SendGrid

Hosted email delivery service for transactional and marketing mail, over SMTP and an HTTP API. Un producto cerrado de Twilio.

Comparativa

5 alternativas de código abierto a SendGrid
Herramienta	Sustitución	Estrellas	Licencia	Condiciones	Autoalojable	Lenguaje	Última versión	Último push
Postal	Sustitución completa	17k	MIT	Código abierto	Sí	Ruby	3.3.7	2026-10-06
useSend	Sustitución completa	4.7k	AGPL-3.0	Código abierto	Sí	TypeScript	v1.9.8	2026-09-08
Haraka	Parcial	5.6k	MIT	Código abierto	Sí	JavaScript	v3.3.4	2026-10-03
Plunk	Parcial	5.5k	AGPL-3.0	Código abierto	Sí	TypeScript	v0.15.0	2026-10-06
Hyvor Relay	Parcial	911	AGPL-3.0	Código abierto	Sí	PHP	0.0.46	2026-09-30

5 alternativas

📮 A fully featured open source mail delivery platform for incoming & outgoing e-mail

Sends and receives mail over SMTP and an HTTP API, with delivery tracking and webhooks.

Open source alternative to Resend, Sendgrid, Postmark etc.

Transactional and marketing email over a REST API and SMTP, with webhooks and delivery stats, sent through Amazon SES.

A fast, highly extensible, and event driven SMTP server

A plugin-based SMTP server in Node.js for high-volume inbound and outbound mail, without an HTTP API or tracking dashboard.

The Open-Source Email Platform

Transactional email over an HTTP API next to campaigns and automations, sent through Amazon SES.

📨 Open-Source Email API for Developers. Cloud & Self-hosted Alternative to SES, Mailgun, SendGrid.

Transactional sending over an HTTP API and SMTP with bounce handling and webhooks; no marketing campaigns.