mailwarm connects with: Gmail, Google Workspace, Outlook, Microsoft 365, Yahoo, Custom SMTP.
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 Mailwarm: Google Workspace, Outlook, Microsoft 365, Yahoo, Custom SMTP.
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 Mailwarm
- Teams that need a wide feature set (9 capabilities listed)
- 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 | Mailwarm |
|---|---|---|
| Starting Price | $5/mo | $79/mo |
| Top Tier Price | $19/mo | Contact Sales |
| Total Features Listed | 8 | 9 |
| 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 Mailwarm both serve the email domain warming and deliverability market. Boost Inbox offers a more accessible entry point at $5/mo, while Mailwarm starts at $79/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 Mailwarm for current information.
Frequently asked questions.
Frequently asked questions- Which is cheaper, Boost Inbox or Mailwarm?
- Boost Inbox is cheaper at the entry level, priced at $5/mo compared to Mailwarm's $79/mo starter plan. For teams with tight budgets or those just getting started with email domain warming and deliverability, this price difference matters significantly when choosing a tool.
- How many pricing tiers does each tool offer?
- Boost Inbox offers 3 pricing tiers: Starter, Team, and Premium, ranging from $5/mo to $19/mo. Mailwarm offers 4 tiers: Starter, Growth, Scale, and a Tailored Plan with contact-sales pricing, giving Mailwarm more granularity as teams scale.
- What integrations does Boost Inbox support?
- Boost Inbox connects with Gmail, GSuite, Outlook 365, Yahoo Mail, Amazon SES, and SMTP. Of these, only Gmail is shared with Mailwarm, while GSuite, Outlook 365, Yahoo Mail, Amazon SES, and SMTP are listed only by Boost Inbox.
- What integrations does Mailwarm support?
- Mailwarm connects with Gmail, Google Workspace, Outlook, Microsoft 365, Yahoo, and Custom SMTP. Gmail is the only integration shared with Boost Inbox, while Google Workspace, Outlook, Microsoft 365, Yahoo, and Custom SMTP are listed only by Mailwarm.
- Which tool is better suited for enterprise buyers?
- Mailwarm is the better fit for enterprise buyers, since it offers a Tailored Plan with contact-sales pricing, unlimited mailboxes, users, and warmup emails, along with a deliverability expert included on every plan. Mailwarm also lists 9 features compared to Boost Inbox's 8.
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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