Email, private not by policy, but by design.
Full zero-knowledge post-quantum encrypted email for those who value privacy and simplicity.
INK is invite-only. Public registration runs periodically, or ask a friend for an invite. You can also reach us at invite@ink.email
We built INK modern.
A blockchain address for storing data and communicating on the blockchain.
Spin up a disposable address or an alias. For shady sites or anonymity.
Add or migrate in one click from Gmail, Yahoo, Outlook, or other providers.
Privacy is more than a promise. Our source code is verified.
Simple Onboarding
The hardest part wasn't building the most secure email architecture.
It was making it easier to use than the most popular one.
Other private email providers lock you into a closed, often immature ecosystem:
INK keeps it optionally closed. Connect to any external service. We'll warn you about the risks, nothing more:
Real utility. Not buzzwords.
Features others charge for or never bother to build, included for free:
- Signature generator
- Optional AI agent integrations
- Email & Auto-reply templates
- Public profile & Contact form
- In-App video meetings
Every pixel works. Nothing is here just to look busy.
- We studied real user needs instead of overloading the interface with corpo-slop.
- Even the app bundle is built to weigh 1/3 of competitors, just from architectural economy.
Trust nothing, encrypt everything:
Password sent to server. The server knows your secret, and so does anyone who compromises it.
Zero-knowledge auth per RFC 9497. Password never leaves your device. Only Proof reaches the server. Poof, magic!
Hybrid key encapsulation resistant to both classical and quantum attacks.
Dual-layer signatures valid today and safe against future quantum threats.
Password to master key via memory-hard Argon2id, then deterministic subkey derivation with HKDF.
High-performance cryptographic hashing for message integrity verification.
Authenticated encryption with 192-bit nonces. Tamper-proof by design.
Each session uses unique ephemeral keys. A compromised key cannot decrypt past traffic.
Message bodies and metadata (headers, subjects, timestamps and routing data) are encrypted alongside.
Optional hardening layer. Disk encryption keys live only in RAM. Power loss renders all storage unreadable.
We don't even know your name. We just know you exist. And that's enough for us.
Plaintext
End-to-End Encrypted
Post-Quantum Cryptography
Zero-Knowledge
Judge by facts, not marketing.
| Features | INK | Tuta | ProtonMail | EtherMail | Mailbox |
|---|---|---|---|---|---|
| Zero-access encryption | |||||
| Crypto payments | |||||
| Password emails | |||||
| Open source client | |||||
| Email migration tool | |||||
| E2EE PQC encryption | |||||
| No-backdoor jurisdiction | |||||
| No IP logging | |||||
| ZK auth (OPAQUE) | |||||
| Forward secrecy | |||||
| Key rotation & recovery | |||||
| Decentralization | |||||
| RAM-only servers | |||||
| Temporary email | |||||
| Third-party integrations |
* We don't compare ourselves with Gmail, Yahoo, and other basic email services. They have zero merits besides recognition
Less than a coffee. More than an email.
For pofessional use
Get Bottle- Decentralization
- 20 GB
- 20 aliases
- 5 custom domains
- Priority support
- Priority support
For teams
Get Bucket- Decentralization
- 25 GB / user
- 25 aliases
- 10 custom domains
- Priority support
- SSO & SCIM
- Admin console
- Team management
- Audit logs
* Storage in all plans will grow proportionally as our community expands
Get INK on any device.
iOS 16+ / Android 10+
Windows 10+ / macOS 12+ / pacman, nix, apt
INK is always open to collaborate.
Found a vulnerability? We reward responsible disclosure. Report security issues to our team and help make INK safer for everyone.
Report a BugHelp us speak every language. Contribute translations, suggest improvements, and make private email accessible worldwide.
TranslateJoin our team to contribute to the future of secure communication. Whether you write code, work in cryptography, or design - we'd love to meet you.
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