Lemwarm vs Mailarrow: Email Warmup Tool vs Cold Email Platform Comparison
Compare Lemwarm (email warmup tool) and Mailarrow (cold email platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Lemwarm is an email warmup tool for domain warming and deliverability starting at $29 per month, while Mailarrow is a cold email platform for outreach campaigns starting at $39 per month. Lemwarm builds sender reputation through a network of 20,000+ healthy domains; Mailarrow sends unlimited campaigns through unlimited connected mailboxes. Many teams use both together.
Key takeaways
- Lemwarm's entry level Essential Plan costs $29 per month, while Mailarrow's entry level Basic plan costs $39 per month.
- Lemwarm uses a warm-up network of more than 20,000 healthy domains to build sender reputation.
- Mailarrow's Basic plan supports 2,000 active prospects and 6,000 emails, scaling up to 50,000 prospects and 150,000 emails on the Growth plan at $99 per month.
- Lemwarm is built by lemlist and is free with any lemlist subscription, and it integrates with Google Workspace, Microsoft 365, SMTP, HubSpot, Salesforce, and Pipedrive through lemlist.
- Mailarrow lists unlimited email warmup and unlimited mailboxes and integrates with Zoho, Zapier, and TrulyInbox in addition to Gmail and Outlook.
Reviewed and updated September 2, 2026
Lemwarm vs Mailarrow: Email Warmup Tool vs Cold Email Platform Comparison
Sales teams building an outbound stack often weigh Lemwarm, an email warmup tool for email domain warming and deliverability, against Mailarrow, a cold email platform for cold email outreach. They cover different parts of the workflow, so this comparison covers what each one does, what each one costs, and where they overlap.
The Quick Answer
Lemwarm is an email warmup tool for email domain warming and deliverability; Mailarrow is a cold email platform for cold email outreach. By each vendor's own wording, Lemwarm lists automated email warmup with human-like interactions and warm-up network of 20,000+ healthy domains, and Mailarrow lists unlimited email warmup and unlimited mailboxes.
Lemwarm offers a lower entry point at $29/mo compared to Mailarrow at $39/mo.
If your priority is building sender reputation and improving inbox placement, Lemwarm is the one built for it; for sending campaigns that land in the inbox and generate replies, that is Mailarrow. Many teams run one of each.
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.
Mailarrow is Cold email outreach software with email warmup, AI personalization, unlimited sequences and unlimited connected mailboxes. Users bring their own mailboxes and prospect lists; Mailarrow does not sell leads or provide inboxes.
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
Mailarrow Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Basic | $39/mo | 2,000 active prospects | 6,000 emails |
| Professional | $59/mo | 20,000 active prospects | 60,000 emails |
| Growth | $99/mo | 50,000 active prospects | 150,000 emails |
Source: Mailarrow Pricing
Pricing Analysis
Lemwarm is more affordable at the entry level ($29/mo vs $39/mo). For teams with tight budgets or those just getting started with email domain warming and deliverability and cold email outreach, this price difference matters.
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
- Unlimited Email Warmup
- Unlimited Mailboxes
- AI Personalization
- Sending mailbox rotation
- Detailed campaign analytics
- Bulk Prospects Import
- and 4 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
Mailarrow Key Features
- Unlimited Email Warmup
- Unlimited Mailboxes
- AI Personalization
- Sending mailbox rotation
- Detailed campaign analytics
- Bulk Prospects Import
- Custom properties
- Sending schedules
- Advanced tracking
- Reply tracking
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 Mailarrow
- Unlimited Email Warmup
- Unlimited Mailboxes
- AI Personalization
- Sending mailbox rotation
- Detailed campaign analytics
- Bulk Prospects Import
- Custom properties
- Sending schedules
- Advanced tracking
- Reply tracking
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).
Mailarrow Integrations
Mailarrow connects with: Gmail, Outlook, Zoho, Zapier, TrulyInbox.
Shared Integrations
Both tools integrate with: Gmail, Outlook.
Integrations listed only by Lemwarm: Google Workspace, Microsoft 365, SMTP, lemlist (native), HubSpot (via lemlist), Salesforce (via lemlist), Pipedrive (via lemlist).
Integrations listed only by Mailarrow: Zoho, Zapier, TrulyInbox.
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 Mailarrow
- Budget-conscious teams looking for an affordable cold email platform
- Teams that need a wide feature set (10 capabilities listed)
- Sales teams running high-volume outbound email campaigns
- Agencies managing multiple client outreach programs
Feature Comparison Summary
| Feature | Lemwarm | Mailarrow |
|---|---|---|
| Starting Price | $29/mo | $39/mo |
| Top Tier Price | Contact Sales | $99/mo |
| Total Features Listed | 8 | 10 |
| Integrations | 9 | 5 |
| Founded | 2018 | N/A |
Getting Started Checklist
- Define your email domain warming and deliverability and cold email outreach requirements and monthly budget
- Estimate your expected warmup email volume and email sending 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 serves the email domain warming and deliverability side of an outbound stack and Mailarrow the cold email outreach side. Lemwarm offers a more accessible entry point at $29/mo, while Mailarrow 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 Lemwarm and Mailarrow for current information.
Frequently asked questions.
Frequently asked questions- What is the difference between Lemwarm and Mailarrow?
- Lemwarm is an email warmup tool focused on building sender reputation and improving inbox placement through domain warming, while Mailarrow is a cold email platform built for sending outreach campaigns and generating replies. They address different parts of the outbound workflow, and many teams use both together.
- How much does Lemwarm cost compared to Mailarrow?
- Lemwarm's entry level Essential Plan starts at $29 per month, and its Smart Plan is $49 per month. Mailarrow's entry level Basic plan starts at $39 per month, with Professional at $59 per month and Growth at $99 per month, so Lemwarm has the lower entry price.
- Does Lemwarm come free with lemlist?
- Yes, Lemwarm is listed as free with any lemlist subscription. It also integrates natively with lemlist and, through lemlist, connects to HubSpot, Salesforce, and Pipedrive.
- Can Lemwarm and Mailarrow be used together?
- Yes, the article notes that many teams run one of each since Lemwarm focuses on domain warming and deliverability while Mailarrow focuses on sending and managing cold email campaigns. Both tools also share Gmail and Outlook integrations.
- What integrations does Mailarrow support?
- Mailarrow connects with Gmail, Outlook, Zoho, Zapier, and TrulyInbox. Of these, Gmail and Outlook are also supported by Lemwarm, while Zoho, Zapier, and TrulyInbox are listed only by Mailarrow.
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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