Messages the server
can never read.
IronSeal is a zero-knowledge encrypted messaging platform. Your private keys never leave your device. Even we couldn't decrypt your conversations if we tried.
Pure text. No files. No images. No attack surface. 30-day auto-delete.
ECDH P-256Built for people who refuse to trust the server.
Every primitive is selected so that compromising the server reveals nothing about your messages.
Four steps. No middlemen.
Messages sent before your keys sync are unrecoverable.
Every message is encrypted on the sender's device against your public key at the moment of sending. If your device hadn't published a public key yet — or you're signing in on a fresh device — any messages sent in that window are mathematically sealed. Not even we can open them. Ask the sender to resend and it will arrive normally.
Similarly, your own outgoing messages are encrypted to the recipient's key, not yours. To let you re-read what you sent after a reload, we keep a local plaintext copy on your device, gated behind the same biometric prompt. Tap decrypt on your own message to reveal it — just like a recipient would.
This isn't a bug. It's the cost of a server that can't read your messages — and the reason it can't.
No files. No images. No attack surface.
Every major messaging CVE in the last five years involved a malicious file, a crafted image, or an exploit-laden document. WhatsApp, Telegram, Signal — they all share files, and it's where their vulnerabilities live.
IronSeal is pure encrypted text. We deliberately excluded file sharing, image uploads, and media attachments. The attack surface is the message text itself, encrypted with AES-256-GCM. That's it. Nothing to parse. Nothing to exploit. Nothing to scan.
Built for people who can't afford a leak.
If your messages getting exposed means lawsuits, lost clients, or lives at risk — IronSeal is for you.
Free. Full encryption. No catch.
Every security feature, unlimited messaging, forever. We build the Business tier when there's proof people want it.
- Full encryption stack — ECDH P-256 + AES-256-GCM + PFS
- 30-day message auto-delete
- Encrypted group chat
- Tamper protection (dead man's switch)
- Self-destructing messages
Need admin controls, compliance exports, and team management for your organization? Business plans coming soon —
If we got subpoenaed, we'd have nothing to hand over.
IronSeal's database has no plaintext column. The WebSocket relay validates that ciphertext exists and rebroadcasts it — it never inspects the bytes.
Private keys are generated client-side, encrypted with a PBKDF2-derived key, and stored in IndexedDB. They never traverse the network. Lose the device, lose access — that's the point.
Every message uses a fresh ephemeral keypair, so even a complete server breach plus identity-key compromise doesn't retroactively decrypt past conversations.
The audit log is hash-chained (SHA-256, append-only) so any tampering with the security record is mathematically detectable — without ever recording the content of a single message.
We deliberately excluded file sharing, image uploads, and media attachments. Every CVE in WhatsApp, Telegram, and Signal's history involving malicious files, crafted images, or exploit-laden documents — none of that exists here. The attack surface is the message text, encrypted with AES-256-GCM. That's it.
Stop trusting servers with your private conversations.
It takes 30 seconds to create an account. Your keys never leave the browser.