What is WarmupInbox?

WarmupInbox is an email deliverability tool. It automatically warms up mailboxes by exchanging and engaging with messages across a large network of inboxes, monitors blacklist and placement status, and reports a health score, so your sending domains build reputation and your cold and marketing emails avoid the spam folder.

WarmupInbox pricing (2026)

WarmupInbox plans and pricing, verified October 2026, are below. Pricing can change, so confirm the latest on the official WarmupInbox site. Prices are per inbox, and the per-inbox rate drops as you add inboxes. A free plan covers unlimited inboxes at 15 warmup emails a week.

PlanPriceBest for
Freemium$0Testing (15 warmup emails a week)
Basic$15/inbox/mo billed annually, or $19/inbox/mo billed monthlySolo senders
Pro$49/inbox/mo billed annually, or $59/inbox/mo billed monthlyGrowing teams
Max$79/inbox/mo billed annually, or $99/inbox/mo billed monthlyAgencies

Key features

  • Automated inbox warmup across a large network
  • Blacklist and placement monitoring
  • Inbox health scoring
  • Supports major mailbox providers and SMTP
  • Team and agency multi-inbox management

Who is WarmupInbox best for? (pros & cons)

Pros

  • Simple, focused warmup that improves placement
  • Affordable per-inbox pricing
  • Good blacklist and health monitoring

Cons

  • Priced per inbox, so big fleets add up
  • Warmup is not a fix for bad data or copy
  • Most useful alongside a sending tool

WarmupInbox vs alternatives

ToolStarting priceBest for
Warmy~$49/moDeliverability with placement testing and scoring
Smartlead~$39/moSender with warmup and inbox rotation built in

WarmupInbox: company snapshot

Quick reference details about WarmupInbox as a company. Figures marked estimated are third-party approximations and may change.

Founded2020
Employees1-10 (estimated)
HeadquartersPrague, Czech Republic
RevenueNot publicly disclosed
Products & servicesEmail warmup tool that automatically builds sender reputation and improves deliverability across a peer-to-peer inbox network.
Best forCold email and outbound sales teams protecting domain reputation
Websitewarmupinbox.com

Stack it with

WarmupInbox protects placement. Pair it with data and a sender to turn deliverability into meetings.

SenderSmartleadSend at volume across unlimited inboxes while reputation is protected.Verified dataUpLeadVerified emails reduce bounces that hurt sender reputation.CRMCloseManage the replies that better placement produces.