Head to head

InboxEagle vs Warmbox

Same facts, side by side: starting price, free tier, MCP, API and what each one is actually built for.

InboxEagle

$39/mo

InboxEagle monitors inbox placement, authentication, and blocklists from $39/mo flat, any list size, with 10 seed inboxes included on Email Deliverability.

Where InboxEagle fits

Klaviyo senders who want inbox placement and DNS alerts without a consultant
Agencies watching several brands from one command center
Teams that need seed-list folder movement beyond the included 10 inboxes
High-volume senders who also want a monthly deliverability retainer

Warmbox

$15/mo

Warmbox runs automated email warmup to lift sender reputation. The listing floor is $15/mo.

Where Warmbox fits

New domains that need a warmup network before cold volume
Solo senders who want a dedicated warmup tool under $20/mo
Agencies warming many client inboxes on a low per-box bill
Teams that already sequence in Instantly and want a second warmup opinion

At a glance

Detail	InboxEagle	Warmbox
Starting price	$39/mo	$15/mo
Free tier	–No	–No
MCP server	–No	–No
Public API	–No	–No
Listed under	Deliverability	Deliverability

Where they pull apart

InboxEagle

Stands out: The $39/mo Email Deliverability SKU is flat regardless of list size, and bundles Google Postmaster, Klaviyo campaign sync, SPF/DKIM/DMARC alerts, and an AI agent that opens incidents when placement breaks.

Watch out: Ten seeds are included. Extra seed-list panels start at $49/mo for 25 seeds. DMARC aggregate processing and Audience Selection are separate SKUs. Consulting retainers start at $499/mo.

Not the right fit for

Cold-email inbox warmup shops (this is monitoring, not infrastructure or warmup)
Senders who need 200+ seed tests in the $39 SKU. That is a separate seed-list product

Warmbox

Stands out: $15/mo is the cheapest dedicated warmup listing in this set, below Mailreach's $20/mo and well below Folderly's $79/mo monitor.

Watch out: Warmup is not sending. You still need a sequencer. Results take weeks, and a burned domain will not be saved by a $15 plan alone.

Not the right fit for

Buyers who want inbox-placement analytics, not a warmup bot
Teams that expect warmup to replace authentication and list hygiene

Pros and cons

InboxEagle

Email Deliverability is $39/mo flat, any list size, with 10 seeds
Klaviyo plus Google Postmaster on the monitoring SKU
AI incident agents open and close placement/authentication issues

Only 10 seeds in the $39 plan. Larger panels are extra
DMARC volume processing and audience AI are separate subscriptions
No published product trial on monitoring. Consulting gets a 30-minute scoping call

Warmbox

Published $15/mo listing, low for a dedicated warmup network
Unbundled from any one sequencer
Simple job: reputation, not campaigns

Does not send campaigns or host mailboxes
Overlap with Instantly and Smartlead bundled warmup
Will not rescue a domain with a broken DMARC record

What each one costs

InboxEagle

$39/mo

Email Deliverability is $39/mo flat, any list size, with 10 seed inboxes, Postmaster, Klaviyo sync, and authentication alerts. Seed List Testing starts at $49/mo for 25 seeds. DMARC Processing starts at $20/mo. Audience Selection starts from $39/mo. Consulting retainers: Growing $499, Established $999, Enterprise $1,999 per month. Confirm current terms on the vendor site.

Checked 19 Sep 2026

Warmbox

$15/mo

Warmbox lists from $15/mo for automated email warmup. Confirm live per-mailbox versus flat pricing and any volume packs on the vendor pricing page. Confirm current terms on the vendor site.

Checked 19 Sep 2026

Common questions

Is InboxEagle cheaper than Warmbox?

Warmbox starts lower, at $15/mo against $39/mo for InboxEagle. That is the entry plan on each side, so the real number depends on seats and the tier you land on.

Can you try InboxEagle or Warmbox for free?

Neither carries a free tier on our listing.

Not the pair you wanted?

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Editorial listings, never paid rankings. Prices checked 19 Sep 2026. Confirm current terms on the vendor site. Spot an error?