Lemwarm vs Warmforge: Email Warmup Tool Comparison
Compare Lemwarm and Warmforge side by side. See pricing, features, and integrations to choose the right email warmup tool for your needs.
Lemwarm and Warmforge are both email warmup tools that build sender reputation, but they differ in pricing and approach: Lemwarm starts at $29/mo with a network of 20,000+ healthy domains, while Warmforge starts at $12/mo per mailbox slot with AI-written emails and a per-mailbox Heat Score.
Key takeaways
- Lemwarm's Essential Plan costs $29/mo per email account and includes access to a warm-up network of 20,000+ healthy domains.
- Warmforge's entry-level Email Warm Up plan costs $12/mo per slot, with one free slot and one free placement test per month included.
- Warmforge offers a Placement Tests Pro Plan at $39/mo covering 50 mailboxes per test and unlimited tests on the $169/mo Growth Plan.
- Both tools integrate with Gmail, Google Workspace, Outlook, and Microsoft 365, but Lemwarm also connects natively with lemlist, HubSpot, Salesforce, and Pipedrive.
- Warmforge uses AI-written emails and a per-mailbox Heat Score, while Lemwarm relies on industry-tailored warmup clusters and a deliverability score out of 100.
Reviewed and updated September 2, 2026
Lemwarm vs Warmforge: Email Warmup Tool Comparison
Lemwarm and Warmforge are both email warmup tools. Choosing between them depends on your team size, budget, and specific email domain warming and deliverability requirements. Here is what each vendor publishes about pricing, features, and integrations.
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 Warmforge lists email warm up and monitoring & health checks. A capability both offer can appear under different names, so read both feature lists below.
Warmforge offers a lower entry point at $12/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.
Warmforge is Email warm up tool from the Forge Ecosystem that warms mailboxes with AI-written emails and tracks a per-mailbox Heat Score. Adds DNS, MX and blacklist health checks, placement tests and automatic removal of warm-up mail that lands in spam.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Essential Plan
Email Warm Up (per slot)
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
Warmforge Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Email Warm Up (per slot) | $12/mo | 1 slot covers 1 mailbox; 1 free slot included | Automated AI email warm up; 1 free placement test per month |
| Placement Tests Pro Plan | $39/mo | 50 mailboxes per test | 100 tests per month |
| Placement Tests Growth Plan | $169/mo | 250 mailboxes per test | Unlimited tests |
Source: Warmforge Pricing
Pricing Analysis
Warmforge offers the lower entry point ($12/mo vs $29/mo). Teams watching their budget will appreciate the savings, especially when starting out.
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 Warm Up
- Monitoring & Health Checks
- Placement Tests
- Deliverability Boost
- Always-On Warm Up
- Heat Score per mailbox
- and 2 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
Warmforge Key Features
- Email Warm Up
- Monitoring & Health Checks
- Placement Tests
- Deliverability Boost
- Always-On Warm Up
- Heat Score per mailbox
- Health Checks on DNS and MX records and blacklist status
- Unique emails written by AI
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 Warmforge
- Email Warm Up
- Monitoring & Health Checks
- Placement Tests
- Deliverability Boost
- Always-On Warm Up
- Heat Score per mailbox
- Health Checks on DNS and MX records and blacklist status
- Unique emails written by AI
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).
Warmforge Integrations
Warmforge connects with: Google Workspace, Microsoft 365, Gmail, Outlook, Salesforge (native), Mailforge (native).
Shared Integrations
Both tools integrate with: Gmail, Google Workspace, Outlook, Microsoft 365.
Integrations listed only by Lemwarm: SMTP, lemlist (native), HubSpot (via lemlist), Salesforce (via lemlist), Pipedrive (via lemlist).
Integrations listed only by Warmforge: Salesforge (native), Mailforge (native).
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 Warmforge
- 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
Feature Comparison Summary
| Feature | Lemwarm | Warmforge |
|---|---|---|
| Starting Price | $29/mo | $12/mo |
| Top Tier Price | Contact Sales | $169/mo |
| Total Features Listed | 8 | 8 |
| Integrations | 9 | 6 |
| Founded | 2018 | 2024 |
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 Warmforge both serve the email domain warming and deliverability market. Warmforge offers a more accessible entry point at $12/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 Warmforge for current information.
Frequently asked questions.
Frequently asked questions- How much does Lemwarm cost compared to Warmforge?
- Lemwarm's Essential Plan starts at $29/mo per email account, with a Smart Plan at $49/mo. Warmforge's entry Email Warm Up plan costs $12/mo per slot, making it the lower-priced option, though it also offers separate Placement Tests plans priced at $39/mo and $169/mo.
- What integrations does Lemwarm support that Warmforge doesn't?
- Lemwarm connects natively with lemlist and, through lemlist, with HubSpot, Salesforce, and Pipedrive, plus general SMTP support. Warmforge does not list these integrations. Instead it connects natively with Salesforge and Mailforge, tools within its own Forge Ecosystem.
- What is Warmforge's Heat Score?
- Heat Score is a per-mailbox metric Warmforge uses to track the health of each mailbox during warmup. It works alongside Warmforge's monitoring of DNS, MX, and blacklist status, as well as placement tests, to help identify when warmup mail is landing in spam.
- Does Lemwarm require a separate subscription?
- Lemwarm is listed as free with any lemlist subscription, though its Essential and Smart plans still carry their own $29/mo and $49/mo pricing for warmup features. Lemwarm also offers a custom plan for teams with more than 10 users.
- Which tool has cheaper entry pricing, Lemwarm or Warmforge?
- Warmforge has the lower entry price at $12/mo per mailbox slot, compared to Lemwarm's Essential Plan at $29/mo per email account. Warmforge's plan includes one free slot and one free placement test per month.
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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