Self-hosted Resend alternative
Developer toolsFrom $149 / one-time paymentSelf-hosted
- Campaigns
- Sequences
- Transactional API
Best Mailgun Alternatives in 2026
8 similar tools you can use instead of Mailgun, with pricing and key features.
Mailgun
Transactional Email API Service For Developers
APIFree plan available
- Send emails
- Optimize emails
- Validate emails
- Inspect emails
Mailgun alternatives
Open-Source Transactional Email Platform
APIFree plan availableOpen SourceSelf-hosted
- Inbound Email
- Workflows
- Segments
Email infrastructure for platforms
APIFrom $0.50 / GB-month
- Sending API & SDKs
- Inbound/outbound mail & webhooks
- Cluster provisioning & inbox management
The email delivery service that people actually like
APIFree plan available
- Fast Delivery
- Deliverability & Inbox Placement
- Developer-Friendly API
Email for developers
APIFree plan available
- Modular Webhooks
- Test Mode
- Editor
SendGrid Email API and Email Marketing Campaigns
API
- Email API & SMTP
- Email campaigns
- Deliverability tooling
Communications APIs with AI and data for SMS, Voice, Email
APIFree plan available
- Messaging
- Voice
A complete email platform for Developers to Send, Receive & Reply
APIFrom $3.50/domain/mo / monthly
- Transactional Email Sending
- Threaded Email Reception
- AI Agent Integration for Email
Frequently Asked Questions
What is Mailgun?
Mailgun is an API tool: Transactional Email API Service For Developers. It has a free plan. Key features include Send emails, Optimize emails, Validate emails and Inspect emails.
Are there free alternatives to Mailgun?
Yes. Plunk, Postmark, Resend and Twilio have a free plan. Mailgun also has a free plan.
Is there an open-source alternative to Mailgun?
Yes. Plunk is open source.