Growbots vs Warmup Inbox: Cold Email Platform vs Email Warmup Tool Comparison
Compare Growbots (cold email platform) and Warmup Inbox (email warmup tool) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Growbots is a cold email platform built for finding prospects and running outbound campaigns, while Warmup Inbox is a dedicated email warmup tool built for building sender reputation and inbox placement. Growbots starts free at $0/mo, Warmup Inbox starts at $19/mo. Many teams run both together rather than choosing one over the other.
Key takeaways
- Growbots offers a free Freemium plan while Warmup Inbox's entry Basic plan costs $19/mo.
- Growbots lists access to a database of over 180 million prospects and email verification on import as key features.
- Warmup Inbox exchanges email with a network of more than 30,000 real inboxes to build sender reputation.
- Growbots has 3 pricing tiers (Freemium, Starter Outreach at $29/mo, Pro Outreach at $39/mo) while Warmup Inbox has 4 tiers (Basic, Pro at $59/mo, Max at $99/mo, and a custom Agency plan).
- Growbots integrates with Salesforce, HubSpot, Zapier, Gmail, Outlook, SMTP, and IMAP, while Warmup Inbox integrates with Gmail and Workspace, Outlook and Microsoft 365, Zoho Mail, Amazon SES, Mailgun, SendGrid, and Sendinblue.
Reviewed and updated September 2, 2026
Growbots vs Warmup Inbox: Cold Email Platform vs Email Warmup Tool Comparison
Growbots (cold email platform) and Warmup Inbox (email warmup tool) 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
Growbots is a cold email platform for cold email outreach; Warmup Inbox is an email warmup tool for email domain warming and deliverability. By each vendor's own wording, Growbots lists explore database of 180m+ prospects and email verification on import, and Warmup Inbox lists email warmup and cold email sequence.
Growbots offers a lower entry point at $0/mo compared to Warmup Inbox at $19/mo.
If your priority is sending campaigns that land in the inbox and generate replies, Growbots is the one built for it; for building sender reputation and improving inbox placement, that is Warmup Inbox. Many teams run one of each.
Understanding the Core Difference
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.
Warmup Inbox is Email warmup service that exchanges natural-looking email with a network of more than 30,000 real inboxes to build sender reputation automatically. Also offers cold email sequences, language warmup, ESP warmup and IP warmup from the same dashboard.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Freemium
Basic
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
Warmup Inbox Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Basic | $19/mo | per inbox | 75 warmup messages/day |
| Pro | $59/mo | per inbox | 250 warmup messages/day |
| Max | $99/mo | per inbox | 1,000 warmup messages/day |
| For agencies & teams | Contact Sales | Custom plans starting at 15 inboxes | custom |
Source: Warmup Inbox Pricing
Pricing Analysis
Growbots is more affordable at the entry level ($0/mo vs $19/mo). For teams with tight budgets or those just getting started with cold email outreach and email domain warming and deliverability, this price difference matters.
Warmup Inbox offers 4 pricing tiers compared to Growbots's 3, giving you more granularity as you scale.
Growbots includes a free tier, letting you test the platform before committing financially.
Features Breakdown
- 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
- Email warmup
- Cold email sequence
- Language warmup
- ESP warmup tool
- IP warmup
- Spam & Category monitoring
- and 3 more listed below
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
Warmup Inbox Key Features
- Email warmup
- Cold email sequence
- Language warmup
- ESP warmup tool
- IP warmup
- Spam & Category monitoring
- Email reputation Check
- Human-like AI generated content
- Developers API
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 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
Listed only by Warmup Inbox
- Email warmup
- Cold email sequence
- Language warmup
- ESP warmup tool
- IP warmup
- Spam & Category monitoring
- Email reputation Check
- Human-like AI generated content
- Developers API
Integration Ecosystem
Growbots Integrations
Growbots connects with: Salesforce, HubSpot, Zapier, Gmail, Outlook, SMTP, IMAP.
Warmup Inbox Integrations
Warmup Inbox connects with: Gmail & Workspace, Outlook & Microsoft 365, Zoho Mail, Amazon SES, Mailgun, SendGrid, Sendinblue (Brevo), Any inbox with SMTP.
Integrations listed only by Growbots: Salesforce, HubSpot, Zapier, Gmail, Outlook, SMTP, IMAP.
Integrations listed only by Warmup Inbox: Gmail & Workspace, Outlook & Microsoft 365, Zoho Mail, Amazon SES, Mailgun, SendGrid, Sendinblue (Brevo), Any inbox with SMTP.
Use Case Recommendations
Best Fit for Growbots
- 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
Best Fit for Warmup Inbox
- Budget-conscious teams looking for an affordable email warmup tool
- Organizations with complex tech stacks needing broad integration support (8 integrations)
- Enterprise buyers who prefer custom pricing and dedicated support
Feature Comparison Summary
| Feature | Growbots | Warmup Inbox |
|---|---|---|
| Starting Price | Free | $19/mo |
| Top Tier Price | $39/mo | Contact Sales |
| Total Features Listed | 10 | 9 |
| Integrations | 7 | 8 |
| Founded | 2014 | N/A |
Getting Started Checklist
- Define your cold email outreach and email domain warming and deliverability requirements and monthly budget
- Estimate your expected email sending volume and 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
Growbots serves the cold email outreach side of an outbound stack and Warmup Inbox the email domain warming and deliverability side. Growbots offers a more accessible entry point, while Warmup Inbox starts at $19/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 Growbots and Warmup Inbox for current information.
Frequently asked questions.
Frequently asked questions- What is the main difference between Growbots and Warmup Inbox?
- Growbots is a cold email platform focused on finding prospects and automating outbound campaigns, while Warmup Inbox is an email warmup tool focused on building sender reputation and improving inbox placement. They address different parts of the same outbound email workflow, and many teams use both together.
- Which is cheaper, Growbots or Warmup Inbox?
- Growbots is cheaper at the entry level with a free Freemium plan at $0/mo, compared to Warmup Inbox's Basic plan starting at $19/mo. Growbots' paid tiers are Starter Outreach at $29/mo and Pro Outreach at $39/mo, while Warmup Inbox scales up to a Pro plan at $59/mo and a Max plan at $99/mo.
- Can I use Growbots and Warmup Inbox together?
- Yes, the article notes that many teams run one of each since they solve different problems. Growbots handles finding prospects and sending campaigns, while Warmup Inbox handles warming up sending domains and monitoring sender reputation, so they can complement each other in the same outbound stack.
- Does Growbots include its own email warmup feature?
- Yes, Growbots lists Gradual Automatic Warmup as one of its own features alongside prospecting and campaign tools. However, Warmup Inbox is built specifically for warmup and offers a deeper feature set for it, including language warmup, ESP warmup, IP warmup, and spam and category monitoring.
- What integrations does each platform support?
- Growbots integrates with Salesforce, HubSpot, Zapier, Gmail, Outlook, SMTP, and IMAP. Warmup Inbox integrates with Gmail and Workspace, Outlook and Microsoft 365, Zoho Mail, Amazon SES, Mailgun, SendGrid, Sendinblue (Brevo), and any inbox with SMTP.
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 La Growth Machine: Cold Email Platform vs Sales Engagement Platform Comparison
Compare Growbots (cold email platform) and La Growth Machine (sales engagement platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Growbots vs Salesforge: Cold Email Platform vs Sales Engagement Platform Comparison
Compare Growbots (cold email platform) and Salesforge (sales engagement platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Mailmeteor vs Reply.io: Cold Email Platform Comparison
Compare Mailmeteor and Reply.io side by side. See pricing, features, and integrations to choose the right cold email platform for your needs.
Emelia vs Manyreach: Cold Email Platform Comparison
Compare Emelia and Manyreach side by side. See pricing, features, and integrations to choose the right cold email platform for your needs.
Emelia vs Salesforge: Cold Email Platform vs Sales Engagement Platform Comparison
Compare Emelia (cold email platform) and Salesforge (sales engagement platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
GMass vs PlusVibe: Cold Email Platform Comparison
Compare GMass and PlusVibe side by side. See pricing, features, and integrations to choose the right cold email platform for your needs.