Short answer: E-Warmup is the more complete email deliverability tool. Warmbox handles automated email warmup only, with no inbox placement testing, no sender reputation monitoring, no AI blacklist removal, and no free plan. E-Warmup includes all of these.
Warmbox Solo: $19/month, 1 inbox, 50/day. Warmbox Start-up: $79/month, 3 inboxes, 250/day shared. No free plan or trial. E-Warmup Growth: $99/month, 3 mailboxes, 300/day per mailbox, plus Free Forever access.
The deliverability feature scope is the main story. E-Warmup includes:
25 inbox placement tests/month on Growth (Warmbox: none)
AI-powered blacklist removal that protects email domain reputation (Warmbox: detection only)
Continuous sender reputation tracking across providers (Warmbox: spam score only)
Warmup bounce protection to prevent sender reputation damage (Warmbox: none)
On volume, E-Warmup Growth sends 300 warmup emails per day per mailbox. Warmbox Start-up sends 250/day shared across 3 inboxes, roughly 83 per inbox. For cold email deliverability, faster ramp matters.
The Solo plan at $19/month is the cheapest single-inbox automated email warmup option for users who don't need reputation monitoring or placement testing. Their warmup recipes concept (ramp-up, recovery, maintenance modes) is also useful for scenario-specific email warmup strategies.
Plan | E-Warmup | Warmbox |
Entry | Free Forever | $19 (Solo) |
3 mailboxes | $99 (300/day each) | $79 (250/day shared) |
5 mailboxes | $189 (Premium) | $159 (6 inboxes) |
Free plan | Free Forever | None |
For email warmup software that protects deliverability with placement testing, reputation monitoring, and blacklist removal in one tool, E-Warmup is the more complete platform. Start free at e-warmup.com.
