Boost Inbox vs Lemwarm: Email Warmup Tool Comparison
Compare Boost Inbox and Lemwarm side by side. See pricing, features, and integrations to choose the right email warmup tool for your needs.
Boost Inbox and Lemwarm are both email warmup tools for building sender reputation, but they differ in price and approach. Boost Inbox starts at $5/mo with fully automated warmup across Gmail, GSuite, Outlook 365, Yahoo Mail, Amazon SES, and SMTP. Lemwarm starts at $29/mo, using a network of 20,000+ healthy domains and native lemlist integration.
Key takeaways
- Boost Inbox's Starter plan costs $5/mo for 1 mailbox with 50 daily positive engagements, while Lemwarm's Essential Plan costs $29/mo per email account.
- Lemwarm uses a warm-up network of 20,000 plus healthy domains and offers a deliverability score out of 100, features not listed by Boost Inbox.
- Boost Inbox lists an email health checker tool and inbox reputation analytics that are not listed by Lemwarm.
- Boost Inbox integrates with Gmail, GSuite, Outlook 365, Yahoo Mail, Amazon SES, and SMTP, while Lemwarm integrates with Gmail, Google Workspace, Outlook, Microsoft 365, SMTP, and lemlist along with HubSpot, Salesforce, and Pipedrive via lemlist.
- Lemwarm's Smart Plan costs $49/mo and adds personalized warmup using real email templates, and Lemwarm is free with any lemlist subscription.
Reviewed and updated September 2, 2026
Boost Inbox vs Lemwarm: Email Warmup Tool Comparison
Sales teams evaluating email domain warming and deliverability tools often narrow their shortlist to Boost Inbox and Lemwarm. Both target the same job, but they cater to different workflows and budgets. This comparison covers pricing, features, and integrations so you can pick the right fit.
The Quick Answer
By each vendor's own wording, Boost Inbox lists email warmup and fully automated, while Lemwarm lists automated email warmup with human-like interactions and warm-up network of 20,000+ healthy domains. 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 Lemwarm at $29/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.
Lemwarm is Email warmup tool from lemlist that builds sender reputation using a network of 20,000+ healthy domains, with industry-tailored warmup clusters and deliverability scoring.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Starter
Essential Plan
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
Lemwarm Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Essential Plan | $29/mo | per email account | Warm-up network of 20k+ healthy domains |
| Smart Plan | $49/mo | per email account | Everything in Essential plan |
| Custom | Contact Sales | More than 10 users? | Everything in Smart plan |
Source: Lemwarm Pricing
Pricing Analysis
Boost Inbox is more affordable at the entry level ($5/mo vs $29/mo). For teams with tight budgets or those just getting started with email domain warming and deliverability, this price difference matters.
Features Breakdown
- Email Warmup
- Fully Automated
- Status Reports
- Human Review
- Premium Support
- Realistic emails sent from your inbox daily
- and 2 more listed below
- Automated email warmup with human-like interactions
- Warm-up network of 20,000+ healthy domains
- Industry-tailored warmup clusters for natural patterns
- Deliverability score out of 100
- Technical setup checker (SPF, DKIM, DMARC)
- Personalized warmup using your real email templates (Smart plan)
- 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
Lemwarm Key Features
- Automated email warmup with human-like interactions
- Warm-up network of 20,000+ healthy domains
- Industry-tailored warmup clusters for natural patterns
- Deliverability score out of 100
- Technical setup checker (SPF, DKIM, DMARC)
- Personalized warmup using your real email templates (Smart plan)
- Custom deliverability alerts and recommendations
- Free with any lemlist subscription
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 Lemwarm
- Automated email warmup with human-like interactions
- Warm-up network of 20,000+ healthy domains
- Industry-tailored warmup clusters for natural patterns
- Deliverability score out of 100
- Technical setup checker (SPF, DKIM, DMARC)
- Personalized warmup using your real email templates (Smart plan)
- Custom deliverability alerts and recommendations
- Free with any lemlist subscription
Integration Ecosystem
Boost Inbox Integrations
Boost Inbox connects with: Gmail, GSuite, Outlook 365, Yahoo Mail, Amazon SES, SMTP.
Lemwarm Integrations
Lemwarm connects with: Gmail, Google Workspace, Outlook, Microsoft 365, SMTP, lemlist (native), HubSpot (via lemlist), Salesforce (via lemlist), Pipedrive (via lemlist).
Shared Integrations
Both tools integrate with: Gmail, SMTP.
Integrations listed only by Boost Inbox: GSuite, Outlook 365, Yahoo Mail, Amazon SES.
Integrations listed only by Lemwarm: Google Workspace, Outlook, Microsoft 365, lemlist (native), HubSpot (via lemlist), Salesforce (via lemlist), Pipedrive (via lemlist).
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 Lemwarm
- Budget-conscious teams looking for an affordable email warmup tool
- Organizations with complex tech stacks needing broad integration support (9 integrations)
- Enterprise buyers who prefer custom pricing and dedicated support
Feature Comparison Summary
| Feature | Boost Inbox | Lemwarm |
|---|---|---|
| Starting Price | $5/mo | $29/mo |
| Top Tier Price | $19/mo | Contact Sales |
| Total Features Listed | 8 | 8 |
| Integrations | 6 | 9 |
| Founded | N/A | 2018 |
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 Lemwarm both serve the email domain warming and deliverability market. Boost Inbox offers a more accessible entry point at $5/mo, while Lemwarm starts at $29/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 Lemwarm for current information.
Frequently asked questions.
Frequently asked questions- What is the price difference between Boost Inbox and Lemwarm?
- Boost Inbox starts at $5/mo for its Starter plan covering 1 mailbox, while Lemwarm starts at $29/mo for its Essential Plan priced per email account. Boost Inbox also offers a Team plan at $9/mo for 3 mailboxes and a Premium plan at $19/mo for 8 mailboxes, making it the more affordable entry option.
- Which tool is better for budget conscious teams?
- Boost Inbox is positioned as the better fit for budget conscious teams, since it starts at $5/mo compared to Lemwarm's $29/mo entry price. It is also recommended for teams launching new email domains for outreach.
- Does Lemwarm integrate with lemlist and other CRMs?
- Yes, Lemwarm integrates natively with lemlist and connects with HubSpot, Salesforce, and Pipedrive via lemlist. It also supports Gmail, Google Workspace, Outlook, Microsoft 365, and SMTP.
- What integrations does Boost Inbox support?
- Boost Inbox connects with Gmail, GSuite, Outlook 365, Yahoo Mail, Amazon SES, and SMTP. Gmail and SMTP are integrations shared with Lemwarm, while GSuite, Outlook 365, Yahoo Mail, and Amazon SES are listed only by Boost Inbox.
- Is Lemwarm free to use?
- Lemwarm is listed as free with any lemlist subscription, according to its feature list. Paid Lemwarm plans include the Essential Plan at $29/mo and the Smart Plan at $49/mo, which adds personalized warmup using real email templates.
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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