Dedicated sending infrastructure
Run outbound mailboxes on isolated VPS and IP capacity instead of stacking hundreds of Google or Outlook seats.
Send more cold emails without paying per inbox.
Replace expensive Google Workspace and Outlook mailbox stacks with dedicated SMTP/IMAP infrastructure, automated DNS, and operator-grade monitoring.
$99/mo
Start with one dedicated sending IP
$0
No per-inbox tax as your mailbox count grows
SMTP/IMAP
Connect to Smartlead, Instantly, PlusVibe, and more
Cold email infrastructure
The infrastructure layer your sequencer expects.
Smartlead, Instantly, PlusVibe, and similar tools need working SMTP and IMAP accounts. InboxScaler gives agencies those accounts, the DNS records behind them, and the visibility to operate them at scale.
Unlimited mailbox mindset
Provision SMTP/IMAP accounts for every domain and client without paying a separate monthly fee for each inbox.
DNS and reputation visibility
Monitor SPF, DKIM, DMARC, MX, TLS, queues, server health, and transport events from one operator dashboard.
Savings
Stop turning every cold-email inbox into another SaaS bill.
Traditional cold-email stacks often start with Google Workspace or Outlook seats at roughly $9 per inbox each month. That works for a few accounts. It gets painful when an agency needs 50, 100, or 300 inboxes across clients.
Examples use $9 per mailbox for traditional workspace pricing and compare against the closest InboxScaler plan by infrastructure capacity.
Mailbox count
Google / Outlook
InboxScaler
Monthly savings
50 inboxes
$450/mo
$99/mo
$351/mo
100 inboxes
$900/mo
$99/mo
$801/mo
300 inboxes
$2,700/mo
$299/mo
$2,401/mo
Comparison
Built for agencies that already know cold email.
InboxScaler is not a CRM, copywriter, or campaign scheduler. It is the infrastructure control plane for teams that need affordable mailboxes, dedicated IP capacity, and clean SMTP/IMAP credentials.
Google Workspace / Outlook
$9-ish per mailbox turns 100 inboxes into roughly $900 every month
Flat infrastructure pricing built for cold-email operators
Inframail
$129 for 1 IP or $327 for 3 IPs on comparable cold-email infrastructure plans
$99 for 1 IP or $299 for 5 IPs, with the same unlimited inbox mindset
Mailgun / SendGrid
Usage billing, opt-in policies, and platform-level account risk
Dedicated SMTP/IMAP infrastructure customers connect to their own outbound tools
Workflow
From domain to connected cold-email inbox.
Buy or bring domains, provision mailboxes, copy credentials into your sender, then watch the infrastructure signals that actually come from the mail servers.
- 1 Add your outbound domains and publish simple DNS records
- 2 Provision SMTP/IMAP mailboxes without buying Google or Outlook seats
- 3 Export credentials into Smartlead, Instantly, PlusVibe, or your existing sender
- 4 Track DNS readiness, transport events, queues, and server health as you scale
Plans
Flat monthly infrastructure, not per-inbox rent.
Every plan keeps the unlimited domains and inboxes mindset. Pick the dedicated IP capacity that matches your agency volume.
Starter
$99/mo
1 dedicated IP for founders and small outbound teams.
Expert
$299/mo
5 dedicated IPs for agencies managing multiple clients.
Agency
$699/mo
15 dedicated IPs for higher-volume cold-email operations.
Scale
$1,499/mo
40 dedicated IPs for teams pushing serious monthly volume.
FAQ
The important questions before moving infrastructure.
Can I replace Google Workspace or Outlook for cold email?
For outbound infrastructure, yes. InboxScaler provisions SMTP/IMAP mailboxes you can connect to external sending tools, so you do not need to buy a Google or Outlook seat for every cold-email inbox.
Does InboxScaler send campaigns?
No. InboxScaler is the mailbox, DNS, server, and monitoring layer. Campaign sequencing, prospect lists, copy, warmup, and replies stay in tools like Smartlead, Instantly, and PlusVibe.
Do I pay more when I create more inboxes?
The product is priced around dedicated IP capacity, not per-seat mailbox billing. That is the main cost advantage for agencies running dozens or hundreds of inboxes.
Why would an agency need multiple dedicated IPs?
Multiple IPs let operators spread client volume, isolate reputation risk, and keep infrastructure organized as monthly sending volume grows.
Ready to stop overpaying for cold-email inboxes?
Create an account and start organizing the domains, mailboxes, dedicated IPs, and health checks that power your outbound infrastructure.