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Mailgun is a hosted email API with SMTP support, but developers may be looking for a different price model, campaign features or account policies. Reddit users report a free plan changing to a $35 monthly charge and a legitimate ecommerce account disabled after its first newsletter campaign. The alternatives below cover hosted APIs, SMTP relays and AWS email delivery. Starting prices are useful for shortlisting; compare expected volume, limits and migration requirements before moving production traffic.
01Why people leave Mailgun
Free-tier changes
One Reddit user says their free plan became a $35-per-month plan after they missed a notice. Treat free-tier terms as something to recheck.
Account access concerns
One Reddit thread describes a UK ecommerce account permanently disabled after its first newsletter campaign, despite the sender answering support questions.
Operational fit
A Reddit commenter calls Amazon SES unintuitive and says observing delivery can require configuring other AWS services. That may outweigh a low starting price.
02The alternatives, ranked by fit
- App email
ResendResendResend is positioned as a hosted email API for teams integrating email into an app and developers building transactional messages. It has a free plan, but its listed starting price is n/a, so model paid usage with the vendor before choosing it over Mailgun. Confirm API and SDK coverage, sending limits and how you will move templates and sending traffic.
Trade-off: The listed starting price does not give you a paid-usage estimate.
7.2/10from
Freefree plan - Transactional email
PostmarkPostmarkPostmark is a hosted email API for transactional messages, with inbound webhooks and the option to separate promotional streams. Its listed price starts at $15 and includes a free plan. Consider it if those capabilities fit your application better than Mailgun; confirm the volume tiers, SDKs, and migration path for your messages before switching.
Trade-off: Confirm volume pricing and migration details before committing.
7.8/10from
$15/mofree plan - AWS workloads
Amazon Simple Email Service (SES)Amazon Simple Email Service (SES)Amazon SES is a usage-priced AWS email service with a listed starting price of $0, making it worth evaluating for AWS teams focused on email spend. It is not presented as a drop-in developer experience: a Reddit commenter reports extra AWS services may be needed for observability. Check implementation and monitoring requirements alongside delivery costs.
Trade-off: AWS setup and observability may add operational work.
4.0/10from
Freefree plan - API and campaigns
Twilio SendGridTwilio SendGridTwilio SendGrid combines a hosted email API and campaign platform, with SMTP and API options for apps and teams running campaigns. Its listed price starts at $19.95, and its volume tiers are described as clear. Compare those tiers with your Mailgun usage, and review account-access concerns reported by developers before routing production email.
Trade-off: Developers have reported account-access concerns.
6.4/10from
$19.95/mo - Multichannel messaging
MailerSendMailerSendMailerSend is a hosted messaging service for transactional email, SMS and WhatsApp, with API or SMTP integration. Its listed price starts at $5.60 and includes a free plan. It may fit teams consolidating those message types, but compare the cost at your actual email volume and verify production limits and the APIs your code needs.
Trade-off: Verify costs and production limits for your workload.
7.2/10from
$5.60/mofree plan - SMTP relay
SMTP2GOSMTP2GOSMTP2GO is a managed email relay for applications replacing local SMTP relays, with reporting for low-volume senders. Its listed price starts at $10 and includes a free plan. If your Mailgun integration uses SMTP, compare the relay fit and expected volume; confirm API availability and sending limits before building around it.
Trade-off: Verify API coverage and sending limits before production.
7.4/10from
$10/mofree plan - Sending and testing
MailtrapMailtrapMailtrap combines a hosted email API and testing suite, with API or SMTP use and a free plan. Its listed price starts at $12. It suits teams evaluating sending and testing together; compare the free-tier limits and portability requirements with your Mailgun setup, then confirm how your existing messages and configuration can move.
Trade-off: Check free-tier limits and portability before committing.
7.7/10from
$12/mofree plan - Client-side templates
EmailJSEmailJSEmailJS is a hosted API layer for triggering templates through existing delivery providers. It is positioned for client-side apps and small projects, with a listed price starting at $7.20 and a free plan. Consider it when you want to switch delivery providers behind a template layer; check request limits and how that layer affects your provider migration.
Trade-off: It adds an API layer between your app and delivery provider.
7.3/10from
$7.20/mofree plan
03Side by side
| Tool | Score | From | Free plan | Best for |
|---|---|---|---|---|
 Mailgun Mailgun (current) | 7.1 | $15/mo | Yes | Apps sending transactional email |
| Resend Resend | 7.2 | Free | Yes | Apps sending transactional email |
| Postmark Postmark | 7.8 | $15/mo | Yes | Apps sending transactional email |
| Amazon Simple Email Service (SES) Amazon Simple Email Service (SES) | 4.0 | Free | Yes | AWS teams evaluating usage-based email |
| Twilio SendGrid Twilio SendGrid | 6.4 | $19.95/mo | No | Apps sending transactional email |
| MailerSend MailerSend | 7.2 | $5.60/mo | Yes | Apps sending transactional email |
| SMTP2GO SMTP2GO | 7.4 | $10/mo | Yes | Apps sending transactional email |
| Mailtrap Mailtrap | 7.7 | $12/mo | Yes | Teams needing sending and QA in one service |
| EmailJS EmailJS | 7.3 | $7.20/mo | Yes | Client-side apps sending templated email |
Questions people ask
Which Mailgun alternative is cheapest?
Amazon SES has the lowest listed starting price here, at $0, and is usage-priced. That does not establish your total cost. Estimate your sending volume and check the vendor's current rates and any AWS services needed for operations before comparing it with hosted plans.
Can I self-host a Mailgun alternative?
The alternatives here are presented as hosted services or AWS email delivery, not as self-hosted software. If self-hosting or an open-source licence is a requirement, confirm the deployment model, licence and data-export options with each vendor before planning a replacement.
What should I check before migrating from Mailgun?
Inventory whether your application sends through an API or SMTP, then compare the replacement's supported integration, SDKs, limits and pricing at your expected volume. Ask vendors how to move templates, sending configuration and delivery data, and test the new route before switching production traffic.