Email Deliverability Tools

Mailgun vs Warmup Inbox

Compare Mailgun and Warmup Inbox side-by-side. See feature differences and pricing in the Email Deliverability Tools category.

Most Features

Mailgun

by Sinch

0.0 (0)

Pricing: Free for 100 emails/day; Send from $15/mo for 10,000 emails; Optimize add-on from $49/mo; Inspect add-on from $99/mo. Billed monthly only, checked September 2026.

Mailgun is a transactional email API and SMTP relay for developers, with paid add-ons for deliverability monitoring, pre-send QA and email validation.

14 /16 features Full profile

Warmup Inbox

by itrinity

0.0 (0)

Pricing: Per inbox, per month: Basic $15 (75 warm-ups/day), Pro $49 (250/day), Max $79 (1,000/day). 15+ inboxes need a Custom quote. 7-day trial, no card.

Warmup Inbox builds a mailbox's sender reputation with real traffic across a 30,000+ inbox network, then reports placement and reputation, priced per inbox.

8 /16 features Full profile

Feature Comparison

Email Deliverability Tools features side-by-side

Feature	Mailgun 14/16 features	Warmup Inbox 8/16 features
Inbox placement testing Seed-list tests that show whether a message lands in the inbox, promotions tab or spam at each major mailbox provider.	Yes	Yes
DMARC report analytics Collects DMARC aggregate reports and turns them into a dashboard of sending sources and pass rates.	Yes	No
Blocklist monitoring Checks sending IPs and domains against public blocklists on a schedule and alerts on a listing.	Yes	Yes
IP and domain reputation monitoring Tracks reputation scores for sending IPs and domains over time from providers and public sources.	Yes	Yes
Google Postmaster Tools integration Pulls domain reputation, spam rate and authentication data from Google Postmaster Tools.	Yes	No
Automated mailbox warm-up Exchanges and engages with mail across a network of inboxes to build a new sender's reputation automatically.	No	Yes
Bounce and complaint monitoring Tracks bounce and complaint rates per stream or campaign and alerts past a threshold.	Yes	No
Real-time deliverability alerts Sends email, Slack or webhook alerts when placement, reputation or a blocklist status changes.	Yes	No
SPF, DKIM and DMARC checker Validates the sending domain's authentication records and flags misconfiguration.	Yes	Yes
Content and link checks Flags spam-trigger content, broken links, blocklisted URLs and a missing unsubscribe link before a send.	Yes	Yes
Deliverability testing API Runs placement tests and pulls results programmatically.	Yes	Yes
Sending platform integrations Connects to sending platforms such as Mailchimp, HubSpot, Klaviyo or SendGrid so tests run on real campaigns.	No	Yes
Multiple sender domains Monitors several sending domains or sender profiles under one account.	Yes	No
Deliverability trend reports Placement and reputation history over weeks and months, exportable for a client or a manager.	Yes	No
Email header analysis Parses a received message's headers to show the delivery path, delays and authentication results.	Yes	No
Feedback loop monitoring Subscribes to mailbox-provider complaint feedback loops and reports the complainers.	Yes	No
Overall Rating	0.0 0 reviews	0.0 0 reviews

Mailgun 14/16 features

Inbox placement testing: Yes
DMARC report analytics: Yes
Blocklist monitoring: Yes
IP and domain reputation monitoring: Yes
Google Postmaster Tools integration: Yes
Automated mailbox warm-up: No
Bounce and complaint monitoring: Yes
Real-time deliverability alerts: Yes
SPF, DKIM and DMARC checker: Yes
Content and link checks: Yes
Deliverability testing API: Yes
Sending platform integrations: No
Multiple sender domains: Yes
Deliverability trend reports: Yes
Email header analysis: Yes
Feedback loop monitoring: Yes

0.0

(0)

Warmup Inbox 8/16 features

Inbox placement testing: Yes
DMARC report analytics: No
Blocklist monitoring: Yes
IP and domain reputation monitoring: Yes
Google Postmaster Tools integration: No
Automated mailbox warm-up: Yes
Bounce and complaint monitoring: No
Real-time deliverability alerts: No
SPF, DKIM and DMARC checker: Yes
Content and link checks: Yes
Deliverability testing API: Yes
Sending platform integrations: Yes
Multiple sender domains: No
Deliverability trend reports: No
Email header analysis: No
Feedback loop monitoring: No

0.0

(0)

Pricing

Mailgun

Free for 100 emails/day; Send from $15/mo for 10,000 emails; Optimize add-on from $49/mo; Inspect add-on from $99/mo. Billed monthly only, checked September 2026.

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Warmup Inbox

Per inbox, per month: Basic $15 (75 warm-ups/day), Pro $49 (250/day), Max $79 (1,000/day). 15+ inboxes need a Custom quote. 7-day trial, no card.

View plans

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