Warmup Inbox and InboxWarm both start at $15/inbox/month for a single inbox. InboxWarm's volume pricing advantage kicks in as inbox count grows, dropping to $5/inbox at scale. The key differentiator is InboxWarm's active spam recovery engine, which goes beyond standard warmup to rescue emails from spam in real time. Your choice depends on inbox count and whether active recovery matters more than a flat per-inbox rate.
Feature-by-Feature Comparison
Every key feature compared side-by-side. Green badges = InboxWarm wins.
Starting Price (1 inbox)
- InboxWarm
- $15/inbox/mo
- Warmup Inbox
- $15/inbox/mo
Pricing at 10 inboxes
- InboxWarm
- $80/mo ($8/inbox)
- Warmup Inbox
- $150/mo ($15/inbox)
Pricing at 50 inboxes
- InboxWarm
- $300/mo ($6/inbox)
- Warmup Inbox
- $750/mo ($15/inbox)
Volume Discounts
- InboxWarm
- Up to 67% off
- Warmup Inbox
- Available on higher plans
Free Trial
- InboxWarm
- 10 days · No CC required
- Warmup Inbox
- Limited
AI-Powered Replies
- InboxWarm
- LLM-driven
- Warmup Inbox
- Yes
Spam Recovery Engine
- InboxWarm
- Active real-time
- Warmup Inbox
- Passive / diagnostic
Spam Testing / Diagnostics
- InboxWarm
- Basic health checks
- Warmup Inbox
- Advanced (paid add-on)
Inbox Placement Tracking
- InboxWarm
- Yes
- Warmup Inbox
- Advanced
Domain Health Monitoring
- InboxWarm
- Real-time
- Warmup Inbox
- SPF/DKIM checks
Inbox Network
- InboxWarm
- Private seed network
- Warmup Inbox
- Real inbox network
Gmail & Outlook Support
- InboxWarm
- Both
- Warmup Inbox
- Both
SMTP / IMAP Support
- InboxWarm
- Yes
- Warmup Inbox
- Yes
Platform Lock-in
- InboxWarm
- None
- Warmup Inbox
- None
Setup Time
- InboxWarm
- 2 minutes
- Warmup Inbox
- Standard setup
| Feature | InboxWarm | Warmup Inbox |
|---|---|---|
| Starting Price (1 inbox) | $15/inbox/mo | $15/inbox/mo |
| Pricing at 10 inboxes | $80/mo ($8/inbox) | $150/mo ($15/inbox) |
| Pricing at 50 inboxes | $300/mo ($6/inbox) | $750/mo ($15/inbox) |
| Volume Discounts | Up to 67% off | Available on higher plans |
| Free Trial | 10 days · No CC required | Limited |
| AI-Powered Replies | LLM-driven | Yes |
| Spam Recovery Engine | Active real-time | Passive / diagnostic |
| Spam Testing / Diagnostics | Basic health checks | Advanced (paid add-on) |
| Inbox Placement Tracking | Yes | Advanced |
| Domain Health Monitoring | Real-time | SPF/DKIM checks |
| Inbox Network | Private seed network | Real inbox network |
| Gmail & Outlook Support | Both | Both |
| SMTP / IMAP Support | Yes | Yes |
| Platform Lock-in | None | None |
| Setup Time | 2 minutes | Standard setup |
Warmup Inbox Pricing vs InboxWarm
See exactly how costs stack up at every inbox count.
1 inbox
- InboxWarm / Mo
- $15/mo
- Warmup Inbox / Mo
- $15/mo
5 inboxes
- InboxWarm / Mo
- $55/mo
- Warmup Inbox / Mo
- $75/mo
10 inboxes
- InboxWarm / Mo
- $80/mo
- Warmup Inbox / Mo
- $150/mo
25 inboxes
- InboxWarm / Mo
- $150/mo
- Warmup Inbox / Mo
- $375/mo
You Save / Yr+$2700
50 inboxes
- InboxWarm / Mo
- $300/mo
- Warmup Inbox / Mo
- $750/mo
100 inboxes
- InboxWarm / Mo
- $500/mo
- Warmup Inbox / Mo
- $1,500/mo
You Save / Yr+$12,000
| Inbox Count | InboxWarm / Mo | Warmup Inbox / Mo | You Save / Yr |
|---|---|---|---|
| 1 inbox | $15/mo | $15/mo | — |
| 5 inboxes | $55/mo | $75/mo | — |
| 10 inboxes | $80/mo | $150/mo | — |
| 25 inboxes | $150/mo | $375/mo | +$2700 |
| 50 inboxes | $300/mo | $750/mo | — |
| 100 inboxes | $500/mo | $1,500/mo | +$12,000 |
Best Value at Scale
InboxWarm
Volume pricing that rewards growth
10-day trial · Cancel anytime · 2-minute setup
Warmup Inbox
Warmup Inbox
Per-inbox pricing from $15/inbox/month
Warmup Inbox pricing sourced from public website, May 2026. Subject to change.
InboxWarm becomes more cost-efficient than Warmup Inbox at higher inbox counts thanks to aggressive volume discounts. At 25 inboxes, InboxWarm ($150/mo) vs Warmup Inbox ($375/mo) saving $2700/year. All InboxWarm features included at every tier no add-ons required.
Who Should Choose Which?
A fair, data-driven breakdown to help you decide.
Choose InboxWarm if…
- You manage 5+ inboxes and want significantly lower per-inbox costs
- You want active spam recovery alongside warmup (not just reporting)
- You want a 10-day free trial with no credit card required
- You need reliable warmup without paying for diagnostic extras
- You want 2-minute setup with no technical configuration
- You're an agency scaling across many client inboxes
Consider Warmup Inbox if…
- You have 1–5 inboxes where Warmup Inbox’s $15/inbox rate beats InboxWarm’s entry price
- You want a lower entry-level cost for a small inbox setup
- You need basic warmup without the active spam recovery features
- A 7-day free trial is sufficient to evaluate the tool before committing
Key Differences, Explained
The details that matter most when choosing between the two tools.
Volume Pricing The Biggest Financial Difference
Warmup Inbox and InboxWarm both start at $15/inbox/month. From two inboxes up, InboxWarm's volume pricing takes over: at 25 inboxes, InboxWarm costs $150/month vs Warmup Inbox's $375/month. At 100 inboxes, InboxWarm costs $500/month vs Warmup Inbox's $1,500/month — an annual saving of $12,000. For agencies and growing teams, InboxWarm's volume discounts ultimately deliver more value.
Spam Testing vs Spam Recovery Two Different Philosophies
Warmup Inbox's standout feature is its spam testing capability it sends test emails and shows you where they land across major providers, flagging content triggers, authentication issues, and keyword problems. This is powerful for diagnosing deliverability issues. InboxWarm takes a different approach with its active spam recovery engine: it actively detects and rescues warmup emails from spam folders in real time, generating positive engagement signals that improve placement over time. Diagnostics tell you what's wrong; active recovery fixes it continuously.
Inbox Placement Diagnostics
If you're experiencing persistent deliverability issues and need detailed content-level analysis checking specific words, subject lines, or HTML patterns against spam filters Warmup Inbox's diagnostics are more granular and provider-specific. InboxWarm focuses on warmup execution, domain health monitoring, and active spam recovery rather than providing manual content-level spam scoring. The right choice depends on whether you need a diagnostic tool or an automated warmup engine.
Free Trial & Barrier to Entry
InboxWarm offers a 10-day free trial with no credit card required and full feature access connect, warm up, and verify results before you commit a cent. Warmup Inbox's trial access is more restricted. If you're evaluating email warmup tools, the ability to test the full product risk-free for 10 days is a meaningful advantage when deciding which tool to adopt for your stack.
Stop Guessing. Start Landing in the Inbox.
Improve your email deliverability with real engagement signals and full visibility into where your emails actually land.
Free 10-day trial · No credit card · Cancel anytime
Frequently Asked Questions
Warmup Inbox and InboxWarm both start at $15/inbox/month for a single inbox, but InboxWarm gets cheaper per inbox as you scale. At 25 inboxes: InboxWarm $150/month vs Warmup Inbox $375/month. At 100 inboxes: InboxWarm $500/month vs Warmup Inbox $1,500/month a saving of $12,000/year. For agencies managing 10+ inboxes, InboxWarm’s volume pricing makes it more cost-efficient overall.
InboxWarm has three main advantages over Warmup Inbox: (1) Volume pricing that becomes more cost-efficient at 10+ inboxes, with discounts up to 67% for agencies; (2) An active spam recovery engine that rescues emails from spam folders in real time rather than just warming; (3) A 10-day free trial with no credit card required (vs Warmup Inbox’s 7-day trial).
InboxWarm is the better choice for agencies managing 10+ inboxes. At 25 inboxes: InboxWarm $150/month vs Warmup Inbox $375/month saving $2,700/year. At 100 inboxes the annual saving is $12,000. All InboxWarm features are included at every pricing tier, with no additional add-on costs.
Yes. InboxWarm connects via Gmail OAuth or SMTP/IMAP credentials in under 2 minutes with no technical configuration required. Start a 10-day free trial with no credit card to test InboxWarm before cancelling your Warmup-Inbox subscription there is no migration risk or downtime.
Nothing is lost. The sender reputation you built with Warmup Inbox lives with your domain and inbox, not with the tool, so it carries over when you switch. InboxWarm picks up from your current reputation and continues strengthening inbox placement without resetting your progress.
Yes. Switching is straightforward: connect your inboxes via Gmail or Outlook OAuth or SMTP/IMAP in under two minutes, with no DNS changes or data export from Warmup Inbox required. Start a 10-day free trial with no credit card to run InboxWarm before cancelling Warmup Inbox, so there's no downtime or migration risk.
It's not recommended. Running two warmup tools on one inbox can double the warmup volume and send conflicting engagement signals, which can confuse mailbox providers and hurt reputation. Pause Warmup Inbox on that inbox before warming it with InboxWarm for clean, reliable results.