Lemwarm vs Warmup Inbox: Email Warmup Tool Comparison
Compare Lemwarm and Warmup Inbox side by side. See pricing, features, and integrations to choose the right email warmup tool for your needs.
Lemwarm and Warmup Inbox both build sender reputation and improve inbox placement, but differ in approach and price. Lemwarm starts at $29/mo with a network of 20,000+ healthy domains and deliverability scoring, while Warmup Inbox starts at $19/mo with a network of more than 30,000 real inboxes plus cold email sequences and ESP warmup.
Key takeaways
- Lemwarm's Essential Plan costs $29/mo, while its Smart Plan costs $49/mo.
- Warmup Inbox's Basic plan costs $19/mo for 75 warmup messages per day, with Pro at $59/mo for 250 messages per day and Max at $99/mo for 1,000 messages per day.
- Lemwarm uses a warm-up network of 20,000+ healthy domains, while Warmup Inbox uses a network of more than 30,000 real inboxes.
- Warmup Inbox offers 4 pricing tiers compared to Lemwarm's 3 tiers.
- Lemwarm integrates with lemlist, HubSpot, Salesforce, and Pipedrive, while Warmup Inbox integrates with Zoho Mail, Amazon SES, Mailgun, SendGrid, and Sendinblue (Brevo).
Reviewed and updated September 2, 2026
Lemwarm vs Warmup Inbox: Email Warmup Tool Comparison
Finding the right email warmup tool can directly impact your revenue pipeline. Lemwarm and Warmup Inbox 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, Lemwarm lists automated email warmup with human-like interactions and warm-up network of 20,000+ healthy domains, while Warmup Inbox lists email warmup and cold email sequence. A capability both offer can appear under different names, so read both feature lists below.
Warmup Inbox offers a lower entry point at $19/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
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.
Warmup Inbox is Email warmup service that exchanges natural-looking email with a network of more than 30,000 real inboxes to build sender reputation automatically. Also offers cold email sequences, language warmup, ESP warmup and IP warmup from the same dashboard.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Essential Plan
Basic
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
Warmup Inbox Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Basic | $19/mo | per inbox | 75 warmup messages/day |
| Pro | $59/mo | per inbox | 250 warmup messages/day |
| Max | $99/mo | per inbox | 1,000 warmup messages/day |
| For agencies & teams | Contact Sales | Custom plans starting at 15 inboxes | custom |
Source: Warmup Inbox Pricing
Pricing Analysis
Warmup Inbox offers the lower entry point ($19/mo vs $29/mo). Teams watching their budget will appreciate the savings, especially when starting out.
Warmup Inbox offers 4 pricing tiers compared to Lemwarm's 3, giving you more granularity as you scale.
Features Breakdown
- 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
- Email warmup
- Cold email sequence
- Language warmup
- ESP warmup tool
- IP warmup
- Spam & Category monitoring
- and 3 more listed below
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
Warmup Inbox Key Features
- Email warmup
- Cold email sequence
- Language warmup
- ESP warmup tool
- IP warmup
- Spam & Category monitoring
- Email reputation Check
- Human-like AI generated content
- Developers API
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 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
Listed only by Warmup Inbox
- Email warmup
- Cold email sequence
- Language warmup
- ESP warmup tool
- IP warmup
- Spam & Category monitoring
- Email reputation Check
- Human-like AI generated content
- Developers API
Integration Ecosystem
Lemwarm Integrations
Lemwarm connects with: Gmail, Google Workspace, Outlook, Microsoft 365, SMTP, lemlist (native), HubSpot (via lemlist), Salesforce (via lemlist), Pipedrive (via lemlist).
Warmup Inbox Integrations
Warmup Inbox connects with: Gmail & Workspace, Outlook & Microsoft 365, Zoho Mail, Amazon SES, Mailgun, SendGrid, Sendinblue (Brevo), Any inbox with SMTP.
Integrations listed only by Lemwarm: Gmail, Google Workspace, Outlook, Microsoft 365, SMTP, lemlist (native), HubSpot (via lemlist), Salesforce (via lemlist), Pipedrive (via lemlist).
Integrations listed only by Warmup Inbox: Gmail & Workspace, Outlook & Microsoft 365, Zoho Mail, Amazon SES, Mailgun, SendGrid, Sendinblue (Brevo), Any inbox with SMTP.
Use Case Recommendations
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
Best Fit for Warmup Inbox
- Budget-conscious teams looking for an affordable email warmup tool
- Teams that need a wide feature set (9 capabilities listed)
- Enterprise buyers who prefer custom pricing and dedicated support
Feature Comparison Summary
| Feature | Lemwarm | Warmup Inbox |
|---|---|---|
| Starting Price | $29/mo | $19/mo |
| Top Tier Price | Contact Sales | Contact Sales |
| Total Features Listed | 8 | 9 |
| Integrations | 9 | 8 |
| Founded | 2018 | N/A |
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
Lemwarm and Warmup Inbox both serve the email domain warming and deliverability market. Warmup Inbox offers a more accessible entry point at $19/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 Lemwarm and Warmup Inbox for current information.
Frequently asked questions.
Frequently asked questions- Which is cheaper, Lemwarm or Warmup Inbox?
- Warmup Inbox has the lower entry price at $19/mo compared to Lemwarm's $29/mo Essential Plan. However, Warmup Inbox's higher tiers reach $59/mo and $99/mo for Pro and Max plans, so total cost depends on the message volume and features needed.
- What is the core difference between Lemwarm and Warmup Inbox?
- Lemwarm is an email warmup tool from lemlist that uses a network of 20,000+ healthy domains with industry-tailored warmup clusters and deliverability scoring. Warmup Inbox exchanges natural-looking email across more than 30,000 real inboxes and adds cold email sequences, language warmup, ESP warmup, and IP warmup from one dashboard.
- Does Lemwarm integrate with lemlist and CRMs?
- Yes, Lemwarm integrates natively with lemlist and connects to HubSpot, Salesforce, and Pipedrive via lemlist. It also supports Gmail, Google Workspace, Outlook, Microsoft 365, and SMTP.
- Does Warmup Inbox support ESPs like SendGrid or Mailgun?
- Yes, Warmup Inbox connects with Amazon SES, Mailgun, SendGrid, and Sendinblue (Brevo), along with Zoho Mail, Gmail and Workspace, Outlook and Microsoft 365, and any inbox using SMTP.
- How many pricing tiers does each tool offer?
- Lemwarm offers 3 pricing tiers: Essential, Smart, and Custom for teams with more than 10 users. Warmup Inbox offers 4 tiers: Basic, Pro, Max, and a custom plan for agencies and teams starting at 15 inboxes.
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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