Overview

Resend and Mailgun both serve developers building transactional email, but they take different approaches. Resend launched in 2023 with a focus on modern developer experience. Mailgun has been around since 2010, acquired by Sinch in 2021, and offers a more feature-rich but complex platform. If you need help comparing, check our Resend comparison and Mailgun comparison pages.

Developer Experience

Resend wins on simplicity. The API is clean, the SDKs are modern, and React Email support is first-class. Mailgun is more powerful but requires more configuration. If you value getting started fast, Resend is easier. If you need advanced routing or complex setups, Mailgun is more flexible. Both can be integrated into email campaigns and AI-powered sequences.

EU Hosting

Mailgun's biggest advantage for European companies is EU-hosted infrastructure. You can send from the US or EU from a single account. This matters for GDPR compliance and ensuring proper email deliverability. Resend doesn't offer EU hosting yet.

Pricing Changes

Note that Mailgun raised their Flex (pay-as-you-go) pricing from $1 to $2 per 1,000 emails in December 2025. This makes their pay-as-you-go option less competitive. Their monthly plans remain similar to Resend's pricing. For a complete breakdown, see our email guide for 2026.

Email Validation

Mailgun includes email validation in their Foundation and higher plans. Resend doesn't offer this feature. If you need to validate email addresses before sending, Mailgun saves you from needing a separate service.

The Sequenzy Alternative

If you're building a SaaS and need transactional email plus marketing campaigns, consider Sequenzy. We combine transactional emails, smart segmentation, and AI-powered sequences in one platform with native Stripe integration.