A Firefox Send alternative that picks up where Mozilla left off
Mozilla discontinued Firefox Send in 2020. If you miss encrypted, link-based, self-destructing file sharing, KyberCrypt is built the same way — and goes further with hybrid post-quantum encryption.
What made Firefox Send great — and what KyberCrypt keeps
- Encrypted before it leaves your device (our client-side "maximum privacy" mode).
- Share by link — the recipient needs no account to download.
- Self-destructing files — deleted the moment they're downloaded.
- Optional password protection on the link.
| Firefox Send | KyberCrypt | |
|---|---|---|
| Status | Discontinued (2020) | Active, maintained |
| Encryption | Client-side, end-to-end | Hybrid post-quantum (ML-KEM-768 + X25519) + AES-256-GCM; client-side option |
| Self-destructing links | Yes | Yes — burn after download |
| Password-protected links | Yes | Yes |
| Recipient needs an account | No | No |
| Cost | Free (until shutdown) | Free tier + paid plans |
More than a replacement: post-quantum from day one
Firefox Send used strong classical encryption. KyberCrypt combines ML-KEM-768 (the NIST post-quantum standard) with X25519, so a file intercepted today can't be decrypted later by a quantum computer — the "harvest-now, decrypt-later" threat that matters for anything meant to stay private for years. It's the same belt-and-suspenders approach modern TLS and Signal use.
If Firefox Send was your tool for sending something quickly and privately, KyberCrypt is the closest thing to a successor — and then some.
Post-quantum encrypted file transfer. Free plan, no card required.