Compare/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.

Starting price

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

DetailInboxEagleWarmbox
Starting price$39/mo$15/mo
Free tier–No–No
MCP server–No–No
Public API–No–No
Listed underDeliverabilityDeliverability

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 $99/mo for 100 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 for brands at any list size, or $19/mo for agencies. Seed List Testing starts at $99/mo for 100 seeds (agencies from $79/mo). DMARC Processing starts at $99/mo for 10,000 profiles. 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 4 Nov 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 4 Nov 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.

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Editorial listings, never paid rankings. Prices checked 4 Nov 2026. Confirm current terms on the vendor site. Spot an error?