ROI calculator
Honest math. Drag the sliders.
Your setup
Mailboxes100
101,000
Sends / day · per mbox15
1020
Cold-email safe range. Sending more than 20/mailbox/day correlates with placement decline in our partner-program telemetry.
Your daily volume
1,500 sends/day
≈ 45,000 per month
Your annual savingsStart saving today →
$90,000
vs. running deliverability internally · 97% cheaper
With Inboxlee
$250/mo
$3,000 / year
DIY in-house
$7,750/mo
$93,000 / year
Breakdown · DIY monthly
Deliverability engineer (¼-time)$3,750IPs · pools · registrars$400Monitoring + seed tests$2,800Maintenance dev time$800
DIY estimate assumes a deliverability engineer at $180K/yr loaded cost working ¼-time on the function, pooled IP rental, monitoring stack (seed tests across major ESPs), and ongoing maintenance dev time scaling with mailbox count. Your real numbers may vary; we built the model from the costs we actually see when teams migrate.
FAQ