Boost Inbox vs Yesware: Email Warmup Tool vs Cold Email Platform Comparison
Compare Boost Inbox (email warmup tool) and Yesware (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, while Yesware is a cold email platform for sales outreach with a free plan and paid tiers at $19/mo, $45/mo, and $85/mo. Teams needing deliverability use Boost Inbox; teams sending campaigns use Yesware, and many use both.
Key takeaways
- Boost Inbox's Starter plan costs $5/mo for 1 mailbox, while Yesware's Free plan costs $0/mo for 10 campaign recipients per month.
- Yesware offers four pricing tiers (Free, Pro at $19/mo, Premium at $45/mo, Enterprise at $85/mo) compared to Boost Inbox's three tiers at $5/mo, $9/mo, and $19/mo.
- Boost Inbox integrates with Gmail, GSuite, Outlook 365, Yahoo Mail, Amazon SES, and SMTP.
- Yesware integrates with Gmail, Outlook, Salesforce, LinkedIn, Zoom, and Microsoft Teams.
- The only integration shared by both tools is Gmail.
Reviewed and updated September 2, 2026
Boost Inbox vs Yesware: Email Warmup Tool vs Cold Email Platform Comparison
Boost Inbox (email warmup tool) and Yesware (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; Yesware is a cold email platform for cold email outreach. By each vendor's own wording, Boost Inbox lists email warmup and fully automated, and Yesware lists email open and attachment tracking and email templates and shared templates.
Yesware 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 Yesware. 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.
Yesware is Email tracking and sales engagement tool for Gmail and Outlook with campaigns, templates, meeting scheduler, and Salesforce integration.
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
Yesware Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Free | Free | 10 campaign recipients/month | Basic tracking |
| Pro | $19/mo | 20 campaign recipients/month | Unlimited tracking |
| Premium | $45/mo | Unlimited campaigns | Unlimited tracking |
| Enterprise | $85/mo | Unlimited campaigns | Unlimited tracking |
Source: Yesware Pricing
Pricing Analysis
Yesware offers the lower entry point ($0/mo vs $5/mo). Teams watching their budget will appreciate the savings, especially when starting out.
Yesware offers 4 pricing tiers compared to Boost Inbox's 3, giving you more granularity as you scale.
Yesware 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
- Email open and attachment tracking
- Email templates and shared templates
- Campaign sequences with automation
- Meeting scheduler
- Personal and team reporting
- Salesforce inbox sidebar (Enterprise)
- 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
Yesware Key Features
- Email open and attachment tracking
- Email templates and shared templates
- Campaign sequences with automation
- Meeting scheduler
- Personal and team reporting
- Salesforce inbox sidebar (Enterprise)
- Bi-directional Salesforce sync (Enterprise)
- Single sign-on (Enterprise)
- 14-day free trial on paid plans
- Yesware University training
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 Yesware
- Email open and attachment tracking
- Email templates and shared templates
- Campaign sequences with automation
- Meeting scheduler
- Personal and team reporting
- Salesforce inbox sidebar (Enterprise)
- Bi-directional Salesforce sync (Enterprise)
- Single sign-on (Enterprise)
- 14-day free trial on paid plans
- Yesware University training
Integration Ecosystem
Boost Inbox Integrations
Boost Inbox connects with: Gmail, GSuite, Outlook 365, Yahoo Mail, Amazon SES, SMTP.
Yesware Integrations
Yesware connects with: Gmail, Outlook, Salesforce, LinkedIn, Zoom, Microsoft Teams.
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 Yesware: Outlook, Salesforce, LinkedIn, Zoom, Microsoft Teams.
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 Yesware
- 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 | Yesware |
|---|---|---|
| Starting Price | $5/mo | Free |
| Top Tier Price | $19/mo | $85/mo |
| Total Features Listed | 8 | 10 |
| Integrations | 6 | 6 |
| Founded | N/A | 2010 |
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 Yesware the cold email outreach side. Yesware 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 Yesware for current information.
Frequently asked questions.
Frequently asked questions- What is the main difference between Boost Inbox and Yesware?
- Boost Inbox is an email warmup tool focused on domain warming and deliverability, while Yesware is a cold email platform focused on sales outreach campaigns. They cover different parts of the outbound workflow, with Boost Inbox protecting inbox placement and Yesware handling campaign sending and tracking.
- How much does Boost Inbox cost?
- Boost Inbox has three plans: Starter at $5/mo for 1 mailbox, Team at $9/mo for 3 mailboxes, and Premium at $19/mo for 8 mailboxes. Each plan includes 50 daily positive engagements per mailbox for warmup.
- How much does Yesware cost?
- Yesware offers a free plan with 10 campaign recipients per month and basic tracking. Paid tiers are Pro at $19/mo, Premium at $45/mo, and Enterprise at $85/mo, with the paid tiers unlocking unlimited campaigns and unlimited tracking.
- Can I use both Boost Inbox and Yesware together?
- Yes, many teams run one of each since Boost Inbox focuses on deliverability and sender reputation while Yesware focuses on outreach campaigns and email tracking. Both tools connect with Gmail, so they can be used side by side within the same outbound workflow.
- Which integrations do Boost Inbox and Yesware have in common?
- The two tools share only one common integration: Gmail. Beyond that, Boost Inbox connects with GSuite, Outlook 365, Yahoo Mail, Amazon SES, and SMTP, while Yesware connects with Outlook, Salesforce, LinkedIn, Zoom, and Microsoft Teams.
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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