Compare email APIs
Side-by-side comparisons of Retransmit, Resend, useSend, Plunk, and eusend. Pricing, features, deliverability, and self-hosting, checked against each vendor's own pages.
Resend alternatives
Four Resend alternatives compared on price, features, and self-hosting: Retransmit, useSend, Plunk, and eusend. Includes a full pricing table checked on September 1, 2026.
Open source email APIs
Retransmit, useSend, and Plunk are open source email platforms you can self-host. This comparison covers licenses, cloud pricing, features, and what self-hosting actually takes.
Retransmit vs Resend
Retransmit and Resend compared: pricing models, sending features, webhooks, deliverability, and self-hosting. An honest table of what each does that the other does not.
Retransmit vs useSend
Retransmit and useSend are both open source email platforms built on Amazon SES. This comparison covers pricing, marketing features, SDKs, webhooks, and self-hosting.
Retransmit vs Plunk
Retransmit and Plunk compared: transactional focus vs all-in-one marketing, pricing per thousand emails, webhooks, automations, and what self-hosting looks like for each.
Retransmit vs eusend
Retransmit and eusend compared: prepaid credits vs EU-metered plans, batch sending, webhooks, SDKs, and data residency. Both are transactional-first email APIs.