Boost Inbox vs Yet Another Mail Merge: Email Warmup Tool vs Cold Email Platform Comparison
Compare Boost Inbox (email warmup tool) and Yet Another Mail Merge (cold email platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Boost Inbox is an email warmup tool for building sender reputation and inbox placement, starting at $5/mo. Yet Another Mail Merge is a cold email platform for sending Gmail-based mail merge campaigns, starting free. They solve different problems: Boost Inbox warms up domains before sending, while Yet Another Mail Merge sends and tracks the campaigns themselves. Many teams use both together.
Key takeaways
- Boost Inbox pricing starts at $5/mo for the Starter plan covering 1 mailbox for warmup with 50 daily positive engagements.
- Yet Another Mail Merge has a Free plan allowing up to 20 recipients per day, with paid tiers at $6/mo and $12/mo unlocking up to 1,500 recipients per day.
- Yet Another Mail Merge offers 4 pricing tiers compared to Boost Inbox's 3 tiers.
- Both tools integrate with Gmail, but Boost Inbox also connects with GSuite, Outlook 365, Yahoo Mail, Amazon SES, and SMTP.
- Yet Another Mail Merge sends through the user's own Gmail or Google Workspace account, so daily volume is capped by that account.
Reviewed and updated September 4, 2026
Boost Inbox vs Yet Another Mail Merge: Email Warmup Tool vs Cold Email Platform Comparison
Boost Inbox (email warmup tool) and Yet Another Mail Merge (cold email platform) sit next to each other in many outbound stacks. They are not substitutes for each other on every job, so this comparison covers pricing, features, and integrations for each and points out where the two meet.
The Quick Answer
Boost Inbox is an email warmup tool for email domain warming and deliverability; Yet Another Mail Merge is a cold email platform for cold email outreach. By each vendor's own wording, Boost Inbox lists email warmup and fully automated, and Yet Another Mail Merge lists schedule mail merges and launch follow-up campaigns.
Yet Another Mail Merge offers a lower entry point at $0/mo compared to Boost Inbox at $5/mo.
If your priority is building sender reputation and improving inbox placement, Boost Inbox is the one built for it; for sending campaigns that land in the inbox and generate replies, that is Yet Another Mail Merge. Many teams run one of each.
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.
Yet Another Mail Merge is Mail merge for Gmail that sends mass personalized email from a Google Sheet and tracks opens, clicks, responses, bounces and unsubscribes in real time from the sheet. Sending goes through the user's own Gmail or Google Workspace account, so daily volume is capped by that account.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Starter
Free
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
Yet Another Mail Merge Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Free | Free | 1 user | Up to 20 recipients / day |
| Pro gmail.com | $6/mo | 1 user | Up to 400 recipients / day |
| Pro Google Workspace | $12/mo | 1 user | Up to 1,500 recipients / day |
| Team | $12/mo | 5 Workspace accounts | Up to 1,500 recipients / day / user |
Source: Yet Another Mail Merge Pricing
Pricing Analysis
Yet Another Mail Merge offers the lower entry point ($0/mo vs $5/mo). Teams watching their budget will appreciate the savings, especially when starting out.
Yet Another Mail Merge offers 4 pricing tiers compared to Boost Inbox's 3, giving you more granularity as you scale.
Yet Another Mail Merge includes a free tier, which is helpful for evaluating the platform without upfront cost.
Features Breakdown
- Email Warmup
- Fully Automated
- Status Reports
- Human Review
- Premium Support
- Realistic emails sent from your inbox daily
- and 2 more listed below
- Schedule mail merges
- Launch follow-up campaigns
- Track opens and clicks
- Track email responses
- Send using an alias
- Add personalized attachments
- and 4 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
Yet Another Mail Merge Key Features
- Schedule mail merges
- Launch follow-up campaigns
- Track opens and clicks
- Track email responses
- Send using an alias
- Add personalized attachments
- Automatic over-quota splitting
- Send Google Form email notifications
- Create one-click surveys
- Follow up in the same thread
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 Yet Another Mail Merge
- Schedule mail merges
- Launch follow-up campaigns
- Track opens and clicks
- Track email responses
- Send using an alias
- Add personalized attachments
- Automatic over-quota splitting
- Send Google Form email notifications
- Create one-click surveys
- Follow up in the same thread
Integration Ecosystem
Boost Inbox Integrations
Boost Inbox connects with: Gmail, GSuite, Outlook 365, Yahoo Mail, Amazon SES, SMTP.
Yet Another Mail Merge Integrations
Yet Another Mail Merge connects with: Gmail, Google Workspace, Google Sheets, Google Contacts, Google Forms.
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 Yet Another Mail Merge: Google Workspace, Google Sheets, Google Contacts, Google Forms.
Use Case Recommendations
Best Fit for Boost Inbox
- Budget-conscious teams looking for an affordable email warmup tool
- Organizations with complex tech stacks needing broad integration support (6 integrations)
- Teams launching new email domains for outreach
- Organizations recovering from deliverability issues
Best Fit for Yet Another Mail Merge
- Budget-conscious teams looking for an affordable cold email platform
- Teams that need a wide feature set (10 capabilities listed)
- Teams that want to start free and scale up as needs grow
Feature Comparison Summary
| Feature | Boost Inbox | Yet Another Mail Merge |
|---|---|---|
| Starting Price | $5/mo | Free |
| Top Tier Price | $19/mo | $12/mo |
| Total Features Listed | 8 | 10 |
| Integrations | 6 | 5 |
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
Boost Inbox serves the email domain warming and deliverability side of an outbound stack and Yet Another Mail Merge the cold email outreach side. Yet Another Mail Merge offers a more accessible entry point, while Boost Inbox starts at $5/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 Yet Another Mail Merge for current information.
Frequently asked questions.
Frequently asked questions- What is the difference between Boost Inbox and Yet Another Mail Merge?
- Boost Inbox is an email warmup tool that gradually increases sending activity to build sender reputation and keep emails out of spam. Yet Another Mail Merge is a cold email platform that sends mass personalized emails from a Google Sheet and tracks opens, clicks, and responses. They address different stages of the outbound email process.
- How much does Boost Inbox cost?
- Boost Inbox starts at $5/mo for the Starter plan, which covers 1 mailbox for warmup with 50 daily positive engagements. The Team plan is $9/mo for 3 mailboxes, and the Premium plan is $19/mo for 8 mailboxes, each offering 50 daily positive engagements per mailbox.
- Is Yet Another Mail Merge free?
- Yes, Yet Another Mail Merge offers a Free plan that allows up to 20 recipients per day for 1 user. Paid plans start at $6/mo for a Pro gmail.com account with up to 400 recipients per day, and go up to $12/mo for Pro Google Workspace or Team plans with up to 1,500 recipients per day.
- Can I use Boost Inbox and Yet Another Mail Merge together?
- Yes, the article notes that many teams run one of each. Boost Inbox warms up sender reputation and inbox placement while Yet Another Mail Merge handles sending and tracking cold email campaigns, so they can complement each other in an outbound stack.
- What integrations does each tool support?
- Boost Inbox connects with Gmail, GSuite, Outlook 365, Yahoo Mail, Amazon SES, and SMTP. Yet Another Mail Merge connects with Gmail, Google Workspace, Google Sheets, Google Contacts, and Google Forms. Gmail is the only integration shared between the two tools.
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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