Boost Inbox vs Growbots: Email Warmup Tool vs Cold Email Platform Comparison
Compare Boost Inbox (email warmup tool) and Growbots (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 that gradually builds sender reputation and inbox placement, starting at $5/mo, while Growbots is a cold email platform for finding prospects and running outbound campaigns, with a free tier and paid plans from $29/mo. They cover different workflow stages, so many teams use both together.
Key takeaways
- Boost Inbox starts at $5/mo for the Starter plan with 1 mailbox for warmup and 50 daily positive engagements.
- Growbots offers a Freemium plan at $0/mo with 20 email accounts, 3 sequences, and up to 20 emails per email daily.
- Growbots Starter Outreach costs $29/mo and includes unlimited email accounts, unlimited sequences, and up to 100 emails per email daily.
- Growbots gives access to a database of over 180 million prospects with email verification on import.
- Both Boost Inbox and Growbots integrate with Gmail and SMTP, though Boost Inbox also connects with GSuite, Outlook 365, Yahoo Mail, and Amazon SES.
Reviewed and updated September 2, 2026
Boost Inbox vs Growbots: Email Warmup Tool vs Cold Email Platform Comparison
Sales teams building an outbound stack often weigh Boost Inbox, an email warmup tool for email domain warming and deliverability, against Growbots, 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
Boost Inbox is an email warmup tool for email domain warming and deliverability; Growbots is a cold email platform for cold email outreach. By each vendor's own wording, Boost Inbox lists email warmup and fully automated, and Growbots lists explore database of 180m+ prospects and email verification on import.
Growbots 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 Growbots. 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.
Growbots is Cold email software that finds prospects in a 180M+ contact database, warms up sending inboxes and automates outbound email campaigns. Also sells a Concierge service in which its own team runs the outbound process.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Starter
Freemium
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
Growbots Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Freemium | Free | Basic Filters; partial access to the 180M+ prospect database | 20 email accounts; 3 sequences; up to 20 per email daily |
| Starter Outreach | $29/mo | Credits (Per Propsect) From $0.13 | Unlimited email accounts; unlimited sequences; up to 100 per email daily |
| Pro Outreach | $39/mo | Credits (Per Propsect) From $0.13 | Unlimited email accounts; unlimited sequences; up to 500 per email daily |
Source: Growbots Pricing
Pricing Analysis
Growbots offers the lower entry point ($0/mo vs $5/mo). Teams watching their budget will appreciate the savings, especially when starting out.
Growbots 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
- Explore Database of 180M+ Prospects
- Email Verification on Import
- Gradual Automatic Warmup
- Custom Tracking Domain
- Spintax Formulas
- A/B Testing
- 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
Growbots Key Features
- Explore Database of 180M+ Prospects
- Email Verification on Import
- Gradual Automatic Warmup
- Custom Tracking Domain
- Spintax Formulas
- A/B Testing
- Shared Inbox
- Out-Of-Office Rescheduling
- Warm Replies Detection
- Email Templates Generator
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 Growbots
- Explore Database of 180M+ Prospects
- Email Verification on Import
- Gradual Automatic Warmup
- Custom Tracking Domain
- Spintax Formulas
- A/B Testing
- Shared Inbox
- Out-Of-Office Rescheduling
- Warm Replies Detection
- Email Templates Generator
Integration Ecosystem
Boost Inbox Integrations
Boost Inbox connects with: Gmail, GSuite, Outlook 365, Yahoo Mail, Amazon SES, SMTP.
Growbots Integrations
Growbots connects with: Salesforce, HubSpot, Zapier, Gmail, Outlook, SMTP, IMAP.
Shared Integrations
Both tools integrate with: Gmail, SMTP.
Integrations listed only by Boost Inbox: GSuite, Outlook 365, Yahoo Mail, Amazon SES.
Integrations listed only by Growbots: Salesforce, HubSpot, Zapier, Outlook, IMAP.
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 Growbots
- Budget-conscious teams looking for an affordable cold email platform
- Teams that need a wide feature set (10 capabilities listed)
- Organizations with complex tech stacks needing broad integration support (7 integrations)
- Teams that want to start free and scale up as needs grow
Feature Comparison Summary
| Feature | Boost Inbox | Growbots |
|---|---|---|
| Starting Price | $5/mo | Free |
| Top Tier Price | $19/mo | $39/mo |
| Total Features Listed | 8 | 10 |
| Integrations | 6 | 7 |
| Founded | N/A | 2014 |
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 Growbots the cold email outreach side. Growbots 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 Growbots for current information.
Frequently asked questions.
Frequently asked questions- What is the main difference between Boost Inbox and Growbots?
- Boost Inbox is an email warmup tool focused on email domain warming and deliverability, while Growbots is a cold email platform focused on cold email outreach using a prospect database. Boost Inbox helps build sender reputation; Growbots helps find prospects and send campaigns that generate replies.
- Which is cheaper, Boost Inbox or Growbots?
- Growbots has a lower entry point with a Freemium plan at $0/mo, compared to Boost Inbox's Starter plan at $5/mo. However, Growbots' paid plans start at $29/mo for Starter Outreach, while Boost Inbox's highest listed plan, Premium, is $19/mo.
- Do I need both Boost Inbox and Growbots?
- Many teams run one of each, since the tools cover different parts of the outbound workflow. Boost Inbox focuses on building sender reputation and inbox placement, while Growbots focuses on prospecting and sending campaigns, so they can complement rather than replace each other.
- What integrations does Boost Inbox support?
- Boost Inbox connects with Gmail, GSuite, Outlook 365, Yahoo Mail, Amazon SES, and SMTP. It shares Gmail and SMTP integrations with Growbots, but Growbots additionally offers Salesforce, HubSpot, Zapier, Outlook, and IMAP integrations that Boost Inbox does not list.
- What does Growbots offer that Boost Inbox does not?
- Growbots lists features such as exploring a database of 180 million or more prospects, email verification on import, custom tracking domains, spintax formulas, A/B testing, shared inbox, out of office rescheduling, warm replies detection, and an email templates generator, none of which appear on Boost Inbox's own feature list.
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
Connect on LinkedIn →Explore more.
Ready to scale your outreach?
We build GTM engines that book real meetings. See the receipts.
Related articles.
Growbots vs MailHeat: Cold Email Platform vs Email Warmup Tool Comparison
Compare Growbots (cold email platform) and MailHeat (email warmup tool) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
GetSales.io vs Yet Another Mail Merge: Sales Engagement Platform vs Cold Email Platform Comparison
Compare GetSales.io (sales engagement platform) 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.
Enginy vs Success.ai: Sales Engagement Platform vs Cold Email Platform Comparison
Compare Enginy (sales engagement platform) and Success.ai (cold email platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Artisan vs Yet Another Mail Merge: Sales Engagement Platform vs Cold Email Platform Comparison
Compare Artisan (sales engagement platform) 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.
Hexospark vs JustCall: Cold Email Platform vs Sales Engagement Platform Comparison
Compare Hexospark (cold email platform) and JustCall (sales engagement platform). See pricing, features, and integrations to decide which one, or both, your stack needs.
EmailBison vs Emelia: Cold Email Platform Comparison
Compare EmailBison and Emelia side by side. See pricing, features, and integrations to choose the right cold email platform for your needs.