Mailflare
A free, self-hosted email inbox for a custom domain — deploy it to your own Cloudflare account and get a working mailbox for you@yourdomain.com, without renting inbox space from Gmail or a paid email host.
🔗 Visit Mailflare
Description
Getting a real inbox at your own domain (you@yourcompany.com instead of you@gmail.com) usually means paying a monthly fee to Google Workspace or a similar hosted email provider, just to store and serve your messages. Mailflare takes a different route: it deploys as your own app on Cloudflare's infrastructure — which offers a generous free tier — so you get a real inbox, sending, and organization for your domain, but you're the one hosting it rather than renting it.
Mailflare is an open-source, self-hosted email inbox platform built specifically on Cloudflare's stack: Cloudflare Workers for the app logic, D1 for the database, R2 for attachment storage, Email Routing for receiving mail, and Durable Objects for real-time WebSocket notifications when new mail arrives. It supports standard folders (inbox, sent, drafts, spam, trash), email composition with autosave, attachments up to 20MB combined, an API for sending outbound mail programmatically, AI-assisted message summarization and triage, and one-click deployment directly to a Cloudflare account. With nearly 800 GitHub stars and active recent development, it's a young but real project aimed squarely at developers comfortable running their own infrastructure.
💬 Our review
The short version: Mailflare is a clever, genuinely free way to get a real inbox on your own domain if you're comfortable deploying to Cloudflare — it turns Cloudflare's free-tier infrastructure into your own private email service instead of paying a monthly fee to a hosted provider.
Building specifically on Cloudflare's primitives (Workers, D1, R2, Email Routing, Durable Objects) rather than running a traditional mail server is the smart part of the design — it sidesteps the genuinely painful parts of self-hosting email (SMTP server hardening, IP reputation, spam-blacklist fights) by leaning on Cloudflare's existing mail-routing infrastructure, and the one-click deploy keeps setup approachable for a self-hoster.
The honest caveats: this is a young project (under 800 stars, recent and active but not yet battle-tested at scale) from an individual developer, not an established mail provider — expect occasional rough edges and don't bet mission-critical business email on it yet. It's also inherently tied to Cloudflare's platform and its free-tier limits, so it's not a fit if you want portability across cloud providers or need guarantees beyond what Cloudflare's free tier offers.
💰 Pricing
📊 Global score
🤖 AI-enriched data
Gratuit et open source, déployé sur le compte Cloudflare de l'utilisateur (dans les limites du plan gratuit Cloudflare).
Pros
Entièrement gratuit — s'appuie sur le palier gratuit de Cloudflare plutôt qu'un abonnement email payant
Construit sur les briques Cloudflare (Workers, D1, R2, Email Routing) — évite les pièges classiques de l'auto-hébergement email (réputation IP, blacklists)
Déploiement en un clic vers un compte Cloudflare
Notifications temps réel via WebSocket, résumé IA des messages
Cons
Projet jeune (moins de 800 étoiles GitHub), pas encore éprouvé à grande échelle
Dépendant de la plateforme Cloudflare et des limites de son offre gratuite
Pas adapté à un usage email professionnel critique pour l'instant