Warmbox
Warmbox is a pay-as-you-go inbox warmup: pick the provider (Gmail, Microsoft 365, Yahoo, iCloud, AOL, Zoho, ESP SMTP…), connect the mailbox, and run growth /…
OUR TAKE
Pick Warmbox for solo outbounders who want a $15–$19 warmer and will pick the provider themselves. No free tier.
Good fit
Solo outbounders who want a $15–$19 warmer and will pick the provider themselves.
Poor fit
Teams that need an expert on the plan (Mailwarm) or a sender with warmup included (Smartlead).
Solo (1 inbox, 50 emails/day, 1 member) $15 · 3 inboxes (250 emails/day, 3 members) $69 · 6 inboxes (500 emails/day, 6 members) $139
USD, before tax · Checked 2026-10-28 · warmbox.ai/pricing
OUR TAKE
Pick Warmbox for solo outbounders who want a $15–$19 warmer and will pick the provider themselves. No free tier. Confirm which $15 vs $19 cadence checkout uses.
Good fit
Solo outbounders who want a $15–$19 warmer and will pick the provider themselves.
Poor fit
Teams that need an expert on the plan (Mailwarm) or a sender with warmup included (Smartlead).
Solo (1 inbox, 50 emails/day, 1 member) $15 · 3 inboxes (250 emails/day, 3 members) $69 · 6 inboxes (500 emails/day, 6 members) $139
USD, before tax · Checked 2026-10-28 · warmbox.ai/pricing
What it costs
USD, before tax · Checked 2026-10-28 · warmbox.ai/pricing
Solo (1 inbox, 50 emails/day, 1 member)
and (two printed cards)
Lowest paid
$15
3 inboxes (250 emails/day, 3 members)
and
$69
6 inboxes (500 emails/day, 6 members)
and
$139
Enterprise / agency
Not published by the vendor
Not published by the vendor
Checked 2026-10-28·warmbox.ai/pricing
Before you pay
Good fit
Solo outbounders who want a $15–$19 warmer and will pick the provider themselves.
Poor fit
Teams that need an expert on the plan (Mailwarm) or a sender with warmup included (Smartlead).
Watch out
No free tier. Confirm which $15 vs $19 cadence checkout uses.
Instead, try
MailReach if per-mailbox warmer with spam-test credits when you want health charts; Lemwarm if warmup + DNS checks when you already live near lemlist
Compare Warmbox with
Limits, in full
- 01
No free tier. Confirm which $15 vs $19 cadence checkout uses.
- 02
Caps are per plan. (50 / 250 / 500 emails/day) — a heavy warmup week hits the ceiling.
- 03
Not a placement-test lab. Use GlockApps for seed-list inbox/spam/%.
If Warmbox isn't it
Why: per-mailbox warmer with spam-test credits when you want health charts.
Paid only$19.50
Slider HTML may show a large estimated totalChecked 2026-10-28·mailreach.co/pricing
vs Warmbox
Why: warmup + DNS checks when you already live near lemlist.
Paid only$29/mo yearly
Priced per emailChecked 2026-10-28·lemwarm.com/pricing
vs WarmboxLimits & alternatives3 limits · MailReach, Lemwarm instead
Limits, in full
- 01
No free tier. Confirm which $15 vs $19 cadence checkout uses.
- 02
Caps are per plan. (50 / 250 / 500 emails/day) — a heavy warmup week hits the ceiling.
- 03
Not a placement-test lab. Use GlockApps for seed-list inbox/spam/%.
If Warmbox isn't it
Why: per-mailbox warmer with spam-test credits when you want health charts.
Paid only$19.50
Slider HTML may show a large estimated totalChecked 2026-10-28·mailreach.co/pricing
vs WarmboxWhy: warmup + DNS checks when you already live near lemlist.
Paid only$29/mo yearly
Priced per emailChecked 2026-10-28·lemwarm.com/pricing
vs Warmbox