Mailgun Review 2026
Transactional Email Delivery Service & API for Developers
What is Mailgun?
Mailgun is a transactional email delivery service and API built for developers, enabling apps to send, track, validate, and inspect emails at scale. It also offers deliverability optimization and email validation tools, serving over 150,000 businesses.
Best for
Mixed
Use cases
- Sending transactional/app emails
- Email validation
- Improving deliverability
- Email QA and rendering tests
Key features
Transactional email sending API and SMTP
Email validation API
Deliverability optimization (Mailgun Optimize)
Email previewing/inspection (Email on Acid)
Inbound message parsing and webhooks
Pricing
Model
freemium
Price range
Free tier sends up to 100 emails/day; paid plans and enterprise options available.
Free tier
Yes
Integrations
Mailgun integrates with 3 tools including:
CRM integrationsSMTPREST API
Market position
Market score
23
Share of voice
Category rank
#71 of 117
GTM Developer Tools
60-day move
-55
Places moved
Notable customers
MicrosoftAmerican ExpressWikipediaLyftNHLSubstackDribbble
Market data from Adam's GTM Report.
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