BrevoSend signup confirmations, password resets and other transactional emails through an API or SMTP.
Free: 300 emails/day · 1 user · Brevo branding
Websites & hosting
opensend.cc
Free softwareOpen sourceLocal
Send transactional emails through an API on infrastructure you control.
What you can use it for
Send transactional emails through an API on infrastructure you control.
- Drop-in API compatibility with official Resend client libraries.
- Bypasses daily 100-email free limits.
- Full source code ownership.
Workflow coverage and comparison notes
Open-source Resend-compatible transactional email API platform running on AWS SES, providing drop-in SDK compatibility without Resend’s markup fees.
Before you switch
Self-hosted service requiring Docker Compose, Convex, and your own AWS SES account credentials. You pay raw AWS SES rates ($0.10 per 1,000 emails) rather than an all-inclusive SaaS interface.
Alternatives to these paid apps
Each comparison covers the workflow described above, rather than every paid feature.
More for the same workflow
See alternatives →Brevo
PostalSend application email through SMTP or an HTTP API on your own infrastructure.
100% free open-source software (GPLv3). Unlimited emails, domains, and mail servers.