Mephisto – A RAM-only, ad-free disposable email PWA built with React
Hi HN, I built Mephisto because I was frustrated with the current state of disposable email services—most are riddled with intrusive ads, trackers, and captchas. I wanted a tool that felt like a proper developer utility rather than a spam farm. The stack is React, Vite, and Tailwind. Key architectural decisions: 1. Volatile Memory: The backend writes nothing to disk. Once a session terminates, the data is irretrievable. 2. Client-Side Entropy: The password generator runs locally in the browser; keys are never sent to the server. 3. PWA: It's installable and designed for low latency using…
In plain words
Mephisto is a disposable email service built as a progressive web app for developers who want a cleaner alternative to ad-heavy competitors. It stores data only in RAM—everything disappears when the session ends—and generates passwords locally in the browser without sending keys to servers. The tool features WebSocket-based mail delivery for low latency, an installable PWA interface, and the ability to transfer active sessions to mobile via encrypted QR code. It's free and open for public use.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hi HN, I built Mephisto because I was frustrated with the current state of disposable email services—most are riddled with intrusive ads, trackers, and captchas. I wanted a tool that felt like a proper developer utility rather than a spam farm. The stack is React, Vite, and Tailwind. Key architectural decisions: 1. Volatile Memory: The backend writes nothing to disk. Once a session terminates, the data is irretrievable. 2. Client-Side Entropy: The password generator runs locally in the browser; keys are never sent to the server. 3. PWA: It's installable and designed for low latency using WebSockets for incoming mail (no polling). 4. Mobile Handoff: You can transfer an active session to mobile via an encrypted QR code. It is completely free and open for public use. I'd love to hear your feedback on the implementation and UI.
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