Drop our SDK into your iOS, Android, or web app. Every message between your users is ratchet-encrypted on their own device, using the same Signal Protocol stack that powers Zoza. Your backend never sees plaintext. Neither does ours. Neither does anyone.
Every "chat API" on the market either holds your users' keys or asks them to trust a lock icon. Zoza is the first one that gives every message a cryptographic proof your users can verify themselves — and ships it as a drop-in SDK for anyone.
All crypto runs on-device inside your users' app. Zoza's relay infrastructure stores and routes ciphertext only. We can't decrypt. Even under subpoena.
X4DH key agreement, Double Ratchet, Sender Keys for groups, Channel Keys for broadcasts. Forward secrecy, break-in recovery, per-device ratchets. Not a re-implementation — the real thing, battle-tested on Zoza.
Unique to Zoza: your users can tap any message to see the cipher, key fingerprint, ratchet step, IV, and full ciphertext. They can decrypt it with their own key and prove it. No other chat API offers this.
iOS (Swift), Android (Kotlin), Flutter, React Native, web (TypeScript). One identity model, one ratchet session, one lock-popup UI. Your code, your brand.
Singapore, Amsterdam, Virginia. Messages route through the closest PoP. Sub-100ms tail latency for the 95th percentile. You get the scale without running it.
HIPAA-friendly architecture. GDPR data-minimization by default. Crypto layer open for review. SOC 2 roadmap Q3 2026. Bring this to your legal team.
Install the SDK, initialize with your API key, and every message your users send is ratchet-encrypted on-device. The relay handles delivery, multi-device fan-out, and offline queueing automatically.
If your users are trusting you with something valuable — money, health, identity, conversations — "trust me, it's encrypted" isn't good enough. Zoza gives you real E2E, and gives your users the proof.
Account managers messaging wealth clients. Internal ops chat. Compliance-grade audit logs without the server ever seeing the content. Default for regulated messaging.
Doctor-patient messaging with HIPAA-grade privacy. Imaging attachments. Prescription reviews. The cryptographic proof your compliance team keeps asking for.
Encrypted DMs between wallet addresses. Trading group chats. DAO governance rooms. Privacy native to your audience — built on the same primitives their wallets use.
Abuse, trust, and privacy all demand real E2E. Zoza gives you the cryptography, the verification UX, and the moderation hooks — without touching plaintext.
Ship "Zoza Secure Messaging" pre-installed on your devices. Co-branded SDK, white-label UI, your own lock-popup that says "Verified by Zoza". Compete with iMessage on privacy — without reinventing the crypto stack.
Internal team chat where IT can't read messages and neither can your chat vendor. On-prem relay option. Bring-your-own-key for identity. Audit without surveillance.
Legitimate question. Signal has been open-source for a decade. WhatsApp handles 100 billion messages a day. SendBird and Stream and CometChat have been building chat APIs for years. Why is there no E2E-as-a-Service on the market?
Signal's mission is consumer messaging for human rights defenders, journalists, and normal people who want privacy. They open-source libsignal as a library, but they don't run it as a developer service — that's not what they exist for. A dev who wants to use it today has to build and host the entire XMPP-like relay backend, key directory, push infrastructure, and client wrapping themselves. That's six months of work, minimum.
Meta acquired WhatsApp for $19 billion to reach users, not to sell privacy primitives. Meta's core business model depends on seeing content to target ads. Offering "E2E as a service" to other developers would directly undermine their internal incentives. It will never happen.
Their features — search, moderation, analytics, history replay, spam filters, AI suggestions — all require the server to read messages. Their entire product is built on that assumption. If they flipped to E2E, they'd lose 70% of their feature set overnight. So they advertise "encryption in transit and at rest" and quietly hold the keys. Zoza's users see a cipher. Their users see a promise.
Even with libsignal available, wrapping it into a dev-friendly SDK, running multi-region relay infrastructure, handling multi-device key sync, offline queueing, replay protection, OPK pool management, session recovery, and packaging it all with documentation and a five-minute quickstart is a serious engineering project. Most companies would rather sell ads than ship crypto. We built it anyway — because we needed it for Zoza itself.
E2E means the provider can't monetize message content — no ads, no analytics, no "smart replies". The only revenue is usage fees. That's a less juicy model than "chat API + data mining", which is why nobody with shareholders has prioritized it. We don't care. We think verifiable privacy is worth paying for, and apparently the last decade of data breaches suggests the rest of the world is catching up.
Five years ago, E2E was a "nice to have" in most product plans. After the Cambridge Analytica scandal, every major data breach of the 2020s, the Pegasus revelations, and the rise of privacy regulation (GDPR, DPDPA, CCPA), users and legal teams are finally asking "prove it's encrypted" — not "is it encrypted?". The market is here. The product wasn't. Now it is.
Feature-by-feature comparison with the leading chat APIs and messengers.
Free to build, pay when your users do. No SKUs, no sales calls for the first 10,000 users, no surprise bills.
For prototypes, side projects, and early-stage apps.
For production apps ready to launch.
For OEMs, regulated industries, and global scale.
We're opening the SDK to a small group of early-access developers. Leave your email and we'll reach out with the docs, a sandbox API key, and a private Discord for integration questions.
No spam. No marketing lists. We'll email you once when the SDK is ready.