Email Deliverability Tools

Litmus vs Mailgun

Litmus and Mailgun are email deliverability tools for teams that want their messages to reach the inbox. Litmus is built for designing and approving campaigns that another platform sends, while Mailgun is built to send application email through code. Enterprise email teams and agencies suit Litmus. Developers who run transactional mail suit Mailgun.

Litmus
Litmus

by Validity

No reviews yet

Pricing: No public prices; sold as part of Validity Engage and quoted by the sales team

Litmus is an email testing and deliverability tool for marketing teams that previews campaigns across clients and monitors inbox placement, owned by Validity.

7 /16 features Full profile
No reviews yet

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.

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

Feature Comparison

Email Deliverability Tools features side-by-side

Litmus
Litmus 7/16 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
No
Bounce and complaint monitoring
No
Real-time deliverability alerts
Yes
SPF, DKIM and DMARC checker
Yes
Content and link checks
Yes
Deliverability testing API
No
Sending platform integrations
Yes
Multiple sender domains
No
Deliverability trend reports
No
Email header analysis
No
Feedback loop monitoring
No
No reviews yet
Mailgun
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
No reviews yet

Pricing

Litmus

No public prices; sold as part of Validity Engage and quoted by the sales team

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.

Which Should You Choose?

Choose Litmus if you send high-volume campaigns through a platform like Marketo or HubSpot and want each draft built and approved before launch. Choose Mailgun if you build software that must send receipts and alerts by API. Mailgun has a free plan, then paid plans billed by the month.

An email designer or deliverability specialist at a large sender gets one workspace in Litmus. It offers a code and visual editor plus a review and approval workflow that routes drafts to stakeholders before launch. Email analytics adds read time and Dark Mode data to engagement reports. Litmus sits beside the sending platform rather than replacing it, so a team still needs a separate sender to deliver the mail.

A developer wiring receipts and password resets into an application starts with Mailgun. It sends through a programming interface or a mail relay and parses inbound replies into the application. It also turns domain authentication reports into a view of sending sources. The application still decides what gets sent, and campaigns built in a drag-and-drop editor come from a separate Sinch product.

Litmus's users praise reporting and engagement tracking, plus previews and test sends that are easy to use. Some customers complain of billing disputes, with charges continuing after a trial and refunds refused. Mailgun's reviewers like fast support that fixes problems, including for users who do not pay. Reviewers also find it easy to integrate with an application, and mail is delivered well. Others report an account or domain disabled with little explanation, and support slow or unhelpful on setup.

Litmus describes a digital marketing agency that builds bespoke email for clients, and the agency simplified its workflow from code collaboration to client approval, testing and analytics. The result was higher deliverability, less time per campaign and more accurate emails. One Mailgun customer, an ecommerce marketing platform, relies on the service for email delivery and domain verification at scale. The result is that the platform removes the domain verification email flow entirely.

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