Boost Inbox vs Warmforge: Email Warmup Tool Comparison
Compare Boost Inbox and Warmforge side by side. See pricing, features, and integrations to choose the right email warmup tool for your needs.
Boost Inbox is the more affordable email warmup tool at $5/mo entry pricing, offering automated warmup, human review, and status reports. Warmforge starts at $12/mo per mailbox slot and adds AI-written warmup emails, a Heat Score per mailbox, and DNS, MX, and blacklist health checks with placement tests.
Key takeaways
- Boost Inbox starts at $5/mo for its Starter plan covering one mailbox with 50 daily positive engagements.
- Warmforge's Email Warm Up plan costs $12/mo per slot, with one free slot and one free placement test per month included.
- Warmforge's Placement Tests Pro Plan costs $39/mo for 100 tests covering up to 50 mailboxes per test.
- Warmforge's Placement Tests Growth Plan costs $169/mo for unlimited tests covering up to 250 mailboxes per test.
- Boost Inbox integrates with Gmail, GSuite, Outlook 365, Yahoo Mail, Amazon SES, and SMTP, while Warmforge integrates with Google Workspace, Microsoft 365, Gmail, Outlook, Salesforge, and Mailforge.
Reviewed and updated September 2, 2026
Boost Inbox vs Warmforge: Email Warmup Tool Comparison
Sales teams evaluating email domain warming and deliverability tools often narrow their shortlist to Boost Inbox and Warmforge. 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 Warmforge lists email warm up and monitoring & health checks. 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 Warmforge at $12/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.
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
Starter
Email Warm Up (per slot)
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
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
Boost Inbox is more affordable at the entry level ($5/mo vs $12/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
- Email Warm Up
- Monitoring & Health Checks
- Placement Tests
- Deliverability Boost
- Always-On Warm Up
- Heat Score per mailbox
- 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
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 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 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
Boost Inbox Integrations
Boost Inbox connects with: Gmail, GSuite, Outlook 365, Yahoo Mail, Amazon SES, SMTP.
Warmforge Integrations
Warmforge connects with: Google Workspace, Microsoft 365, Gmail, Outlook, Salesforge (native), Mailforge (native).
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 Warmforge: Google Workspace, Microsoft 365, Outlook, Salesforge (native), Mailforge (native).
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 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 | Boost Inbox | Warmforge |
|---|---|---|
| Starting Price | $5/mo | $12/mo |
| Top Tier Price | $19/mo | $169/mo |
| Total Features Listed | 8 | 8 |
| Integrations | 6 | 6 |
| Founded | N/A | 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
Boost Inbox and Warmforge both serve the email domain warming and deliverability market. Boost Inbox offers a more accessible entry point at $5/mo, while Warmforge starts at $12/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 Warmforge for current information.
Frequently asked questions.
Frequently asked questions- Which is cheaper, Boost Inbox or Warmforge?
- Boost Inbox is cheaper at the entry level, starting at $5/mo compared to Warmforge's $12/mo per mailbox slot. Boost Inbox's Starter plan covers one mailbox for warmup, while Warmforge's entry plan covers one mailbox slot and includes one free placement test per month.
- What is the main difference between Boost Inbox and Warmforge?
- Boost Inbox sends realistic emails from your inbox daily and relies on human review and status reports, while Warmforge uses AI-written emails and tracks a per-mailbox Heat Score. Warmforge also adds DNS, MX, and blacklist health checks plus placement tests, which Boost Inbox does not list.
- Does Warmforge offer placement testing?
- Yes, Warmforge includes placement tests as a core listed feature. Its entry Email Warm Up plan includes one free placement test per month, and separate Placement Tests Pro and Growth plans cost $39/mo and $169/mo respectively for higher volumes of tests.
- What email providers do Boost Inbox and Warmforge integrate with?
- Boost Inbox integrates with Gmail, GSuite, Outlook 365, Yahoo Mail, Amazon SES, and SMTP. Warmforge integrates with Google Workspace, Microsoft 365, Gmail, Outlook, and its own native tools Salesforge and Mailforge. Both tools share Gmail as a common integration.
- Is Boost Inbox or Warmforge better for agencies managing multiple client domains?
- The article lists agencies managing warmup across multiple client domains as a best fit use case for both Boost Inbox and Warmforge. The right choice for an agency depends on budget and whether features like AI-written emails and Heat Score tracking, offered by Warmforge, matter more than Boost Inbox's lower entry price.
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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