Open source alternative to Resend, Sendgrid, Postmark etc.
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Open source alternative to Resend, Sendgrid, Postmark etc.
AI-native open-source alternative to Vercel + Sentry + PostHog + Pingdom + Resend + E2B. 440+ CLI operations with drop-in skills for Claude Code, Codex & OpenCode — deployments, analytics, session replay, error tracking, OpenTelemetry, email, sandboxes & AI gateway in one self-hosted Rust binary.
Open-source transactional email API and self-hostable Resend alternative. SMTP, inbound mail, webhooks, and campaigns for developers.
Resend's Official Node.js SDK
This example shows how to use Resend with Next.js (App Router)
Agent Skills for working with Resend to send and receive emails.
Self-hosted email gateway between your apps and a transactional mail provider (Postmark, Resend, Mailgun, AWS SES, or outbound-SMTP). Three ingress shapes (HTTP form, HTTP API, SMTP). One Docker container, one TOML config.
Self-hosted multi-domain webmail on Cloudflare Workers, D1, R2, Queues, Email Routing, and Resend.
💌 Build and send emails using React