Sent – A unified API for sending messages across SMS, RCS, and apps like WhatsApp.

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Open Source Email Platforms using GitHub

A curated collection of the best open source platforms for hosting your own email sending infrastructure. using GitHub.

Hyvor Relay

Open-source email API with enterprise deliverability

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700
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35
Last commit
17 hours ago

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

Open Source Alternative to:

Resend

AgentMail

Email inbox API built for AI agents and workflows

Stars
37
Forks
15
Last commit
20 hours ago

Provides AI agents with real email inboxes via REST API. Create inboxes instantly, send and receive messages, search threads, and handle attachments programmatically.

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Stars
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