Open Source Alternatives to SendGrid

Billion Mail

AGPL-3.0

Self-hosted email marketing platform with unlimited sending, AI-powered email creation, real-time analytics, and no monthly fees. Complete SMTP solution.

Hyvor Post

AGPL-3.0

Create and send newsletters with complete privacy protection. No tracking, no data collection - just simple, clean email delivery with customizable templates and archive sites.

Keila

AGPL-3.0

Self-hosted newsletter platform with powerful features, data protection, and full control over your mailing lists and campaigns.

Plunk

AGPL-3.0

Plunk unifies marketing, transactional, and broadcast emails into a single, complete solution for businesses of all sizes.

Postal

MIT

Self-hosted email delivery platform with powerful features for transactional and bulk emails, offering full control and customization.

Sendportal

MIT

Open-source email marketing platform offering unlimited subscribers, campaigns, and workspaces. Self-hosted solution with powerful API and beautiful interface.

Sendune

MIT

A comprehensive platform for managing transactional and marketing emails through AWS SES, featuring customer data management, SMS capabilities, and workflow automation.

useSend

AGPL-3.0

Open source email platform for transactional and marketing emails. Self-host or use cloud service with transparent pricing - pay only for emails sent.

Wraps

Unknown

Build email templates as React components and automations in TypeScript. Deploy to your AWS account with SES integration. Marketing teams edit content without code.

DoubleZero

AGPL-3.0

00 is an open-source email API and infrastructure solution that allows developers to own and control their email stack.

Hyvor Relay

AGPL-3.0

Self-hosted email API alternative to AWS SES & Mailgun. Open-source AGPL-3.0 with enterprise features, automated deliverability, and cloud version coming 2026.

Sessy

Unknown

Track SES deliveries, bounces, opens and clicks in a self-hosted dashboard with real-time search, analytics and reputation monitoring.